Osmium isotopic characteristics of mantle-derived rocks. Geochimica et Cosmochimica Acta, 55(5): 1421-1434.MARTIN, C.E. (1991): Osmium isotopic characteristics of man- tle-derived rocks. Geochim. Cosmochim. Acta 55, 1421- 1434.Martin CE (1991) Osmium isotopic characteristics of mantle-derived ...
the crust is dominated by pillow basalts. These form when lava erupts into seawater and cools rapidly, creating bulbous, pillow-like structures. The sheeted dike complex consists of vertical basaltic dikes that serve as conduits for magma transport from deeper within the Earth's mantle to the su...
The Peng Co ophiolite is mainly composed of mantle peridotites, cumulates, diabase dikes. About 70 percent peridotites are harzburgites and 30 percent are lherzolites. Mineral chemistry of the Peng Co lherzolitesare characterized by low Fo contents (88.85–90.33) of olivine and high Al2O3 ...
It is suggested that the parent magmas in the Ohe rift were produced by an adiabatic decompression melting of ambient upper mantle in response to lithospheric extension associated with the Alpine Orogeny.doi:10.1007/s00531-013-0948-7Skála, Roman...
Learn more about this topic: Layers of the Earth | Overview, Diagram & Temperature from Chapter 4 / Lesson 10 373K Learn about the layers of the Earth and see which is the thinnest layer of Earth. Explore the Earth's crust, mantle, and the Earth's core and see their component...
The minor variations in marginal basin basalt chemistry suggest control by differences in depth of melt separation, extent of mantle melting or subsequent fractional crystallization. In general, it appears that these basalts evolve in a manner similar to ORB; the range in chemistry may be related ...
During subduction, a tectonic plate, consisting of oceanic crust and lithospheric mantle, is recycled back into the deeper mantle. In most subduction zones the subducting plate is relatively cold compared with the high temperature it had when first formed at a mid-ocean spreading ridge. Subduction...
1999. Geochemical characteristics of the Mesozoic basalts in Da Hinggan Ling:Evidence of the mantle-crust interaction[J]. Acta Petrologica Sinica, 15(3):397-407 (in Chinese with English abstract). Google Scholar Ge Wenchun, Li Xianhua, Lin Qiang, Sun Deyou, Wu Fuyuan, Yun Sunghyo. ...
Extrusive rock forms when magma rises from the mantle, erupts on the earth's surface as lava, and cools and crystallizes quickly on the surface of the earth once it is exposed. This can happen on land as active volcanoes that we can see, or under the ocean when underwater volcanoes erupt...
Natural gold is the important form of Au in this deposit with a relatively large (up to 200 μm) grain size, suggesting the prospect of mineralization at deeper domains. The accompanying PGE minerals (Hexaferrum) hint at contributions from mantle material. The ore-forming fluids of the Qian...