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<sup>&#x0002A;</sup>

doi:10.7605/gdlxb.2016.03.028

古地理学报 ›› 2016, Vol. 18 ›› Issue (3): 399-410. doi: 10.7605/gdlxb.2016.03.028

• 岩相古地理学及沉积学 • 上一篇下一篇

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^*

王泽鹏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, 吴文明¹

1 贵州省地质矿产勘查开发局105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

收稿日期:2016-01-25 修回日期:2016-04-17 出版日期:2016-06-01 发布日期:2016-06-01
通讯作者: 杜远生,男,1958年生,中国地质大学(武汉)教授、博士生导师,主要从事沉积地质学研究。E-mail: duyuansheng126@126.com。 E-mail:wangzepengyu@126.com。
作者简介:王泽鹏,男,1983年生,2013年毕业于中国科学院地球化学研究所,获博士学位,现为贵州省地质矿产勘查开发局105地质大队高级工程师,主要从事地球化学研究。
基金资助:
*中国地质调查局地质调查项目(编号:12120114016501)和贵州省地质矿产勘查开发局项目(编号:黔地矿办发[2013]56号)联合资助

Reconstruction of quantitative lithofacies palaeogeography of the Sinian Doushantuo Age of phosphorite depositional zone in Kaiyang area,central Guizhou Province

Wang Zepeng¹, Zhang Yaguan², Du Yuansheng², Chen Guoyong³, Liu Jianzhong¹, Xu Yuanyuan², Tan Daiwei¹, Li Lei¹, Wang Dafu¹, Wu Wenming¹

1 Geological Party 105,Guizhou Provincial Bureau of Geology and Mineral Exploration and Development,Guiyang 550018,Guizhou;
2 State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences(Wuhan),Wuhan 430074,Hubei;
3 Science and Technology Information Department,Guizhou Provincial Bureau of Geology and Mineral Exploration and Development,Guiyang 550004,Guizhou;

Received:2016-01-25 Revised:2016-04-17 Online:2016-06-01 Published:2016-06-01
Contact: Du Yuansheng,born in 1958,is a professor and Ph.D. supervisor of China University of Geosciences(Wuhan), and is mainly engaged in sedimentary geology. E-mail: duyuansheng126@126.com. E-mail:wangzepengyu@126.com。

摘要/Abstract

摘要： 磷矿的沉积和成矿与成磷期的古地理环境密切相关。本文首次将“单因素分析多因素综合作图法”运用于开阳地区震旦纪陡山沱期沉积型磷矿床的成矿分析和找矿预测上。通过选取陡山沱组及其各岩性段的地层厚度及磷矿层品位作为单因素,确定开阳地区古地理格局;结合地层岩性组合、沉积特征等多因素综合分析,恢复开阳地区成矿期沉积环境,编制陡山沱早期、中期和晚期岩相古地理图。根据定量岩相古地理重建结果,认为开阳地区陡山沱期整体处于南靠黔中古陆、地势南高北低、局部地形复杂的滨岸海滩沉积环境,其中临滨带为最有利成矿带,局部地形变化也会造成矿层厚度、品位的差异;矿层受到的水流冲蚀、暴露、淋滤及再沉积作用是导致矿石品位显著提升的关键因素。通过定量岩相古地理学精确还原成矿期古地理环境、解析多期次沉积成矿过程,对于确定磷矿控矿因素、构建找矿预测模型和预测矿体空间位置具有重要意义。

关键词: 黔中, 震旦纪, 磷矿, 定量岩相古地理学, 找矿预测

Abstract: The deposition and mineralization of phosphorite had intimate relationship with the paleogeographic 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 lithologic section and the ore grade of phosphorite bed as the single factors to reflect the palaeogeographical pattern of Kaiyang area. Based on these isoline maps of single factors and other factors like lithologic combinations and sedimentary characteristics,the sedimentary environments of metallogenic epoch were clearly recovered and at last the quantitative lithofacies palaeogeographical maps of the Early,Middle and Late Doushantuo Age were compiled. According to the result of reconstruction of quantitative lithofacies palaeogeography, we proposed that Kaiyang area was in seashore environment which was located in north margin of Central 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 erosion,exposure,leaching and reworking would had higher ore grade. Using quantitative lithofacies palaeogeography 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.

Key words: central Guizhou Province, Sinian, phosphorite, quantitative lithofacies palaeogeography, exploration prediction

中图分类号:

P534.31

王泽鹏, 张亚冠, 杜远生, 陈国勇, 刘建中, 徐园园, 谭代卫, 李磊, 王大福, 吴文明. 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.

Wang Zepeng, Zhang Yaguan, Du Yuansheng, Chen Guoyong, Liu Jianzhong, Xu Yuanyuan, Tan Daiwei, Li Lei, Wang Dafu, Wu Wenming. Reconstruction of quantitative lithofacies palaeogeography of the Sinian Doushantuo Age of phosphorite depositional zone in Kaiyang area,central Guizhou Province[J]. JOPC, 2016, 18(3): 399-410.

http://www.gdlxb.cn/CN/Y2016/V18/I3/399

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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

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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

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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^*