摘要
研究区铝土矿床是产于碳酸盐岩侵蚀面上的一水硬铝石型沉积矿床,中二叠统梁山组为其赋矿层位。为了了解梁山组沉积相在研究区内不同时期、不同区域的发育情况及在纵向上的演化过程,通过针对性地选取典型的钻井剖面资料,做了4条联合剖面进行对比分析。结果表明,在成矿过程中,研究区发生了两次海侵和一次海退,海水由南西向北东方向入侵;古地理格架对铝土矿的物质形成、沉积保存以及次生富集均起着重要的控制作用。
The bauxite deposits in the study area belongs to the monohydrate bauxite deposit which were located the eroded sur- face of carbonate rocks, and the host country rock is the Middle - Permian Liangshan formation strata. In order to understand the devel- opment situation of the sedimentary facies of Liangshan formation in different periods and in different regions in the study area as well as the evolutionary process, the authors selected four strata profiles for the comparative analysis from the drilling records. The result indica- ted that there were two stages of transgression and a stage of marine regression in the study area during the ore - forming period, and the sea water transgressed into the NE part from the SW direction. The paleogeographic frame work played an important role in the deposi- tion of the ore - forming materials, deposit preservation and the secondary enrichment.
出处
《矿产勘查》
2013年第4期435-440,共6页
Mineral Exploration
基金
贵州省科学技术基金项目(编号:S2009JP00401457110)资助
关键词
铝土矿
中二叠统梁山组
沉积相
控矿作用
黔东南
bauxite deposit
Middle- Permian period
Liangshan formation
southeastern Guizhou
