甘肃省成矿区(带)研究

STUDY ON METALLOGENIC PROVINCES(ZONES) IN GANSU PROVINCE

成矿区(带)是区域成矿学的核心内容,成矿区(带)的划分和研究是成矿规律认识的深化和科学表达,同时是具有矿产资源潜力的成矿单元,是服务于勘查决策的主要载体。文章根据全国成矿区(带)划分意见,对甘肃涉及的4个成矿域、8个成矿省及12个Ⅲ级成矿区带进行分析和研究,依据省内区域矿产空间分布的集中性和区域成矿作用的统一性原则,重点讨论矿床所处的大地构造环境、成矿作用与区域地质演化过程、容矿围岩时空分布一致性或相似性;参考区域地球化学场、地球物理场特征,划分Ⅳ级成矿区(带)26个,Ⅴ级成矿区(带)94个。明确各级成矿区带地质意义及显著特征。文章指出本次对甘肃省成矿区带的划分具有探索性,随着认识不断深化,成矿区带的研究和厘定将更加科学。

The theory of metallogenic province （zone） is the core parts of regional metallogeny, and the further deepening of understanding and the scientific expression on metallogenic pattern. The metallogenic province is the metallogenic unit which is potential of mineral, and the main basis for policy-making of exploration. In this paper, according to the scheme of national metallogenic provinces classification and in accordance with the principles of the concentration of regional mineral distribution in space and the unity of regional metallogenesis, 4 metallogenic provinces （class Ⅰ）, 8 provinces（class Ⅱ） and 12 zones of class Ⅲ related to Gansu are studied, the focuses of discussion are put on geotectonic environment of deposit, metallogene, the evolution of regional geology and the consistency or similarity of timely and spatial distribution of host rock, then, 26 metallogenic zones （class Ⅳ） and 94 zones （class Ⅴ） are divided with reference to the features of geochemical and geophysical fields.