Rare-earth elements and Stable Isotope Geochemistry of early Cambrian chert-phosphorite assemblages from the Lower Tal Formation of the Krol Belt (Lesser Himalaya, India)

1999 ◽  
Vol 156 (1-4) ◽  
pp. 275-297 ◽  
Author(s):  
A. Mazumdar ◽  
D.M. Banerjee ◽  
M. Schidlowski ◽  
V. Balaram
Keyword(s):  
Rare Earth ◽  
Stable Isotope ◽  
Rare Earth Elements ◽  
Isotope Geochemistry ◽  
Early Cambrian ◽  
Stable Isotope Geochemistry ◽  
Lesser Himalaya

Stable isotope geochemistry and palynology of the late Precambrian to Early Cambrian sequence in Newfoundland

1992 ◽  
Vol 29 (8) ◽  
pp. 1662-1673 ◽  
Author(s):  
Harald Strauss ◽  
Stefan Bengtson ◽  
Paul M. Myrow ◽  
Gonzalo Vidal
Keyword(s):  
Stable Isotope ◽  
Organic Carbon ◽  
Isotope Geochemistry ◽  
Depositional Environments ◽  
Early Cambrian ◽  
Bacterial Sulfate Reduction ◽  
Stable Isotope Geochemistry ◽  
Forming Process ◽  
Late Precambrian ◽  
Clastic Sediments

A sequence of clastic sediments in southeastern Newfoundland straddling the Precambrian–Cambrian boundary has been investigated for its stable isotope geochemistry of carbon and sulfur and acid-resistant organic-walled microfossils. A detailed study of the Chapel Island Formation, which includes the boundary interval, has revealed fluctuations in the isotopic composition of organic carbon. These are largely interpreted as caused by differences in the depositional environments. Highly variable sulfur isotopic compositions indicate bacterial sulfate reduction as a pyrite-forming process, sometimes under sulfate-limited conditions. Palynological results are quite limited with respect to diagnostic microfossils.

Intelligent prediction of stable isotope geochemistry of coalbed gas for its origin

2021 ◽  
Author(s):  
MOHAMMAD ASIF ◽  
Lei Wang ◽  
Randy Hazlett ◽  
Yu-Shu Wu ◽  
Keka Ojha
Keyword(s):  
Stable Isotope ◽  
Isotope Geochemistry ◽  
Stable Isotope Geochemistry ◽  
Coalbed Gas
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