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Abstract The Whitecourt meteorite impact crater, Alberta, Canada is a rare example of a well‐preserved small impact structure, with which thousands of meteorite fragments are associated. As such, this crater represents a unique opportunity to investigate the e…
openalex
J. D. Newman, C. D. K. Herd
2015-02-01
置信度 0.72
GeologyMeteoriteImpact craterGeochemistryPetrology
-
Abstract— Due to their small size, the mineralogical and chemical properties of micrometeorites (MMs) are not representative of their parent bodies on the centimeter to meter scales that are used to define parent body groups through the petrological study of m…
openalex
M. J. Genge, C. Engrand, M. Gounelle, Susan Taylor
2008-03-01
置信度 0.72
MeteoriteClassification schemeParent bodyInterpretation (philosophy)Geology
-
openalex
Maggie McAdam, J. M. Sunshine, K. T. Howard, T. J. McCoy
2014-10-05
置信度 0.72
MeteoriteChondriteParent bodyAqueous solutionCarbonaceous chondrite
-
openalex
J. D. MacDougall
1979-01-01
置信度 0.72
Allende meteoriteMurchison meteoriteMeteoriteGeologyChondrite
-
openalex
Koeberl, Christian Christian, Kurat, Gero 等
1993-05-01
置信度 0.72
MeteoriteGeologyAstrobiologyAchondriteChondrite
-
Possible relic biogenic activity in martian meteorite ALH84001 was proposed by McKay et al. (Science, 273, 924-930, 1996). This ancient meteorite of 4.5 billion years old contains abundant carbonates as secondary minerals precipitated from a fluid on the marti…
openalex
Akira Tsuchiyama
1996-01-01
置信度 0.72
MartianMeteoriteAstrobiologyMars Exploration ProgramLife on Mars
-
A preliminary consortium examination of the largest lunar meteorite (Y-86032) recovered from the Yamato Mountains revealed that it is a feldspathic breccia, but rather resembles feldspathic fragmental breccias than regolith breccias. Y-86032 is a rugged grayis…
openalex
H. Takeda, Hideyasu Kojima, Fumihiko Nishio, Keizô Yanai 等
1989-10-01
置信度 0.72
PetrographyMeteoriteGeologyAstrobiologyChondrite
-
Abstract— Portales Valley (PV) is an unusual metal-veined meteorite that has been classified as an H6 chondrite. It has been regarded either as an annealed impact melt breccia, as a primitive achondrite, or as a meteorite with affinities to silicated iron mete…
openalex
A. Ruzicka, M. Killgore, David W. Mittlefehldt, M. Fries
2005-02-01
置信度 0.72
MeteoriteChondriteGeologyBrecciaAchondrite
-
Abstract Current thinking regarding the possible origins and probable evolutionary histories of meteorites is summarized. Selected data concerning the composition, petrology and other characteristics of the CI and CM groups of stony meteorites in which layered…
openalex
D. J. Barber
1985-12-01
置信度 0.72
MeteoriteChondriteAstrobiologyMineralGeology
-
Abstract— The objective of this study was to identify and map possible source regions for all 5 known martian meteorite lithologies (basalt, lherzolite, clinopyroxenite, orthopyroxenite, and dunite) using data from the Mars Global Surveyor Thermal Emission Spe…
openalex
V. E. Hamilton, P. R. Christensen, H. Y. McSween, J. L. Bandfield
2003-06-01
置信度 0.72
MeteoriteMartianMars Exploration ProgramGeologyAchondrite
-
Abstract— The recent discovery of the importance of Sun‐grazing phenomena dramatically changed our understanding of the dynamics of objects emerging from the asteroid belt via resonant phenomena. The typical lifetimes of such objects are now expected to be <10…
openalex
Alessandro Morbidelli, Brett Gladman
1998-09-01
置信度 0.72
MeteoriteMeteoroidAsteroid beltChondriteAchondrite
-
Short-lived radionuclides can be used as high-resolution chronometers for establishing timescales of planetary formation provided that they were homogeneously distributed in the accretion disk. However, isotopic anomalies observed in meteorites bear evidence o…
openalex
Anne Trinquier, Jean‐Louis Birck, Claude J. Allègre
2007-01-23
置信度 0.72
Formation and evolution of the Solar SystemChondriteMeteoriteAstrobiologySolar System
-
openalex
T. Kohout, Maria Gritsevich, V. I. Grokhovsky, G. A. Yakovlev 等
2013-10-03
置信度 0.72
MeteoriteChondriteSpace weatheringAsteroidGeology
-
Nucleosynthetic isotope anomalies are powerful tracers to determine the provenance of meteorites and their components, and to identify genetic links between these materials. Here we show that chondrules and matrix separated from the Allende CV3 chondrite have …
openalex
G. Budde, Christoph Burkhardt, G. A. Brennecka, Mario Fischer‐Gödde 等
2016-10-07
置信度 0.72
ChondruleMeteoriteFormation and evolution of the Solar SystemAllende meteoriteChondrite
-
openalex
S. K. Fieber-Beyer, M. J. Gaffey, P. S. Hardersen, V. Reddy
2012-08-07
置信度 0.72
AsteroidMeteoriteMeteoroidFormation and evolution of the Solar SystemSolar System
-
openalex
Jon M. Friedrich, Michael K. Weisberg, Denton S. Ebel, Alison E. Biltz 等
2014-09-20
置信度 0.72
ChondruleMeteoriteChondriteAstrobiologyGeology
-
The origin and evolution of the solar system are analyzed. Physical processes are first discussed, followed by experimental studies of plasma-solid reactions and chemical and mineralogical analyses of meteorites and lunar and terrestrial samples.
openalex
Hannes Alfvén, Gustaf Arrhenius
1976-01-01
置信度 0.72
AstrobiologyMeteoriteSolar SystemFormation and evolution of the Solar SystemEarth science
-
Chemical and mineralogical composition of roedderite found in Indarch meteorite, presenting electron probe analysis and X-ray diffraction pattern optical data
openalex
C. Frondel, C. Klein
1966-07-01
置信度 0.72
MeteoriteMineralGeologyGeochemistryAstrobiology
-
openalex
J. C. Laul, R. Ganapathy, Edward Anders, John W. Morgan
1973-02-01
置信度 0.72
ChondriteMeteoriteEnstatiteChondruleGeology
-
openalex
Koeberl, Christian Christian, Kurat, Gero 等
1990-10-01
置信度 0.72
MeteoriteGeologyGeochemistryAstrobiologyAchondrite
-
Topics addressed include: Cretaceous-Tertiary mass extinctions; geologial indicators for meteorite collisions; carbon dioxide catastrophes; volcanism; climatic changes; geochemistry; mineralogy; fossil records; biospheric traumas; stratigraphy; mathematical mo…
openalex
V. L. Sharpton, Peter D. Ward
1990-01-01
置信度 0.72
VolcanismHistoryEarth (classical element)Earth scienceGeology
-
Abstract The Dawn spacecraft mission has provided extensive new and detailed data on Vesta that confirm and strengthen the Vesta–howardite–eucrite–diogenite (HED) meteorite link and the concept that Vesta is differentiated, as derived from earlier telescopic o…
openalex
M. C. De Sanctis, E. Ammannito, M. T. Capria, F. Capaccioni 等
2013-07-08
置信度 0.72
MeteoriteAsteroidChondriteAstrobiologyBasalt
-
A New Dawn Since 17 July 2011, NASA's spacecraft Dawn has been orbiting the asteroid Vesta—the second most massive and the third largest asteroid in the solar system (see the cover). Russell et al. (p. 684 ) use Dawn's observations to confirm that Vesta is a s…
openalex
C. T. Russell, C. A. Raymond, A. Coradini, H. Y. McSween 等
2012-05-10
置信度 0.72
MeteoriteAsteroidAstrobiologyParent bodyGeology
-
ADVERTISEMENT RETURN TO ISSUECenter StageNEXTA Conversation with Julie CosmidisThe University of Oxford geomicrobiologist discusses how chemistry can create false signs of life.Carolyn WilkeCarolyn WilkeMore by Carolyn WilkeCite this: ACS Cent. Sci. 2022, 8, 9…
europepmc
2022
置信度 0.80
-
Ionizing radiation is one of the main factors limiting the survival of microorganisms in extraterrestrial conditions. The survivability of microorganisms under irradiation depends significantly on the conditions, in which the irradiation occurs. In particular,…
europepmc
2021
置信度 0.80
-
Irradiation structural damage (e.g., radiation tracks, amorphous layers, and vesicles) is widely observed in lunar soil grains. Previous experiments have revealed that irradiation damage is caused by the injection of solar wind and solar flare energetic partic…
europepmc
2022
置信度 0.80
-
Hydrothermal systems are areas in which heated fluids and organic molecules rush through basaltic material rich in metals and minerals. By studying malononitrile and acetonitrile, we examine the effects of metal and mineral nanoparticles on nitrile compounds i…
europepmc
2023
置信度 0.80
-
Microbial activity has shaped the evolution of the ocean and atmosphere throughout the Earth history. Thus, experimental simulations of microbial metabolism under the environment conditions of the early Earth can provide vital information regarding biogeochemi…
europepmc
2022
置信度 0.80
-
Life thrives in Earth's most inhospitable environments, from boiling hydrothermal vents to hypersaline lakes and frozen polar deserts, thanks to the remarkable adaptations of extremophilic microorganisms. The study of these organisms has rapidly evolved from e…
europepmc
2026
置信度 0.80
-
Eighty years ago, Nobel Prize-winner physicist Erwin Schrödinger gave three lectures in Dublin's Trinity College, titled What is Life? The physical aspect of the living cell to explain life in terms of the chemistry and physics laws. Life definitions rely on t…
europepmc
2022
置信度 0.80
-
Background Exploration of subsurface gases such as hydrogen, helium, methane, and carbon dioxide can be achieved by integration of geological framework, hydrogeochemistry, and isotope analysis to understand generation, migration, and trapping mechanisms. A foc…
europepmc
2025
置信度 0.80
-
Near infrared (NIR) remote sensing has applications in vegetation analysis as well as geological investigations. For extra-terrestrial applications, this is particularly relevant to Moon, Mars and asteroid exploration, where minerals exhibiting spectral phenom…
europepmc
2021
置信度 0.80
-
Planetary caves are desirable environments for the search for biosignatures corresponding to extant or extinct extraterrestrial life due to the protection they offer from surface-level solar radiation and ionizing particles. Near-infrared (NIR) reflectance spe…
europepmc
2023
置信度 0.80
-
After 70 years of development, magnetotelluric (MT), a remote sensing technique for subsurface electrical resistivity imaging, has been widely applied in resource exploration and the deep tectonic evolution of the Earth. The electrical resistivity anomalies an…
europepmc
Wule Lin, Bo Yang, Bo Han, Xiangyun Hu
2023
置信度 0.80
MagnetotelluricsElectrical resistivity and conductivityGeologyTectonicsCrust
-
The universe is a complex fabric of repeating patterns that unfold their beauty in system-specific diversity. The periodic table, crystallography, and the genetic code are classic examples that illustrate how even a small number of rules generate a vast range …
europepmc
2024
置信度 0.80
-
Mechanochemistry has attracted significant attention as a sustainable and efficient alternative to solution-based synthesis, offering the advantage of solvent-free conditions or the use of only minor amounts of solvent. Many established mechanochemical transfo…
europepmc
2026
置信度 0.80
-
A group of researchers from the humanities, economics, social sciences, natural and life science developed a definition of the topics complexity and emergence that can be applied across disciplines. Here, concepts of complexity and emergence in chemistry and b…
europepmc
2026
置信度 0.80
-
The shockwave produced alongside the plasma during a laser-induced breakdown spectroscopy event can be recorded as an acoustic pressure wave to obtain information related to the physical traits of the inspected sample. In the present work, a mid-level fusion a…
europepmc
2022
置信度 0.80
-
We are developing an in situ, rock-dating spectrometer for spaceflight called the Chemistry, Organics, and Dating EXperiment (CODEX). CODEX will measure Rb-Sr compositions and determine ages of samples on the Moon or Mars and can be augmented to obtain Pb-Pb a…
europepmc
2020
置信度 0.80
-
Geopolymer is a synthetic amorphous aluminosilicate material that can be used as an inorganic binder to replace ordinary Portland cement. Geopolymer is produced by mixing aluminosilicate source materials with alkali activators and curing the mixture either at …
europepmc
Sujeong Lee, Arie van Riessen
2022
置信度 0.80
GeopolymerRegolithAluminosilicateMaterials scienceAstrobiology
-
The success of an astrobiological search for life campaign on Mars, or other planetary bodies in the Solar System, relies on the detectability of past or present microbial life traces, namely, biosignatures. Spectroscopic methods require little or no sample pr…
europepmc
2021
置信度 0.80
-
Rocks that react with liquid water are widespread but spatiotemporally limited throughout the solar system, except for Earth. Rock-forming minerals with high iron content and accessory minerals with high amounts of radioactive elements are essential to support…
europepmc
2021
置信度 0.80
-
Inhospitable, inaccessible, and extremely remote alike the famed pole of inaccessibility, aka Point Nemo, the isolated locations in deserts, at sea, or in outer space are difficult for humans to settle, let alone to thrive in. Yet, they present a unique set of…
europepmc
2024
置信度 0.80
-
The growing use of photosynthetic microorganisms for food and food-related applications is driving related biotechnology research forward. Increasing consumer acceptance, high sustainability, demand of eco-friendly sources for food, and considerable global eco…
europepmc
Giovanni Davide Barone, Tomislav Cernava, Jörg Ullmann, Jing Liu 等
2023
置信度 0.80
BiotechnologyMicroorganismSustainabilityBusinessNutrient
-
The oldest putative fossils occur as hematite filaments and tubes in jasper-carbonate banded iron formations from the 4280- to 3750-Ma Nuvvuagittuq Supracrustal Belt, Québec. If biological in origin, these filaments might have affinities with modern descendant…
europepmc
2022
置信度 0.80
-
Laboratory simulation is the only feasible way to achieve Martian environmental conditions on Earth, establishing a key link between the laboratory and Mars exploration. The mineral phases of some Martian surface materials (especially hydrated minerals), as we…
europepmc
2021
置信度 0.80
-
Robust methods for the characterisation of microbial biosignatures in geological matrices is critical for developing mineralogical biosignatures. Studying microbial fossils is fundamental for our understanding of the role microorganisms have played in elementa…
europepmc
2020
置信度 0.80
-
Exploring austere environments required a reimagining of resource acquisition and utilization. Cyanobacterial in situ resources utilization (ISRU) and biological life support system (BLSS) bioreactors have been proposed to allow crewed space missions to extend…
europepmc
2023
置信度 0.80
-
The icy satellites of Jupiter and Saturn are perhaps the most promising places in the Solar System regarding habitability. However, the potential habitable environments are hidden underneath km-thick ice shells. The discovery of Enceladus' plume by the Cassini…
europepmc
2020
置信度 0.80
-
As the exploration of Mars and other worlds for signs of life has increased, the need for a common nomenclature and consensus has become significantly important for proper identification of nonterrestrial/non-Earth biology, biogenic structures, and chemical pr…
europepmc
2021
置信度 0.80
-
Organics are observed to be a significant component of cosmic dust in nearly all environments were dust is observed. In many cases only remote telescope observations of these materials are obtainable and our knowledge of the nature of these materials is very b…
europepmc
2016
置信度 0.80
-
Acidophiles are capable of surviving in extreme environments with low pH. Acidithiobacillus ferrooxidans is a typical acidophilic bacterium that has been extensively studied when grown chemoautotrophically, i.e., when it derives energy from oxidation of Fe 2+ …
europepmc
2024
置信度 0.80
-
We review the in situ geochronology experiments conducted by the Mars Science Laboratory mission's Curiosity rover to understand when the Gale Crater rocks formed, underwent alteration, and became exposed to cosmogenic radiation. These experiments determined t…
europepmc
2019
置信度 0.80
-
Microorganisms, in the most hyperarid deserts around the world, inhabit the inside of rocks as a survival strategy. Water is essential for life, and the ability of a rock substrate to retain water is essential for its habitability. Here we report the mechanism…
europepmc
2020
置信度 0.80
-
The Younger Dryas (YD) abrupt cooling event ca. 12.9 ± 0.1 ka is associated with substantial meltwater input into the North Atlantic Ocean, reversing deglacial warming. One controversial and prevailing hypothesis is that a bolide impact or airburst is responsi…
europepmc
2020
置信度 0.80
-
Nutrient foraging by fungi weathers rocks by mechanical and biochemical processes. Distinguishing fungal-driven transformation from abiotic mechanisms in soil remains a challenge due to complexities within natural field environments. We examined the role of fu…
europepmc
2022
置信度 0.80
-
There are two types of rogue planets, sub-brown dwarfs and "rocky" rogue planets. Sub-brown dwarfs are unlikely to be habitable or even host life, but rocky rogue planets may have a liquid ocean under a thick atmosphere or an ice layer. If they are overlain by…
europepmc
2021
置信度 0.80
-
The deep bedrock surroundings are an analog for extraterrestrial habitats for life. In this study, we investigated microbial life within anoxic ultradeep boreholes in Precambrian bedrock, including the adaptation to environmental conditions and lifestyle of th…
europepmc
2020
置信度 0.80
-
The ecological relationship between minerals and microorganisms arguably represents one of the most important associations in dry terrestrial environments, since it strongly influences major biochemical cycles and regulates the productivity and stability of th…
europepmc
2019
置信度 0.80
-
There is an estimated chance of 0.037% that asteroid Bennu will collide with Earth in 2182 CE. The potential collision of such medium-sized asteroids can inject massive amounts of dust into the atmosphere, with unknown consequences for terrestrial and marine e…
europepmc
2025
置信度 0.80
-
Secondary Ion Mass Spectrometry (SIMS) is an outstanding technique for Mass Spectral Imaging (MSI) due to its notable advantages, including high sensitivity, selectivity, and high dynamic range. As a result, SIMS has been employed across many domains of scienc…
europepmc
Yanjie Shen, Logan Howard, Xiao‐Ying Yu
2024
置信度 0.80
Secondary ion mass spectrometryCharacterization (materials science)MicroanalysisStatic secondary-ion mass spectrometryMaterials science
-
Phosphorous-containing molecules have a great relevance in prebiotic chemistry in view of the fact that phosphorous is a fundamental constituent of biomolecules, such as RNA, DNA, and ATP. Its biogenic importance has led astrochemists to investigate the possib…
europepmc
2022
置信度 0.80
-
Life in environments devoid of photosynthesis, such as on early Earth or in contemporary dark subsurface ecosystems, is supported by chemical energy. How, when, and where chemical nutrients released from the geosphere fuel chemosynthetic biospheres is fundamen…
europepmc
2021
置信度 0.80
-
Many interpretations have been proposed to explain the presence of jarosite within Martian surficial sediments, including the possibility that it precipitated within paleo-ice deposits owing to englacial weathering of dust. However, until now a similar geochem…
europepmc
2021
置信度 0.80
-
Carotenoids are promising targets in our quest to search for life on Mars due to their biogenic origin and easy detection by Raman spectroscopy, especially with a 532 nm excitation thanks to resonance effects. Ionizing radiations reaching the surface and subsu…
europepmc
2020
置信度 0.80
-
Space is a complex and challenging setting encompassing the region beyond Earth's atmosphere where astronauts and spacecraft operate. The unique conditions of spaceflights, particularly microgravity and radiation, pose significant challenges to astronaut healt…
europepmc
2023
置信度 0.80
-
Large airbursts, the most frequent hazardous impact events, are estimated to occur orders of magnitude more frequently than crater-forming impacts. However, finding traces of these events is impeded by the difficulty of identifying them in the recent geologica…
europepmc
2021
置信度 0.80
-
The extreme environmental conditions and lack of water on the soil surface in hyperarid deserts hamper microbial life, allowing only highly specialized microbial communities to the establish colonies and survive. Until now, the microbial communities that inhab…
europepmc
2021
置信度 0.80
-
Redox-driven biogeochemical cycling of iron plays an integral role in the complex process network of ecosystems, such as carbon cycling, the fate of nutrients and greenhouse gas emissions. We investigate Fe-(hydr)oxide (trans)formation pathways from rhyolitic …
europepmc
2023
置信度 0.80
-
Abstract— Meteor Crater is one of the first impact structures systematically studied on Earth. Its location in arid northern Arizona has been ideal for the preservation of the structure and the surviving meteoric material. The recovery of a large amount of met…
openalex
N. A. Artemieva, E. Pierazzo
2009-01-01
置信度 0.72
Impact craterMeteoroidProjectileGeologyCanyon
-
Here, we report on a kinetically controlled vapour phase condensation experiment using a low-calcium Ca–Fe–SiO–H2–O2 vapour. Under these conditions of extreme disequilibrium, the condensate properties become predictable. They are amorphous solids with (predict…
openalex
Frans J. M. Rietmeijer, A. Pun, Joseph A. Nuth
2009-04-24
置信度 0.72
Eutectic systemMetastabilityAmorphous solidCondensationSilicate
-
Abstract— The Chesapeake Bay impact structure, which is about 35 Ma old, has previously been proposed as the possible source crater of the North American tektites (NAT). Here we report major and trace element data as well as the first Sr-Nd isotope data for dr…
openalex
A. Deutsch, Christian Koeberl
2006-05-01
置信度 0.72
GeologyImpact craterBrecciaImpact structureGeochemistry
-
Abstract— Three samples of Muong Nong tektites have been studied for N and noble gases. The isotopic composition of noble gases is airlike. The noble gas amounts are much higher in Muong Nong tektites than in splash‐form tektites. As compared to air, He and Ne…
openalex
S. V. S. Murty
1997-09-01
置信度 0.72
Noble gasNitrogenSedimentary rockGeochemistryChemistry
-
openalex
Xue Chen, Dan Zhang, Steven L. Larson, John H. Ballard 等
2021-06-24
置信度 0.72
Biogeochemical cycleEnvironmental chemistryBiomineralizationEnvironmental remediationExtracellular polymeric substance
-
Abstract— We report a high‐resolution 40Ar‐39Ar study of mineral separates and whole‐rock samples of olivine‐phyric (Dhofar 019, Sayh al Uhaymir [SaU] 005) and basaltic (Shergotty, Zagami) shergottites. Excess argon is present in all samples. The highest (40Ar…
openalex
E. V. Korochantseva, M. Trieloff, А. И. Буйкин, J. Hopp
2009-02-01
置信度 0.72
GeologyMartianArgonMantle (geology)Geochemistry
-
Microfluidic chips applied to the investigation of chirality allow reaction, separation and analysis of minuscule amounts of enantiomeric molecules. Chiral chip technology is employed in fields as diverse as pharmaceutical high throughput screening and deep sp…
openalex
Stefan Nagl, Philipp Schulze, Stefan Ohla, Reinhild Beyreiß 等
2011-03-28
置信度 0.72
Chirality (physics)ChemistryMicrofluidicsNanotechnologyMicrofluidic chip
-
Plant growth-promoting bacteria are one of the most interesting methods of controlling fungal phytopathogens. These bacteria can participate in biocontrol via a variety of mechanisms including lipopeptide production, hydrolytic enzymes (e.g., chitinase, cellul…
openalex
Jakub Dobrzyński, Zuzanna Jakubowska, Iryna Kulkova, Paweł Kowalczyk 等
2023-07-25
置信度 0.72
Bacillus pumilusBiologyRhizoctonia solaniMicrobiologyFusarium oxysporum
-
Abstract The primary aim of this review is to highlight that sea-ice microbes would be capable of occupying ice-associated biological niches on Europa and Enceladus. These moons are compelling targets for astrobiological exploration because of the inferred pre…
openalex
Andrew Martin, Andrew McMinn
2017-02-10
置信度 0.72
EnceladusAstrobiologyHabitabilityBiosphereEcosystem
-
Abstract Fe‐Ni metal is a common constituent of most meteorites and is an indicator of the thermal history of the respective meteorites, it is a diagnostic tool to distinguish between groups/subgroups of meteorites. In spite of over a million micrometeorites c…
openalex
M. Shyam Prasad, N. G. Rudraswami, Agnelo Alexandre de Araujo, V. D. Khedekar
2017-04-04
置信度 0.72
MeteoriteKamaciteAstrobiologyParent bodyGeology
-
Abstract– Xenoliths are inclusions of a given meteorite group embedded in host meteorites of a different group. Xenoliths with dimensions between a few μm and about 1 mm (microxenoliths) are “meteorite‐trapped” analogues of micrometeorites collected on the Ear…
openalex
G. Briani, M. Gounelle, M. Bourot-Denise, M. E. Zolensky
2012-05-01
置信度 0.72
MeteoriteXenolithChondriteZodiacal lightRegolith
-
Abstract The Scaglia limestone in the Umbria‐Marche Apennines, well‐exposed in the Gubbio area, offered an unusual opportunity to stratigraphers. It is a deep‐water limestone carrying an unparalleled historical record of the Late Cretaceous and Palaeogene, und…
openalex
Walter Álvarez
2008-11-20
置信度 0.72
GeologyPaleontologyCretaceousForaminiferaPelagic sediment
-
Abstract Tuite is a high‐pressure γ‐form of Ca3(PO4)2. An occurrence of tuite partly transformed from merrillite and chlorapatite was observed in the chondritic area adjacent to the shock veins in the Suizhou meteorite. Tuite grains are found in contact with b…
openalex
Xiande Xie, Xiangping Gu, Ming Chen
2015-12-07
置信度 0.72
Transformation (genetics)Phase (matter)ChemistryThermal shockMeteorite
-
Abstract— We report measurements of isotopic ratios of C, N, Mg, Si, Ca, Ti, Cr, and Fe in bulk samples (aggregates of many grains) of up to seven different fractions of silicon carbide (SiC), ranging from 0.38 to 3.0μm in diameter, from the Murchison CM2 carb…
openalex
S. Amari, E. Zinner, R. S. Lewis
2000-09-01
置信度 0.72
Murchison meteoritePresolar grainsChondriteMeteoriteGrain size
-
Abstract Shock amorphization of plagioclase, from partial to complete, has been used to evaluate the degree of shock in meteorites. Important information on the shock amplitude can be derived from the measurement of the refractive index in plagioclase, either …
openalex
Lidia Pittarello, J. Fritz, J. Roszjar, Christoph Lenz 等
2020-02-05
置信度 0.72
PlagioclaseMeteoriteMaterials scienceMineralogyOlivine
-
crossref
Trevor Valentine
2026-06-10T18:53:22Z
置信度 0.70
-
As space systems mature, and human exploration and exploitation of resources like the Moon, and in time, more distant planets, soon become routine, this could attract attentions of other space faring, intelligent life. Consequently, the need to develop trust-b…
crossref
Joseph R. Herdy
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置信度 0.70
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definitive Version of Record; we are providing this early version to give early visibility of the article.
openalex
Zengqian Hou, Yuming Wang
2026-08-01
置信度 0.72
AstrobiologyExtraterrestrial lifePlanetary habitabilitySearch for extraterrestrial intelligenceGeology
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crossref
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置信度 0.70
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