碳沥青中几种钒、镍矿物的发现和成因讨论

本文通过光学鉴定和扫描电镜等分析测试手段,首次在广西上林、河池碳沥青中发现粒度在1—5微米左右的微粒分散状针镍矿、紫硫镍矿、六方氧钒矿、黑铁钒矿。根据碳沥青的产出条件和结构构造特征,认为碳沥青。和钒、镍的物质来源都是来自本层下部中泥盆统的黑色炭质、钙质生油页岩和泥灰岩。并且认为碳沥青中分散的几种钒、镍矿物,是在油气演化晚期阶段从合钒、镍卟啉等金属-有机化合物的原油沥青经热变质作用分解、转化而来的。     

DISCOVERY OF SOME VANADIUM AND NICKEL MINERALS FROM ANTHRAXOLITE AND DISCUSSION OF THEIR ORIGIN

By means of optical identification, Seanning Electron Microscopic analysis, etc., finegranular dispersed millerite, violarite, karelianite and montroseite were discovered for thefirst time from anthraxolites at Shanglin and Hechi in Zhuang Autonomous Region ofGungxi. Based on the occurrence and texture of anthraxolites, we propose that they along withthe vanadium and nickel content must have been derived from the black carbonaceous andcalcareous shale and marl of mid-Devonian system and that these minerals may have beenproduced by thermal metamorphism from crude oil and bitumen containing metallo-organiccompounds, such as vanadium and nickel porphyrins at the late stage of oil-gas evolution.