引用本文:	时英民,李坤业,杨惠兰,张秀莲,何丽娟.东海DC-2孔岩芯粘土矿物组合及其分布特征[J].海洋科学,1988,12(2):13-19.

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东海DC-2孔岩芯粘土矿物组合及其分布特征
时英民¹, 李坤业¹, 杨惠兰¹, 张秀莲¹, 何丽娟¹
中国科学院海洋研究所

摘要:

DC-2孔柱状岩芯取样深度为48.6m,粘土矿物组分以伊利石为主,其次为绿泥石、高岭石和蒙脱石。岩芯共分6个粘土矿物组合层,参考Mn/Fe计算结果,0—29.46m为浅海相;33.42—33.46m为淡水相;38.44—38.46m为浅海相;44.0—48.06m为淡水相沉积。综合研究表明该沉积段出现二次海进和一次海退。

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基金项目:

CLAY MINERAL ASSEMBLAGE AND THEIR DISTRIBUTION CHARACTERISTIC IN SEDIMENTS IN CORE DC-2 FROM THE EAST CHINA SEA

Abstract:

The major constituent of clay minerals are illite, chlorite, kaolinite and montmorillonite in core DC-2. Six clay mineral assemblage form are recorded from bottom to top in the core according to their content of kaolinite and montmorillonite. In the sedimentary process, montmorillonite content had two stages of increase, kaolinite had two stages of decrease, Mn/Fe value changed regularly, which shows that there occurred two transgressions and one regression at about 50m depth.

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