Results 41 to 50 of about 11,238 (241)

The Nysa family as the main source of unequilibrated LL ordinary chondrites

Astronomy & Astrophysics
Context. The origin of the petrologic diversity observed in ordinary chondrites (OCs), the most common meteorites on Earth, remains debated. Competing models invoke either depth-dependent sampling of a single thermally stratified (‘onion-shell’) parent ...
Marsset M., Vernazza P., Brož M., Avdellidou C., Thomas C. A., McGraw L., Madden-Watson A., Minker K., Monnereau M., DeMeo F. E., Binzel R. P., Mahlke M., Carry B., Hanuš J., Simon P. N., Yang B., Beck P., Birlan M., Jehin E.   +18 more
doaj   +1 more source

A Reassessment of Petrochemistry of ~1.2 Ga Tonalitic Rocks of the Northern Tugela Terrane, Natal Metamorphic Belt, South Africa: Further Constraints on the Evolution of This Belt

Geological Journal, EarlyView.
Our petrochemical studies on ~1.2 Ga granitoids of the Natal Metamorphic Belt, South Africa, do not suggest any property similar to Phanerozoic‐style subduction‐related granitoids. Plot of Kotongweni Tonalite in Y versus Sr diagram (after Moyen 2011), note that most samples have Sr/Y < 50.
Palesa Leuta, Saumitra Misra, Thembiso O. Basupi   +2 more
wiley   +1 more source

Classification of several Yamato-75 chondrites (III) [PDF]

, 1981
P(論文)All the chondrites from the Yamato-75108 to -75257 have been considered to be originally one single body of meteorite which was broken into many fragments during its passage through the atmosphere.
Matsumoto, Yukio, Miura, Yasunori
core   +1 more source

Organic and volatile elements in the solar system

EPJ Web of Conferences, 2012
Chondrites and comets have accreted primitive materials from the early solar system. Those materials include organics, water and other volatile components.
Remusat L.
doaj   +1 more source

Stellar Outbursts and Chondrite Composition

The Astrophysical Journal, 2023
The temperatures of observed protoplanetary disks are not sufficiently high to produce the accretion rate needed to form stars, nor are they sufficient to explain the volatile depletion patterns in CM, CO, and CV chondrites and terrestrial planets.
Min Li, Zhaohuan Zhu, Shichun Huang, Ning Sui, Michail I. Petaev, Jason H. Steffen   +5 more
doaj   +1 more source

Apatite in Carbonatite Preserving Primary Magmatic, Post‐Magmatic Overgrowth, and Post India‐Asia Collision‐Related Hydrothermal Alteration: Evidenced From U–Pb Isotope and Trace Element Geochemistry

Geological Journal, EarlyView.
U–Pb isotope and trace element geochemistry of apatite from carbonatites of Peshawar Plain Alkaline Igneous Province, western Himalaya shows Permo‐Carboniferous magmatism, an additional magmatic pulse during Cretaceous, and post‐magmatic hydrothermal/metasomatism during Oligocene. ABSTRACT U–Pb isotope and trace element geochemistry of apatite combined
Mehboob ur Rashid, Hafiz U. Rehman, Hao‐Yang Lee, Sun‐Lin Chung, Kaushik Das, Kazumasa Aoki, Muhammad Jawad Zeb, Nasir Ahmad, Muhammad Hussain, Hiroshi Yamamoto   +9 more
wiley   +1 more source

A hydrogen isotope study of CO3 type carbonaceous chondrites; comparison with type 3 ordinary chondrites [PDF]

, 1993
Meteorites of the Ornans type 3 carbonaceous chondrites exhibit a range in degree of equilibration, attributed to differing amounts of thermal metamorphism.
Newton, J., Morse, A. D., Pillinger, C. T.   +2 more
core  

Neon produced by solar cosmic rays in ordinary chondrites [PDF]

, 2017
Solar-cosmic-ray-produced Ne (SCR-Ne), in the form of low cosmogenic ²¹Ne/²²Ne ratios (²¹Ne/²²Necos
Knut Metzler, Leya, Ingo, Reto Trappitsch, Ingo Leya, Roth, Antoine S. G., Antoine S. G. Roth, Metzler, Knut, Trappitsch, Reto, Beda A. Hofmann, Hofmann, Beda A.   +9 more
core   +1 more source

The Mobility of Major and Trace Elements in EOC Minerals on Parent Chondrite Bodies

Geosciences
The combined EPMA and SIMS study of the geochemical features of olivine, low-Ca pyroxene and plagioclase in equilibrated ordinary chondrites (EOCs) has revealed the effect of thermal metamorphism on trace element concentrations in EOC silicate minerals ...
Kristina Sukhanova, Sergey Skublov
doaj   +1 more source

Origin of Isotopic Diversity among Carbonaceous Chondrites

The Astrophysical Journal Letters, 2023
Carbonaceous chondrites are some of the most primitive meteorites and derive from planetesimals that formed a few million years after the beginning of the solar system.
Jan L. Hellmann, Jonas M. Schneider, Elias Wölfer, Joanna Drążkowska, Christian A. Jansen, Timo Hopp, Christoph Burkhardt, Thorsten Kleine   +7 more
doaj   +1 more source