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In order to show the relationship between the grain size model and sedimentary environment of the East China Sea, typical samples have been selected from analytical data of 1233 surface sediments, and mathematical statistic analyses of these samples have been made. Based on these analyses and combined with the compositions of the sediments and history of its formation, the authors try to divide the genetic types of the sediments of the East China Sea, with focus on the discussion of the characteristics of ancient and present hydrodynamic environments. 相似文献
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各种地质营力如波浪、潮汐和海流都会对海底沉积物中的每种矿物产生影响,各种矿物也大多经历着搬运和沉积等过程。因此,能够利用沉积物中的矿物资料探讨其分布特征的控制因素。但是,东海区域广,沉积物类型较齐全,沉积时代不一,物质来源多,水动力条件十分复杂,给上述工作增加了困难。幸而,不同地区经受的地质作用过程和各种矿物对各种地质作用的反应并非一致。近岸区以现代细粒物质沉积为主,中、外陆架为残留沉积物分布区,而冲绳海槽区矿物成因以火山喷发作用为特征。就某一区域而言,某种矿物或矿物组合对某种地质作用或水动力条件反应特别敏感,因而也就 相似文献
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东海陆架残留沉积物的改造 总被引:7,自引:0,他引:7
1932年谢帕德(F.P.Shepard)根据当时的海图指出,亚洲东岸海底的沉积物普遍存在近岸细、远岸粗的特点.尔后,埃默里(K.O.Emery)等对远岸粗的这套沉积物进行了研究,认为在东中国海陆架外缘的粗沉积物是一套晚更新世低海面时堆积的、不为现代沉积物所覆盖的砂质沉积,并称之为“残留沉积”(Relict Sediment). 相似文献
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