黑龙江七台河地区城子河组绿泥石垂向分布异常分析  

Preliminary analysis of the vertical distribution of chlorite in Chengzihe formation of Qitahe district of Heilongjiang Province

作　　者：郑启明[1] 刘钦甫[1] 伍泽广[1] 张印民[1] 张志亮[1] 

机构地区：[1]中国矿业大学地球科学与测绘工程学院,北京100083

出　　处：《湖南科技大学学报（自然科学版）》2011年第4期26-31,共6页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金资助项目(41072119)

摘　　要：运用X射线衍射和X射线荧光分析技术,对黑龙江七台河地区侏罗系上统城子河组的87、90、95和98号煤层顶底板及夹矸中的绿泥石进行了研究.结果表明,研究区粘土矿物以伊蒙间层矿物、伊利石和绿泥石为主,绿泥石含量在2%～17%.随着埋藏深度增加,成岩作用增强,绿泥石含量逐渐降低,且由富Mg绿泥石转变为富Fe绿泥石.研究区绿泥石的形成温度(107～215℃)和成岩作用阶段具有一定的对应关系,其含量的垂向异常分布与下伏岩浆活动有关.岩浆活动导致围岩温度升高,煤层因烘烤作用产生大量的有机酸和CO2,致使成岩流体偏酸性,不利于绿泥石的形成,最终导致其含量随深度逐渐降低.The characteristics of the chlorites in the floors and partings of coal 87, 90, 95 and 98 of Chengzihe formation of up Jurrasic in Qitaihe of Heilongjiang province, were studied with the method of X ray diffraction and X ray fluorescence analysis. The results indicated that the main clay minerals included smectite illite interlayer, ilhe and chlorite, and the chlorite concentrate is between 2% and 17%. The chlorite is changed from Mg - rich type to Fe - rich type with the buried depth and diagenesis. The chlorite formation temperature （ 107- 215℃ ） is corresponding to the diagenesis stages and the vertical abnormal distribution of the chlorite concentration are related to underlying magmation. The results of the magmation were that the temperature of surrounding rocks increased, quantitative of organic acid and CO2 is generated from coal strata, which lead to the generation of partial acidic formation fluid. The acidic formation fluid less favorable for the formation of chlorite, so that the concentration of the chlorite is decreased with the buried depth.

关 键 词：七台河 城子河组 绿泥石 垂向异常 

分 类 号：P575[天文地球—矿物学]