地质学报（英文版）2010，Vol.84Issue(5)：1286-1293,8.
Tectono-thermal Evolution in the Bachu Uplift,Tarim Basin,China
Tectono-thermal Evolution in the Bachu Uplift,Tarim Basin,China
摘要
Abstract
The thermal evolution of source rocks in the Paleozoic has long been a problem to petroleum exploration in the Bachu uplift,Tarim basin,since the thermal history in the Paleozoic could not be rebuilt objectively due to lack of effective thermal indicators in the Lower Paleozoic successions.The apatite and zircon(U-Th)/He thermochronometry can be used as a new kind of technique to study the thermal history and tectonic uplift of sedimentary basins.Based on the measured apatite and zircon(U-Th)/He ages,apatite fission track data and equivalence vitrinite reflectance(%EVRo),the tectonothermal histories in 5 wells of the Bachu uplift were modeled.The modeling results show that there was relatively high gradient at the Early Paleozoic in the Bachu uplift and it decreased gradually during the entire Paleozoic: 33-35℃/km in the CambrianOrdovician,32-33℃/km in the Silurian-Devonian,30-32℃/km at the end of Carboniferous and 27.5-31℃/km at the end of Permian.Therefore,the thermal history can be modeled by combining multiple thermal indicators of AFT,(U-Th)/He ages and EVRo data.Especially,this provides a new method to rebuild the thermal history for the Low Paleozoic carbonate successions in the Tarim Basin.关键词
(U-Th)/He/thermochronometry/apatite/zircon/fission track/equivalence vitrinite reflectance(/EVRo)/Bachu upliftKey words
(U-Th)/He/thermochronometry/apatite/zircon/fission track/equivalence vitrinite reflectance(/EVRo)/Bachu uplift分类
天文与地球科学引用本文复制引用
QIU Nansheng,JIANG Guang,MEI Qinghua,WANG Shengjun..Tectono-thermal Evolution in the Bachu Uplift,Tarim Basin,China[J].地质学报（英文版）,2010,84(5):1286-1293,8.基金项目
The National Major Fundamental Research and Development Project(2005CB422102),Notional Key Project for Oil and Gas(2008ZX05007-03)and Key Project of SINOPEC provided financial support for this work. （2005CB422102）
