Results 181 to 190 of about 131,165 (299)

Geochemistry of middle jurassic coal-bearing strata from the Xingmei Mine, Xinjiang, and the origin of localized barium enrichment. [PDF]

Sci Rep
Wu Y, Lu Q, Wang W, Shao F, Wang W, Xadethan H.   +5 more
europepmc   +1 more source

Small‐scale elemental abundance variations in Ryugu particles from touchdown 1

Meteoritics &Planetary Science, EarlyView.
Abstract Ryugu materials closely resemble CI chondrites' mineralogical, chemical, and isotopic compositions; yet minor but resolvable differences in certain elemental abundances are evident. In this study, the bulk chemical compositions of eight individual Ryugu particles (1.5–4.3 mg) from the first touchdown site (TD1) were determined using triple ...
Karina López García, Tetsuya Yokoyama, Ikshu Gautam, Makiko K. Haba, Tsuyoshi Iizuka, Nao Nakanishi, Ryota Fukai   +6 more
wiley   +1 more source

Seismic shifts in the geochemical and microbial composition of a Yellowstone aquifer. [PDF]

PNAS Nexus
Boyd ES, Colman DR, Menchaca A, Spietz RL, Shoemaker A, Finn C, Mencin D, Andrade-Barahona E, Cox A, Kieft T, Bilek S, Hungerford J, Onstott TC.   +12 more
europepmc   +1 more source

Initial study of regolith exposure ages and burial conditions on Ryugu: Cosmogenic nuclides score in two touchdowns

Meteoritics &Planetary Science, EarlyView.
Abstract Surface processes on the asteroid Ryugu have been investigated using cosmic‐ray‐produced radionuclides, 10Be, 26Al, and 36Cl, and stable noble gases, on eight samples returned by the Hayabusa2 spacecraft. The 10Be and 26Al along with 21Ne measurements indicate that the two Chamber A samples A0105 collected during the first touchdown (TD) were ...
Kunihiko Nishiizumi, Keisuke Nagao, Marc W. Caffee, Ryuji Okazaki, Jozef Masarik, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Hiroshi Naraoka, Hikaru Yabuta, Kanako Sakamoto, Kasumi Yogata, Toru Yada, Shogo Tachibana, Sei‐ichiro Watanabe, Yuichi Tsuda, Masanao Abe, Kazuya Kumagai, Akiko Miyazaki, Aiko Nakato, Satoru Nakazawa, Masahiro Nishimura, Tatsuaki Okada, Takanao Saiki, Hirotaka Sawada, Satoshi Tanaka, Tomohiro Usui, Koji Wada, Hajime Yano, Makoto Yoshikawa, Hayabusa2 Initial Analysis Volatile Team   +30 more
wiley   +1 more source

Rare Earth Element Distribution and Paleoenvironmental Implications of Harmanlı (Gölbaşı, Adıyaman) Coals, SE Anatolia. [PDF]

ACS Omega
Ünal-Kartal N, Altunsoy M, Karagöz M.
europepmc   +1 more source

Petrography and mineral chemistry of Northeast Africa 053—A remnant of Martian crystal mush

Meteoritics &Planetary Science, EarlyView.
Abstract In Earth's igneous systems, crystal mushes, crystal‐rich frameworks permeated by silicate melt, represent a common and fundamental stage in the evolution of magma bodies. However, whether crystal mushes occur within Martian igneous systems and play a comparable role is unknown. Here, we present a comprehensive petrography and mineral chemistry
Xhonatan Shehaj, Eleonora Ammannito, Giovanni Pratesi   +2 more
wiley   +1 more source

Geochemical fate of lead in contaminated residential soils following application of amendments for lead immobilization. [PDF]

Front Chem
Saleh H, Braida W, Zhang Z, Datta R, Sarkar D.   +4 more
europepmc   +1 more source

Shipboard methods for marine geochemical analyses

, 1973
openaire   +1 more source

Microspherules Formed by Lightning Strikes

Meteoritics &Planetary Science, EarlyView.
Abstract Natural microspherules are formed by high‐temperature processes and are present throughout the geologic record to the present day. We report the discovery of large numbers of microspherules recovered from a rock pavement in the Pilbara region, Western Australia.
M. R. Boyd, M. J. Genge, A. G. Tomkins
wiley   +1 more source

Methane dynamics in gas chimneys linking geochemical and microbial methane cycling in the Ulleung basin. [PDF]

BMC Microbiol
Han D, Choi J, Jang K, Yi BY, Kim JH.
europepmc   +1 more source