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南盘江盆地中三叠统复理石的物源和沉积构造背景分析
杨超¹,陈清华¹,吕洪波¹,张洪涛²,曲长胜³
(1.中国石油大学地球资源与信息学院，山东东营257061;2.四川石油管理局测井公司，重庆400021;3.中石化胜利油田地质科学研究院，山东东营257000)

摘要:

利用数据统计分析方法，对岩石薄片数据、古水流数据、岩石化学数据等进行了统计分析,在此基础上研究了南盘江盆地中三叠统物源和沉积构造背景。结果表明:中三叠统南盘江盆地古水流方向为北西西方向;沉积物主要来源于盆地一侧的再旋回造山带;再旋回造山带应该在盆地的东南方向；沉积构造背景以大陆岛弧为主,兼有活动陆缘的性质。

关键词: 南盘江盆地古流向中三叠统物源构造背景

DOI：

分类号:

基金项目:国家自然科学基金项目(49972037)

Provenance and Tectonic settings of the middle Triassic flysch in Nanpanjiang Basin

YANG Chao¹,CHEN Qing-hua¹,Lv Hong-bo¹,ZHANG Hong Tao¹,QU Chang-sheng³

(1.College of Geo-Resources and Information in China University of Petroleum, Dongying 257061, China ;2. Well Logging Company, Sichuan Petroleum Administrative Bureau, PetroChina, Chongqing 400021, China ;3. Geological Scientific Research Institute of Skengli Oilfield, SJNOPEC,Dongying 257000,China)

Abstract:

In order to clarify the provenance and tectonic setting of Nanpanjiang Basin in the middle Triassic, thin section data, palaeocurrenl data and the geochemical data were counted and analyzed by using the statistic and analytic method. The results show that the paleocurrent direction in the middle Triassic is NWW in Nanpanjiang Basin, and the sediment comes from the recycled orogen belt which lies in the southeast part of the basin. The tectonic setting is the combination of island arc related to a continent and an active continental margin.

Key words: Nanpanjiang Basin paleocurrent direction middle Triassic provenance tectonic setting