西藏羌塘地体三叠纪—侏罗纪海相砂岩颗粒组分及其构造意义

张玉修

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西藏羌塘地体三叠纪—侏罗纪海相砂岩颗粒组分及其构造意义

张玉修

文章导航 > 沉积学报 > 2006 > 24(2): 165-174

张玉修. 西藏羌塘地体三叠纪—侏罗纪海相砂岩颗粒组分及其构造意义[J]. 沉积学报, 2006, 24(2): 165-174.

引用本文:

张玉修. 西藏羌塘地体三叠纪—侏罗纪海相砂岩颗粒组分及其构造意义[J]. 沉积学报, 2006, 24(2): 165-174.

ZHANG Yuxiu. Mesozoic Sandstone Composition in the Qiangtang Block, Tibet: Implications for Tectonic Setting[J]. Acta Sedimentologica Sinica, 2006, 24(2): 165-174.

Citation:

ZHANG Yuxiu. Mesozoic Sandstone Composition in the Qiangtang Block, Tibet: Implications for Tectonic Setting[J]. Acta Sedimentologica Sinica, 2006, 24(2): 165-174.

张玉修. 西藏羌塘地体三叠纪—侏罗纪海相砂岩颗粒组分及其构造意义[J]. 沉积学报, 2006, 24(2): 165-174.

引用本文:

张玉修. 西藏羌塘地体三叠纪—侏罗纪海相砂岩颗粒组分及其构造意义[J]. 沉积学报, 2006, 24(2): 165-174.

ZHANG Yuxiu. Mesozoic Sandstone Composition in the Qiangtang Block, Tibet: Implications for Tectonic Setting[J]. Acta Sedimentologica Sinica, 2006, 24(2): 165-174.

Citation:

ZHANG Yuxiu. Mesozoic Sandstone Composition in the Qiangtang Block, Tibet: Implications for Tectonic Setting[J]. Acta Sedimentologica Sinica, 2006, 24(2): 165-174.

西藏羌塘地体三叠纪—侏罗纪海相砂岩颗粒组分及其构造意义

张玉修

中国科学院边缘海地质重点实验室广州 510640

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通讯作者:
张玉修

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文章访问数: 1894
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Mesozoic Sandstone Composition in the Qiangtang Block, Tibet: Implications for Tectonic Setting

ZHANG Yuxiu

Key Laboratory of Marginal Sea Geology, Chinese Academy of Sciences, Guangzhou 510640

More Information

Corresponding author: ZHANG Yuxiu

摘要

摘要: 来自羌塘地体(33°-35°N, 85°-93°E)的154件中生界砂岩样品颗粒组分实验结果表明，羌塘地体中部中下三叠统砂岩(Q61±8F27±13L12±10, Qm59±8F28±13Lt13±9, Qp28±22Lvm72±22Lsm0±0)的物源区为复杂的再旋回造山带和陆块内部，大部分上三叠统砂岩(Q78±14F6±5L16±12, Qm77±15F6±5Lt17±12, Qp14±23Lvm34±37Lsm52±33)、下侏罗统砂岩(Q83±20F2±2L15±22, Qm79±23F2±2Lt19±24, Qp35±19Lvm0±0 Lsm65±19)、中侏罗统砂岩(Q69±22F6±6L24±25, Qm67±22F6±6Lt26±24, Qp14±22Lvm32±38Lsm54±38)和上侏罗统砂岩(Q80±17F6±4L14±17, Qm78±17F6±4Lt16±16, Qp17±23Lvm27±35Lsm56±34)的物源区以再旋回造山带为主，然而，南羌塘地体南缘的上三叠统以及北羌塘地体南缘的下侏罗统同时发育物源来自陆块内部的砂岩。整个中羌塘复背斜带砂岩颗粒中常含有不稳定重矿物及其它易风化铁镁矿物表明该地区有丰富的蛇绿岩残片，这预示着双湖缝合带沿整个中羌塘复背斜带展布，羌塘中部含蓝片岩变质杂岩体可能形成于中羌塘不规则大陆边缘的海湾处，而不是来自金沙江缝合带。中生代砂岩的颗粒组分及岩石学证据表明，中羌塘复背斜至少从早三叠世就因为造山隆升并遭剥蚀提供物源。上三叠统砂岩物源区为再旋回造山带，这表明这种挤压背景下不存在沿班公湖—怒江缝合带弧后扩张的伸展机制。
- 砂岩 /
- 中生代 /
- 羌塘 /
- 青藏高原 /
- 特提斯
Abstract: Onehundredandfiftyfour Mesozoic sandstone samples from the Qiangtang block (ca. 3３°~35°N, 85°~93°E) were conducted for analysis of detrital modes, in an attempt to evaluate their provenance and the type of tectonic setting in which they were deposited. The LowerMiddle Triassic sandstones (Q61±8F27±13L12±10, Qm59±8F28±13Lt13±9, Qp28±22Lvm72±22Lsm0±0) in central Qiangtang are characterized by complex derivations from both recycled orogen and continental block provenances. The most of the Upper Triassic (Q78±12F7±7L15±11, Qm77±12F7±7Lt16±11, Qp16±11Lvm30±35Lsm54±33), Lower Jurassic (Q83±20F2±2L15±22, Qm79±23F2±2Lt19±24, Qp35±19Lvm0±0 Lsm65±19), Middle Jurassic (Q69±22F6±6L24±25, Qm67±22F6±6Lt26±24, Qp14±22Lvm32±38Lsm54±38), and Upper Jurassic (Q80±17F6±4L14±17, Qm78±17F6±4Lt16±16, Qp17±23Lvm27±35Lsm56±34) sandstones are dominated by recycled orogen origin. However, the sandstones that were derived from continental block source also exist in the southern margin of southern Qiangtang and in the Lower Jurassic strata in the southern margin of northern Qiangtang. It could have contained abundant ophiolitic fragments and other readilydecomposed ferromagnesian minerals across the entire anticlinorium. These mafic minerals point to the presence of the Shuanghu suture along the entire central Qiangtang anticlinorium and the blueschistbearing metamorphic complexes in central Qiangtang could be accommodated in a largescale enclave in an irregular central Qiangtang continental margin. The distribution of Mesozoic recycled orogenderived sandstones on Qiangtang indicates a contraction background, supporting〖KG*2〗a tensile mechanism for backarc spreading along the BangongNujiang belt. 
- sandstone /
- Mesozoic /
- Qiangtang /
- Tibetan plateau /
- Tethys

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[1]	李军, 黄成敏, 文星跃, 张茂超. 四川盆地中生代古气候变化：来自深时古土壤证据 . 沉积学报, 2021, 39(5): 1157-1170. doi: 10.14027/j.issn.1000-0550.2020.058
[2]	. 青藏高原纳木错湖近150年来气候变化的湖泊沉积记录 . 沉积学报, 2014, 32(4): 669-676.
[3]	. 青藏高原北部新生代构造演化在柴达木盆地中的沉积记录 . 沉积学报, 2013, 31(05): 824-833.
[4]	王利强. 青藏高原纳木错湖阶沉积的发生特征及环境指示意义 . 沉积学报, 2009, 27(3): 503-510.
[5]	李明慧. 青藏高原秋里南木湖原生硼砂、芒硝韵律层的发现及气候环境意义 . 沉积学报, 2007, 25(4): 619-625.
[6]	赵俊峰. 鄂尔多斯盆地侏罗系直罗组砂岩发育特征 . 沉积学报, 2007, 25(4): 535-544.
[7]	朱迎堂方小敏高军平伊海生王世锋张伟林. 青藏高原南部乌郁盆地渐新世—上新世地层沉积相分析 . 沉积学报, 2006, 24(06): 775-782.
[8]	刘志飞, 王成善, 金玮, 伊海生, 郑洪波, 赵西西, 李亚林. 青藏高原沱沱河盆地渐新—中新世沉积环境分析 . 沉积学报, 2005, 23(2): 210-217.
[9]	周江羽, 王江海, 尹安, Spurlin M S, Horton B K. 青藏东北缘早第三纪盆地充填的沉积型式及构造背景——以囊谦和下拉秀盆地为例 . 沉积学报, 2002, 20(1): 85-91.
[10]	宋春晖, 孙淑荣, 方小敏, 孙东. 酒西盆地晚新生代沉积物重矿物分析与高原北部隆升 . 沉积学报, 2002, 20(4): 552-559.
[11]	李祥辉, 王成善, 吴瑞忠. 西藏中部拉萨地块古生代、中生代的超层序研究 . 沉积学报, 2002, 20(2): 179-187.
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西藏羌塘地体三叠纪—侏罗纪海相砂岩颗粒组分及其构造意义

张玉修

中国科学院边缘海地质重点实验室广州 510640

通讯作者: 张玉修

收稿日期: 1900-01-01
修回日期: 1900-01-01
刊出日期: 2006-04-10

关键词:

砂岩 /

中生代 /

羌塘 /

青藏高原 /

特提斯

摘要: 来自羌塘地体(33°-35°N, 85°-93°E)的154件中生界砂岩样品颗粒组分实验结果表明，羌塘地体中部中下三叠统砂岩(Q61±8F27±13L12±10, Qm59±8F28±13Lt13±9, Qp28±22Lvm72±22Lsm0±0)的物源区为复杂的再旋回造山带和陆块内部，大部分上三叠统砂岩(Q78±14F6±5L16±12, Qm77±15F6±5Lt17±12, Qp14±23Lvm34±37Lsm52±33)、下侏罗统砂岩(Q83±20F2±2L15±22, Qm79±23F2±2Lt19±24, Qp35±19Lvm0±0 Lsm65±19)、中侏罗统砂岩(Q69±22F6±6L24±25, Qm67±22F6±6Lt26±24, Qp14±22Lvm32±38Lsm54±38)和上侏罗统砂岩(Q80±17F6±4L14±17, Qm78±17F6±4Lt16±16, Qp17±23Lvm27±35Lsm56±34)的物源区以再旋回造山带为主，然而，南羌塘地体南缘的上三叠统以及北羌塘地体南缘的下侏罗统同时发育物源来自陆块内部的砂岩。整个中羌塘复背斜带砂岩颗粒中常含有不稳定重矿物及其它易风化铁镁矿物表明该地区有丰富的蛇绿岩残片，这预示着双湖缝合带沿整个中羌塘复背斜带展布，羌塘中部含蓝片岩变质杂岩体可能形成于中羌塘不规则大陆边缘的海湾处，而不是来自金沙江缝合带。中生代砂岩的颗粒组分及岩石学证据表明，中羌塘复背斜至少从早三叠世就因为造山隆升并遭剥蚀提供物源。上三叠统砂岩物源区为再旋回造山带，这表明这种挤压背景下不存在沿班公湖—怒江缝合带弧后扩张的伸展机制。

English Abstract

Mesozoic Sandstone Composition in the Qiangtang Block, Tibet: Implications for Tectonic Setting

ZHANG Yuxiu

Key Laboratory of Marginal Sea Geology, Chinese Academy of Sciences, Guangzhou 510640

Corresponding author: ZHANG Yuxiu

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2006-04-10

Keywords:

Abstract: Onehundredandfiftyfour Mesozoic sandstone samples from the Qiangtang block (ca. 3３°~35°N, 85°~93°E) were conducted for analysis of detrital modes, in an attempt to evaluate their provenance and the type of tectonic setting in which they were deposited. The LowerMiddle Triassic sandstones (Q61±8F27±13L12±10, Qm59±8F28±13Lt13±9, Qp28±22Lvm72±22Lsm0±0) in central Qiangtang are characterized by complex derivations from both recycled orogen and continental block provenances. The most of the Upper Triassic (Q78±12F7±7L15±11, Qm77±12F7±7Lt16±11, Qp16±11Lvm30±35Lsm54±33), Lower Jurassic (Q83±20F2±2L15±22, Qm79±23F2±2Lt19±24, Qp35±19Lvm0±0 Lsm65±19), Middle Jurassic (Q69±22F6±6L24±25, Qm67±22F6±6Lt26±24, Qp14±22Lvm32±38Lsm54±38), and Upper Jurassic (Q80±17F6±4L14±17, Qm78±17F6±4Lt16±16, Qp17±23Lvm27±35Lsm56±34) sandstones are dominated by recycled orogen origin. However, the sandstones that were derived from continental block source also exist in the southern margin of southern Qiangtang and in the Lower Jurassic strata in the southern margin of northern Qiangtang. It could have contained abundant ophiolitic fragments and other readilydecomposed ferromagnesian minerals across the entire anticlinorium. These mafic minerals point to the presence of the Shuanghu suture along the entire central Qiangtang anticlinorium and the blueschistbearing metamorphic complexes in central Qiangtang could be accommodated in a largescale enclave in an irregular central Qiangtang continental margin. The distribution of Mesozoic recycled orogenderived sandstones on Qiangtang indicates a contraction background, supporting〖KG*2〗a tensile mechanism for backarc spreading along the BangongNujiang belt. 

张玉修. 西藏羌塘地体三叠纪—侏罗纪海相砂岩颗粒组分及其构造意义[J]. 沉积学报, 2006, 24(2): 165-174.

引用本文:

张玉修. 西藏羌塘地体三叠纪—侏罗纪海相砂岩颗粒组分及其构造意义[J]. 沉积学报, 2006, 24(2): 165-174.

ZHANG Yuxiu. Mesozoic Sandstone Composition in the Qiangtang Block, Tibet: Implications for Tectonic Setting[J]. Acta Sedimentologica Sinica, 2006, 24(2): 165-174.

Citation:

ZHANG Yuxiu. Mesozoic Sandstone Composition in the Qiangtang Block, Tibet: Implications for Tectonic Setting[J]. Acta Sedimentologica Sinica, 2006, 24(2): 165-174.

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2023年地质事件沉积研究新进展国际学术研讨会（第一号通知）

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西藏羌塘地体三叠纪—侏罗纪海相砂岩颗粒组分及其构造意义

通讯作者:
张玉修

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Mesozoic Sandstone Composition in the Qiangtang Block, Tibet: Implications for Tectonic Setting

Corresponding author: ZHANG Yuxiu

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西藏羌塘地体三叠纪—侏罗纪海相砂岩颗粒组分及其构造意义

中国科学院边缘海地质重点实验室广州 510640

通讯作者: 张玉修

English Abstract

Mesozoic Sandstone Composition in the Qiangtang Block, Tibet: Implications for Tectonic Setting

Key Laboratory of Marginal Sea Geology, Chinese Academy of Sciences, Guangzhou 510640

Corresponding author: ZHANG Yuxiu

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西藏羌塘地体三叠纪—侏罗纪海相砂岩颗粒组分及其构造意义

通讯作者: 张玉修

计量

出版历程

Mesozoic Sandstone Composition in the Qiangtang Block, Tibet: Implications for Tectonic Setting

Corresponding author: ZHANG Yuxiu

计量

出版历程

目录

西藏羌塘地体三叠纪—侏罗纪海相砂岩颗粒组分及其构造意义

中国科学院边缘海地质重点实验室 广州 510640

通讯作者: 张玉修

English Abstract

Mesozoic Sandstone Composition in the Qiangtang Block, Tibet: Implications for Tectonic Setting

Key Laboratory of Marginal Sea Geology, Chinese Academy of Sciences, Guangzhou 510640

Corresponding author: ZHANG Yuxiu

全文HTML

目录

友情链接

期刊在线

联系我们

通讯作者:
张玉修

中国科学院边缘海地质重点实验室广州 510640