scholarly journals Trace element and isotopic effects of mantle metasomatism by carbonatitic and alkaline silicate melts in the lower cratonic mantle lithosphere

2019 ◽  
Keyword(s):  
Trace Element ◽  
Mantle Metasomatism ◽  
Silicate Melts ◽  
Mantle Lithosphere ◽  
Cratonic Mantle ◽  
Isotopic Effects

Mantle metasomatism: Isotope and trace-element trends in xenoliths from Kimberley, South Africa

1990 ◽  
Vol 85 (1-2) ◽  
pp. 19-34 ◽  
Author(s):  
C.J. Hawkesworth ◽  
A.J. Erlank ◽  
P.D. Kempton ◽  
F.G. Waters
Keyword(s):  
South Africa ◽  
Trace Element ◽  
Mantle Metasomatism

Lithospheric roots beneath western Laurentia: the geochemical signal in mantle garnets

2003 ◽  
Vol 40 (8) ◽  
pp. 1027-1051 ◽  
Author(s):  
D Canil ◽  
D J Schulze ◽  
D Hall ◽  
B C Hearn Jr. ◽  
S M Milliken
Keyword(s):  
Rare Earth ◽  
North America ◽  
Trace Element ◽  
Earth Element ◽  
Geochemical Data ◽  
Trace Element Data ◽  
Mantle Lithosphere ◽  
Western North America ◽  
Wyoming Province ◽  
Thick Mantle

This study presents major and trace element data for 243 mantle garnet xenocrysts from six kimberlites in parts of western North America. The geochemical data for the garnet xenocrysts are used to infer the composition, thickness, and tectonothermal affinity of the mantle lithosphere beneath western Laurentia at the time of kimberlite eruption. The garnets record temperatures between 800 and 1450°C using Ni-in-garnet thermometry and represent mainly lherzolitic mantle lithosphere sampled over an interval from about 110–260 km depth. Garnets with sinuous rare-earth element patterns, high Sr, and high Sc/V occur mainly at shallow depths and occur almost exclusively in kimberlites interpreted to have sampled Archean mantle lithosphere beneath the Wyoming Province in Laurentia, and are notably absent in garnets from kimberlites erupting through the Proterozoic Yavapai Mazatzal and Trans-Hudson provinces. The similarities in depths of equilibration, but differing geochemical patterns in garnets from the Cross kimberlite (southeastern British Columbia) compared to kimberlites in the Wyoming Province argue for post-Archean replacement and (or) modification of mantle beneath the Archean Hearne Province. Convective removal of mantle lithosphere beneath the Archean Hearne Province in a "tectonic vise" during the Proterozoic terminal collisions that formed Laurentia either did not occur, or was followed by replacement of thick mantle lithosphere that was sampled by kimberlite in the Triassic, and is still observed there seismically today.

Trace element partitioning between silicate melts – A molecular dynamics approach

2017 ◽  
Vol 205 ◽  
pp. 245-255 ◽  
Author(s):  
Johannes Wagner ◽  
Volker Haigis ◽  
Daniela Künzel ◽  
Sandro Jahn
Keyword(s):  
Molecular Dynamics ◽  
Trace Element ◽  
Silicate Melts ◽  
Trace Element Partitioning ◽  
Element Partitioning

A fresh isotopic look at Greenland kimberlites: Cratonic mantle lithosphere imprint on deep source signal

2011 ◽  
Vol 305 (1-2) ◽  
pp. 235-248 ◽  
Author(s):  
Sebastian Tappe ◽  
D. Graham Pearson ◽  
Geoff Nowell ◽  
Troels Nielsen ◽  
Phil Milstead ◽  
...  
Keyword(s):  
Mantle Lithosphere ◽  
Source Signal ◽  
Cratonic Mantle ◽  
Deep Source

Trace element partitioning between immiscible silicate melts with H2O, P, S, F, and Cl

2013 ◽  
Vol 357 ◽  
pp. 178-185 ◽  
Author(s):  
G.W. Lester ◽  
T.K. Kyser ◽  
A.H. Clark ◽  
D. Layton-Matthews
Keyword(s):  
Trace Element ◽  
Silicate Melts ◽  
Trace Element Partitioning ◽  
Element Partitioning
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