中国区域成矿特征探讨

SOME FEATURES OF REGIONAL METALLOGENY OF CHINA

中国矿产资源特征主要是由中国的地质构造特点和地质成矿历史所决定的。中国区域成矿的基本特点包括 :①成矿时代齐全 ,成矿区域多样 ;②古陆边缘矿床集中 ;③叠加复合成矿作用显著 ;④花岗岩类成矿规模巨大 ;⑤构造成矿控矿明显以及其它等。为进一步深入研究中国大陆的成矿特征 ,提出 3个重要课题 :①中国古陆块的分合对成矿的制约 ;②中国大陆活动性与稳定性的辩证认识 ,并注意在稳定地块中找矿 ;③研究深部矿床赋存规律开拓深部探矿新领域。我国现阶段还处在浅部探矿和采矿阶段 ,在若干大型矿集区中还应存在第二个找矿空间 ,即深约 5 0 0～ 15 0 0m的深部空间 ,在这个空间中有可能实现找矿突破。

The features of mineral resources of China depended on the characteristics of geological structures and geologic-metallogenic history of China. The basic characteristics of China regional mineralization contains: ① the metallogenic epochs almost cover all the geohistory and the metallogenic regions are diversiform; ② most of the ore deposits occur on the palaeo-continental margins; ③superimposed and compound mineralization is significant; ④mineralization of crust-derived granite is extensive; ⑤ore formation caused and controlled by tectonic dynamic activities is obvious. To further study the metallogenic characteristics of the China continent, the author brings forward three problems for discussion: ①to reconstruction the 'open' and 'close' of China palaeo-continent and its affect to mineralization; ② the dialectical analysis to activity and stability of China continent and paying attention to exploration in stable massif ('safety island'); ③study the geocontrols of deep ore deposits .At last the author points out that China lies in on the stage of superficial prospecting and mining and there should be the second exploring space such as below 500~1500m in several large-scale ore clusters, where exits the probability of prospecting breakthrough.