古地理学报2016，Vol.18Issue(3)：399-410,12.DOI:10.7605/gdlxb.2016.03.028
黔中开阳磷矿沉积区震旦纪陡山沱期定量岩相古地理重建
Reconstruction of quantitative lithofacies palaeogeography of the Sinian Doushantuo Age of phosphorite depositional zone in Kaiyang area,central Guizhou Province
王泽鹏 1吴文明 1张亚冠 2杜远生 2陈国勇 3刘建中 1徐园园 2谭代卫 1李磊 1王大福1
作者信息
- 1. 贵州省地质矿产勘查开发局 1 05 地质大队，贵州贵阳 550018
- 2. 中国地质大学 武汉 生物地质与环境地质国家重点实验室，湖北武汉 430074
- 3. 贵州省地质矿产勘查开发局科技信息处，贵州贵阳 550004
- 折叠
摘要
Abstract
The deposition and mineralization of phosphorite had intimate relationship with the paleo-geographic environment of phosphogenesis.This paper first used the single factor analysis and multifactor comprehensive mapping method to analyze and predict the phosphorite deposits in Kaiyang area during Sinian Doushantuo Age.This paper selected the stratum thickness of the Doushantuo Formation and its each lithol-ogic section and the ore grade of phosphorite bed as the single factors to reflect the palaeogeographical pat-tern of Kaiyang area.Based on these isoline maps of single factors and other factors like lithologic combina-tions and sedimentary characteristics,the sedimentary environments of metallogenic epoch were clearly re-covered and at last the quantitative lithofacies palaeogeographical maps of the Early,Middle and Late Dous-hantuo Age were compiled.According to the result of reconstruction of quantitative lithofacies palaeogeogra-phy,we proposed that Kaiyang area was in seashore environment which was located in north margin of Cen-tral Guizhou Old Land,and the topography became higher from north to south and local terrain was rugged. The nearshore areas were targeted as the most advantageous metallogenic belt and the changeful local terrain affected the thickenss and ore grade of phosphorite,and the phosphorite which experienced multi-stages ero-sion,exposure,leaching and reworking would had higher ore grade.Using quantitative lithofacies palaeo-geography can accurately recover the palaeogeographical environment of metallogenic epoch and analyze the sedimentation and mineralization processes,and it has important significance for confirming the controlling factors of phosphorite,constructing mineral prediction model and predicting the spatial location of orebody.关键词
黔中/震旦纪/磷矿/定量岩相古地理学/找矿预测Key words
central Guizhou Province/Sinian/phosphorite/quantitative lithofacies palaeogeogra-phy/exploration prediction分类
天文与地球科学引用本文复制引用
王泽鹏,吴文明,张亚冠,杜远生,陈国勇,刘建中,徐园园,谭代卫,李磊,王大福..黔中开阳磷矿沉积区震旦纪陡山沱期定量岩相古地理重建[J].古地理学报,2016,18(3):399-410,12.
