Preliminary Investigation on Depositional Environment of Black Mud in Lower Cretaceous, Zhejiang and Fujian Provinces: Micropaleontology and Organic Geochemical Evidences
- Received Date: 1900-01-01
- Rev Recd Date: 1900-01-01
- Publish Date: 2010-12-10
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Key words:
- Zhejiang and Fujian provinces
Abstract: Sedimentary rocks of lower Cretaceous widely distribute in volcaniccovered area in Zhejiang and Fujiang provinces, southeast China, and its sedimentary environment that whether it has been influenced by marine water is still controversial. Though carefully observation in outcrops, we have systematically sampled dark sedimentary rocks, including Bantou Formation (K1b) in Fujian province, Shouchang Formation (K1s) and Guantou Formation (K1g) in Zhejiang province. Under microscope, besides high plant, marine fossils such as red algae and brown algae, were found in these samples. Organic geochemistry features, such as lower γ/ C30 hopanoid values (range from 0.11 to 0.18, 0.14 on average) and C30 rearrangement hopanoid, are furthermore to approve the marine influence. Combining with geological background, it is presupposed that it is mainly influenced by paleoPacific.
Citation: | XIE Xiaomin. Preliminary Investigation on Depositional Environment of Black Mud in Lower Cretaceous, Zhejiang and Fujian Provinces: Micropaleontology and Organic Geochemical Evidences[J]. Acta Sedimentologica Sinica, 2010, 28(6): 1108-1116. |