scholarly journals Diamond genesis in the world’s largest diamondiferous eclogite, part II: in-situ isotope study of diamond and mineral inclusions

2019 ◽  
Keyword(s):  
Mineral Inclusions ◽  
Diamond Genesis ◽  
Isotope Study

Mechanistic Aspects of Pyrite Oxidation in an Oxidizing Gaseous Environment:  An in Situ HATR−IR Isotope Study

2005 ◽  
Vol 39 (19) ◽  
pp. 7576-7584 ◽  
Author(s):  
Courtney R. Usher ◽  
Kristian W. Paul ◽  
Jayakumar Narayansamy ◽  
James D. Kubicki ◽  
Donald L. Sparks ◽  
...  
Keyword(s):  
Pyrite Oxidation ◽  
Gaseous Environment ◽  
Isotope Study

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 Small Antarctic micrometeorites: A mineralogical and in situ oxygen isotope study

2005 ◽  
Vol 40 (6) ◽  
pp. 917-932 ◽  
Author(s):  
Matthieu GOUNELLE ◽  
Cécile ENGRAND ◽  
Michel MAURETTE ◽  
Gero KURAT ◽  
Kevin D. McKEEGAN ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Isotope Study

IN-SITU OXYGEN ISOTOPE STUDY OF TOURMALINE AND QUARTZ: INSIGHTS INTO THE PROGRADE TEMPERATURE HISTORY

2017 ◽  
Author(s):  
Barbara L. Dutrow ◽  
◽  
Katharina Marger ◽  
Benita Putlitz ◽  
Darrell J. Henry ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Temperature History ◽  
Isotope Study
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