Results 21 to 30 of about 3,317 (166)
Swiss Journal of Geosciences, 2023 The ~ 10 km2 strewn field of the Twannberg type IIG iron meteorite is located in the Swiss Jura Mountains, 30 km northwest of Bern. The strewn field has been mapped by a group of citizen scientists since 2006, yielding more than 2000 meteorite fragments ...
Beda A. Hofmann +6 more
doaj +1 more source
Occurrence and Provenance of KREEP Components in Glassy Agglutinates From Chang'e‐5 Lunar Regolith
Geochemistry, Geophysics, GeosystemsThis 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‐
Shuai Ma, Zhipeng Xia, Bingkui Miao
doaj +1 more source
Nature Communications, 2020 This manuscript tackles the origin of organic molecules in carbonaceous meteorites. Identifying hexamethylenetetramine in three carbonaceous meteorites, the authors propose formation from ammonia and formaldehyde by photochemical and thermal reactions in
Yasuhiro Oba +6 more
doaj +1 more source
Variations in the Magnetic Properties of Meteoritic Cloudy Zone
Geochemistry, Geophysics, Geosystems, 2020 Iron and stony‐iron meteorites form the Widmanstätten pattern during slow cooling. This pattern is composed of several microstructures whose length‐scale, composition and magnetic properties are dependent upon cooling rate.
Claire I. O. Nichols +7 more
doaj +1 more source
Molecules, 2023 Experimental studies of the degradation of two ribonucleosides (guanosine and uridine) were carried out by making use of mechanochemistry. Mechanochemical experiments reveal the decomposition of guanosine and uridine, promoted by nickel(II) and carbonate
Gustavo P. Maia +3 more
doaj +1 more source
Proceedings of the National Academy of Sciences, 2011 Primitive meteorites, interplanetary dust particles, and comets contain dust grains that formed around stars that lived their lives before the solar system formed. These remarkable objects have been intensively studied since their discovery a little over twenty years ago and they provide samples of other stars that can be studied in the laboratory in ...
openaire +2 more sources
Study of Iron and Stony Meteorite Ablation Based on Simulation Experiments in an Arc Heater
The Astrophysical JournalTo observe meteorite ablation, simulation experiments were conducted on the L5 ordinary chondrite and IAB-MG iron meteorites in an arc-heated facility and three flight conditions were reproduced.
Lei Wang +7 more
doaj +1 more source
Search and Collection of Yamato Meteorites, Antarctica, in October and November 1974
Antarctic Record, 1976 From October 25, 1974 to January 17, 1975 a four-man party of the 15th Japanese Antarctic Research Expedition (1973-1975) made an oversnow traverse to the Yamato Mountains area for a systematic search for the Yamato meteorites and geological survey.
Keizo YANAI
doaj +1 more source