CHERTS OF THE BARBERTON GREENSTONE BELT, SOUTH AFRICA: PETROLOGY AND TRACE-ELEMENT GEOCHEMISTRY OF 3.5 TO 3.3 GA OLD SILICIFIED VOLCANICLASTIC SEDIMENTS

2013 ◽  
Vol 116 (2) ◽  
pp. 297-322 ◽  
Author(s):  
A. HOFMANN ◽  
R. BOLHAR ◽  
B. ORBERGER ◽  
F. FOUCHER
Keyword(s):  
South Africa ◽  
Trace Element ◽  
Greenstone Belt ◽  
Trace Element Geochemistry ◽  
Element Geochemistry ◽  
Barberton Greenstone Belt

Trace element geochemistry of ilmenite megacrysts from the Monastery kimberlite, South Africa

Lithos ◽  
1992 ◽  
Vol 29 (1-2) ◽  
pp. 1-18 ◽  
Author(s):  
R.O. Moore ◽  
W.L. Griffin ◽  
J.J. Gurney ◽  
C.G. Ryan ◽  
D.R. Cousens ◽  
...  
Keyword(s):  
South Africa ◽  
Trace Element ◽  
Trace Element Geochemistry ◽  
Element Geochemistry

Major and trace element geochemistry in Zeekoevlei, South Africa: A lacustrine record of present and past processes

2008 ◽  
Vol 23 (8) ◽  
pp. 2496-2511 ◽  
Author(s):  
Supriyo Kumar Das ◽  
Joyanto Routh ◽  
Alakendra N. Roychoudhury ◽  
J. Val Klump
Keyword(s):  
South Africa ◽  
Trace Element ◽  
Trace Element Geochemistry ◽  
Element Geochemistry

Geodynamic Reconstruction of the Winston Lake Greenstone Belt and VMS Deposits: New Trace Element Geochemistry and U-Pb Geochronology

2014 ◽  
Vol 109 (5) ◽  
pp. 1291-1313 ◽  
Author(s):  
R. W. D. Lodge ◽  
H. L. Gibson ◽  
G. M. Stott ◽  
J. M. Franklin ◽  
M. A. Hamilton
Keyword(s):  
Trace Element ◽  
Greenstone Belt ◽  
Trace Element Geochemistry ◽  
Element Geochemistry ◽  
Vms Deposits

Trace element geochemistry of the Meen-Dempster greenstone belt, Uchi subprovince, Superior Province, Canada: back-arc development on the margins of an Archean protocontinent

2000 ◽  
Vol 37 (7) ◽  
pp. 1021-1038 ◽  
Author(s):  
Pete Hollings ◽  
Greg Stott ◽  
Derek Wyman
Keyword(s):  
Trace Element ◽  
Greenstone Belt ◽  
Volcanic Rocks ◽  
Tholeiitic Basalt ◽  
Pyroclastic Flows ◽  
Trace Element Geochemistry ◽  
Element Geochemistry ◽  
Lree Enrichment ◽  
Compositional Diversity ◽  
Back Arc

Comprehensive trace element analyses of mafic and felsic volcanic rocks from the 2.85-2.74 Ga Meen-Dempster greenstone belt reveal a wide compositional diversity. The ~2.85 Ga Kaminiskag assemblage is dominated by mafic tholeiite characterized by predominantly unfractionated REE (La/Smn = 0.8-1.1). Rare intermediate and felsic pyroclastic flows (SiO2 = 62-74) with moderate to pronounced LREE enrichment are intercalated with the tholeiite. The Kaminiskag assemblage is overlain by the ~2825 Ma Meen assemblage, comprising dominantly dacitic tuffs and pyroclastic breccia, displaying enriched LREE (La/Smn = 3.7-7.2) and moderately fractionated HREE, in conjunction with pronounced negative Nb anomalies. Five distinct suites have been recognized in the ~2740 Ma Confederation assemblage: (1) tholeiitic basalt with flat to smoothly depleted REE, (2) tholeiite with flat to weakly depleted LREE in conjunction with pronounced negative Nb anomalies, (3) Fe-rich basalt with elevated Ti and P contents, LREE enrichment, and fractionated HREE, (4) LREE enriched basalt and andesite with negative Nb anomalies, and (5) dacite and rhyolite with enriched LREE, moderately fractionated HREE, and variable high field strength element anomalies. The geochemistry and geochronology of the Kaminiskag and Meen assemblages are consistent with the formation of an oceanic back arc (Kaminiskag assemblage), which formed the basement for a subduction-related arc complex (Meen assemblage) after a 15 Ma hiatus. The Confederation assemblage is interpreted to represent an Archean back arc, where the complex interplay of mantle sources allows for the eruption of tholeiite, subduction-modified tholeiite, ocean island basalt-like basalt, and subduction-related arc-type volcanic rocks. The recognition of back-arc basins within the Meen-Dempster greenstone belt emphasizes a continuity of crustal growth processes from the Archean to the present day.

scholarly journals The Uitkomst intrusion and Nkomati Ni-Cu-Cr-PGE deposit, South Africa: trace element geochemistry, Nd isotopes and high-precision geochronology

2017 ◽  
Vol 53 (1) ◽  
pp. 67-88 ◽  
Author(s):  
W.D. Maier ◽  
S.A. Prevec ◽  
J.S. Scoates ◽  
C.J. Wall ◽  
S.-J. Barnes ◽  
...  
Keyword(s):  
South Africa ◽  
Trace Element ◽  
High Precision ◽  
Trace Element Geochemistry ◽  
Nd Isotopes ◽  
Element Geochemistry
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