Anatomy of a forearc submarine fan: Upper Eocene-Oligocene Andaman Flysch Group, Andaman Islands, India

被引：41

作者：

Chakraborty, PP ^{[1
]}

Pal, T

机构：

[1] Indian Sch Mines, Dept Appl Geol, Dhanbad 826004, Bihar, India

[2] Geol Survey India, Kolkata 700016, W Bengal, India

来源：

GONDWANA RESEARCH | 2001年 / 4卷 / 03期

关键词：

Andaman flysch; facies; submarine fan; paleocurrent; sequence;

D O I：

10.1016/S1342-937X(05)70347-6

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Detailed facies analysis in the upper Eocene-Oligocene Andaman Flysch Group reveals fourteen different facies, grouped into three different associations. These facies associations represent two anatomical divisions of a submarine fan, viz. inner fan and depositional lobe in middle fan. Paleocurrent pattern, high percentage of quartz in the sandstones and outer are derived clasts in the inner fan channel conglomerates suggest dual sediment supply in this fan. A longitudinal geometry of the basin has been inferred where juxtaposition of sediments of different proximality deterred development of any definite sequence pattern. A tectonically induced active sediment supply in a rising sea level stand is thought to be responsible for development of the fan.

引用

页码：477 / 486

页数：10

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