Late Quaternary glacial cycle and precessional period of clay mineral assemblages in the Western Pacific Warm Pool

作     者：WU JiaWang,LIU ZhiFei * & ZHOU Chao State Key Laboratory of Marine Geology,Tongji University,Shanghai 200092,China 

出 版 物：《Science Bulletin》 (科学通报(英文版))

年 卷 期：2012年第Z2期

页      面：3748-3760页

学科分类：070704[理学-海洋地质] 0709[理学-地质学] 07[理学] 0707[理学-海洋科学] 

基　　金：supported by the National Natural Science Foundation of China (40925008 and 91128206) the National Basic Research Program of China(2007CB815906) 

主　　题：clay minerals glacial cycle precessional period Intertropical Convergence Zone(ITCZ) late Quaternary Western Pacific Warm Pool(WPWP) 

摘      要：Variability of clay mineral assemblages in the Western Pacific Warm Pool(WPWP) over the past 370 ka shows the prominent glacial-interglacial ***(62%-91%) is the dominant clay mineral,with decreased contents during interglacials while increased in *** contrast,variations in chlorite(4%-21%),illite(4%-12%),and kaolinite(2%-10%) share a similar pattern with higher contents during interglacials than glacials,mirroring to that of *** results indicate that the smectite-dominated clay minerals derive mainly from the river detrital inputs of New *** glacial-interglacial cycle of clay mineral assemblages well correspond to the fluctuation of sea *** the sea level was low,the river materials can travel more easily across the narrow shelf off the island of New Guinea,inject directly into the subsurface currents flowing westwards,then merge into the Equatorial Undercurrent(EUC),and eventually deposit on the central part of *** periods of the smectite content indicate the intensity of mechanical erosion in its provenance of New Guinea,responding to the river runoff and precipitation,and this could also be linked to the meridional migration of the Intertropical Convergence Zone(ITCZ).