古地理学报2009，Vol.11Issue(5)：491-502,12.
准噶尔盆地南缘古近纪-新近纪前陆盆地沉积格局与演变
Depositional setting and evolution of the Paleogene-Neogene foreland basin of southern margin of Junggar Basin
摘要
Abstract
Good ways are found in studying clastic deposits of the Paleogene and Neogene in southern margin of Junggar Basin.The ways are ① Lithofacies and sedimentary facies are distinguished by outcrop analyses and core and thin section description,② The boundaries of deposits are identified by recognition of shoreline evolution according to different characteristics of seismic facies and different locations of facies change and ③ The main and minor provenances are distinguished by characteristics of heavy mineral assemblages and isopach maps of sandstones.Characteristics of sedimentary facies have been studied by this comprehensive method.The depositional framework and evolution of the southern margin of Junggar Basin were analyzed on this basis.The results indicate that during the deposition of the Paleogene Ziniquanzi Formation, 4 large scale fan delta deposits were developed in thrust belt of the Tianshan Mountains and the lake level was lower.During the deposition of the Anjihaihe Formation, 3 fan delta deposits with decreasing sizes were developed in front of the Tianshan Mountains due to the lake level rising and the fan delta retrogration.Fan delta was not developed in Huoerguosi area.During the deposition of the Early Neogene Shawan Formation, fan deltas with larger scales were developed in front of the Mountains, the topography differences were large, the slope was steep and the climate was arid due to lake level quick falling.There are 2 main sedimentary provenances and 2 minor ones from the Paleogene to Neogene in southern margin of Junggar Basin.The main provenances are the Dongwan-Tugulu-Manas anticline in central area, the Xihu-Dushanzi anticline in western area.The minor sedimentary provenances are respectively the Hutubi anticline in eastern area and the Huoerguosi anticline in central western area.These four provenances are distributed in south-north direction.There is a very important provenance in Kayindike area which is from the foreland uplifting area.关键词
准噶尔盆地南缘/前陆盆地/古近系/新近系/扇三角洲Key words
southern margin of Junggar Basin/ foreland basin/ Paleogene/ Neogene/ fan delta分类
天文与地球科学引用本文复制引用
高志勇,韩国猛,朱如凯,郭宏莉,王道串,李本亮..准噶尔盆地南缘古近纪-新近纪前陆盆地沉积格局与演变[J].古地理学报,2009,11(5):491-502,12.基金项目
国家重大专项课题"中西部前陆盆地构造地质与沉积储集层特征"(编号:2008 ZX05000-003-01)的部分成果 （编号:2008 ZX05000-003-01）
