再论海南岛及大陆东南沿海的海西地槽与铁矿找矿问题
来源期刊:中南大学学报(自然科学版)1980年第3期
论文作者:袁奎荣 梁金城 朱敏达
文章页码:1 - 11
关键词:中国科学院; 海南岛西部; 活动区; 上古生界; 东南沿海; 海西褶皱带; 碎屑岩; 地槽; 铁矿床; 海西期花岗岩
摘 要:本文是一九七七年《海南岛西部海西地槽的发现及其对找铁矿的意义》一文的续篇。作者补充了一九七七年后海南岛区域地质调查及找矿工作所获得的最新资料以及闽、浙沿海、粤东、桂东南地区近年来工作的新成果。对华南东角沿海海西褶皱带的沉积建造、岩浆活动、构造变动及区域变质作用等特征;海西褶皱带的空间展布以及地槽的发展过程进行了初步总结。在归纳闽、粵一带上古生界主要沉积变质(或热液迭加)型铁矿特征的基础上,指出了在华南寻找这一类型铁矿的重要性。此外,作者还对华南大陆地壳的演化、海西期花岗岩以及沉积变质型铁矿的关系等问题提出了自己的看法。
Abstract: This paper is a sequel to the article“The discovery of Hercynian Geo-syncline in the west part of Hainan Island and its significance in iron pro-specting”(1977).The anthors have supplemented herein the data of regional geologicalsurvey and prospecting in Hainan Island since 1977,as well as the newachievements in geological work in the coast region of Fujian and Zhejiangprovinces,in the east part of Guangdong and S.E.Guangxi.Preliminaryconclusion is drawn on the characteristics of sedimentary formations,mag-matic activities,tectonic disturbances,and regional metamorphism of theHercynian belt of folded strata on the S.E.Coast of China,on the extens-ion of the Hercynian zone of fold and on the evolution of the geosyncline.In summing up the characteristics of the Late Palaeozoic sedimentary-metamorphic(or hydrothermal superimposed)iron deposits in the provincesof Guangdong and Fujian,the anthors have pointed out the importance toexplore iron ores of this type in South China.Besides,the anthors have presented their own views on the relationsbetween the evolution of the earth′s crust of the South China mainland,theHercynian granites and the sedimentary-metamorphic iron deposits.