The isotopic composition of H2 (δD = 187‰ to 160‰) is consistent with isotopic equilibrium between H2 and H2O in the conditions of emission. Both the chemistry of the gases and the low δ13C of carbon dioxide (11.6‰, PDB) suggest extensive magma outgassing occurred during the course ...
addressing the ore body and the ore composition.The ore body is subdivided into the type of pegmatites (pseudopegmatite, metapegmatite, pegmatoid, pegmatite, and plutonic pegmatite), the shape and the structure of pegmatites, while the ore composition is characterized by the chemical and minera...
Zircon Hf isotopic data from a zoned pluton of the Moonbi supersuite, New England batholith, eastern Australia, are consistent with magma mixing between tw... S. E. Shaw and R. H. Flood* - 《Journal of Petrology》 被引量: 110发表: 2009年 Hf isotopic composition of zircons from the ...
Chemical composition of Mars Comparison of model compositions for 5 differentiated planets (Earth, Venus, Mars, Moon, and eucrite parent body) suggests that volatile depletion correlates... JW Morgan,E Anders - 《Geochimica Et Cosmochimica Acta》 被引量: 344发表: 1979年 The parental magma of ...
Correspondingly, the total crust shows an more evolved composition and is characterized by a significant negative Eu anomaly (Eu/Eu = 0.80), low Sr/Nd (10.4), and high La/Nb (3.0) ratios. The obtained SiO 2 is 64% on a volatile-free basis. The near arc magma La/Nb ratio implies ...
The intracratonic, 2.06 Ga volcanic rocks of the Rooiberg Group of southern Africa consist of nine magma types, varying in composition from basalt to rhyol... J C.,Hatton,and,... - 《Journal of African Earth Sciences》 被引量: 123发表: 1995年 Insight into magma genesis at convergent pl...
of chlorine as a function of pressure and magma chemistry, and the complex interplay between the two that occurs in polybaric magmatic systems. Here we present experimental determinations of chlorine partitioning as a function of fluid and melt composition at pressures from 50 to 800 MPa. We ...
From andesitic volcanism to the formation of a porphyry Cu-Au mineralizing magma chamber: the Farallon Negro Volcanic Complex, northwestern Argentina The geological relations and geochemical composition of extrusive and subvolcanic intrusive rocks of the Upper Miocene Farallon Negro Volcanic Complex (NW ...
– chemical composition, origins and or... Fr?hlich, R.,Cubison, M. J.,Slowik, J. G.,... - Atmospheric Chemi... - 2015 - 被引量: 43 Fluorine and chlorine fractionation during magma ocean crystallization: Constraints on the origin of the non-chondritic F/Cl ratio of the Earth ...
It has been shown that, in comparison with basalts, the products formed as a result of the processes of magma generation, earthquakes, volcanic activity, formation of lamproite and kimberlite tubes and others are enriched with light mantle elements.This can be explained by the fact that the rea...