从煤岩成分看延安期古气候变迁  

PALEO-CLIMATE EVOLUTION OF YAN’AN STAGE INFERRED FROM PETROGRAPHIC COMPOSITION OF COAL

作　　者：周春光[1] 杨起[1] 潘治贵[1] 康西栋[1] 王明寿[1] 

机构地区：[1]中国地质大学,山西煤田地质局

出　　处：《中国煤田地质》1996年第4期12-14,19,共4页Coal Geology of China

摘　　要：在详细研究鄂尔多斯盆地神木煤田延安组５￣（－１）、３￣（－３）和１￣（－１）煤层煤岩组成的基础上，应用ＢＤＩ、ＭＢＤＩ、Ｖ／Ｉ、ＧＩ及ＴＲＩ等煤岩参数分析了聚煤期的古气候演化。结果表明，延安期古气候为北温带半潮湿气候且具有从半潮湿－潮湿－半潮湿的演化趋势。作者认为煤岩成分是一个较灵敏的古气候指示剂、煤岩学方法在分析煤系地层形成过程中的主气候变迁时可以弥补其它方法的不足。Based on the detailed study on the petrogrophic composition of coal5￣(-1),3￣(-1)and 1_(-1) in yan'anFormation of Shenmr Coalfield,Ordos Basin,aseries of petrographiv paramerers of coal,such as BDI,MBDI,V/I,GI,cnd TPI ,are opplied to analyse paleocliuatic evolution during coal accumulation,TheNescit shooos that the paleoclintate at Yan'an stage is semihumid Climate in north temperate Zone andit has an evolutionary trend from semihumid to humid and to semihumid in the end, Author thinksthan the petrographic composition of coal is a very semsitive indicator of paleoclimate and method ofcoal petrology cari make up for the defect of the other methods on studying paleoclimate evolutiondurimg the formation of coal measures strata.

关 键 词：煤岩成分 主气候 延安期 神木煤田 

分 类 号：P618.110.4[天文地球—矿床学] P532[天文地球—地质学]