Results 61 to 70 of about 63,412 (230)

Atmospheric Chemistry of Venus-like Exoplanets

, 2010
We use thermodynamic calculations to model atmospheric chemistry on terrestrial exoplanets that are hot enough for chemical equilibira between the atmosphere and lithosphere, as on Venus. The results of our calculations place constraints on abundances of
Bruce Fegley, Charbonneau, Clampin, de Bergh, Fegley, Fegley, Fegley, Grillmair, Jackson, Kaltenegger, Laura Schaefer, Levine, Schaefer, Seiff, Swain, Swain, Swain, Tian, Yung   +18 more
core   +1 more source

The potassic sedimentary rocks in Gale Crater, Mars, as seen by ChemCam on board Curiosity [PDF]

, 2016
The Mars Science Laboratory rover Curiosity encountered potassium-rich clastic sedimentary rocks at two sites in Gale Crater, the waypoints Cooperstown and Kimberley.
Anderson, RB, Blaney, D, Clegg, S, Cousin, A, Dromart, G, Fabre, C, Fisk, M, Forni, O, Gasnault, O, Grotzinger, JP, Gupta, S, Lanza, N, Lasue, J, Le Deit, L, Le Mouelic, S, Mangold, N, Maurice, S, McLennan, SM, Meslin, P-Y, Nachon, M, Newsom, H, Payre, V, Rapin, W, Rice, M, Sautter, V, Schroder, S, Stack, KM, Sumner, D, Treiman, AH, Wiens, RC   +29 more
core   +3 more sources

Peixe Zircon as a Quality Control Reference Material in U‐Pb Geochronology by LA‐ICP‐MS

Geostandards and Geoanalytical Research, EarlyView.
Key Points Peixe#0 zircon was characterised for U‐Pb geochronology using CA‐ID‐TIMS, SIMS and a long‐term LA‐ICP‐MS data set. The consistent results establish Peixe#0 as a reference material for U‐Pb quality control. Trace element heterogeneity requires careful, CL‐guided spot selection.
Margareth Sugano Navarro, Erica Martini Tonetto, Elson P. Oliveira, Mauricio Ibañez‐Mejia, Cristina Talavera, Neal J. McNaughton, Jacinta Enzweiler, Michael Wiedenbeck   +7 more
wiley   +1 more source

Geophysical and Geochemical Evidence for a New Mafic Magmatic Province Within the Northwest Shelf of Australia

Geochemistry, Geophysics, Geosystems, 2022
The formation of mafic magmatic provinces are significant geological events that can drive mass extinctions and continental rifting and can influence basin evolution, petroleum prospectivity and mineralization.
C. T. G. Yule, C. Spandler
doaj   +1 more source

Zircon U-Pb ages of the mafic gneiss and leucogneiss from the Bailey Peninsula: Constraints on the timing of the tectonothermal events related to the amalgamation of Rodinia in the Windmill Islands, East Antarctica

Dizhi lixue xuebao, 2021
We report new geochronological data of the mafic gneiss and leucogneiss from the Windmill Islands, East Antarctica, in order to unravel the tectonothermal events related to the amalgamation of Rodinia. SHRIMP zircon U-Pb dating from the mafic gneiss (Hbl-
WANG Yanbin, WANG Hao, REN Liudong, JIAO Yongyan, TONG Laixi, WILLIAMS Ian S   +5 more
doaj   +1 more source

Fine-Scale Variations in Eucritic Pyroxene FeO/MnO: Process vs. Provenance. [PDF]

, 2018
Most asteroidal igneous rocks are eucrite-like basalts and gabbros, composed mostly of ferroan low- and high-Ca pyroxenes and calcic plagioclase, plus smaller amounts of silica (most commonly tridymite), ilmenite, chromite, troilite, Ca-phosphate, metal ...
Barrett, T. J., Berger, E. L., Le, L, Mittlefehldt, D. W., Peng, Z. X., Ross, D. K   +5 more
core  

U and Th content in the Central Apennines continental crust: a contribution to the determination of the geo-neutrinos flux at LNGS

, 2011
The regional contribution to the geo-neutrino signal at Gran Sasso National Laboratory (LNGS) was determined based on a detailed geological, geochemical and geophysical study of the region.
A. Riva, Agostinelli, Anderson, Araki, Argnani, Arpesella, Babbucci, Barchi, Bassin, Battaglia, Beccaluva, Behn, Bellini, Bellotti, Bernoulli, Bernoulli, Bigi, Billi, Billi, Borghi, Boriani, Boriani, C. Tomei, Calamita, Carminati, Carruba, Cassinis, Cavazza, Cavinato, Cermak, Channel, Christensen, Ciarapica, Cipollari, Coltorti, Coltorti, Conticelli, Crescenti, Dal Piaz, De Marchi, Della Vedova, Dewey, Di Luzio, Dziewonski, D’Amico, Eder, Elter, Enomoto, F. Mantovani, Finetti, Finetti, Finetti, Finetti, Fiorentini, Fiorentini, Fogli, Franz, G. Di Carlo, G. Fiorentini, G. Rusciadelli, Gao, Ghisetti, Govindaraju, Holbrook, Hunziker, Hurtig, Jenkyns, Jochum, Jolivet, Lachance, Lucente, M. Coltorti, M. Morsilli, Mantovani, Mantovani, Martinis, Marx, Mazzucchelli, McDonough, Mele, Oldow, Palme, Panza, Patacca, Patacca, Patacca, Plank, Ponziani, Quick, Quick, R. Boraso, R. Tassinari, Raghavan, Rivalenti, Rothschild, Rudnick, Rudnick, Salter, Sani, Santantonio, Sassi, Schnetger, Scisciani, Scisciani, Scrocca, Speranza, Telford, V. Chubakov, Vai, Viti, Wedepohl, Workman, Wortel, Yegorova, Zappaterra, Zartman   +115 more
core   +1 more source

Trace element and isotope constraints on crustal anatexis by upwelling mantle melts in the North Atlantic Igneous Province: an example form the Isle of Rum, NW Scotland [PDF]

, 2009
Sr and Nd isotope ratios, together with lithophile trace elements, have been measured in a representative set of igneous rocks and Lewisian gneisses from the Isle of Rum in order to unravel the petrogenesis of the felsic rocks that erupted in the early ...
Ellam, R.M., Emeleus, C.H., Hertogen, J., Meyer, R., Nicoll, G.R., Troll, V.R.   +5 more
core   +1 more source

Timing of Metamorphism and Deformation in the Neoarchean Quetico Metasedimentary Belt, Superior Craton, Constrained by Garnet Trace‐Element Mapping and Lu–Hf Geochronology

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The Quetico subprovince of the Superior Province is among the largest metasedimentary belts globally and provides evidence of tectonic processes at play during the final stages of Archean cratonization. Although previous studies have shown that deformation and metamorphism of the 2.7‐Ga turbiditic protolith resulted in regional subvertical ...
Adrian G. Rehm, Antoine Godet, Doug Tinkham, Carl Guilmette, Matthijs A. Smit   +4 more
wiley   +1 more source

CO2-crystal wettability in potassic magmas. Implications for eruptive dynamics in light of experimental evidence for heterogeneous nucleation. [PDF]

, 2017
The volatile content in magmas is fundamental for the triggering and style of volcanic eruptions. Carbon dioxide, the second most abundant volatile component in magmas after H2O, is the first to reach saturation upon ascent and depressurization.
Fanara, S., PALLADINO, Danilo Mauro, Schmidt, B., SILLENI, AURORA, SOTTILI, Gianluca   +4 more
core   +1 more source