scholarly journals Exhumation history of the Karakoram fault zone mylonites: New constraints from microstructures, fluid inclusions, and 40Ar-39Ar analyses

Lithosphere ◽  
2012 ◽  
Vol 4 (3) ◽  
pp. 230-241 ◽  
Author(s):  
Barun K. Mukherjee ◽  
Koushik Sen ◽  
Himanshu K. Sachan ◽  
Sudip K. Paul
Keyword(s):  
Fault Zone ◽  
Fluid Inclusions ◽  
History Of ◽  
Karakoram Fault ◽  
Exhumation History

U–Pb SHRIMP and 40Ar/39Ar ages constrain the deformation history of the Karakoram fault zone (KFZ), SW Tibet

2011 ◽  
Vol 509 (3-4) ◽  
pp. 208-217 ◽  
Author(s):  
Shifeng Wang ◽  
Erchie Wang ◽  
Xiaomin Fang ◽  
Qingzhou Lai
Keyword(s):  
Fault Zone ◽  
Deformation History ◽  
History Of ◽  
Karakoram Fault

scholarly journals Fluid Inclusions Record Hydrocarbon Charge History in the Shunbei Area, Tarim Basin, NW China

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Ziye Lu ◽  
Yingtao Li ◽  
Ning Ye ◽  
Shaonan Zhang ◽  
Chaojin Lu ◽  
...  
Keyword(s):  
Fault Zone ◽  
Fluid Inclusions ◽  
Tarim Basin ◽  
Homogenization Temperature ◽  
Fault Zones ◽  
Carbonate Reservoirs ◽  
Fault System ◽  
Middle Ordovician ◽  
History Of ◽  
Hydrocarbon Charge

The exploration of deeply buried hydrocarbon is still a challenge for the petroleum geology. The Shunbei area is a newly discovered oil fields, located in the center of the Tarim Basin. The oil is mainly yielded from the Middle–Lower Ordovician carbonate reservoirs with depth > 7000  m in the Shunbei No. 1 and No. 5 fault zones. Calcite cements filled in vugs (v-calcite) and fractures (f-calcite) are identified in limestones and dolostones of the carbonate reservoirs. F-calcites in the Shunbei No. 1 fault zone trap secondary inclusions in trails, which comprise liquid-dominated biphase aqueous inclusions, liquid-dominated biphase oil inclusions, and/or oil-bearing triphase inclusions. F-calcite and v-calcite in the No. 5 fault zone trap secondary inclusions in trails, which consist of liquid-only monophase aqueous inclusions, liquid-dominated biphase aqueous inclusions, liquid-dominated biphase oil inclusions, liquid-only monophase oil inclusions, and/or oil-bearing triphase inclusions. The ranges of the homogenization temperature ( T h ) and ice-melting temperature ( T m − ice ) in the Shunbei No. 1 fault zone are, respectively, 130–150°C and -2.1–-1.5°C. The coexistence of liquid-only and liquid-dominated aqueous inclusions in the Shunbei No. 5 fault zone indicates that the aqueous inclusions are trapped at low temperatures. The aqueous inclusions in the Shunbei No. 5 fault zone show a range from -0.4 to -0.2°C in T m − ice which is very close to the meteoric fluid. In the context of the burial-thermal history and the Cambrian source rock evolution, the charging process of hydrocarbon in the Shunbei No. 1 and No. 5 fault zones corresponds to the Silurian and Middle Ordovician, respectively. Results of fluid inclusions indicate a tightly coupling relationship between the hydrocarbon charging process and fault system evolution in the Shunbei area. This study reveals the application of fluid inclusion under the systemically petrographic constraints to decipher the charging history of hydrocarbon, especially for the deeply buried reservoirs.

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