摘要:
笔者对宁芜火山岩区隐爆角砾岩体进行了调查,将其划分为三种类型。并对凹山等角砾岩体从资料分析和纵深的采掘现场观察,确认它们属隐爆成因。是浅源岩浆体在封闭条件下,经分导、演化、冷却、减压、发泡,沸腾和爆炸等一系列物理化学变化中形成的。与含矿残浆、气液受同一士地热场,地球化学场变化所控制,因而有密切的时空联系。对寻找隐伏矿体提供了线索。
Abstract:
On the basis of an investigation, the cryptoexplosion breccia bodies in the Nanjing-Wuhu volcanic terrane is classified into three types. From an analysis of the data and observations of the deeply excavated site of the Aoshan breccia body and others, it has been confirmed that they are of cryptoexplosion origin. They were formed through a series of physico-chemical changes such as differentiasion. evolution, cooling, pressure-releasing, ebullition, boiling and explosion under closed conditions. They were controlled by the same paleogeothermal and geochemical field as the ore-bearing residual magma and fluids and thus were closely related to the latters in space and time. So they can furnish clues leading to the discovery of hidden orebodies.
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