نتایج جستجو برای: magmatism
تعداد نتایج: 1960 فیلتر نتایج به سال:
The timing and nature of igneous activity recorded at a single Mars ejection site can be determined from the isotope analyses of Martian meteorites. Northwest Africa (NWA) 7635 has an Sm-Nd crystallization age of 2.403 ± 0.140 billion years, and isotope data indicate that it is derived from an incompatible trace element-depleted mantle source similar to that which produced a geochemically disti...
We welcome Zhang et al.’s comment on our recent paper dealing with the significance of the first geochemical and geochronological analyses of deep drill-core samples collected from the basement of the central Tarim basin (Guo et al., 2005). In their comments, Zhang et al. raised three questions with regard to our paper (1) the compatibility of our model with regional geology, (2) our interpreta...
The enigma of continental plateaus formed in the absence of continental collision is embodied by the Altiplano-Puna, which stretches for 1800 km along the Central Andes and attains a width of 350–400 km. The plateau correlates spatially and temporally with Andean arc magmatism, but it was uplifted primarily because of crustal thickening produced by horizontal shortening of a thermally softened ...
The Dead Sea Fault (DSF) is a crustal-scale continental transform fault separating the African and Arabian plates. Neogene to Quaternary volcanic activity well-spread in Northern Israel. Yet, origin of magmas that fed eruptions still unpinned. Our local earthquake tomography depicts velocity distributions typical rifting settings. At 9 km depth, prominent high Vp/Vs anomaly marks presence cooli...
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