DISTRIBUTION CHARACTERISTICS AND CONTROLLING FACTORS OF CLAY MINERALS IN SURFACE SEDIMENTS FROM THE CENTRAL AND SOUTHERN SOUTH CHINA SEA
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摘要: 利用南海中南部表层沉积物151个样品中黏土矿物的测试数据,计算了主要黏土矿物含量的平均值并编制分布图,据此分析黏土矿物的分布特征及其控制因素。南海中南部表层沉积物中的黏土矿物组合类型为伊利石-蒙脱石-高岭石-绿泥石,含量平均值依次为47%、19%、17%和16%。高岭石含量分布具有北部低、南部高的特点,与之对应的是蒙脱石矿物含量呈现北部高、南部低的趋势。伊利石和绿泥石含量分布规律不甚明显。前者呈现北部略高、南部稍低的分布趋势,含量变化起伏较大;后者的含量变化呈西北陆坡区稍偏低,其他部位含量分布均匀的趋势。伊利石/高岭石含量的比值变化与高岭石含量变化呈明显的负相关关系。从黏土矿物含量的分布规律来看,控制本区黏土矿物分布的主要因素有物源的搬运和输送、水动力条件变化、海底火山活动、地球化学环境影响等。Abstract: Based on clay mineral analysis data obtained from 151 surface sampling sites in the central and southern South China Sea, the average percent contents of four clay minerals have been accounted and the clay minerals percent content distribution have been illustrated on maps in this paper. And then, the distribution characteristics and their controlling factors have been interpreted.Clay minerals in the surface sediments of the central and southern South China Sea are illite, smectite, kaolinite and chlorite and their average percent contents are in tune 47%,19%,17% and 16%. Kaolinite percent content is low in the north and high in the south, and to the opposite, smectite, hige in the north and low in the south. Illite and chlorite percent content distributions have no obvious regularity. The distribution of the former goes a little higher in the north than in the south with large percent content undulation,and that of the latter is almost the same and only the difference is that the content is lower in the northwest. In addition, the ratio of illite/kaolinite percent content shows a negative interrelation with kaolinite percent content. The main factors that control the average percent content distributions of clay minerals are transportation of continental material, the variation of hydrodynamic condition, seabed volcano activities and geochemical environment.
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[1] Hathon E G,Underwood M B.Clay mineralogy and chemistry as indicators of hemipelagic sediment dispersal south of the Aleutian arc[J]. Marine Geology, 1991, 97(1):145-166.
[2] Naidu A S, Han M W, Mowatt T C, et al. Clay minerals as indicators of sources of terrigenous sediments, their transportation and deposition:Bering Basin, Russian Alaskan Arctic[J]. Marine Geology, 1995, 127(1):87-104.
[3] Petchick R, Kuhn Gand Gingele F. Clay mineral distribution in surface sediments of the South Atlantic:Sources, transport and relation to oceanography[J]. Marine Geology, 1996, 130(2):203-229.
[4] Graham I J, Glasby G P, Churchman G J. Provenance of the detrital component of deep sea sediments from the SW Pacific Ocean based on mineralogy, geochemistry and Sr isotopic composition[J]. Marine Geology, 1997, 140(1):75-96.
[5] 王文正,张经.欧洲罗纳河与中国几条主要河流悬浮物的矿物学组成分析[J].海洋与湖沼, 1994, 25(3):319-327. [WANG Wen-zheng, ZHANG Jing.Analysis on the mineral compositions of suspended matter from Rhone and some main Chinese rivers[J].Oceanologia et Limnologia Sinica, 1994, 25(3):319-327.]
[6] 周晓静,高抒,贾建军.长江黏土矿物示踪标记稳定性的初步研究[J].海洋与湖沼,2003, 34(6):683-692. [ZHOU Xiao-jing, GAO Shu, JIA Jian-jun.Preliminary evaluation of the stability of Changjiang clay mineral as fingerprints for material source tracing[J].Oceanologia et Liminologia Sinica, 2003, 34(6):683-692.]
[7] Park B K, D J Han. The distribution of clay minerals in recent sediments of the Koven Strait[J]. Sedimentary Geology, 1985, 41(1):173-184.
[8] 陈志华,石学法,韩贻兵,等.北冰洋西部表层沉积物黏土矿物分布及环境指示意义[J].海洋科学进展,2004, 22(4):446-454. [CHEN Zhi-hua, SHI Xue-fa, HAN Yi-bing, et al. Clay mineral distributions in surface sediments from the Western Arctic Ocean and their implications for sediment environments[J].Advances in Marine Science, 2004, 22(4):446-454.]
[9] 范德江,杨作升,毛登,等.长江与黄河沉积物中黏土矿物及地化成分的组成[J].海洋地质与第四纪地质, 2001, 21(4):7-12. [FAN De-jiang, YANG Zuo-sheng, MAO Deng,et al.Clay minerals and geochemistry of the sediments from the Yangtze and Yellow Rivers[J].Marine Geology and Quaternary Geology, 2001, 21(4):7-12.]
[10] 蓝先洪,马道修,徐明广,等.珠江口晚第四纪沉积物中黏土矿物及其指相意义[J].台湾海峡, 1988,7(2):127-134. [LAN Xian-hong, MA Dao-xiu, XU Ming-guang,et al. Clay and index facies of late Quaternary sediment in Zhujiang Mouth[J].Taiwan Strait, 1988,7(2):127-134.]
[11] 蓝先洪, 姚伯初.论南海西部海域沉积物中的黏土矿物[C]//南海西部海域地质构造特征和新生代沉积.北京:地质出版社,1999:102-110.[LAN Xian-hong, YAO Bo-chu.Clay surface sediments in the Western South China Sea[C]//Geological and Tectonic Characteristics and Cenozoic Sedimentation of the Western South China Sea. Beijing:Geological Publishing House, 1999:102 -110.]
[12] 刘志飞.南海南部晚第四纪东亚季风演化的黏土矿物记录[J].中国科学D辑, 地球科学,2004,34(3):272-279. [LIU Zhi-fei.Clay record of the East Asia monsoon in late Quaternary, the Southern South China Sea[J].Science in China (Series D), 2004, 34(3):272-279.]
[13] 唐松,邵磊,赵泉鸿.南海渐新世以来黏土矿物的演变特征及意义[J].沉积学报,2004,22(2):337-342. [TANG Song, SHAO Lei, ZHAO Quan-hong.Characteristics of clay mineral in South China Sea since Oligocene and its significance[J].Acta Sedimentological Sinica,2004,22(2):337-342.]
[14] 李国刚.中国近海表层沉积物中黏土矿物的组成、分布及地质意义[J].海洋学报,1990, 12(4):470-479. [LI Guo-gang.Clay component, distribution and geological significance in surface sediments of offshore in the China Sea[J].Oceanologia Sinica, 1990, 12(4):470-479.]
[15] 邱燕,姚伯初,李唐根,等.南海西部中建南盆地地质构造特征[C]//南海西部海域地质构造特征和新生代沉积.北京:地质出版社,1999:56-70.[QIU Yan, YAO Bo-chu, LI Tang-geng,et al. Geological and tectonic features and hydrocarbon potential of the Zhong jiannan Basin, the western South China Sea[C]//Geological and Tectonic Characteristics and Cenozoic Sedimentation of the Western South China Sea. Beijing:Geological Publishing House, 1999:56 -70.]
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