Home > Archive>Volume 98, Issue 5, 2024 >1244-1254. DOI:10.1111/1755-6724.15214
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This study was supported by funding from the National Key Research and Development Program of China (Grant No. 2022YFF0800100) and National Natural Science Foundation of China and the China Geological Survey (Grant No. U2244210). The authors are grateful to Dr. Xie Qiuhong, Dr. Gao Zhaofu and two anonymous reviewers for their constructive comments and suggestions, which substantially improved this manuscript.

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    Abstract:

    The Tarim Craton is an ancient Precambrian continental block, and detailed knowledge of its thermo-tectonic history is crucial for understanding the early history of continental evolution. Abundant layered mafic rocks, which have commonly been regarded as basalts, occur within the Ediacaran Sugetbrak Formation (Fm.) in the Aksu region of the northwestern Tarim Craton. Clear intrusive features have now been discovered, including mafic rocks truncating Ediacaran sedimentary layers, exhibiting an intrusion-baked margin where they interact with both the overlying and bottom wall rocks, and displaying a fine-grained transition zone from their interior to their margins. The new findings demonstrate that these mafic rocks within the Aksu Ediacaran strata were not erupted basalts but instead are intrusive diabase dykes. Therefore, these mafic rocks cannot be used to constrain the timing of the Sugetbrak Fm. in the Aksu area, nor as marker layers for regional stratigraphic correlation. Furthermore, the Ediacaran thermo-tectonic evolution in this region, deduced from the assumption that the mafic rocks are lavas, needs to be revised.

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XIE Hongzhe, ZHU Xiangkun, WANG Xun, HE Yuan, SHEN Weibing.2024.[J]. Acta Geologica Sinica(),98(5):1244-1254

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History
  • Received:December 24,2023
  • Revised:April 19,2024
  • Online: October 25,2024
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