博兴洼陷新生代砂岩碎屑石榴石的物源示踪及对鲁西隆起的指示  

Detrital Garnets from Cenozoic Sandstones across Boxing Sag for Provenace Indicator and Its Implication for the Luxi Uplift

作　　者：石永红[1] 李忠[2] 卜香萍[1] 许承武[3] 

机构地区：[1]合肥工业大学资环学院,合肥230009 [2]中国科学院地质与地球物理研究所,北京100029 [3]大庆油田勘探开发研究院,黑龙江大庆163712

出　　处：《沉积学报》2009年第5期967-975,共9页Acta Sedimentologica Sinica

基　　金：国家自然科学基金项目(批准号:40672083)资助

摘　　要：鲁西隆起与临近盆地的新生代形成演化关系一直是研究的热点。以博兴凹陷为研究靶区,通过对新生代各层位碎屑石榴石的高分辨率的精确定量分析,并根据石榴石成分的专属性和含量变化,探讨了鲁西隆起与临近盆地新生代的演化历史。研究表明,博兴洼陷新生代的物源主要是来自鲁西隆起和胶东地区,其中胶东地区始终是其主要的物源。而石榴石含量的变化显示,鲁西隆起在新近纪早期大幅度隆升,推测古新世至始新世早期和始新世晚期至渐新世早期可能有两次小规模的抬升。For a long time, the evolution relationships between Luxi uplift and peripheral basins during Cenozoic is a research hotspot. In this study, Boxing Sag has been selected as the target area, and the evolution history between Luxi uplift and peripheral basins has been discussed on the basis of the analysis from the exact high spatial resolution for the detrital garnets from Cenozoic various horizons, and the exclusiveness of garnets compositions and their content variation. The results show that the primary provenance of Boxing Sag were from the Luxi uplift and Jiaodong terrane during Cenozoic, more importantly Jiaodong te^xane. The content variation of detrital garnet implies that Luxi uplift had been rising up quickly during early Neogene, and two small-scale uplifts has been conjectured from Paleocene to early Eocene and from late Eocene to early Oligocene respectively.

关 键 词：新生代 高分辨 碎屑石榴石 博兴洼陷 鲁西隆起 

分 类 号：P578.947[天文地球—矿物学]