Results 51 to 60 of about 64,440 (194)

Protracted Timescales for Nebular Processing of First-formed Solids in the Solar System

The Astrophysical Journal, 2023
The calcium–aluminum-rich inclusions (CAIs) from chondritic meteorites are the first solids formed in the solar system. Rim formation around CAIs marks a time period in early solar system history when CAIs existed as free-floating objects and had not yet
Prajkta Mane, Maitrayee Bose, Meenakshi Wadhwa, Céline Defouilloy   +3 more
doaj   +1 more source

Simulated asteroid materials based on carbonaceous chondrite mineralogies

Meteoritics and Planetary Science, 2019
A set of high‐fidelity simulated asteroid materials, or simulants, was developed based on the mineralogy of carbonaceous chondrite meteorites. Three varieties of simulant were developed based on CI1 chondrites (typified by Orgueil), CM2 chondrites ...
D. Britt, K. Cannon, K. D. Donaldson Hanna, J. Hogancamp, O. Poch, P. Beck, Dayl Martin, J. Escrig, L. Bonal, P. Metzger   +9 more
semanticscholar   +1 more source

The Origins of I-type Spherules and the Atmospheric Entry of Iron Micrometeoroids. [PDF]

, 2016
The Earth's extraterrestrial dust flux includes a wide variety of dust particles that include FeNi metallic grains. During their atmospheric entry iron micrometeoroids melt and oxidize to form cosmic spherules termed I-type spherules. These particles are
Genge, MJ
core   +1 more source

An evaluation method of reflectance spectra to be obtained by Hayabusa2 Near-Infrared Spectrometer (NIRS3) based on laboratory measurements of carbonaceous chondrites

Earth, Planets and Space, 2017
We conducted ground-based performance evaluation tests of the Near-Infrared Spectrometer (NIRS3) onboard Hayabusa2 spacecraft in November 2013 and from April to May 2014 and established a method for evaluating its measured reflectance spectra ...
Moe Matsuoka, Tomoki Nakamura, Takahito Osawa, Takahiro Iwata, Kohei Kitazato, Masanao Abe, Yusuke Nakauchi, Takehiko Arai, Mutsumi Komatsu, Takahiro Hiroi, Naoya Imae, Akira Yamaguchi, Hideyasu Kojima   +12 more
doaj   +1 more source

The Compositional Structure of the Asteroid Belt

, 2015
The past decade has brought major improvements in large-scale asteroid discovery and characterization with over half a million known asteroids and over 100,000 with some measurement of physical characterization.
Alexander, Conel M. O'D., Binzel, Richard P., Chapman, Clark R., DeMeo, Francesca E., Walsh, Kevin J.   +4 more
core   +1 more source

Influence of Rare Earth Elements on Prebiotic Reaction Networks Resembling the Biologically Relevant Krebs Cycle

Angewandte Chemie International Edition, EarlyView.
Rare earth elements can act as mediators in a prebiotic reaction network, producing various intermediates of the citric acid cycle starting from glyoxylate and pyruvate. The ionic radius and the resulting variation in Lewis acidity has a significant influence on the observed product scope.
Jonathan Gutenthaler‐Tietze, Carolina G. Heßler, Lena J. Daumann   +2 more
wiley   +1 more source

Origins of the Pangkaimen Au Deposit in the Northern Great Xing'an Range, China: Evidence From Geochronological, Geochemical, Fluid Inclusion, and H–O–S–Pb Isotope Data

Geological Journal, EarlyView.
The Pangkaimen Au–Ag deposits belong to the epithermal Au deposits, which are of great significance for guiding the research and development of this type of gold deposit. Metallogenic model diagram of Pangkaimen Au–Ag deposit. ABSTRACT The gold (Au) metallogenic belt in the northern Great Xing'an Range is characterised by the wide occurrence of the ...
Sheng Lu, Hongpeng Chen, Chenglu Li, Ye Wang, Tiesheng Li, Rigen Wu, Zengtao Li, Zhichao Song, Xiannan Zhu   +8 more
wiley   +1 more source

Cometary micrometeorites and input of prebiotic compounds

BIO Web of Conferences, 2014
The apparition of life on the early Earth was probably favored by inputs of extraterrestrial matter brought by carbonaceous chondrite-like objects or cometary material. Interplanetary dust collected nowadays on Earth is related to carbonaceous chondrites
Engrand C.
doaj   +1 more source

Nanoscale Infrared Imaging Analysis of Carbonaceous Chondrites to Understand Organic-Mineral Interactions During Aqueous Alteration [PDF]

, 2019
Organic matter in carbonaceous chondrites is distributed in fine-grained matrix. To understand pre- and postaccretion history of organic matter and its association with surrounding minerals, microscopic techniques are mandatory.
Baden, Naoki, Kebukawa, Yoko, Kobayashi, Hanae, Kobayashi, Kensei, Kondo, Masashi, Urayama, Norio, Zolensky, Michael E.   +6 more
core   +2 more sources

The CM carbonaceous chondrite regolith Diepenveen

Meteoritics and Planetary Science, 2019
A carbonaceous chondrite was recovered immediately after the fall near the village of Diepenveen in the Netherlands on October 27, 1873, but came to light only in 2012.
M. Langbroek, P. Jenniskens, L. Kriegsman, H. Nieuwenhuis, Niek De Kort, J. Kuiper, W. van Westrenen, M. Zolensky, K. Ziegler, Q. Yin, M. Sanborn, J. Wimpenny, A. Yamakawa, Sebastiaan J. De Vet, M. Meier, K. Welten, K. Nishiizumi, M. Caffee, A. Burton, J. Dworkin, D. Glavin, Qinghao Wu, R. Zare, A. Ruf, M. Harir, P. Schmitt‐Kopplin   +25 more
semanticscholar   +1 more source