三论蒙阴地区金刚石原生矿的形成时代

Third Discussion on the Oreforming Age of Primary Diamond in Mengyin Area of Shandong Province

摘要:

该文以地质基本事实为依据，以地质构造发展史为主线，结合华北地台奥陶纪后演化史，以及石炭纪以后古金刚石砂矿储集层为佐证，再加金伯利岩切穿辉绿岩和煌斑岩脉的实证，都显示出蒙阴地区金刚石原生矿形成时代不在奥陶纪而在中生代。

Abstract:

In this paper, based on basic geological facts, regarding the history of geological structures as the main line, combining with Ordovician evolution history in North China platform, regarding ancient diamond placer reservoir after Carboniferous, the fact of kimberlite cutting through empirical diabase and lamprophyre dykes as the evidences, it is showed that the formation age of primary diamond ore in Mengyin area is not in Ordovician period. It should be in Mesozoic period.