论文部分内容阅读
本文用“地质历史分析”的方法,指出江西省北部地壳先后经历过:地槽、地台、地洼三个发展阶段。前两个阶段的不同时期,形成了七个建造类型不同的“矿源层”,为第三阶段的含矿岩浆提供了物质基础,当这种岩浆侵入到矿源层中时,常能形成多因复成矿床。 第三发展阶段与中生代西太平洋的“活动陆缘”密切相关,与活动陆缘走向横切的北西向张剪性基底大断裂带,常是重要的成矿带。
In this paper, we use the method of “geological history analysis” to point out that the crust in the northern part of Jiangxi Province has successively experienced three stages: the trough, the platform and the depression. At different periods of the first two phases, seven “source beds” of different types have been formed, which provide the material basis for the ore-bearing magma in the third stage. When this magma intrudes into the source bed, it often leads to multiple causes Complex mineral deposits. The third stage of development is closely related to the “active continental margin” of the Mesozoic western Pacific Ocean. The NW-trending shear-shear large basement fault zone transverse to the active continental margin is often an important metallogenic belt.