| 东菲律宾海帕里西维拉海盆第四纪黏土矿物组合特征及物源分析 |
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| 引用本文： | 明洁,李安春,孟庆勇,万世明,闫文文.东菲律宾海帕里西维拉海盆第四纪黏土矿物组合特征及物源分析[J].海洋地质与第四纪地质,2012(4):139-148. |
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| 作者姓名： | 明洁 李安春 孟庆勇 万世明 闫文文 |
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| 作者单位： | 中国科学院海洋研究所海洋地质与环境重点实验室;中国科学院研究生院;国家海洋局第一海洋研究所 |
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| 基金项目： | 国家重点基础研究发展规划项目(2007CB411703) |
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| 摘 要： | 应用X射线衍射(XRD)方法对东菲律宾海帕里西维拉海盆的两个重力柱状样F090815和F100609的第四纪沉积物进行了黏土矿物分析。结果表明,南北两个柱状样黏土矿物呈现不同的组合特征。南部的F090815岩心蒙皂石含量(平均50%)最高,伊利石(平均37%)次之,含少量的绿泥石和高岭石(平均13%);北部的F100609岩心为伊利石含量(平均47%)最高,蒙皂石(平均39%)次之,含少量的绿泥石和高岭石(平均14%)。根据黏土矿物含量及特征变化可将两根柱状样划分为4段,并根据黏土矿物组合特征及化学指数和结晶度,认为蒙皂石主要来源于研究区东部紧邻的马里亚纳海槽基性火山物质的蚀变;伊利石主要来源于物理风化作用强烈的陆地,并很可能与亚洲风尘有关;绿泥石与伊利石有着相同的来源;高岭石在此区含量非常低,也证明了与伊利石和绿泥石来源相同。另外,两柱状样黏土矿物特征变化趋势不同,是由于整个F090815孔所揭示的地层大概只相当于F100609孔的第IV段沉积期,是该沉积期更高分辨率的反映。
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| 关 键 词： | 黏土矿物 物源 第四纪 东菲律宾海 帕里西维拉海盆 |
QUATERNARY ASSEMBLAGE CHARACTERISTIC AND PROVENANCE OF CLAY MINERALS IN THE PARECEVELA BASIN OF THE EAST PHILIPPINE SEA |
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| MING Jie,LI Anchun,MENG Qingyong,WAN Shiming,YAN Wenwen.QUATERNARY ASSEMBLAGE CHARACTERISTIC AND PROVENANCE OF CLAY MINERALS IN THE PARECEVELA BASIN OF THE EAST PHILIPPINE SEA[J].Marine Geology & Quaternary Geology,2012(4):139-148. |
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| Authors: | MING Jie LI Anchun MENG Qingyong WAN Shiming YAN Wenwen |
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| Institution: | 1 Key laboratory of Marine Geology and Environment,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China; 2 Graduate School,Chinese Academy of Sciences,Beijing 100049,China;3 First Institute of Oceanography,SOA,Qingdao 266061.China.) |
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| Abstract: | Using XRD method,the clay minerals of two Quaternary cores F090815 and F100609 located in Parece Vela Basin,East Philippine Sea were studied in this article.The results show that there are some differences in mineral assemblage between the north and the south.In the southern core F090815 the most abundant content is smectite(50%),then illite(37%),and the lowest is kaolinite and chlorite(13%);however,in the northern core F100609 the most abundant content is illite(47%),then smectite(39%),and the lowest is kaolinite and chlorite(14%).According to contents and characteristic of clay minerals,both the cores F090815 and F100609 can be divided into four parts.According to assemblage characteristic,chemical index and crystallinity of clay minerals,we think that smectites were originated from submarine basalt alteration in the Mariana Trough;while illites were derived mainly from the west continent under strongly physical weathering probabeg associated with the tormation of loess in the East Asia continent,so were kaolinite and chlorite. |
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| Keywords: | clay minerals provenance Quaternary East Philippine Sea Parece Vela Basin |
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