邵红梅;冯子辉;李国蓉;卢曦;孟祥豪;

• 1:中国地质大学(北京)能源学院

• 2:大庆油田有限责任公司勘探开发研究院

• 3:成都理工大学能源学院

摘要(Abstract)：

综合应用岩石薄片显微镜鉴定、电子探针分析、阴极发光显微分析及流体包裹体温度测试等,研究塔东古城地区奥陶系碳酸盐岩的岩石矿物学特征.结果表明:塔里木盆地古城地区中下奥陶统灰岩中发育钠长石自生矿物,钠长石的发育和分布具有独特性,集中发育于鹰山组灰岩地层,以偶见、分散状和沿缝合线富集3种产状分布,主要交代灰岩微晶方解石沉积组分及海底胶结物方解石等早期成岩组分;钠长石的流体温度较高,温度在340~440℃之间,与沉积时或沉积期后不久的浅海岩浆热液喷流作用有关;钠长石被晚期热液鞍状白云石交代,被缝合线及构造裂缝切割改造,为古城地区第一期热液地质作用.该地区钠长石的发现丰富塔里木盆地热液地质作用的矿物学标志,为研究热液地质作用期次和热液演化史提供依据.

关键词(KeyWords)：钠长石;热液地质作用;热液演化史;古城地区;塔里木盆地;奥陶系

Abstract:

Keywords:

基金项目(Foundation):国家自然科学基金项目(41272150)

作者(Author):邵红梅;冯子辉;李国蓉;卢曦;孟祥豪;

Email:

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