Provenance Analysis of Early Cretaceous Huixian-Chengxian Basin , Western Qinling Orogenic Belt , China
详细信息
- 责任者：Zhang Yingli (Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Wang Zongqi
- 刊名：Geological Bulletin of China
- 出版年：2011
- 卷期：30(1)
- 关键词：碎屑沉积物 ; clastic sediments ; 物源分析 ; provenance analysis ; 铀—铅计时 ; U-Pb dating ; 秦岭 ; Qinling Mountains
- 页码：p.37-50
- 图表：5 illus., 4 tables, 38 refs.
- 分类号：0803
- issnNo：ISSN1671-2552
- isbnNo：CN11-4648/P
摘要
Detrital zircon U-Pb ages of three samples from the granite and sandstones in Huixian-Chengxian Basin were measured by the LA-ICP-MS method. The sample of 09TB4, 09DPL25 and 09DPL41 respectively records 25, 89 and 123 age data. The granite boulder ages are shown in (210.8±0.6) Ma and (218.8±1.8) Ma, which are consistent with Miba granite age dated by Sun et al. Statistical analyses show that the provenances of Zhoujiawan Formation are 186~240 Ma and 629~1182 Ma rocks while main provenance ages of Jishan Formation are 179~233 Ma, 305~459 Ma and 632~1281 Ma. The study showed that the Lower Triassic-Permian rocks didn’t occur in southern margin of Huicheng Basin. There occured a few magmatic activities during 207 Ma (206 Ma), 448 Ma (428 Ma), 791 Ma (874 Ma) periods and developed regional metamorphism in 915 Ma (910 Ma) in the southern areas of Huicheng Basin.
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