Results 71 to 80 of about 16,800 (234)

Oxygen Isotope Variations of Basaltic Lavas and Upper Mantle Rocks [PDF]

, 2001
This chapter summarizes the oxygen isotope geochemistry of terrestrial basalts and their mantle sources, including the conceptual framework for interpreting such data and the phenomenology of known variations.
Eiler, John M.
core  

A uniform isotopic and chemical signature of dust exported from Patagonia: Rock sources and occurrence in southern environments [PDF]

, 2007
Patagonia is considered to be the most important source of dust from South America that is deposited in surrounding areas, and we present here a systematic Sr and Nd isotopic study of sediment currently being exported.
Brunet, Frédéric, Depetris, Pedro J., Gaiero, Diego M., Probst, Jean-Luc   +3 more
core   +3 more sources

Carbonate sedimentology: An evolved discipline

The Depositional Record, Volume 12, Issue 1, February 2026.
Abstract Although admired and examined since antiquity, carbonate sediment and rock research really began with Charles Darwin who, during a discovery phase, studied, documented and interpreted their nature in the mid‐19th century. The modern discipline, however, really began after World War II and evolved in two distinct phases.
Noel P. James, Peir K. Pufahl
wiley   +1 more source

Geothermal field of the Grodno region of the Republic of Belarus

Журнал Белорусского государственного университета: География, геология, 2023
The geothermal field of the platform cover within the Grodno region is considered. The cover rests on a crystalline basement of Precambrian rocks. Temperature distribution maps for depths of 100; 200 and 300 m below ground level were compiled based on ...
Владимир Игнатьевич Зуй
doaj  

Geophysical and geochemical constraints on geoneutrino fluxes from Earth's mantle [PDF]

, 2012
Knowledge of the amount and distribution of radiogenic heating in the mantle is crucial for understanding the dynamics of the Earth, including its thermal evolution, the style and planform of mantle convection, and the energetics of the core.
Allègre, Araki, Arevalo, Arevalo, Bassin, Bellini, Boyet, Campbell, Davies, Dye, Dye, Dziewonski, Edwin S. Kite, Enomoto, Fiorentini, Fiorentini, Fitoussi, Gando, Hart, Hofmann, Jaupart, Javoy, Javoy, Krauss, Mantovani, McDonough, McDonough, Murakami, O'Neill, Ondřej Šrámek, Palme, Ritsema, Rudnick, Salters, Shijie Zhong, Stephen T. Dye, Su, Turcotte, Vedran Lekić, Wang, Warren, Wasson, Wen, William F. McDonough, Workman, Wurm, Zhang   +46 more
core   +2 more sources

Sedimentary records of palaeohydrological variability during the Late Holocene in the Lower Narmada Basin, western India

The Depositional Record, Volume 12, Issue 1, February 2026.
Late Holocene palaeohydrological changes in the lower Narmada Basin, India, revealed using multiproxy analyses of the Orsang River terrace sediments. Distinct depositional phases corresponding to global climatic events were recorded. High‐magnitude floods in the Narmada River during the MWP, and within the tributary Orsang River during DACP and LIA ...
Alpa Sridhar, Pooja Tiwari, Biswajit Thakur, Deependra Singh, Vineet Goswami, Sanjit Kumar Jena, Ravi Bhushan, Saremulhaq Parwej Mosarraf Shaikh, Deepak Maurya, Laxman Singh Chamyal   +9 more
wiley   +1 more source

Temporal Changes in Europa's Ice Shell Thickness: Insights From Models of Convection

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Europa is characterized by a thin ice Ih shell overlying a subsurface ocean and a large solid core. Estimates of the outer ice shell's thickness range from a few kilometers to several tens of kilometers, with strong implications for Europa's thermal and geological history.
Ji‐Ching Chen, Frédéric Deschamps, Wen‐Pin Hsieh   +2 more
wiley   +1 more source

Pb isotope geochemistry and reappraisal of Sr-Nd isotopes of the Cerro Morado basic magmatism (Ischigualasto-Villa Union Triassic basin, NW Argentina): Implications for the mantle sources

Brazilian Journal of Geology
: Sr-Nd-Pb isotopic signatures were determined for silica-undersaturated hypabyssal alkaline basic rocks of the Los Baldecitos Formation in the Cerro Morado area, situated in the Ischigualasto - Vale de la Luna Provincial Park (northernmost San Juan ...
Carlos Augusto Sommer, Carla Joana S. Barreto, Jean Michel Lafon, Evandro Fernandes de Lima, Felipe Marcelo Alexandre, Farid Chemale Jr., Edinei Koester   +6 more
doaj   +1 more source

Production of 92Nb, 92Mo, and 146Sm in the gamma-process in SNIa [PDF]

, 2014
The knowledge of the production of extinct radioactivities like 92Nb and 146Sm by photodisintegration processes in ccSN and SNIa models is essential for interpreting abundances in meteoritic material and for Galactic Chemical Evolution (GCE).
Gallino, R., Hirschi, R., Nishimura, N., Rauscher, T., Travaglio, C.   +4 more
core   +2 more sources

Earth-atmosphere evolution based on the new determination of Devonian atmosphere Ar isotopic composition [PDF]

The isotopic composition of the noble gases, in particular Ar, in samples of ancient atmosphere trapped in rocks and minerals provides the strongest constraints on the timing and rate of Earth atmosphere formation by degassing of the Earth's interior. We
Gandanger, Pierre, Mark, Darren F., McConville, Paul, Stuart, Finlay M.   +3 more
core   +1 more source