关于中国成矿域划分的讨论

Discussion on Division of Metallogenic Domains in China

成矿区(带)的划分是成矿规律研究的集中表现和矿产勘查的基础。作为一级成矿区带之成矿域乃指全球性成矿区带。在回顾了有关中国成矿域划分和研究的历史和讨论了相关问题后,依据"成矿省概念限用于主要构造事件内的构造阶段"的思想和"成矿域乃指全球性成矿区(带),受控于统一的全球动力学体系"的定义,并考虑到秦祁昆造山带的特殊性和前寒武纪地壳演化和成矿作用有异于显生宙者的特殊性,将中国显生宙以来Ⅰ级成矿区(带)分为古亚洲、秦祁昆、特提斯和滨太平洋4个成矿域。对古亚洲成矿域,因其范围十分宽广,就再将以古陆块为中心、缝合带为边界的古板块分为若干成矿亚域。对于前寒武纪成矿作用地区,文章不以"成矿域"称之,其成矿作用置于古亚洲、秦祁昆和特提斯诸成矿域中以基底成矿作用方式讨论之。

The division of metallogenic regions (zones), which is the key expression of the metallogenic regularity and the basis for the exploration of mineral resources, seems to be controlled by metallogenic settings and ore-controlled factors. The metallogenic domains, as the first rank metallogenic regions (zones), refer to the global metallogenic regions (zones) controlled by the global geodynamic systems. Having reviewed the history of the division of the metallogenic domains in China and discussed the relative problems, the author divides the Phanerozoic metallogtnic areas in China into 4 metallogenic domains of Paleo-Asiatic, Qinling-Qilian-Kulun, Tethys and Marginal Pacific, and subdivides the Paleo-Asiatic metallogenic domain into 6 metallogenic subdomains. Such a division is based on the concept of metallogenic provinces being restricted to tectonic time intervals within major tectonic events, the idea of metallogenic domain being roughly corresponding to tectonic domains, the recognition of the 3 Phanerzoic tectonic domains in China being respectively controlled by 3 global geodynamic systems, and the particularity of the Qinling-Qilian-Kulun orogenic zones and the Precambrian crustal evolution and metallogeny. The term of the previous Precambrian metallogenic domain is not adopted, and the Precambrian metallogeny should be discussed as the metallogeny of the basement in the relevant Paleo-Asiatic, Qinling-Qilian-Kulun and Tethys metallogenic domains.