Provenance of Sediments Filling a Paleo-Channel that Formed on the Western Yellow Sea Continental Shelf During the Last Glacial Period |
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Authors: | Xianghuai Kong Junqiang Zhang Weiming Bai Jian Liu |
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Institution: | 1.Key Laboratory of Marine Environmental Geology, Ministry of Natural Resources,Qingdao Institute of Marine Geology,Qingdao,China;2.Laboratory of Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao,China;3.Institute of Geology and Paleontology of Linyi University,Linyi,China;4.Qingdao Geo-Marine Engineering Survey,Qingdao,China |
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Abstract: | Several buried paleo-channels are located on the continental shelf of the western Yellow Sea. Research on the paleochannels is significant for both theoretical studies and practical applications. In this paper, we analyse and discuss the mineralogy of sediments in a core (SYS-0803) recovered from a buried paleo-channel on the continental shelf of the western Yellow Sea. The aim is to determine the provenance of sediments that fill the paleo-channel. The heavy mineral assemblage of sediments in the core consists of schistose minerals, common hornblende, epidote, and ilmenite. The light mineral assemblage consists of plagioclase, quartz, lithic fragments, and K-feldspar. Analysis of the compositional maturity of the sand fraction revealed a quartz/feldspar ratio of < 1. A relatively high percentage of smectite is recorded throughout the entire paleo-channel fill, with the greatest percentage in the middle to lower parts. The detrital mineral assemblage and clay mineral content indicate that the paleo-channel sediments were sourced mainly from the Huanghe River during the last glacial period. |
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