兰坪-思茅盆地与泰国呵叻盆地含钾卤水同源性研究──兼论该区找钾有利层位和地区  

GEOLOGY AND MINERALIZING RULES OF POLYMETALLIC PYRITE DEPOSITS IN EARLY PROTEROZOIC RIFT IN EAST LIAONING

作　　者：曲懿华[1] 

机构地区：[1]地质矿产部

出　　处：《化工矿产地质》1997年第2期81-84,共4页Geology of Chemical Minerals

摘　　要：我国兰坪思茅盆地与泰国呵叻盆地同处在一个大地构造带，成矿时代和层位相同，析盐矿物组合类似，母液卤水组成具同源性，兰坪思茅盆地卤水是自呵叻盆地向北迁移所致；析盐组合变化符合卤水从北向南逐渐浓缩的趋势。呵叻盆地下、中、上盐组所显示的三次成盐旋回中，中盐组在兰坪思茅坳陷带均有沉积，下盐组在思茅盆地也有沉积，推断该组沉积期卤水浓缩程度低于呵叻盆地，矿石类型将优于呵叻盆地。我国境内找矿有利层位应为下泥砾盐层（相当呵叻下盐组）。There lie a series of polymetallic pyrite deposits in the Early Protrozoic strata whose origination and distribution were associated mainly with the evolution of the rift basin as well as the ore-hosting formations. A line of pyrite deposits including cobalt , copper and anhydrite bearing and the other line involving boron (dravite) and pyrrhotite , lead and zinc and barite and sphlerite carrying were formed respectively depending on the stages of the rift development. According to mineralizing characters, the genetic types of the deposits may be classified into seafloor volcanic exhalation/deposition and seafloor exhalation/deposition. Mineralizing processes could give full play only through correlation and coordination of different ore controlling factors such as the rift basin, its second basins, the given stratigraphic levels and ore hosting rocks. Sex prospective metallogenic provinces have be determined for polymetallic pyrite deposits in the study area after detailed researches on the mineralizing rules.

关 键 词：卤水 含钾 同源性 盆地 钾盐矿床 找矿 

分 类 号：P619.211[天文地球—矿床学] P641.464[天文地球—地质学]