新疆西北部和什托洛盖盆地早中生代沉积特征及构造演化

和什托洛盖盆地为新疆西北部地区出露较好的一个早中生代盆地。对盆地内不同构造位置沉积剖面的岩相和相组合分析结果表明，盆地内部发育多种沉积相带并具有显著的空间变化。盆地北部或北东部边缘，以发育冲积扇相、扇三角洲相和湖相为主。盆地的南部或南西部，以发育冲积扇相和河流相为主。古水流和物源分析结果指示，盆地沉积物主体来自北部山区，部分来自盆地南部或西南部地区。通过对盆缘断裂两侧地层的分布特征和其自身要素的分析，结合平行和垂直于盆地长轴、边缘断层的地震剖面，本文认为和什托洛盖盆地的形成和发展，主要受控于盆缘两侧断裂，尤其是盆地南缘达尔布特断裂的左行走滑运动。该盆地是独立于准噶尔盆地之外发展演化的。

The Characteristics of Sedimentation and Tectonic Evolution of Heshentuoluogai Basin in Early Mesozoic, Northwest Xinjiang

The Heshentuoluogai basin is a well-preserved Early Mesozoic basin in Northwestern Xinjiang.There exist various depositional sedimentary lithofacies and facies associations that show obvious spatial variations in different areas of the basin.lluvial fan,fan delta and fine grained lacrustine sediments dominate the proximal areas of the northern or eastnorthern basin margins,while alluvial fan conglomerate,fluvial sandstone and conglomerate facies associations are prevalent in the southern or southwestern parts of the basin.Most sediments mainly come from the Xiemisitaishan area,and some sediments may come from south or southwest mountains,as indicated by restored paleo-current directions and provenance.Based on the stratigraphic style distributed on two sides of basin-margin faults and factors of these faults,and combined with parallel and vertical seismic sections of the basin,this study suggests that the formation and development of Heshentuoluogai basin is controlled by two margins' faults,especially by the sinistral strike-slip movement of the Daerbut fault to the south margin of the basin,and this basin has its own evolving history totally different from that of the Junggar basin.