Results 41 to 50 of about 43,126 (119)

New Constraints on the Onset of Antarctic Glaciation From Combined Radiogenic Hafnium and Neodymium Isotopes

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract The drawdown of atmospheric CO2 likely triggered Antarctic glaciation during the Eocene‐Oligocene Transition (34 Ma). Accurately constraining this shift from “greenhouse” to an “icehouse” climate is essential for understanding global carbon cycle dynamics.
Keehwan Lee, Franco Marcantonio, Michael Bizimis, Howie D. Scher, Brian W. Romans, Lucien Nana Yobo   +5 more
wiley   +1 more source

FT-IR spectroscopic studies of major organic matter in carbonaceous chondrites using microscopic technique and comparison with terrestrial kerogen [PDF]

, 1994
P(論文)Infrared (IR) absorption spectra of major types of carbonaceous matter in four Antarctic carbonaceous chondrites (Y-74662,Y-791198,ALH-77307,Y-791717) and two non-Antarctic carbonaceous chondrites (Murchison, Allende) were taken using a microscopic ...
Murae, Tatsushi
core   +1 more source

Life on Mars? The physiological perspective

Experimental Physiology, EarlyView.
Ronan M. G. Berg, Damian M. Bailey
wiley   +1 more source

Replication Data for: The Loongana (CL) group of carbonaceous chondrites

A coordinated study of the petrology, mineral chemistry, and bulk chemical and isotopic composition of the five ungrouped carbonaceous chondrites Coolidge, Loongana 001, Los Vientos (LoV) 051, Northwest Africa (NWA) 033, and NWA 13400 reveals that these ...
Schneider, Jonas M., Metzler, Knut, Wölfer, Elias, Barosch, Jens, Hezel, Dominik C.   +4 more
core   +1 more source

Infrared spectroscopic taxonomy for carbonaceous chondrites from speciation of hydrous components

, 2005
Mid-infrared absorption spectra for all types of carbonaceous chondrites were obtained in this study to establish a versatile method for spectroscopic classification of carbonaceous chondrites.
Kagi, H., Noguchi, T., Osawa, T., Nakamura, T.   +3 more
core   +2 more sources

Aqueous breakdown of aspartate and glutamate to n-ω-amino acids on the parent bodies of carbonaceous chondrites and asteroid Ryugu. [PDF]

Sci Adv, 2023
Li Y, Kurokawa H, Sekine Y, Kebukawa Y, Nakano Y, Kitadai N, Zhang N, Zang X, Ueno Y, Fujimori G, Nakamura R, Fujishima K, Isa J.   +12 more
europepmc   +1 more source

Petrology of Amoeboid Olivine Aggregates in Antarctic CR Chondrites: Comparison With Other Carbonaceous Chondrites [PDF]

, 2016
Amoeboid olivine aggregates (AOAs) are important refractory components of carbonaceous chondrites and have been interpreted to represent solar nebular condensates that experienced high-temperature annealing, but largely escaped melting.
Komatsu, M., Fagan, T. J., Zolensky, M. E., Yamaguchi, A., Yasutake, M., Mikouchi, T.   +5 more
core  

Volatile element depletion in Earth and carbonaceous chondrites [PDF]

, 2019
Volatile elements such as sulfur, zinc, indium and potassium are depleted relative to the Sun in all known inner solar system materials, including Earth, Mars, Moon and differentiated and undifferentiated meteorites.
Braukmüller, Ninja
core   +1 more source

Speciation of organosulfur compounds in carbonaceous chondrites. [PDF]

Sci Rep, 2021
Zherebker A, Kostyukevich Y, Volkov DS, Chumakov RG, Friederici L, Rüger CP, Kononikhin A, Kharybin O, Korochantsev A, Zimmermann R, Perminova IV, Nikolaev E.   +11 more
europepmc   +1 more source

Metal compositions of carbonaceous chondrites

, 2022
FeNi metals represent an important fraction of chondritic components that remains relatively unexplored within most carbonaceous chondrite groups. The compositions of these metals can place constraints on the nature of their precursor materials as well ...
Elishevah M.M.E. van Kooten, Tonny B. Thomsen, Heredia, Benjamin D., Frédéric Moynier, Thomsen, Tonny B., Moynier, Frédéric, Edith Kubik, van Kooten, Elishevah M. M. E., Kubik, Edith, Julien Siebert, van Kooten, Elishevah, Sieberte, Julien, Benjamin D. Heredia, Siebert, Julien   +13 more
core   +1 more source