论哈拉阿拉特组的时代及古环境特征

<正> 哈拉阿拉特组是新疆准噶尔盆地西北缘石炭系的一个地层单位,由于这套地层被认为是克拉玛依油田的生油岩系之一,所以受到较多的注意。这个组首先由郝服光(1964)在总结准噶尔盆地西北缘地层古生物标准剖面时提出的,层型选在哈拉阿拉特山北坡,沿乌尔禾至和什托洛盖公路旁。原来包括两部分岩层,下部以灰黑色变质泥板岩为主,并有白色石英脉侵入,顶部还夹少量灰岩透镜体,产腕足类和海百合茎化石;上部以绿色为主

Stratigraphical age and paleoenvironmental features of the Hala'alad Formation

Based on fossil fusulinids, brachiopods, conodonts recently collected by the authors in the mountains on the northwestern margin of the Junggar Basin of Xingjiang Autonomous Region, the age of the Hala-alad Formation, which was in confusion before, is now identified as Early Late Carboniferous (Bashkirian).Meanwhile, a new stratigraphical unit, the Alerda'ikser Formation of Early Moscowian is described and the paleoenvironmental features of these formations are essentially discussed.