Results 171 to 180 of about 10,706 (208)

Ba isotope geochemistry of the mantle

Acta Petrologica Sinica, 2022
Fang HUANG, HuiMin YU, XiaoYun NAN, XiaoFeng GU, Fei WU, ZiCong XIAO, RuiXia BAI, LinRu FANG   +7 more
openaire   +1 more source

Insights into the dynamics of mantle plumes from uranium-series geochemistry

Nature, 2006
The long-standing paradigm that hotspot volcanoes such as Hawaii or Iceland represent the surface expression of mantle plumes--hot, buoyant upwelling regions beneath the Earth's lithosphere--has recently been the focus of controversy. Whether mantle plumes exist or not is pivotal for our understanding of the thermal, dynamic and compositional evolution
Bourdon, B., Ribe, N., Stracke, A., Saal, A., Turner, S.   +4 more
openaire   +3 more sources

Mantle geochemistry: the message from oceanic volcanism

Nature, 1997
Basaltic volcanism 'samples' the Earth's mantle to great depths, because solid-state convection transports deep material into the (shallow) melting region. The isotopic and trace-element chemistry of these basalts shows that the mantle contains several isotopically and chemically distinct components, which reflect its global evolution.
openaire   +1 more source

Reconciling Mantle Rare Gas Geochemistry with Tomographic Evidence of Whole Mantle Convection

Mineralogical Magazine, 1998
High-resolution seismic tomography clearly shows that lithospheric plates penetrate the 670 km discontinuity (e.g. van der Hilst et al, 1997). A common view defended by geochemists (Turekian, 1959; Allbgre et al. , 1996) holds that the isotopic composition of He and Ar is incompatible with geophysical evidence because (a) the inventory of terrestrial ...
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Isotope and Trace Element Geochemistry of the Earth’s Mantle

1979
Chemical and isotopic information about the Earth’s mantle can be obtained from several sources, but all require certain assumptions: 1. Chondritic Meteorites are assumed to represent primitive matter of the solar system. Chemical models for the mantle usually assume loss of volatile elements, possibly including alkalis, during and after ...
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Geochemistry: Mantle heterogeneity and convection

Nature, 1983
H. Bougault, S. C. Cande, J.-G. Schilling, D. L. Turcotte, P. Olson   +4 more
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Multiple intrusion stages and mantle sources of the Paleozoic Kuznetsk Alatau alkaline province, Southern Siberia: geochemistry and Permian U–Pb, Sm–Nd ages in the Goryachegorsk ijolite-foyaite intrusion

International Geology Review, 2021
V V Vrublevskii, I F Gertner
exaly  

The significance of Mo for the geochemistry of the upper mantle

Chemical Geology, 1988
K. Lodders, H. Palme
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Mantle Geochemistry

2016
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Sm and Nd Geochemistry of mantle xenoliths: The problem of mantle material classification

Doklady Earth Sciences, 2010
V. A. Glebovitskii, L. P. Nikitina, Yu. D. Pushkarev, A. B. Vrevskii, A. G. Goncharov, E. S. Bogomolov   +5 more
openaire   +1 more source