| 中新生代盆地蒸发岩沉积旋回对比及库车盆地成钾探讨 |
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| 引用本文：曹养同,刘成林,焦鹏程,陈永志.2010.Sedimentary cycles of correlation of evaporites in Paleogene-Neogene basin and formation mechanism of potash deposits in Kuqa basin[J].Mineral Deposits,29(4):657~668 |
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| 基金项目:本文得到中国地质科学院矿产资源研究所中央级公益性科研院所基本科研业务项目（K0807）和国家“十一五”科技支撑课题“塔里木盆地钾盐大规模成矿条件研究与找矿靶区预测技术”（2006BAB07B06）的联合资助 |
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| 中文摘要:新疆库车盆地古近纪—新近纪发育巨厚的蒸发岩沉积，古近纪蒸发岩沉积主要发生在盆地西部的拜城凹陷，新近纪吉迪克时期，蒸发岩沉积迁移至盆地东部的康村凹陷。根据剖面及钻井资料，利用蒸发岩沉积旋回，对欧洲莱茵地堑盆地、库车盆地、云南兰坪_思茅盆地、江汉盆地、大汶口等盆地蒸发岩沉积特征进行分析和对比。结合蒸发岩沉积背景及库车盆地钻井资料，对库车盆地成钾影响因素、成钾可能性、成钾层位进行了探讨。研究认为，库车盆地的次级构造单元拜城凹陷、康村凹陷具有成钾的能力，钾盐层应位于Ⅰ2、Ⅰ4蒸发岩沉积旋回的上部。对比研究显示，库车盆地具有成钾的远景和潜力。 |
| 中文关键词:地质学 蒸发岩 沉积旋回 对比 库车盆地 |
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| Sedimentary cycles of correlation of evaporites in Paleogene-Neogene basin and formation mechanism of potash deposits in Kuqa basin |
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| Abstract:Evaporite deposits with gigantic thickness were developed in Kuqa basin during the Paleogene-Neogene period. Evaporite deposition took place in Baicheng despression within western Kuqa basin in Paleogene period, and the deposited materials moved to Kangcun depression in eastern Kuqa basin in Neogene Jidike period. Based on data available and borehole sections, this paper selected evaporate sedimentary cycles of Rhine graben in Europe, Kuqa basin, Lanping-Simao basin, Jianghan basin and Dawenkou basin to make analysis and comparison. In combination with the sedimentary background and some chemical analysis data of debris in drill holes, the authors analyzed the factors affecting potash formation, the potash-forming probability, and the horizon of potash deposits. Baicheng and Kongcun depressions which are secondary structural units of Kuqa basin are considered to be favorable for the formation of potash deposits, and the potash deposits should lie in the upper part of the second or the fourth evaporite sedimentary cycle. Therefore, it is prospecting to conduct the potosh investiqation in kaqa basin. |
| keywords:geology, evaporite, sedimentary cycle, correlation, Kuqa basin |
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