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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。
This article is a sequel to a paper entitled “The Discovery of the Hercynian Trough in the West of Hainan Island and Its Significance to the Exploration of Iron Ore in 1977”. The author supplements the latest information obtained from the regional geological survey and ore prospecting in Hainan Island after 1977 and the new achievements in recent years in the coastal areas of Fujian, Zhejiang, eastern Guangdong and southeast Guangxi. The sedimentary structures, magmatic activities, tectonic movements and regional metamorphism of the Hercynian fold belt along the East China Sea are also discussed. The spatial distribution of the Hercynian fold belt and the development of the trough are summarized. On the basis of summarizing the characteristics of major sedimentary metamorphism (or hydrothermal superposition) type iron deposits in the Paleozoic in the areas of Min and Yue, the importance of finding this type of iron ore in southern China is pointed out. In addition, the author also put forward his own views on the evolution of the crust in South China, the Hercynian granite and the relationship between sedimentary metamorphic iron ore and other issues.