Multiple cooling episodes in the Central Tarim (Northwest China) revealed by apatite fission track analysis and vitrinite reflectance data

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• 作者：Jian Chang ; Nansheng Qiu ; Xinying Song ; Huili Li
• 刊名：International Journal of Earth Sciences
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：105
• 期：4
• 页码：1257-1272
• 全文大小：3,262 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geology
  Geophysics and Geodesy
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1437-3262
• 卷排序：105

文摘

Apatite fission track and vitrinite reflectance are integrated for the first time to study the cooling history in the Central Tarim, northwest China. The paleo-temperature profiles from vitrinite reflectance data of the Z1 and Z11 wells showed a linear relationship with depth, suggesting an approximately 24.8 °C/km paleo-geothermal gradient and 2700–3900 m of erosion during the Early Mesozoic. The measured apatite fission track ages from well Z2 in the Central Tarim range from 39 to 159 Ma and effectively record the Meso–Cenozoic cooling events that occurred in Central Tarim. Moreover, two cooling events at 190–140 Ma in the Early Jurassic–Early Cretaceous and 80–45 Ma in the Late Cretaceous–Paleocene revealed by measured AFT data and thermal modeling results are related to the collisions of the Qiangtang–Lhasa terranes and the Greater India Plate with the southern margin of the Eurasian Plate, respectively. This study provides new insights into the tectonic evolution of the Tarim Basin (and more broadly Central Asia) and for hydrocarbon generation and exploration in the Central Tarim.KeywordsCentral TarimApatite fission trackVitrinite reflectanceCooling eventsTarim Basin