Results 81 to 90 of about 115,962 (208)

Conditions for melting and metasomatism in the Earth's mantle [PDF]

, 1984
If we know the compositions of mantle rocks at various depths, and the geotherm in different tectonic environments, then the conditions for melting are defined by experimentally determined solidus curves.
Wyllie, Peter J.
core  

Mineral physics of the mantle [PDF]

, 1995
The last few years have seen intense interest in the global environment and climate change, and with it an increasing appreciation for the interactions between the atmosphere, biosphere, oceans and the solid earth.
Lars Stixrude, Stixrude, L
core   +1 more source

Mantle flow influence on subduction evolution [PDF]

, 2018
The impact of remotely forced mantle flow on regional subduction evolution is largely unexplored. Here we investigate this by means of 3D thermo-mechanical numerical modeling using a regional modeling domain. We start with simplified models consisting of
Wim Spakman, Chertova, Maria V., Mantle dynamics & theoretical geophysics, Maria V. Chertova, Chertova, Mariya V., Spakman, Wim, Steinberger, Bernhard, Bernhard Steinberger   +7 more
core   +2 more sources

Quantitative mapping of the oxidative effects of mantle metasomatism

Geology, 2013
The oxidation state of Fe in garnets in a garnet peridotite xenolith from the Wesselton kimberlite (South Africa) was quantitatively mapped using X-ray absorption near edge structure (XANES) spectroscopy. Maps of Fe3+/ΣFe were produced by recording the fluorescence intensity at discrete energies rather than recording the full spectrum at each point ...
Berry, Andrew John, Yaxley, Gregory, Hanger, Brendan, Woodland, Alan, de Jonge, Martin, Howard, Daryl, Paterson, David, Kamenetsky, Vadim S   +7 more
openaire   +2 more sources

Sub-continental lithospheric mantle beneath the Adamawa volcanic area (Cameroon Volcanic Line): inference from lavas and hosted mantle xenoliths from Bini Warack, NE-Ngaoundéré, Cameroon (Central Africa)

BSGF - Earth Sciences Bulletin
The sub-continental lithospheric mantle (SCLM) beneath the Cameroon Volcanic Line (CVL) is vertically and laterally heterogeneous, consisting of a complex mixing of DMM, HIMU, and EM1, affected by modal or cryptic metasomatism, depending on the area. The
Mbassa Benoît Joseph, Vanderhaeghe Olivier, Grégoire Michel, Benoît Mathieu, Itiga Zenon, Ngwa Neh Caroline, Kamgang Pierre   +6 more
doaj   +1 more source

Long‐Term Radiogenic Heating by Abortively Erupted Basalts Triggers 120 Ma Lunar Volcanism

Geophysical Research Letters
The mantle source and formation mechanism of the recently discovered ∼120 Ma lunar volcanic glass beads (VGBs) in Chang'e‐5 samples remain elusive. By systematically comparing the compositions of ∼120 Ma VGBs with those of ancient Apollo VGBs, we propose
Qian W. L. Zhang, Yi Chen, Bin Su, Jia‐Hui Liu, Qiu‐Li Li, Xian‐Hua Li   +5 more
doaj   +1 more source

First Identification of Mafic Igneous Enclaves in Miocene Lavas of Southern Tibet With Implications for Indian Continental Subduction

Geophysical Research Letters, 2018
The history of Indian continental subduction beneath Asian plate remains unclear. Miocene ultrapotassic rocks in southern Tibet, with extremely enriched isotopes, have often been used to trace mantle metasomatism and geodynamic processes associated with ...
Lu‐Lu Hao, Qiang Wang, Derek A. Wyman, Yue Qi, Lin Ma, Fang Huang, Le Zhang, Xiao Ping Xia, Quan Ou   +8 more
doaj   +1 more source

Mantle metasomatism beneath the Siberian platform [PDF]

, 1997
The composition and evolution of the upper mantle is recorded in deep-seated xenoliths, brought to the surface of the Earth by kimberlites. These xenoliths have experienced a wide variety of processes at varied temperatures and pressures during their ...
Sobolev, Vladimir
core  

Metasomatism and fluid generation in mantle xenoliths

, 1987
The concept of metasomatism was developed in the study of crustal rocks, to describe a process of alteration that involves enrichment by new substances brought in from the outside by fluids, commonly considered to be dilute aqueous solutions or ...
Wyllie, P. J.
core  

Metasomatism and Melting of Cordilleran Lithosphere Resulting From Sediment Relamination During Shallow Subduction

Geochemistry, Geophysics, Geosystems
Mantle xenoliths recovered from the modern backarc region of the northern Altiplano Plateau record metasomatism by slab‐derived silicic melts, and a suite of Quaternary volcanics suggest that melting of accreted crustal material has persisted since ...
C. D. Hiett, D. L. Newell, J. W. Shervais   +2 more
doaj   +1 more source