The elementary stratigraphy of the middle Okinawa Trough since the last deglaciation

LIU Yan-guang; MENG Xian-wei; LI Tie-gang; WU Shi-ying; WANG Xiang-qin; XIN Chun-ying; REN Hong

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Article Navigation > Haiyang Xuebao > 2003 > 25(4): 50-58

LIU Yan-guang, MENG Xian-wei, LI Tie-gang, WU Shi-ying, WANG Xiang-qin, XIN Chun-ying, REN Hong. The elementary stratigraphy of the middle Okinawa Trough since the last deglaciation[J]. Haiyang Xuebao, 2003, 25(4): 50-58.

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The elementary stratigraphy of the middle Okinawa Trough since the last deglaciation

1.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of Marine Sedimentology & Environmental Geology, Qingdao 266061, China;Ocean University of China, Qingdao 266003, China
2.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of Marine Sedimentology & Environmental Geology, Qingdao 266061, China
3.
Institute of Oceanography, Chinese Academy of Sciences, Qingdao 266071, China

Received Date: 2002-01-25
Rev Recd Date: 2002-03-21

Abstract

Abstract

A gravity Core 180 was collected from the middle Okinawa Trough.The 305 cm long core was sampled at the interval of 5 cm.Twenty-three geochemical indexes of these samples were obtained on the basis of different analytical methods.According to the explanations for vertical changing regularity of the ratio of elements to A1₂O₃,δ¹⁸O records,clay mineral composition,grain size,combined with AMS¹⁴Cdetermination and factor analysis,Core 180 can be divided into five sections.The similar elementary combination characteristics exist in Sections 1,3 and 5,and different characteristics exist in Sections 2 and 4.Compared with detrital mineral and paleobiological analysis data,the distribution of the sedimentary compositions originated from continent,volcanic and biogenetic material has been discussed by means of correlation analysis of elementary geochemical behavior,elementary combination and sedimentary sources.The results show that the main sedimentary sources of the middle Okinawa Trough are terrigenous materials.But some essential changes maybe occur in the special layers due to the intensive influence of volcanic and biogenetic sediments.
- Okinawa Trough,
- last deglaciation,
- elementary stratigraphy

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References(23)

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