摘要
通过对准噶尔盆地南缘中段紫泥泉子组紫三段(E1-2z3)的166件重矿物样品分析,综合古近纪紫泥泉子期的区域构造、气候、沉积物特征等因素,提出古近纪紫三段沉积期的古地理环境为:干燥气候条件下,发育同方向、多河道、间歇性辫状河,水浅、源多、坡缓的古地理环境。多条河流平行发育和迁移,河道垂直岸线伸展、各种沉积相带却平行岸线展布,相带宽度较大。
Based on an analysis of 166 heavy mineral samples from the 3rd Member of Ziniquanzi Formation (E1-2^z^3) in the central southern margin of the junggar Basin and taking into account such factors as regional structure, climate and sediment characteristics, the authors have reached the following conclusions: the palaeogeographic conditions for the deposition of the 3rd Member of Ziniquanzi Formation were dry, with the development of multi-channel and intermittent braided rivers in the same direction characterized by shallowness, multiple sources and gentle slopes. A number of parallel rivers were developed, moved and extended vertical to the shoreline. Nevertheless, various kinds of sedimentary facies with a fairly great width were spread parallel to the shoreline.
出处
《中国地质》
CAS
CSCD
北大核心
2009年第2期456-464,共9页
Geology in China
基金
四川省重点学科建设基金项目(SZD0114)资助。
关键词
重矿物
古地理
准噶尔盆地
古近纪
heavy mineral
palaeogeography
Junggar Basin
Paleogene