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西藏日喀则地区早白垩世恰布林组辫状河—扇三角洲沉积

刘志飞,  王成善

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文章导航 > 沉积学报  > 1998 >  16(3): 6-13
刘志飞, 王成善. 西藏日喀则地区早白垩世恰布林组辫状河—扇三角洲沉积[J]. 沉积学报, 1998, 16(3): 6-13.
引用本文: 刘志飞, 王成善. 西藏日喀则地区早白垩世恰布林组辫状河—扇三角洲沉积[J]. 沉积学报, 1998, 16(3): 6-13.
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Liu Zhifei, Wang Chengshan. Braided River-Fan-Delta Depositional System of the Early Cretaceous Giabulin Formation in the Xigaze Region, Xizang(Tibet)[J]. Acta Sedimentologica Sinica, 1998, 16(3): 6-13.
Citation: Liu Zhifei, Wang Chengshan. Braided River-Fan-Delta Depositional System of the Early Cretaceous Giabulin Formation in the Xigaze Region, Xizang(Tibet)[J]. Acta Sedimentologica Sinica, 1998, 16(3): 6-13.
shu

西藏日喀则地区早白垩世恰布林组辫状河—扇三角洲沉积

  • 成都理工学院沉积研究所 成都 610059

基金项目: 国土资源部“九五”重大基础项目(9501101-02), 国家杰出青年科学基金(49625203)
详细信息
    作者简介:

    刘志飞,男,28岁,博士,沉积学,盆地分析　青藏高原地质

Braided River-Fan-Delta Depositional System of the Early Cretaceous Giabulin Formation in the Xigaze Region, Xizang(Tibet)

  • Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059

    摘要
  • 摘要: 雅鲁藏布江蛇绿岩带北侧发育的早白垩世恰布林组以其杂色砂砾岩易于野外识别，岩石组成主要为陆源碎屑岩。根据不同的形成机制和岩相特征，将恰布林组岩相划分为7种砾岩相、3种泥岩相和1种灰岩相，由下至上组合成辫状河亚相、扇三角洲平原亚相、扇三角洲前缘亚相和前扇三角洲亚相，呈现急剧退积型扇三角洲层序。沉积的古盐度在低盐度—半咸水范围，古环境判别也落入未定义—海水区，认为恰布林组沉积环境为陆相辫状河—退积型扇三角洲。物源区分析显示，来自于北方近源再旋回造山带中的板块俯冲混杂岩和火山切割弧至过渡弧为恰布林组提供主要物源，而且该组砾岩砾石成分含有大量蛇绿岩成分组合，从而说明早白垩世时期恰布林组北侧不远处极可能发育一套残余的蛇绿岩。
    Abstract: The Early Cretaceous Giabulin Formation, which is distributed along the north margin of the Yarlung Zang bo ophiolite suite, is easy to distinguish in the field. It is characterized by a sequence of ter-rigenous clasticrocks, principally mottled sandstones and conglomerates. Seven types of conglomerate, seven types of sandstone, three types of shale, and one limestone may be classified according to formation and their lithofacies characteristics. They comprise foursedimentary subfacies, from bottom to top: braid-ed river subfacies, fan-delta plain subfacies, fandelt a front subfacies, and profan-delt a subfacies. This progressio n makes up a retrog radational sequence taking together the global Cretaceous transgress con-dition. Paleosalinity of the Giabulin Formation was 12.0‰-20.0‰, and its paleoenvironments were inter-mediate between semi-brackish water and salt water. The sedimentary environments of the braided river of terrestrial facies and the fan-deltas of transitional facies can be concluded from the discussion above. Sediments of the Giabulin Formation were derived chiefly from recycled subduction complexes, and from dissected transitional island arcs. Those provenances were all distributed nearby to the north of the Yarlung Zang bo River. During deposition of the Giabulin Formation, the Tectonic settings was relatively passive in the early stage and active in the late stage.
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    • 参考文献(15)
  • [1] .尹集祥, 孙晓兴, 孙亦因等. 西藏南部日喀则地区双磨拉石岩系的地层学研究. 见: 中国科学院地质研究所集(3).北京: 科学出版社, 1988. 158～176
    [2] .刘宝王君, 余光明, 陈成生. 西藏日喀则地区第三系大竹卡组砾质扇三角洲—片状颗粒流沉积. 岩相古地理, 1990, (1): 1～ 11
    [3] .西藏自治区地质矿产局. 西藏自治区区域地质志. 北京: 地质出版社, 1993
    [4] .Ratschbacher L, Frisch W, Chen C, Pan G. Deformation and mo-tion along the southern margin of the Lhasa Block (Tibet) prior to and during the Asia-India collision. J. Geol., 1992, 16(1/2): 21～54
    [5] .Einsele G, Liu B, Dǜrr S D, et al. The Xigaze forearc basin: evo-lution and faciesarchitecture (Cretaceous, Tibet). Sediment. Ge-ol., 1994, 90: 1～32
    [6] .Yin A, Harrison T M, Kyerson F J, et al. Tertiary structural evolution of the Gandeset hrust system, Southeastern Tibet. J. Geol. Res., 1994, 99(B9): 18175～18201
    [7] .刘志飞, 王成善, 李祥辉. 西藏日喀则地区恰布林组地层研究. 成都理工学院学报, 1996, 23(2): 56～63
    [8] .Wang Cheng shan, Liu Zhifei, He Zhengwei, Lu Yan, Li Xi-anghui. Yarlung Zangbo paleo-suture zone infering from sedi-mentary and provenance analysis of Giabulin Formation, Xigaze region, Southern Tibet. In: A ngiolini L, Balini M, et al. eds. 12th Himalaya-Karakorum-Tibet International Workshop Abs tract Volume, Rome, 1997. 101
    [9] .Miall A D. Principles of sedimentary basin analysis. New York Berlin Heidelberg Tokyo: Springer-Verlag, 1984
    [10] .Allen P A. Sediments and processes on a small small-f low-dom-inated Devonianal luvial fan, Shetland Islands. Sediment. Geol., 1981, 29: 31～61
    [11] .Walker C T, Price N B. Departure curves for computing pale-osalinity from boron in illites and shalfs. AAPG Bull , 1963, 47(5): 833～841
    [12] .Couch E L. Calculation of paleos alinities from boron and clay mineral data. AAPG Bull, 1971, 55(10), 1829～1837
    [13] .Dickinson W R. Provenance, sediment despersal in relation to paleotectonics and paleogeography of sedimentary basins. In: Klienspehn K L, Paola C, eds. New perspectives in basin analy-sis. New York Berlin Heidelberg: Springer-Verlag, 1988
    [14] .Mcph erson J G, Shanmugam G, Moiola R J. Fan-deltas and braid delt as: Varieties of coarse-grained deltas. GSA Bull, 1988, 99: 331～340
    [15] .Allègre C J, Cou rlillot V and 33 others. Structure and evol ution of the Himalaya-Tibet orogenic belt. Nature, 1984, 307: 17～22
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出版历程
  • 收稿日期:  1997-09-24
  • 修回日期:  1998-01-15
  • 刊出日期:  1998-12-10

目录

    西藏日喀则地区早白垩世恰布林组辫状河—扇三角洲沉积

    • 成都理工学院沉积研究所 成都 610059
      • 基金项目:  国土资源部“九五”重大基础项目(9501101-02), 国家杰出青年科学基金(49625203)
      作者简介:

      刘志飞,男,28岁,博士,沉积学,盆地分析　青藏高原地质

    • 收稿日期: 1997-09-24
    • 修回日期: 1998-01-15
    • 刊出日期: 1998-12-10

    摘要: 雅鲁藏布江蛇绿岩带北侧发育的早白垩世恰布林组以其杂色砂砾岩易于野外识别，岩石组成主要为陆源碎屑岩。根据不同的形成机制和岩相特征，将恰布林组岩相划分为7种砾岩相、3种泥岩相和1种灰岩相，由下至上组合成辫状河亚相、扇三角洲平原亚相、扇三角洲前缘亚相和前扇三角洲亚相，呈现急剧退积型扇三角洲层序。沉积的古盐度在低盐度—半咸水范围，古环境判别也落入未定义—海水区，认为恰布林组沉积环境为陆相辫状河—退积型扇三角洲。物源区分析显示，来自于北方近源再旋回造山带中的板块俯冲混杂岩和火山切割弧至过渡弧为恰布林组提供主要物源，而且该组砾岩砾石成分含有大量蛇绿岩成分组合，从而说明早白垩世时期恰布林组北侧不远处极可能发育一套残余的蛇绿岩。

    English Abstract

    刘志飞, 王成善. 西藏日喀则地区早白垩世恰布林组辫状河—扇三角洲沉积[J]. 沉积学报, 1998, 16(3): 6-13.
    引用本文: 刘志飞, 王成善. 西藏日喀则地区早白垩世恰布林组辫状河—扇三角洲沉积[J]. 沉积学报, 1998, 16(3): 6-13.
    shu
    Liu Zhifei, Wang Chengshan. Braided River-Fan-Delta Depositional System of the Early Cretaceous Giabulin Formation in the Xigaze Region, Xizang(Tibet)[J]. Acta Sedimentologica Sinica, 1998, 16(3): 6-13.
    Citation: Liu Zhifei, Wang Chengshan. Braided River-Fan-Delta Depositional System of the Early Cretaceous Giabulin Formation in the Xigaze Region, Xizang(Tibet)[J]. Acta Sedimentologica Sinica, 1998, 16(3): 6-13.
    shu

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