塔里木盆地阿瓦提-满加尔坳陷三叠—侏罗纪沉积物源变迁

基金项目:

国家“九五”科技攻关项目 96-111-02

PROVENANCE EVOLUTION AND MIGRATION OF TRIASSIC AND JURASSIC AWAT-MANJIA'ER DEPRESSION, TARIM BASIN

摘要: 对塔里木盆地阿瓦提-满加尔坳陷三叠—侏罗纪的沉积物源从时空变化上进行了探讨.利用砂岩和砾岩的成分分析, 从纵向上研究沉积物源的演化, 认为包括沙雅前陆隆起在内的毗邻造山带的隆升是随着古生界的揭露而逐步隆起的; 利用岩相展布, 从平面上分析了沉积物源的变迁, 认为包括沙雅前陆隆起在内的周边物源区是与沉降中心同步发生反时针旋转的, 这种旋转与塔里木盆地的顺时针旋转有关
- 沉积物源 /
- 三叠—侏罗纪 /
- 阿瓦提-满加尔坳陷 /
- 塔里木盆地
Abstract: This paper is focused on the provenance evolution and migration of Triassic and Jurassic Awat-Manjia'er depression of the Tarim basin. The compositional analysis of sandstone and conglomerate suggests that the adjacent orogenic zone including the Shaya forebulge was gradually uplifted with the exhumation of the Paleozoic. The analysis based on lithofacies distribution suggests that the surrounding provenances including the Shaya forebulge rotated anti-clockwise contemporaneously with the subsidence center. This rotation may be caused by the clockwise rotation of the Tarim basin.
- provenance /
- Triassic-Jurassic /
- AwatManjia'er depression /
- Tarim basin

图 1 塔里木盆地阿瓦提-满加尔坳陷砂岩成分w(Q)-w(F)-w(L)图解

a.早三叠世; b.中三叠世; c.晚三叠世; d.早侏罗世.图中虚线为Dickinson等^[2]w(Q)-w(F)-w(L) 图解中反映板块构造背景的物源分区

Fig. 1. The triangular w(Q)-w(F)-w(L) plot of sandstone compositions from Awat-Manjia'er depression of the Tarim basin

下载: 全尺寸图片幻灯片

图 2 物源区地层层序与沉积区地层层序之间的关系^[6]

a.反向地层层序; b.混合地层层序

Fig. 2. Relations of stratigraphic sequences between the provenance and the sedimentary province

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图 3 塔里木盆地阿瓦提-满加尔坳陷三叠—侏罗纪岩相分布

a.早三叠世; b.中三叠世; c.晚三叠世; d.早侏罗世.1.砾岩50%~70%;2.砾岩 < 50%, 砂岩 < 50%, 泥岩 < 50%;3.砂岩 > 70%;4.砂岩50%~70%;5.泥岩50%~70%;6.泥岩 > 70%;7.钻井位置

Fig. 3. Triassic and Jurassic lithofacies distribution from Awat-Manjia'er depression of the Tarim basin

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表 1 塔里木盆地阿瓦提-满加尔坳陷三叠—侏罗纪砾石成分统计

Table 1. The statistics of Triassic and Jurassic conglomerate composition from Awat-Manjia'er depression of Tarim basin

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