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JOPC  2024, Vol. 26 Issue (3): 655-670    DOI: 10.7605/gdlxb.2024.01.010
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Provenance characteristics of the Permian Shihezi Formation in Luonan area: implication for uplift processes of southern margin of North China Block
YANG Wentao, FU Qiang, FANG Te
School of Resources and Environment,Henan Polytechnic University,Henan Jiaozuo 454003, China
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Abstract  Uplift processes of the southern margin of the North China Block are of great significance for understanding interactions between the Qinling Orogenic Belt and the North China Basin. Based on sedimentary facies analysis,this paper studies the detrital zircon U-Pb geochronology and fission track chronology of the Permian Shihezi Formation in Luonan area,and discusses the source characteristics and uplift processes of the southern margin of the North China Block. It is expected to provide a sedimentary constraint for the subduction time of the Mianlue Ocean Basin and provide a possible source area for the Triassic recycled sediments in the southern North China Basin. The results show that the Permian Shihezi Formation in Luonan area experienced an upward change in sedimentary facies from alluvial fan to braided river,and then to delta. The sample from the lower part of the strata contains three groups of U-Pb ages,i.e.,353-280 Ma,1139-400 Ma,and 2620-1306 Ma. The fission track ages are decomposed into three peaks of 199 Ma,255 Ma,and 408 Ma. The sample from the upper part of the strata contains two U-Pb age groups,i.e.,339-259 Ma and 2655-1700 Ma,and the fission track ages were decomposed into three peaks of 205 Ma,268 Ma and 656 Ma. The results show that the southern margin of the North China Block received sediment from the Qinling Orogenic Belt during the early sedimentary period of the Shihezi Formation,but the sediments mainly came from the northern margin of the North China Block in the late depositional stage. The tectonic pattern had been transformed from high in the south to high in the north in this time. The initial uplift of the southern margin of the North China Block occurred during the Middle-Late Permian,which was related to the initial subduction of the Mianlue Ocean Basin,and became a potential provenance area to the Triassic strata in the south of the North China Basin.
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YANG Wentao
FU Qiang
FANG Te
Key wordsNorth China Block      Qinling Orogenic Belt      Permian      provenance analysis      detrital zircon     
Received: 17 May 2023     
ZTFLH: P512.2  
Fund:Co-funded by the National Natural Science Foundation of China(No. 42072123) and the Outstanding Youth Science Foundation of Henan Province(No. 222300420046)
About author: YANG Wentao,born in 1984,is an associate professor with Ph.D. degree. He is currently engaged in the researches on sedimentology and geology of orogenic belt. E-mail: ywtao125@163.com.
Cite this article:   
YANG Wentao,FU Qiang,FANG Te. Provenance characteristics of the Permian Shihezi Formation in Luonan area: implication for uplift processes of southern margin of North China Block[J]. JOPC, 2024, 26(3): 655-670.
YANG Wentao,FU Qiang,FANG Te. Provenance characteristics of the Permian Shihezi Formation in Luonan area: implication for uplift processes of southern margin of North China Block[J]. JOPC, 2024, 26(3): 655-670.
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http://www.gdlxb.cn/EN/10.7605/gdlxb.2024.01.010     OR     http://www.gdlxb.cn/EN/Y2024/V26/I3/655
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