从统计分析看控制东海重矿物分布的因素

任何地质作用过程都是复杂的,东海也不例外,其沉积过程具有长期性、继承性和叠加性的特点.因而反映在矿物组合及其分布变化上较为复杂,影响因素颇多.然而,运用数学地质方法却可帮助我们寻找和确定其主要的影响因素,查明它们的相互关系,甚至建立定量描述的模式.而这正是传统地质学研究中的难题之一.     

论冲绳海槽沉积物中金属球粒矿物的起源

In order to understand the origin of metal spherical minerals in the Okinawa Trough sediments, the authors have microscopically examined 215 samples (161 surface and 54 core samples) from 150 stations scattered in the shallow-sea continental shelf and trough areas,on the basis of the extensive studies of detrital minerals in the East China Sea continental shelf sediments. It is found that no metal spherical minerals occur either in surface or in core samples from sediments in the vast shallow-sea continental area, with an occurrence probability of zero, while in the narrow trough area the occurrence probability is 43% or more. And their distribution, either in. lateral or in vertical direction, shows an obvious regional speciality. This regional speciality is related to the assemblage type in which volcanoclastic minerals are predominant in the Okinawa Trough sediments, i.e., the occurrence probability of metal spherical minerals is proportional to the contents of pyroxene of volcanic origin and volcanic glass. A few metal spherical minerals are found enclosed within the volcanic glass. These facts strongly.indicate that metal spherical minerals in the Okinawa Trough sediments are of terrestrial rather than cosmic origin.     

海底地名译名审定会在杭召开

为了适应编辑《世界海洋地名录》的需要,使中文译名规范化,1987年4月17—18日在杭州召开了海底地名地理通名中译名审定会。中国地名委员会、国家测绘局测绘研究所、南京     

东海地质研究简史

本文在综合分析国内外有关东海调查研究资料的基础上,简要地总结了我国东海地质研究史。全文分我国对东海的调查研究与国外对东海的调查两个部分。前者又划分为4个时期:海洋地质知识的积累(自宋代至19世纪末);早期研究(20世纪初至新中国成立);初步发展时期(新中国成立至1976年)以及全面稳步发展时期(1977—)。