| 青海沱沱河地区晚三叠世苟鲁山克措组沉积相及物源分析 |
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| 引用本文： | 王建新,;康孔跃,;侯明才. 青海沱沱河地区晚三叠世苟鲁山克措组沉积相及物源分析[J]. 西北地质, 2014, 0(4): 123-130 |
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| 作者姓名： | 王建新, 康孔跃, 侯明才 |
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| 作者单位： | [1]四川省核工业地质局二八二大队,四川德阳618000; [2]成都理工大学沉积地质研究院,四川成都610059 |
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| 基金项目： | 中国地质调查局“青海沱沱河地区1：5万倒流沟、寨冒拉昆、赛日布米幅区域地质调查”（基[2011]03-01-71） |
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| 摘 要： | 通过野外实测地层剖面、沉积相标志识别、薄片鉴定和粒度分析等手段,研究了沱沱河地区三叠纪苟鲁山克措组的沉积相类型和沉积特征。结果表明苟鲁山克措组为一套三角洲浅海陆棚体系。物源分析采用碎屑岩类法,研究表明工作区三叠纪砂岩多为长石岩屑砂岩和岩屑石英砂岩,结构成熟度和成分成熟度均较低,显示了沉积物快速堆积,近物源的特征。通过对碎屑矿物的成分分析,揭示其物源源于再旋回造山带。
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| 关 键 词： | 沉积相 物源分析 苟鲁山克措组 沱沱河 晚三叠世 |
Sedimentary Facies and Provenance Analysis of Upper Triassic Goulushankecuo Formation in Tuotuohe Area of Qinghai Province |
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| Affiliation: | WANG Jian-xin , KANG kong-yue , HOU Ming-cai (1. No. 282 Geological Party, Sichuan Bureau of Geology for Nuclear Industry, De＇ yang 618000, China; 2. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China) |
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| Abstract: | Through field profile measuring, sedimentary facies signs identification, thin section authentification and grading analysis, we studied the categories and features of sedimentary facies of Upper Triassic Goulushankecuo Formation. The results show that the Goulushankecuo Formation is a Delta-Neritic shelf facies system. Based on clasolite petrographic study, the statistics from provenance analysis show that the sedarenite of Triassic Goulushankecuo Formation in workspace are mainly feldspathic litharenite and lithic quartz sandstone. Lower textural and com- positional maturity indicates a rapid accumulation of sediments, which is a characteristic of nearby provenance. By detrital composition analysis, it is revealed that the provenance of Upper Triassic Goulushankecuo Formation came from recycled orogen. |
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| Keywords: | sedimentary facies provenance analysis Goulushankecuo Formation Tuotuohe Late Triassic |
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