Results 91 to 100 of about 858 (191)

Development ICP-MS isotope dilution preconcentration techniques for determination of platinum group elements in volcanic rocks [PDF]

, 1999
Understanding PGE geochemistry in low abundance (i.e. sub ppb level) geological samples has been hampered by the absence of an accurate, low blank, preconcentration technique. Ni- S fire assay, the traditional preconcentration method, has been critically
Woodland, Sarah Justine
core  

Alpine-style nappes thrust over ancient North China continental margin demonstrate large Archean horizontal plate motions. [PDF]

Nat Commun, 2021
Zhong Y, Kusky T, Wang L, Polat A, Liu X, Peng Y, Luan Z, Wang C, Wang J, Deng H.   +9 more
europepmc   +1 more source

Primary magmas and mantle temperatures

, 2015
The composition of olivine phenocrysts in Hawaiian tholeiitic picrites and in Mid-Ocean Ridge picrites vary up to Mg91.3# and Mg92.1# respectively. The compositions and liquids temperatures of the magmas crystallizing the most magnesian phenocrysts can ...
Eggins, Stephen, Falloon, T J, Green, David, Yaxley, Gregory   +3 more
core   +1 more source

Linking the Wrangellia flood basalts to the Galápagos hotspot. [PDF]

Sci Rep, 2021
Shellnutt JG, Dostal J, Lee TY.
europepmc   +1 more source

On the petrogenesis of picrite complexes in the Bashkirian meganticlinorium [PDF]

Geologicheskii vestnik, 2018
S.G. Kovalev, S.I. Vysotsky, S.S. Kovalev   +2 more
openaire   +1 more source

The oxygen isotope composition of Karoo and Etendeka picrites: High δ18O mantle or crustal contamination?

, 2015
Olivine and orthopyroxene phenocrysts from picrite and picrate basalt lavas and dykes (Mg# 64-80) from the Tuli and Mwanezi (Nuanetsi) regions of the ~180 Ma Karoo Large Igneous province (LIP) have δ18O values that range from 6.0 to 6.7 ‰ (Fig.
Cochrane, Ryan, Martin, Laure, Le Roux, Petrus, Duncan, Andrew R, Marsh, Julian S, Harris, Christopher, Harris, Chris, Le Roex, A P   +7 more
core   +1 more source

A Variety of Picrite (Scyelite) in Sark [PDF]

Geological Magazine, 1891
openaire   +1 more source

Decreasing extents of Archean serpentinization contributed to the rise of an oxidized atmosphere. [PDF]

Nat Commun, 2021
Leong JAM, Ely T, Shock EL.
europepmc   +1 more source

Mantle heterogeneity during the formation of the North Atlantic Tertiary Province: Constraints from trace element and Sr^Nd^Os^O isotope systematics of Baffin Island picrites

, 2004
[1] Sr-Nd-Os-O isotope and major and trace element data from 62 Ma picrites from Baffin Island constrain the composition of mantle sources sampled at the inception of North Atlantic Igneous Province (NAIP) magmatism. We recognize two compositional types.
D. Francis, Kent, A.J.R., A. J. R. Kent, Frei, Robert, Eiler, J., Woodland, J., E. M. Stolper, R. Frei, J. Eiler, J. Woodhead, Stolper, E.M., Francis, D.   +11 more
core  

Major and trace element compositions of chromites from the Stillwater, Bushveld and Great Dyke intrusions compared with chromites from komatiites, boninites and large igneous provinces

, 2020
The composition of the magmas from which the chromites that form the massive chromite layers of the Stillwater, Great Dyke and Bushveld Complexes are of interest both to understand the economic importance of the resources in the layers (Cr and PGE), but ...
Arguin, Jean-Philippe, Pagé, Philippe, Mansur, Eduardo T., Barnes, Sarah-Jane, Meric, Julien   +4 more
core