新疆萨勒布尔山中晚志留世地层划分

STRATIGRAPHIC DIVISION OF MIDDLE-LATE SILURIAN IN SALBAR MOUTAINS,XINJIANG

根据已发表的大量古生物资料和实测地层剖面垂向岩性变化，依据国际地层指南修订版（1994）划分原则，将萨勒布尔山中上志留统详细划分为沙尔布尔组（S2s），克克雄库都克组和乌吐布拉克组。根据床板珊瑚、日射珊瑚组合特征，划分出三个组合带，自下而上为Dictyosolenia-Subalveolites－Halysites（S2）相当温洛克阶，Cladopora-Visbylites相当罗德洛阶，Diploepora-Aulocystis相当普日多利阶组合带。其生物和岩石地层特征与塔尔巴哈台山及巴尔喀什湖北部地区完全可以对比。还描述床板珊瑚、日射珊瑚5属9种（其中新种8个）。

Based on published paleontological data and measured lithological section, coupled with international subdivion'prlnciple, the Middle - Upper Silurian is subdivided into Sarbur Formation (S2s), Kekexlongkuduke Formation (S3k) and Wutubulake Formation (Siw). According to association of tabulata and heliolites, three association zones are subdivided, tab is, from bottom up, Diet3)Osolenia -SubalveolitesIlal.vsites (S2) corresponding with Wenlockian stage,Cladopora--Visbylites (S31) corresponding with Ludlovian stage, and Diploepora-Aulocystis (S32) corresponding with Pridolian stage. The biological and tratigraphic characteristics can be correlated with those of Taerbahatai mountains and northern Lake fuerkash. Alld 5 genera and 9 species (8 new species) are descriped of tabulata and heliolites. The above data supply a reliable basis for the regional stratigraphic subdivision and correlation.