Depositional age, provenance, and tectonic implications of Neoproterozoic sedimentary rocks in the Xiangshan area, South China,Geological Journal

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Depositional age, provenance, and tectonic implications of Neoproterozoic sedimentary rocks in the Xiangshan area, South China
Geological Journal ( IF 1.4 ) Pub Date : 2020-10-11 , DOI: 10.1002/gj.4000
Kai‐Xing Wang _{1,

2,

3} , Li‐Qiang Sun ₁ , Tao Sun ₁ , Hui Huang ₃

Affiliation

Detrital zircon U–Pb–Hf isotopes and whole‐rock geochemical compositions of exposed Neoproterozoic sedimentary rocks in the Xiangshan area are determined to discuss provenances and the boundary between the Yangtze and Cathaysia blocks. Zircon dating results reveal that the exposed Precambrian sedimentary rocks in the Xiangshan area were deposited in the Late Neoproterozoic era. The age spectra and whole‐rock geochemistry show that the detrital materials of the Shenshan Formation originated from the Yangtze Block and that the detritus of the Kuli and Shangshi formations came mainly from the Yangtze Block and partly from the Cathaysia Block. The source for the Neoproterozoic sedimentary rocks in the Xiangshan area may been intermediate rocks, mainly from a mixture of felsic and mafic rocks in the Yangtze Block. In combination with previous studies, we suggest that the Xiangshan area belonged to the Cathaysia Block before the amalgamation between the Cathaysia and Yangtze blocks and that the real boundary between the two blocks is located in the northern part of the Xiangshan area.

中文翻译：

华南象山地区新元古代沉积岩的沉积年龄，物源及构造意义

确定了香山地区裸露的新元古代沉积岩的碎屑锆石U–Pb–Hf同位素和全岩地球化学组成，以讨论物源以及长江与华夏地块之间的边界。锆石测年结果表明，香山地区裸露的前寒武纪沉积岩沉积于新元古代晚期。年龄谱和全岩地球化学表明，神山组的碎屑物质起源于扬子地块，库里和上市组的碎屑主要来自扬子地块，而部分地源于华夏地块。象山地区新元古代沉积岩的来源可能是中间岩，主要来自扬子地块的长英质和镁铁质混合岩。结合以前的研究，

更新日期：2020-10-11

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