Re–Os isotope study of Indian kimberlites and lamproites: Implications for mantle source regions and cratonic evolution

2013 ◽  
Vol 353 ◽  
pp. 36-47 ◽  
Author(s):  
N.V. Chalapathi Rao ◽  
R.A. Creaser ◽  
B. Lehmann ◽  
B.K. Panwar
Keyword(s):  
Mantle Source ◽  
Source Regions ◽  
Isotope Study ◽  
Os Isotope

The Aguablanca Ni-Cu Deposit: A Re-Os Isotope Study

2008 ◽  
Vol 50 (10) ◽  
pp. 948-958 ◽  
Author(s):  
Ryan Mathur ◽  
Fernando Tornos ◽  
Fernando Barra
Keyword(s):  
Isotope Study ◽  
Os Isotope

scholarly journals Similar V/Sc Systematics in MORB and Arc Basalts: Implications for the Oxygen Fugacities of their Mantle Source Regions

2005 ◽  
Vol 46 (11) ◽  
pp. 2313-2336 ◽  
Author(s):  
CIN-TY AEOLUS LEE ◽  
WILLIAM P. LEEMAN ◽  
DANTE CANIL ◽  
ZHENG-XUE A LI
Keyword(s):  
Mantle Source ◽  
Source Regions

Os-isotope study of platinum-group minerals in chromitites in Alpine-type ultramafic intrusions and the associated placers in Borneo

1992 ◽  
Vol 56 (383) ◽  
pp. 157-164 ◽  
Author(s):  
Keiko Hattori ◽  
Klaus-Peter Burgath ◽  
Stanley R. Hart
Keyword(s):  
Igneous Rocks ◽  
Chemical Inhomogeneity ◽  
Minor Variation ◽  
Platinum Group Minerals ◽  
Isotope Study ◽  
Platinum Group ◽  
Individual Grains ◽  
A Minor ◽  
Os Isotope

Abstract187Os/186Os ratios were determined for in-situ laurite grains in Alpine-type chromitites and platinumgroup minerals (PGM) in the associated alluvial placers in Borneo, Indonesia/Malaysia. The Osisotope ratios of laurite grains in chromite defne an 187Os/186Os ratio for the 100 Ma mantle source of c. 1.04. Thelow 187Os/186Os ratios in all grains confirm the essential derivation of these platinum-group elements (PGE) from the mantle. A minor variation in 187Os/186Os ratios was detected among PGM from placers, but no variation was found within individual grains, including a grain with chemical inhomogeneity. The values are similar to those for PGM in the associated chromitites. The data are consistent with a detrital origin of PGM in placers: the placer PGM originated in the ultramafic section of ophiolities and the release of these grains from igneous rocks and their deposition in placers was almost entirely by mechanical processes.

scholarly journals Re-Os isotope and platinum group elements of a FOcal ZOne mantle source, Louisville Seamounts Chain, Pacific ocean

2015 ◽  
Vol 16 (2) ◽  
pp. 486-504 ◽  
Author(s):  
Maria Luisa G. Tejada ◽  
Takeshi Hanyu ◽  
Akira Ishikawa ◽  
Ryoko Senda ◽  
Katsuhiko Suzuki ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Mantle Source ◽  
Platinum Group Elements ◽  
Platinum Group ◽  
Focal Zone ◽  
Os Isotope
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