摘要
本文根据地层厚度资料，对准噶尔内陆盆地晚二叠世－早第三世的沉积物通量进行了计算。计算结果表明，晚二叠世的沉积物通量（１８．２９７×１０６ｍ３／ａ）比中生代－早第三纪（１．７３５×１０６－３．１４２×１０６ｍ３／ａ）高出近一个数量级，因而推测晚二叠世是内陆盆地的主要成盆期。对盆地不同部位的沉积物通量进行比较发现，盆地南部沉积物通量最高，西北部次之．东北部最低。因此，古天山山系的升隆作用较之其他山系更为强烈，可能与其频繁的升降历史和塔里木陆块的推挤作用有关。
Based on the thickness of the strata,the Late Permian-Eogene sediment flux of theJunggar inland Basin is calculated in this paper. The results have revealed that the LatePermian is the main basin--forming stage in the light of the Late Permian sediment flux(18. 297 × 106 m3/a) higher by nearly one magnitude than that of Mesozoic and Eogene(1. 735 ×106 to 3.142 × 106 m3/a). The comparison of the sediment flux in different parts ofthe basin suggests that the sediment flux is highest in the southern part, higher in thenorthwestern part,and lowest.in the northeastern part in the basin. It is deduced that theuplifting of the Palaeo-Tianshan mountain system is much stronger than that of othermountain systems,which may be related to the history of the frequent rises and falls of itsbasement,and to the pushing and extruding of the Tarim continental block.
基金
地矿部基础攻关项目
