泰国哇伦矿区与老挝巴根矿区钾镁盐成矿特征对比及找矿分析  

Comparison of metallogenic characteristics and Prospecting Analysis of potassium-magnesium salts between Wat Non mining area in Thailand and Pak Ngum mining area in Laos

作　　者：张明明[1] Zhang Mingming(Geological Institute of China Chemical Geology and Mine Bureau,Beijing,100101,China)

机构地区：[1]中化地质矿山总局地质研究院,北京100101

出　　处：《化工矿产地质》2023年第4期296-303,共8页Geology of Chemical Minerals

基　　金：中央财政补助、中央地勘单位地质勘查项目泰国沙功那空府哇伦尼瓦矿区钾盐矿勘查(编号:计外资1690号、发改办外资1020号);四川省上益龙蟒矿业(老挝)独资有限公司项目,老挝万象市巴根县钾盐矿勘查。

摘　　要：泰国哇伦矿区与老挝巴根矿区钾镁盐矿同属于沙功那空盆地,巴根矿区属于沙功那空盆地的次级盆地(万象盆地),和哇伦矿区一样均体现出由蒸发岩与陆源碎屑沉积组合的三个沉积旋回,沉积时代相近,成盐地质背景、成盐演化类型相同,含钾盐的盐矿类型、盐矿物组合相似。通过对两个矿区的钾镁盐矿勘查工作,依据钻孔见矿情况、地层对比,结合重力测量资料分析其成矿地质特征及成矿规律,认为:在钾盐沉积时它们是独立的成钾拗陷,不同拗陷地层层位和厚度均差别较大,哇伦矿区钾镁盐矿与巴根矿区同样受构造控制影响,矿层沉积次序具有相似特征。本次矿床特征对比及找矿分析工作,对哇伦矿区下一步钾镁盐勘查工作可以起到重要的指导作用。Wat Non mining area in Thailand and Pak Ngum mining area in Laos both belong to the Sakon Nakhon basin.Pak Ngum mining area belongs to the secondary basin(Vientiane basin)of the Sakon Nakhon basin;They are all three sedimentary cycles of evaporite and terrigenous clastic deposits,with similar sedimentary age,the same salt-forming geological background and salt-forming evolution type,and extremely similar potash-bearing salt deposit types and salt mineral assemblages.Through the exploration of potassium-magnesium salt deposits in the two mining areas,the geological characteristics and metallogenic regularities of the deposits are analyzed by the ore finding situation of boreholes,stratigraphic comparison and gravity survey data.During potassium salt deposition,they are independent potassium-forming sags,and the stratigraphic horizon and thickness of different sags are quite different.It is considered that the potassium-magnesium salt deposit in Wat Non mining area and Pak Ngum mining area are also controlled by the tectonic structure,and the deposit sequence has similar characteristics,which provides important guidance for the next step of potassium-magnesium salt exploration in the Wat Non mining area.

关 键 词：钾镁盐矿 哇伦矿区 巴根矿区 成矿特征 含矿地层 

分 类 号：P619.211[天文地球—矿床学]