北淮阳地区不同变形-变质煤的元素分布及其影响因素  

Elements distribution and effecting factors of high rank coals of different deformational-metamorphic types in Beihuaiyang area

作　　者：李小明[1] 曹代勇[1] 占文峰[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,北京100083

出　　处：《煤田地质与勘探》2006年第6期1-3,共3页Coal Geology & Exploration

基　　金：国家自然科学基金项目(40372075)资助

摘　　要：通过对大别造山带前陆北淮阳地区石炭纪高煤级煤的X射线荧光光谱分析,探讨了不同变形-变质类型煤中常量元素的分布规律及其影响因素。结果表明:构造-热作用具有使Al3+、K+、Si4+、Ti4+在煤体中富集,P5+、Fe2++Fe3+、Mn2+Na+、Ca2+、Mg2+向煤体外迁移的趋势;在弱应力带富集Al3+、K+、Ti4+、Na+、Ca2+;在强应力带富集Si4+、P5+、Fe2++Fe3+、Mg2+。岩浆热变质类型煤和构造-热变质类型煤的w(SiO2)/w(Al2O3)和w(K2O)/w(Na2O)值显著增大,与岩浆岩中SiO2及K2O质量分数偏高有重要的成因联系。Based on the X-Ray Fluorescence Spectrometry （XRF） analysis on Carbonifemus coal occured in Beihuaiyang area, the northern foreland basin of Dabie Orogenic Belt, the major elements distribution characters and the effeeting factors of high rank coals of diflbrent deformational-melamorphic types are discussed. The results show that the tectonlc-thennul process made Al^3＋ , K^＋ , Si^4＋ , Ti^4＋ concentrated in coal, but P^5＋＋ , Fe^2 ＋ Fe^3＋ , Mn^2＋ , Na^＋ , Ca^2＋ , Mg^2＋ migrated outside. Otherwise, Al3^＋ , K^＋ , Ti^4＋ , Na^＋ and Ca^2＋ were abundant in weak stress zones, but Si^4＋ p^5＋ , Fe^2＋ Fe^3＋ and Mg^2＋ abundant in strong stress zones. The values of SiO2/Al2O3 and K2O/Na2O in tectonic-thermal metamorphic coal and telemagmatic metamorphic coal were larger than those in regional metamorphic coal, which might be. related to the higher content of SiO2 and K2O in Yanshanian magmarie rocks in Beibuaiyang area.

关 键 词：煤 变形-变质作用 X射线荧光光谱 地球化学特征 北淮阳地区 

分 类 号：P618.11[天文地球—矿床学]