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中国已經发現了金刚石砂矿床,因此一定也存在有原生矿床。下面談一下西伯利亚雅庫特地区的金刚石矿床,供同志們参考,希望能对中国同志在寻找原生金刚石矿床的工作中有所帮助。一、金伯利岩岩简分布的地质位置(见图1) 雅庫特的金伯利岩岩筒是分布在两个不同构造单元的邻接地区,即通古斯台向斜和安那巴德台背斜之間。在台背斜的隆起部分,出露的地层是古老的結晶片岩。褶皺和錯动在这里都較剧烈,其中并有閃长岩的侵入。在它的周围分布着震旦紀、寒武紀和奧陶紀的地层,褶皺较平緩。下古生代的地层,包括碳酸盐类岩在內,厚达2000米,其中有金伯利岩岩筒出現。
Diamond sand deposits have been discovered in China and there must have been primary deposits as well. Let’s talk about the diamond deposits in the Yakutia region of Siberia for your reference, hoping to help Chinese comrades in their search for native diamond deposits. 1. Geological location of kimberlite crags (see Figure 1) The kimberlite caves of Yakutia are located in the contiguous area of two different tectonic units, namely, the Tunguska syncline and the Annapurna anticline . In the uplift of the Taiwan anticline, the exposed strata are ancient crystalline schist. Folds and misplaced here are more intense, and there is a diorite intrusion. In its distribution around Sinian, Cambrian and Ordovician strata, fold more gentle. The Lower Paleozoic strata, including carbonate rocks, are up to 2,000 meters thick, with kimberlite barrels appearing.