摘要
近年有关陕西洛南中元古界管道口群石英质玉(紫绿玛瑙)的报道屡见不鲜。该类石英质玉主要产于中元古界官道口群巡检司组到杜关组的沉积不整合面附近,岩性主要为含砾(彩色燧石)泥质板岩。经过详细的野外地质调查和取样分析并结合区域地质构造演化,从成矿物质来源、沉积环境、热动力成矿及石英质玉致色等几个方面全面分析并探讨了该区石英质玉的地质特征。
In recent years,reports of quartz jade(purple-green agate)in the Guandaokou Group of Mesoproterozoic in Luonan county of Shaanxi Province are not uncommon.This kind of quartz jade mainly occurs in the vicinity of the unconformity surface between the Xunjiansi Formation and the Duguan Formation of the Guandaokou Group of the Mesoproterozoic.The lithology is mainly gravel-bearing(color flint)argillaceous slate.Based on detailed field geological survey,sampling analysis and regional geological structures,the characteristic of the quartz jade and the genesis of the deposit from the aspects of the sources of mineralization,sedimentary environment,thermodynamic mineralization and color causing factors are discussed in this paper.
作者
杨建鹏
高虔
Yang Jian-peng;Gao Qian(Shaanxi Geological Team No.6 Co.,Ltd.Xi′an 710611)
出处
《陕西地质》
2021年第2期60-67,共8页
Geology of Shaanxi
基金
陕西地矿集团有限公司科研专项资金项目(KY201605)。
关键词
赋矿地层
空间分布
地质特征
陕西洛南
ore-bearing strata
spatial distribution
characteristics of geology
luonan of shaanxi