孟加拉湾东经90°海岭中上新世以来沉积记录及亚洲季风

张振芳; 方念乔; 吴琳; 王建乔; 刘荣梅

Volume 29 Issue 2

Mar. 2004

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Article Navigation > Earth Science > 2004 > 29(2): 157-162

ZHANG Zhen-fang, FANG Nian-qiao, WU Lin, WANG Jian-qiao, LIU Rong-mei, 2004. Sedimentary Records and Asian Monsoon in Ninetyeast Ridge of Bay of Bengal since Pliocene Time. Earth Science, 29(2): 157-162.

Citation:

ZHANG Zhen-fang, FANG Nian-qiao, WU Lin, WANG Jian-qiao, LIU Rong-mei, 2004. Sedimentary Records and Asian Monsoon in Ninetyeast Ridge of Bay of Bengal since Pliocene Time. Earth Science, 29(2): 157-162.

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Sedimentary Records and Asian Monsoon in Ninetyeast Ridge of Bay of Bengal since Pliocene Time

1.
Development and Research Center, China Geological Survey, Beijing 100037, China
2.
Faculty of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China

Received Date: 2003-08-04
Publish Date: 2004-03-25

Abstract

Abstract

The pelagic sediments of Ninetyeast ridge have been synthetically analyzed through paleobiostratigraphy, carbonate stratigraphy, X-ray crystal powder diffraction and grain size analysis. The grain size of terrigenous sediments has been regarded as a cut-in in the discussion of sedimentation, sources and possible carrying mechanisms of the sediments. The source and carrying pattern of the terrigenous sediments have been supplemented further. The grain size of the terrigenous sediments can serve as an indicator of southeast monsoon or equatorial east wind. Its change not only reflects the volcanic activity of the source region of the terrigenous sediments but also indicates the wind strength. However, the quantity of the terrigenous sediments mainly depends on the erosion of the Tibetan plateau and Indian subcontinent and the runoff. The two aspects have been associated by the uplift of the plateau and its environmental effects.
- Ninetyeast ridge,
- grain size of terrigenous sediment,
- carbonate stratigraphy,
- Asian monsoon,
- Pliocene time

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References(22)

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