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Abstract:
In addition to overall uplift of the Qiabuqia region during the Late Cenozoic, three deformation stages can be identified in the northeastern Qinghai-Tibet Plateau. Specifically, these deformation stages were recognized in areas east of the Gonghe Basin that surrounds Waliguan Mountain and include: 1) Late Miocene to Late Pliocene deformation-dominated by thrust napping with dextral strike-slipping; 2) Early Pleistocene to late middle period of Pleistocene deformation-fault structures were dominated by the dextral strike-slipping with thrust napping; and 3) end of Late Pleistocene to Middle Holocene deformation-thrust napping slowed down and finally braked, while the shallow surface began to loosen and extend at Qiabuqia region's rear-edge. DR4 borehole drilling data indicate that the Xiangshuihe Formation's buried depth is similar to 1,000 m. The Xianshuihe Formation's top section is characterized by normal fault-type (NF) tectonic stress, while the maximum principal tectonic stress (sigma 1) is perpendicular and the minimum principal tectonic stress (sigma 3) is horizontal. In contrast, the deep basement is characterized by thrust fault (TF) and strike-slip (SS) tectonic stress, while the sigma 1 is in the NE-SW direction, ranging from 20.1 degrees to 75.3 degrees with an average of 40.0 degrees. Based on the aforementioned observations, it can be inferred that there are three sets of hidden faults in the basement of the Qiabuqia region: 1) the NW-NNW trending compressional-torsional faults; 2) the NE trending tensional-torsional faults; and 3) the NWW trending compressional-torsional faults. The findings in this study can potentially offer a robust geological basis for exploring and utilizing hot, dry rock resources within the Gonghe Basin.
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FRONTIERS IN EARTH SCIENCE
ISSN: 2296-6463
Year: 2023
Volume: 10
2 . 0
JCR@2023
2 . 0 0 0
JCR@2023
ESI Discipline: GEOSCIENCES;
ESI HC Threshold:26
JCR Journal Grade:3
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 1
SCOPUS Cited Count: 2
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
Affiliated Colleges: