-
An airborne hyperspectral remote sensing dataset was obtained of the North Pole Dome region of the Pilbara Craton in October 2002. It has been analyzed for indications of hydrothermal minerals. Here we report on the identification and mapping of hydrothermal m…
arxiv
Adrian J. Brown, Thomas J. Cudahy, Malcolm R. Walter
2014-01-24T20:51:20Z
置信度 0.78
astro-ph.EPphysics.geo-ph
-
We report on a search for electro-magnetic and/or hadronic showers (cascades) induced by high energy neutrinos in the data collected with the AMANDA II detector during the year 2000. The observed event rates are consistent with the expectations for atmospheric…
arxiv
the AMANDA Collaboration, M. Ackermann
2004-05-12T01:23:33Z
置信度 0.78
astro-ph
-
The Breakthrough Listen Initiative has embarked on a comprehensive SETI survey of nearby stars in the Milky Way that is vastly superior to previous efforts as measured by a wide range of different metrics. SETI surveys traditionally ignore the fact that they a…
arxiv
M. A. Garrett, A. P. V. Siemion
2022-09-16T19:36:07Z
置信度 0.78
astro-ph.HEastro-ph.EPastro-ph.GAphysics.pop-ph
-
Measuring the solar neutrino flux over gigayear timescales could provide a new window to inform the Solar Standard Model as well as studies of the Earth's long-term climate. We demonstrate the feasibility of measuring the time-evolution of the $^8$B solar neut…
arxiv
Natalia Tapia Arellano, Shunsaku Horiuchi
2021-02-02T21:09:31Z
置信度 0.78
hep-phastro-ph.HEastro-ph.IMastro-ph.SRhep-ex
-
The remote mapping of minerals and discrimination of ore and waste on surfaces are important tasks for geological applications such as those in mining. Such tasks have become possible using ground-based, close-range hyperspectral sensors which can remotely mea…
arxiv
Lloyd Windrim, Arman Melkumyan, Richard J. Murphy, Anna Chlingaryan 等
2023-02-09T21:03:03Z
置信度 0.78
cs.CV
-
Are microlensing searches likely to discover planets that harbor life? Given our present state of knowledge, this is a difficult question to answer. We therefore begin by asking a more narrowly focused question: are conditions on planets discovered via microle…
arxiv
Rosanne Di Stefano
1998-08-24T01:12:55Z
置信度 0.78
astro-ph
-
Interest in extraterrestrial phenomena and conspiracy theories involving UFOs and reptilians has been growing on Brazilian Telegram, especially in times of global uncertainty, such as during the COVID-19 pandemic. Therefore, this study aims to address the rese…
arxiv
Ergon Cugler de Moraes Silva
2024-08-31T01:53:20Z
置信度 0.78
cs.CY
-
This paper introduces a novel method for characterizing fracture mechanisms in composite materials using 3D image data gained by computed tomography (CT) measurements. In mineral liberation, the understanding of these mechanisms is crucial, particularly whethe…
arxiv
Thomas Wilhelm, Trang Thu Võ, Orkun Furat, Urs A. Peuker 等
2024-02-11T19:56:00Z
置信度 0.78
cond-mat.mtrl-sci
-
COSIMA (COmetary Secondary Ion Mass Analyser) is a time-of-flight secondary ion mass spectrometer (TOF-SIMS) on board the Rosetta space mission. COSIMA has been designed to measure the composition of cometary dust grains. It has a mass resolution m/Δm of 1400 …
arxiv
Harald Krüger, Thomas Stephan, Cécile Engrand, Christelle Briois 等
2015-01-04T20:26:35Z
置信度 0.78
astro-ph.EP
-
The union of space telescopes and interstellar spaceships guarantees that if extraterrestrial civilizations were common, someone would have come here long ago.
arxiv
B. Zuckerman
2019-12-18T05:36:43Z
置信度 0.78
physics.pop-phastro-ph.EP
-
Most amino acids and sugars molecules occur in mirror, or chiral, images of each other, knowns as enantiomers. However, life on Earth is mostly homochiral: proteins contain almost exclusively L-amino acids, while only D-sugars appear in RNA and DNA. The mechan…
arxiv
Marcelo Gleiser
2022-05-02T20:14:17Z
置信度 0.78
astro-ph.EPphysics.bio-phq-bio.BM
-
In the winter of 1967 Cambridge radio astronomers discovered a new type of radio source of such an artificial seeming nature that for a few weeks some members of the group had to seriously consider whether they had discovered an extraterrestrial intelligence. …
arxiv
Alan Penny
2013-02-04T10:54:49Z
置信度 0.78
physics.hist-phastro-ph.IMastro-ph.SR
-
We critically examine the evidence for the idea that encephalization quotients increase with time. We find that human-like intelligence is not a convergent feature of evolution. Implications for the search for extraterrestrial intelligence are discussed.
arxiv
Charles H. Lineweaver
2007-11-12T11:36:29Z
置信度 0.78
q-bio.PE
-
Technosignatures can represent a sign of technology that may infer the existence of intelligent life elsewhere in the universe. This had usually meant searches for extraterrestrial intelligence using narrow-band radio signals or pulsed lasers. Back in 1960 Fre…
arxiv
A. A. Jackson, Gregory Benford
2020-09-14T16:08:53Z
置信度 0.78
physics.pop-ph
-
The METI risk problem refers to the uncertain outcome of sending transmissions into space with the intention of messaging to extraterrestrial intelligence (METI). Here, I demonstrate that this uncertainty is undecidable by proving that that the METI risk probl…
arxiv
Jacob Haqq-Misra
2018-04-05T14:53:55Z
置信度 0.78
physics.pop-ph
-
Long-duration human missions to Mars will require autonomous systems capable of converting in situ resources into structural materials, tools, and functional components. More broadly, such systems represent a class of resource-limited bioprocesses relevant to …
arxiv
Nisha Rokaya, Erin C. Carr, Kumar Shrestha, Richard A. Wilson 等
2024-06-04T17:41:25Z
置信度 0.78
q-bio.CBastro-ph.EPastro-ph.IMphysics.pop-ph
-
Spin crossover of iron is of central importance in solid Earth geophysics. It impacts all physical properties of minerals that altogether constitute $\sim 95$ vol\% of the Earth's lower mantle: ferropericlase [(Mg,Fe)O] and Fe-bearing magnesium silicate (MgSiO…
arxiv
Han Hsu, Renata M. Wentzcovitch
2014-10-27T12:14:46Z
置信度 0.78
cond-mat.str-elcond-mat.mtrl-sciphysics.geo-ph
-
In this paper we review the search for astrophysical neutrinos. We begin by summarizing the various theoretical predictions which correlate the expected neutrino flux with data from other messengers, specifically gammas and ultra-high energy cosmic rays. We th…
arxiv
Luis A. Anchordoqui, Teresa Montaruli
2009-12-06T21:53:17Z
置信度 0.78
astro-ph.HE
-
There is a close interrelation between Searching for Extraterrestrial Intelligence (SETI) and Messaging to Extraterrestrial Intelligence (METI). For example, the answers to the questions "Where to search" and "Where to send" are equivalent, in that both requir…
arxiv
Alexander Zaitsev
2007-11-15T12:46:32Z
置信度 0.78
physics.pop-ph
-
In this paper, we propose a novel method for distinguishing extraterrestrial intelligence (ETI) signals from radio frequency interference (RFI) by leveraging polarization features. We exploit the sinusoidal variation of the linearly polarized components of Sto…
arxiv
Jian-Kang Li, Yu Chen, Zhen-Zhao Tao, Xiao-Hang Luan 等
2023-05-25T04:58:33Z
置信度 0.78
astro-ph.IMastro-ph.EPastro-ph.SR
-
Sodium-ion batteries have garnered significant attention as a potentially low-cost alternative to lithium-ion batteries, which have experienced supply shortages and pricing volatility of key minerals. Here we assess their techno-economic competitiveness agains…
arxiv
Adrian Yao, Sally M. Benson, William C. Chueh
2024-03-20T17:14:55Z
置信度 0.78
physics.chem-phcond-mat.mtrl-sci
-
A comparison is made of the probability of the process of two neutrino double beta decay for $^{82}$Se in direct (counter) and geochemical experiments. It is shown that the probability is systematically lower in geochemical experiments, which characterize the …
arxiv
A. S. Barabash
2002-10-08T12:39:26Z
置信度 0.78
nucl-ex
-
The history of astronomical discovery shows that many of the most detectable phenomena, especially detection firsts, are not typical members of their broader class, but rather rare, extreme cases with disproportionately large observational signatures. Motivate…
arxiv
David Kipping
2025-12-10T12:10:09Z
置信度 0.78
physics.pop-phastro-ph.IM
-
On page 10 of the 2018 National Academies Exoplanet Science Strategy document (NASEM 2018), 'Expect the unexpected' is described as a general principle of the exoplanet field. But for the next 150 pages, this principle is apparently forgotten, as strategy deci…
arxiv
Peter Vickers
2021-05-19T10:46:19Z
置信度 0.78
astro-ph.IMphysics.hist-phphysics.space-ph
-
A key open question in the study of life is the origin of biomolecular homochirality: almost every life-form on Earth has exclusively levorotary amino acids and dextrorotary sugars. Will the same handedness be preferred if life is found elsewhere? We review so…
arxiv
Marcelo Gleiser, Sara Imari Walker
2012-02-22T21:18:00Z
置信度 0.78
q-bio.BMastro-ph.EPphysics.chem-ph
-
As a guide for astronomers new to the field of technosignature search (i.e. SETI), I present an overview of some of its observational and theoretical approaches. I review some of the various observational search strategies for SETI, focusing not on the variety…
arxiv
Jason T. Wright
2021-07-15T12:28:56Z
置信度 0.78
astro-ph.IMphysics.pop-ph
-
We investigate looking for black hole starships using very high energy gamma ray telescopes. We find they would be above the threshhold of visibility although there are many unknown factors.
arxiv
Louis Crane
2019-02-23T22:22:11Z
置信度 0.78
gr-qcastro-ph.HE
-
In order to examine how the terrestrial life emerged, a number of laboratory experiments have been conducted since the 1950s. Methane has been one of the key molecules in these studies. In earlier studies, strongly reducing gas mixtures containing methane and …
arxiv
Kensei Kobayashi, Wolf D. Geppert, Nathalie Carrasco, Nils G. Holm 等
2018-06-06T09:49:52Z
置信度 0.78
astro-ph.EP
-
Interpreting the mineralogical aspects of rock thin sections is an important task for oil and gas reservoirs evaluation. However, human analysis tend to be subjective and laborious. Technologies like QEMSCAN(R) are designed to automate the mineralogical mappin…
arxiv
Jean Pablo Vieira de Mello, Matheus Augusto Alves Cuglieri, Leandro P. de Figueiredo, Fernando Bordignon 等
2025-05-22T17:58:34Z
置信度 0.78
cs.CVeess.IV
-
Dust grains of crystalline silicate, which are rarely presented in interstellar space, were found in cometary nuclei. These crystalline silicates are thought to have formed by annealing of amorphous silicate grains or direct condensation of gaseous materials n…
arxiv
Yoshiharu Shinnaka, Takafumi Ootsubo, Hideyo Kawakita, Mitsuru Yamaguchi 等
2018-08-23T02:06:07Z
置信度 0.78
astro-ph.EP
-
Aeolian sand transport is a major process shaping landscapes on Earth and on diverse celestial bodies. Conditions favoring bimodal sand transport, with fine-grain saltation driving coarse-grain reptation, give rise to the evolution of megaripples with a charac…
arxiv
Katharina Tholen, Thomas Pähtz, Hezi Yizhaq, Itzhak Katra 等
2022-08-01T14:22:21Z
置信度 0.78
physics.geo-phcond-mat.softphysics.ao-ph
-
The search for extraterrestrial life has long been a primary focus of scientific exploration, driven by rapid advancements in technology and our understanding of the universe. The discovery of water on Mars has sparked significant interest, raising the questio…
arxiv
Bibek Adhikari, Rishab Rijal, Rakesh Yadav, Nikchey Khatri 等
2026-01-23T20:32:33Z
置信度 0.78
eess.SYastro-ph.EPastro-ph.IMcs.RO
-
openalex
Andy H. Shen, John I. Koivula, James E. Shigley
2011-09-01
置信度 0.72
Extraterrestrial lifeTRACE (psycholinguistics)Identification (biology)GeologyAstrobiology
-
Abstract— Batch culture experiments were performed to investigate the weathering of meteoritic material by iron‐oxidizing bacteria. The aerobic, acidophilic iron oxidizer (A. ferrooxidans) was capable of oxidizing iron from both carbonaceous chondrites (Murchi…
openalex
Aaron Gronstal, V. K. Pearson, Andreas Kappler, Craig DOORIS 等
2009-02-01
置信度 0.72
ChondriteMeteoriteMurchison meteoriteWeatheringIron bacteria
-
openalex
P. V. Johnson, Robert Hodyss, Tuan H. Vu, Mathieu Choukroun
2018-12-11
置信度 0.72
AstrobiologyExtant taxonSolar SystemEarth scienceExtraterrestrial life
-
openalex
Oleg S. Vereshchagin, Maya O. Khmelnitskaya, Mikhail N. Murashko, Yevgeny Vapnik 等
2024-03-21
置信度 0.72
Mineral redox bufferGeologyTroiliteGeochemistryPyroxene
-
This essay examines the militarization of extraterrestrial and extraterritorial spaces such as the high seas, outer space, and Antarctica since the onset of the Cold War. While environmental studies has generally focused on national topographies, this essay in…
openalex
Elizabeth DeLoughrey
2014-01-01
置信度 0.72
MilitarizationVisionOuter spaceExtraterrestrial lifeAnthropocene
-
openalex
Kenan Cao, Mingtan Dong, Zhenbing She, Qian Xiao 等
2022-06-24
置信度 0.72
Lunar soilPyroxeneMineralogyParticle sizeOlivine
-
This review systematically presents all finds of geogenic, impact-induced, and extraterrestrial iron silicide minerals known at the end of 2021. The respective morphological characteristics, composition, proven or reasonably suspected genesis, and possible cor…
openalex
Michael A. Rappenglück
2022-01-31
置信度 0.72
Natural (archaeology)SilicideGeochemistryEarth scienceAstrobiology
-
openalex
Katie E Bristol, E. J. Piispa, A. V. Smirnov
2020-12-01
置信度 0.72
Extraterrestrial lifeAstrobiologyGeologyEarth sciencePhysics
-
NASA's LeRC has supported several efforts to understand how lunar and Martian produced propellants can be used to their best advantage for space exploration propulsion. A discussion of these efforts and their results is presented. A Manned Mars Mission Analysi…
openalex
Diane Linne, Michaël Meyer
1991-01-01
置信度 0.72
PropellantMonopropellantAerospace engineeringMartianAstrobiology
-
Phosphate minerals in ordinary chondrites provide a record of fluids that were present during metamorphic heating of the chondrite parent asteroids. We have carried out a petrographic study of the phosphate minerals, merrillite and apatite, in metamorphosed H …
openalex
R. H. Jones, F. M. McCubbin, Yunbin Guan
2016-11-01
置信度 0.72
ChondriteGeologyGeochemistryBrecciaApatite
-
Knowledge of the occurrences of water films on minerals is critical for global biogeochemical and atmospheric processes, including element cycling and ice nucleation. The underlying mechanisms controlling water film growth are, however, misunderstood. Using in…
openalex
Sibel Ebru Yalcin, Benjamin A. Legg, Merve Yeşilbaş, Nikhil S. Malvankar 等
2020-07-24
置信度 0.72
NanometreSurface tensionAnisotropyMaterials scienceNanoparticle
-
Europa's salty side New findings from the Galileo spacecraft show that the surface of Jupiter's moon Europa appears to contain salts—a result that strengthens all the tantalizing hypotheses that a liquid ocean exists under the satellite's icy crust. The presen…
openalex
1998-05-25
置信度 0.72
CitationAltmetricsSocial mediaComputer scienceIcon
-
openalex
Robert B. Trumbull, Jingsui Yang, Paul T. Robinson, Simonpietro Di Pierro 等
2009-07-09
置信度 0.72
OphioliteMantle (geology)GeologyGeochemistryKimberlite
-
openalex
Martine Rossignol‐Strick, Elso S. Barghoorn
1971-12-01
置信度 0.72
MeteoriteParent bodyChondriteCarbonaceous chondriteMurchison meteorite
-
A large collection of micrometeorites has been recently extracted from Antarctic old blue ice. In the 50 to 100 micrometers size range, the carbonaceous micrometeorites represent 80% of the samples and contain 2% of carbon. They might have brought more carbon …
openalex
Bernard Barbier, Marylène Bertrand, François Boillot, A. Chabin 等
1998-01-01
置信度 0.72
Amino acidMurchison meteoriteMeteoriteAstrobiologyEarth (classical element)
-
openalex
Anna H. Kaksonen, Jochen Petersen
2022-11-14
置信度 0.72
BioleachingSustainabilityEnvironmental scienceWaste managementEngineering
-
openalex
Dietmar Weber, A. Bischoff
1994-09-01
置信度 0.72
MeliliteMurchison meteoriteChondriteMeteoriteAllende meteorite
-
We report the discovery of fossil micrometeorites from Late Cretaceous chalk. Seventy-six cosmic spherules were recovered from Coniacian (87±1 Ma) sediments of the White Chalk Supergroup. Particles vary from pristine silicate and iron-type spherules to pseudom…
openalex
Martin D. Suttle, M. J. Genge
2017-09-02
置信度 0.72
GeologyDiagenesisMagnetiteSedimentary rockGeochemistry
-
We present the first integrated study of carbonate, hydroxyl, fluoride, and chloride ion partitioning in the apatite-melt system. We determined volatile partitioning behavior between apatite and silicate melt for both haplobasaltic andesite and trachyte bulk c…
openalex
J. Riker, Madeleine C. S. Humphreys, Richard A. Brooker, Jan C.M. De Hoog 等
2017-10-18
置信度 0.72
ApatiteSilicateHalogenTrachytePartition coefficient
-
The Mars Science Laboratory Curiosity rover has encountered both ancient lithified and modern active aeolian dune deposits within Gale crater, providing an opportunity to study how aeolian processes have changed during Gale crater's geological history. This st…
openalex
C. C. Bedford, S. P. Schwenzer, J. C. Bridges, Steven G. Banham 等
2020-01-15
置信度 0.72
MaficFelsicGeologyProvenanceGeochemistry
-
Rare earth elements (REE) include the lanthanide series elements (La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) plus Sc and Y. Currently these metals have become very critical to several modern technologies ranging from cell phones and televi…
openalex
V. Balaram
2019-03-12
置信度 0.72
Neutron activation analysisInductively coupled plasma mass spectrometryEnvironmental scienceRare earthMass spectrometry
-
Abstract Ablation of Mg from meteoroids entering the Earth's atmosphere was studied experimentally using a Meteoric Ablation Simulator: micron‐sized particles of representative meteoritic material were flash heated to simulate atmospheric entry and the ablatio…
openalex
David L. Bones, Juan Carlos Gómez Martı́n, J. D. Carrillo Sánchez, Alexander Dobson 等
2018-04-19
置信度 0.72
MeteoroidAblationAtmosphere (unit)Laser ablationAtmospheric entry
-
Minerals contain important clues to understanding the complex geologic history of Earth and other planetary bodies. Therefore, geologists have been collecting mineral samples and compiling data about these samples for centuries. These data have been used to be…
openalex
Anirudh Prabhu, Shaunna M. Morrison, Ahmed Eleish, Hao Zhong 等
2020-11-11
置信度 0.72
Earth scienceGeoinformaticsMineral explorationComputer scienceGeology
-
Abstract Minerals are information-rich materials that offer researchers a glimpse into the evolution of planetary bodies. Thus, it is important to extract, analyze, and interpret this abundance of information to improve our understanding of the planetary bodie…
openalex
Anirudh Prabhu, Shaunna M. Morrison, Peter Fox, Xiaogang Ma 等
2023-01-31
置信度 0.72
InformaticsData scienceField (mathematics)Computer scienceAnalytics
-
Detecting signs of potential extant/extinct life on Mars is challenging because the presence of organics on that planet is expected to be very low and most likely linked to radiation-protected refugia and/or preservative strategies (e.g., organo-mineral comple…
openalex
Laura Sánchez‐García, Daniel Carrizo, A. Molina, Victoria Muñoz–Iglesias 等
2020-12-03
置信度 0.72
Mars Exploration ProgramHydrothermal circulationSulfurAstrobiologyChemistry
-
Rationale The precise determination of Δ' 17 O values in terrestrial material is becoming increasingly important to understand the mass‐dependent fractionation processes that cause variations in oxygen isotope ratios. San Carlos olivine is widely used as the r…
openalex
Andreas Pack, Ryoji Tanaka, Markus Hering, Sukanya Sengupta 等
2016-06-08
置信度 0.72
OlivineIsotopes of oxygenMineralogyChemistryFractionation
-
Uakitite was observed in small troilite–daubréelite (±schreibersite) inclusions (up to 100 µm) and in large troilite–daubréelite nodules (up to 1 cm) in Fe-Ni-metal (kamacite) of the Uakit iron meteorite (IIAB), Republic of Buryatia, Russia. Such associations …
openalex
V. V. Sharygin, G. S. Ripp, G. A. Yakovlev, Yurii V. Seryotkin 等
2020-02-10
置信度 0.72
TroiliteKamaciteIron meteoriteMeteoriteMineralogy
-
openalex
I. Weber, Ute Böttger, С.Г. Павлов, E. K. Jeßberger 等
2014-09-28
置信度 0.72
FayaliteForsteriteAstrobiologyMartianMars Exploration Program
-
The soil in and around the Kaali meteorite craters in the SE part of Saaremaa Island contains a large number of micrometeorites and abounds in pulverized extraterrestrial and impactite matter. The explosion with accompanying high temperatures resulted in the f…
openalex
Anto Raukas
2004-01-01
置信度 0.72
Extraterrestrial lifeImpact craterGeologyMeteoriteAstrobiology
-
openalex
K. J. Mathew, S. V. S. Murty
1993-09-01
置信度 0.72
Cosmic rayMeteoriteAstrophysicsPhysicsDecoupling (probability)
-
Abstract Understanding the composition of clay-rich sediments and their transportation into proximal marine basins allows us to better decipher hydroclimatic changes before and within the Palaeocene–Eocene Thermal Maximum (PETM). Only a limited number of such …
openalex
Simon J. Kemp, Michael A. Ellis, Ian Mounteney, Sev Kender
2016-12-01
置信度 0.72
GeologySedimentary rockClay mineralsIlliteKaolinite
-
Abstract Magmatic systems are dominated by five volatiles, namely H2O, CO2, F, Cl, and S (the igneous quintet). Multiple studies have measured partitioning of four out of these five volatiles (H2O, CO2, F, and Cl) between nominally volatile-free minerals and m…
openalex
Sara Callegaro, Kalotina Geraki, Andrea Marzoli, Ângelo De Min 等
2020-01-15
置信度 0.72
PlagioclaseSulfurPartition coefficientOlivineAmphibole
-
The detection and analysis of extraterrestrial life are important issues of space science. Mars is among the most important planets to explore for extraterrestrial life, owing both to its physical properties and to its ancient and present environments as revea…
openalex
Keigo Enya, Akihiko Yamagishi, Kensei Kobayashi, Yoshitaka Yoshimura
2022-07-09
置信度 0.72
Extraterrestrial lifeAstrobiologySearch for extraterrestrial intelligenceMars Exploration ProgramMartian
-
openalex
Ursula B. Marvin, Marco T. Einaudi
1967-10-01
置信度 0.72
GeologyMagnetiteGeochemistryGreigiteIlmenite
-
Algorithms allowing the deconvolution of hyperspectral data play a key-role in remotely sensed data processing for mineralogical investigation. Modified Gaussian model (MGM) based methods are of particular interest because they are able to retrieve accurate es…
openalex
Andrea Marinoni, H. Clénet
2017-05-12
置信度 0.72
Hyperspectral imagingMars Exploration ProgramDeconvolutionComputer scienceRemote sensing
-
openalex
W. G. Meinschein
1963-11-01
置信度 0.72
MeteoriteChondriteAstrobiologyParent bodyCarbonaceous chondrite
-
Lacustrine carbonate chimneys are striking, metre-scale constructions. If these were bioinfluenced constructions, they could be priority targets in the search for early and extraterrestrial microbial life. However, there are questions over whether such chimney…
openalex
Martin Brasier, David Wacey, Mike Rogerson, Paul Guagliardo 等
2018-06-09
置信度 0.72
CalciteCarbonateAuthigenicGeologyAragonite
-
openalex
Hua Zhang, Shu‐zhong Shen, Changqun Cao, Quan-feng Zheng
2014-03-06
置信度 0.72
GeologyPermianSilicatePyritePaleontology
-
Abstract– Meteorites have traditionally been defined as solid objects that have fallen to Earth from space. This definition, however, is no longer adequate. In recent decades, man-made objects have fallen to Earth from space, meteorites have been identified on…
openalex
Alan E. Rubin, J. N. Grossman
2010-02-01
置信度 0.72
MeteoriteMeteoroidAstrobiologyExtraterrestrial lifeParent body
-
= 46) sourced from the primary literature. High-precision impact ages can be used to (1) reconstruct and quantify the impact flux in the inner Solar System and, in particular, the Earth-Moon system, thereby placing constraints on the delivery of extraterrestri…
openalex
M. Schmieder, D. A. Kring
2019-12-27
置信度 0.72
Impact craterEjectaBiosphereGeologyGeologic record
-
A novel method has been developed for compound-specific nitrogen isotope compositions with an achiral column which was previously shown to offer high precision for nitrogen isotopic analysis. We applied the method to determine the amino acid contents and stabl…
openalex
Q. H. S. Chan, Yoshito Chikaraishi, Yoshinori Takano, Nanako O. Ogawa 等
2016-01-21
置信度 0.72
ChondriteParent bodyChemistryNitrogenIsotopes of nitrogen
-
openalex
Ruidan Liu, Pan Feng, Zhaolong Liu, Long Yuan 等
2025-01-27
置信度 0.72
Fly ashCementZero-energy buildingComposite materialMaterials science
-
Abstract The origin of organic compounds detected in meteorites and comets, some of which could have served as precursors of life on Earth, remains an open question. The aim of the present study is to make one more step in revealing the nature and composition …
openalex
А. В. Потапов, M. E. Palumbo, Z. Dionnet, A. Longobardo 等
2022-08-01
置信度 0.72
AstrobiologyExtraterrestrial lifeMeteoriteSolar SystemFormation and evolution of the Solar System
-
Chi Ma; Nanomineralogy of Meteorites by Advanced Electron Microscopy: Discovering New Minerals and New Materials from the Early Solar System, Microscopy and Mic
openalex
Chi Ma
2015-08-01
置信度 0.72
MeteoriteElectron microscopeAstrobiologyMaterials sciencePhysics
-
High Resolution Image Download MS PowerPoint Slide Lake Magadi, East African Rift Valley, is a hyperalkaline and saline soda lake highly enriched in Na +, K +, CO 3 2–, Cl –, HCO 3 –, and SiO 2 and depleted in Ca 2+ and Mg 2+, where thick evaporite deposits an…
openalex
Melese Getenet, Juan Manuel Garcı́a-Ruiz, Fermı́n Otálora, Franziska Emmerling 等
2022-03-03
置信度 0.72
EvaporiteGeologyGeochemistryEast African RiftCarbonate
-
openalex
Mats E. Eriksson, Anders Lindskog, Mikael Calner, Johanna I.S. Mellgren 等
2012-02-16
置信度 0.72
ConodontGeologyPaleontologyBalticaOrdovician
-
Independent studies, conducted at various laboratories, indicate that the "organized elements" do not seem to be terrestrial contaminants.This evaluation is based mainly upon a consideration of fine morphological criteria.New experiments with biological stains…
openalex
George Claus, Bartholomew Nagy, Dominic L. Europa
1963-06-01
置信度 0.72
George (robot)Library scienceAnnalsCitationArt history
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Deuterium (D)‐rich interplanetary dust particles (IDPs) are the most primitive extraterrestrial materials available for laboratory studies in terms of their mineralogy, chemistry, and isotopic compositions. Transmission electron microscopy analysis of one such…
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L. P. Keller, S. Messenger, J. P. Bradley
2000-05-01
置信度 0.72
Interplanetary dust cloudPyroxeneAmorphous solidCosmic dustPresolar grains
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Christina A. McConville, T. Runcevski
2020-12-01
置信度 0.72
AstrobiologyExtraterrestrial lifePropionitrileGeologyEarth science
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This thesis aims at reconstructing events in the solar system, mainly collisional events in the asteroid belt, by searches for extraterrestrial minerals in Paleogene and Middle Ordovician marine sediments on Earth. Recent empirical evidence show that Earth has…
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Anders Cronholm
2009-01-01
置信度 0.72
OrdovicianMeteoriteGeologyExtraterrestrial lifeChondrite
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D. Jeffrey Over, C.A. Conaway, David Katz, Wayne D. Goodfellow 等
1997-08-01
置信度 0.72
GeologyExtinction eventPlatinum groupConodontHorizon
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Christian Défarge, Pascale Gautret, Joachim Reitner, Jean Trichet
2008-04-18
置信度 0.72
GeologySedimentary rockBiomineralizationGeologic recordExtraterrestrial life
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We report deep-ultraviolet (DUV) Raman spectra as measured by a SHERLOC analog instrument (248.6 nm excitation) for 92 samples representing 62 distinct minerals, including borates, carbonates, sulfates, phosphates, halides, metal oxides & hydroxides, silicate…
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Joseph Razzell Hollis, William Abbey, L. W. Beegle, R. Bhartia 等
2021-10-21
置信度 0.72
Mars Exploration ProgramRaman spectroscopySilicate mineralsMineralSilicate
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As the Solar System formed, it inherited and perpetuated a rich organic chemistry, the products of which are preserved in the carbonaceous chondrites. These organic-rich meteorites provide a valuable and tangible record of the chemical steps towards the evolut…
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V. K. Pearson, A. T. Kearsley, Mark A. Sephton
2004-01-01
置信度 0.72
MeteoriteAstrobiologyChondriteExtraterrestrial lifeOrganic matter
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Christian Koeberl, W. U. Reimold, R. H. Boer
1993-09-01
置信度 0.72
ArcheanGeologyGreenstone beltGeochemistryPlatinum group
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Jean‐Pierre de Vera, U. Boettger, Rosa de la Torre Noetzel, F. J. Sánchez 等
2012-07-13
置信度 0.72
Mars Exploration ProgramAstrobiologyExploration of MarsInternational Space StationSpace exploration
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The presence and distribution of water on the Moon are fundamental to our understanding of the Earth–Moon system. Despite extensive laboratory research and remote sensing explorations, the origin and chemical form of lunar water have remained elusive. In this …
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Shifeng Jin, Munan Hao, Zhongnan Guo, Bohao Yin 等
2024-07-16
置信度 0.72
MineralAmmoniumSample (material)Mineral waterChemistry
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The ChemCam instrument suite on board the NASA Mars Science Laboratory (MSL) rover includes the first LIBS instrument for extraterrestrial applications. Here we examine carbonate minerals in a simulated martian environment using the LIDS technique in order to …
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R. C. Wiens, S. M. Clegg, A. Ollila, J. E. Barefield 等
2024-02-05
置信度 0.72
Mars Exploration ProgramCarbonateMartianAstrobiologyMineralogy
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Iron metal is an opaque phase common in planetary materials both as an igneous mineral and as a space‐weathering by‐product. In either form, iron metal has a large influence on the interpretation of ultraviolet, visible, and near‐infrared spectra of planetary …
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J. T. S. Cahill, D. T. Blewett, Nam Nguyen Van, Kun Xu 等
2012-04-27
置信度 0.72
InfraredUltravioletPrismMaterials scienceVisible spectrum
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Abstract Significant compositional and structural heterogeneity at nm to mm scales is an important characteristic of primitive extraterrestrial materials. Here, we report the analysis of high‐resolution Fourier transform IR hyperspectral imaging analytical mea…
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Z. Dionnet, Alice Aléon‐Toppani, D. Baklouti, Ferenc Borondics 等
2018-07-31
置信度 0.72
MeteoriteSilicateMineralogyFourier transform infrared spectroscopyChondrite
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C. K. Shearer, P. V. Burger, C. R. Neal, Z. D. Sharp 等
2009-10-28
置信度 0.72
AchondritePyroxenePlagioclaseGeologyMeteorite
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Seven lichens (Usnea antarctica and U. aurantiacoatra) and nine moss samples (Sanionia uncinata) collected in King George Island were analyzed using instrumental neutron activation analysis, and concentration of major and trace elements was calculated. For som…
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Tomasz Mróz, Katarzyna Szufa, Marina Frontasyeva, V. A. Tselmovich 等
2017-10-17
置信度 0.72
Neutron activation analysisLichenMossVolcanoTrace element
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Organic compounds are present as complex mixtures in extraterrestrial materials including meteorites, which may have played important roles in the origin of life on the primitive Earth. However, the distribution and formation mechanisms of meteoritic organic c…
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Hiroshi Naraoka, Minako Hashiguchi, Yu Sato, Kenji Hamase
2019-07-26
置信度 0.72
Extraterrestrial lifeTRACE (psycholinguistics)AstrobiologyHigh resolutionRemote sensing
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Thermal evolution of large cometary nuclei (radii ≥ 40 km) due to heating by decay of 238U, 235U, 40K and 232Th is investigated by adopting chemical models based on observations of P/Halley and mineral compositions of C1 chondrites. If the thermal diffusivity …
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S. Yabushita
1993-02-15
置信度 0.72
PhysicsThermal diffusivityAstrobiologyChondriteMeteorite
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Abstract The oldest cell-like structures on Earth are preserved in silicified lagoonal, shallow sea or hydrothermal sediments, such as some Archean formations in Western Australia and South Africa. Previous studies concentrated on the search for organic fossil…
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Francès Westall
1997-01-01
置信度 0.72
BacteriaPrecambrianArcheanBiologyBiota
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High-quality oxygen isotope analysis of composition-variable minerals (e.g., ubiquitous carbonates) using secondary ion mass spectrometry (SIMS) is extremely challenging. The classical off-line procedure, which requires additional electron probe microanalyzer …
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Jingyao Xu, Qiuli Li, Guoqiang Tang, Kai Lu 等
2022-05-26
置信度 0.72
ChemistryDolomiteδ18OAnalytical Chemistry (journal)Electron microprobe
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Abstract Hayabusa2 spacecraft successfully collected rock samples from the surface of C-type near-Earth asteroid 162173 Ryugu through two touchdowns and brought them back to Earth in 2020. At the Extraterrestrial Sample Curation Center in JAXA, we performed in…
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Aiko Nakato, Toru Yada, Masahiro Nishimura, Kasumi Yogata 等
2023-03-28
置信度 0.72
WeatheringSpace weatheringAsteroidSample (material)Mineral
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Steven Goderis, Bastien Soens, Matthew S. Huber, Seann McKibbin 等
2019-11-20
置信度 0.72
GeologySedimentary rockBedrockEjectaExtraterrestrial life