Results 121 to 130 of about 3,762 (245)

Origin, Tectonic Processes, and Metasomatism of Serpentinite in the Shimanto Accretionary Complex, SW Japan: Possible Diapiric Intrusion of Serpentinized Oceanic Lithosphere

Tectonics, Volume 45, Issue 7, July 2026.
Abstract Serpentinite plays a major role in the geodynamics of subduction zones. However, the processes by which serpentinite is incorporated into accretionary complexes, and the extent to which it interacts chemically and physically with accretionary lithologies, remain unclear.
Yusuke Shimura, Shunsuke Endo, Yoshihiro Asahara, Toshiki Haji, Kentaro Ushimaru, Koshi Yamamoto   +5 more
wiley   +1 more source

Mineralogical, Spectral, and Compositional Changes During Heating of Hydrous Carbonaceous Chondrites [PDF]

, 2017
Hydrous carbonaceous chondrites experienced hydration and subsequent dehydration by heating, which resulted in a variety of mineralogical and spectral features [e. g., 1-6].
Yamashita, S., Furukawa, Y., Nakata, A., Sato, Y., Matsuoka, M., Mogi, K., Okumura, S., Enokido, Y., Nakamura, T., Zolensky, M.   +9 more
core   +1 more source

Mid-infrared Measurements of Ion-irradiated Carbonaceous Meteorites: How to Better Detect Space Weathering Effects

The Planetary Science Journal
Remote sensing study of asteroids will soon enter a new era with an increasing amount of data available thanks to the JWST, especially in the mid-infrared (MIR) range that allows identification of mineral species.
C. Lantz, T. Nakamura, D. Baklouti, R. Brunetto, E. Henault, S. Kobayashi, O. Mivumbi, Z. Djouadi, E. Quirico, M. Zolensky, T. Hiroi   +10 more
doaj   +1 more source

Late Campanian (74–71 Ma) Arabia–Eastern Anatolia Collision and Its Geodynamic Implications

Tectonics, Volume 45, Issue 7, July 2026.
Abstract The East Anatolian Plateau is a major collisional feature within the Tethyan realm formed as a late‐stage result of the collision between East Anatolia and the Arabian Platform. The timing of this collision is highly debated, with estimates from the Late Cretaceous to the Miocene.
Remziye Akdoğan, Xiumian Hu, Gültekin Topuz, Aynur Hakyemez, Rita Catanzariti, Anlin Ma, Yalçın E. Ersoy, İbrahim Uysal   +7 more
wiley   +1 more source

Pyrolysis-GC×GC-TOFMS to characterize carbonaceous chondrites [PDF]

, 2005
Using pyrolysis-GCxGC-TOFMS to analyze organic carbon in carbonaceous chondrites gives a massive increase in both sensitivity and structural information from samples when compared to traditional Py-GC ...
Watson, J. S., Gilmour, I., Perkins, R., Pillinger, C. T., Morgan, G. H., Pearson, V. K., Turner, D.   +6 more
core  

Volatile Element Depletion of Carbonaceous Chondrites—Insights from Mass-dependent Zinc, Cadmium, and Tellurium Isotope Variations

The Astrophysical Journal
The origin of volatile depletion in the solar system remains a topic of intense debate. To further inform our understanding of the mechanisms involved, this study characterized the mass-dependent Zn, Cd, and Te isotope compositions and concentrations of ...
Elin M. Morton, Harvey Pickard, Frank Wombacher, Yihang Huang, Emeliana Palk, Rayssa Martins, Sven Kuthning, Maria Schönbächler, Mark Rehkämper   +8 more
doaj   +1 more source

Occurrence and Provenance of KREEP Components in Glassy Agglutinates From Chang'e‐5 Lunar Regolith

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract This study investigates the petrogenesis of glassy agglutinates in a polished section of the Chang'e‐5 lunar regolith sample CE5C0800YJYX018GP through integrated petrographic, mineralogical, and geochemical analyses of four representative particles (18GP‐01 to 18GP‐04).
Shuai Ma, Zhipeng Xia, Bingkui Miao
wiley   +1 more source

Osmium Isotope and Highly Siderophile Element Constraints on the Cretaceous/Paleogene Boundary in Western Pacific Pelagic Clay

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract The Cretaceous/Paleogene (K/Pg) Chicxulub impact produced globally synchronous enrichments of highly siderophile elements (HSEs) and a pronounced decline in marine osmium isotope ratios (187Os/188Os), forming a key geochemical marker of the boundary.
Honami Sato, Yoichi Usui, Kazuhide Mimura, Akira Ishikawa, Kazutaka Yasukawa, Junichiro Ohta, Yasuhiro Kato   +6 more
wiley   +1 more source

Spectral Similarity in the Thermal Infrared between Sulfide-rich Carbonaceous Chondrite Meteorites, Jupiter Trojans, and Other D- and P-type Asteroids

The Planetary Science Journal
Carbonaceous chondrite meteorites, which include the sulfide-rich “Yamato-type” chondrites (CYs), have undergone a complex history of aqueous and thermal alteration and offer crucial insights into early outer solar system conditions.
Helena C. Bates, Ashley J. King, Kerri L. Donaldson Hanna, Audrey C. Martin, Joshua P. Emery, Neil E. Bowles, Sara S. Russell   +6 more
doaj   +1 more source

Cosmic Dust Flux During the Quaternary: The Record of Large Scoriaceous and Unmelted Micrometeorites From the Transantarctic Mountains Collection

Journal of Geophysical Research: Planets, Volume 131, Issue 7, July 2026.
Abstract We estimate the cosmic dust flux to Earth through the study of rare micrometeorites that preserve part of their precursor features during atmospheric entry heating, namely unmelted and scoriaceous subtypes. Combining high‐precision mass balance measurements, X‐ray computed microtomography and scanning electron microscopy, we studied mass, size
S. Ottaviani, L. Folco, M. D. Suttle, R. Repič, L. Mancini, T. Battiston, S. Iannini Lelarge, M. Masotta   +7 more
wiley   +1 more source