Reestablishment and scientific significance of the Ocean plate geology in the Southern Tibet Plateau, China
-
摘要: 在复杂碰撞造山带中发现、识别和重建能够揭示从洋中脊形成到海沟俯冲消亡洋陆转换过程的洋板块地层（OPS）单元及岩石组合序列，是大陆动力学研究的重大课题。本文在冈底斯地块南部与雅鲁藏布江结合带东段地区发现和识别出大量洋岛、海山、洋内弧、楔顶盆地、大洋盆地等洋板块地层。通过对该洋板块地层岩石组合序列、产出状态与变形变质特征与形成时代、构造环境等的初步研究，得出如下新的认识：（1）新发现的洋板块地层单元是雅鲁藏布江结合带东段在特提斯洋演化过程俯冲消减而形成增生杂岩带的重要组成部分；（2）在青藏高原南部古特提斯和新特提斯洋同时存在并连续演化；（3）南冈底斯带在中生代具有新特提斯增生楔和增生弧的地质背景，并且该增生楔是冈底斯南缘加厚新生下地壳的重要物质组成部分，对斑岩铜矿的形成起了促进作用。
-
关键词:
- 雅鲁藏布江结合带东段 /
- 洋板块地质 /
- 重建 /
- 特提斯演化 /
- 意义
Abstract: Discovery and reestablishment of the ocean plate stratigraphy unit (OPS) and rock assemblage sequence in the complex collisional orogenic belt during the large scale ocean-continent conversion are important geodynamical and geological frontier issues. This paper reported new discoveries of the ocean plate stratigraphy including the ocean island, seamount, intra-oceanic arc, wedge-top basin, and oceanic basin, which are exposed at the eastern part of the Gangdese metallogenic belt and the Indus-Tsangpo Suture Zone in the Southern Tibet Plateau. Through detailed research on their rock assemblage sequence, occurrence, deforming, metamorphism, formation age and tectonic setting, we recognized that (1) the ocean plate stratigraphy unit is an important part of the accretionary complex, which is the result of the continental accretion in the southern Tibet Plateau during the Tethys evolution; (2) It is a continuous evolution from the paleo-Tethys ocean to neo-Tethys ocean in the Southern Tibet Plateau; and (3) The Mesozoic southern Gangdese belt is characterized by its geological setting of the neo-Tethys accretionary wedge, accretionary arc and the accretionary wedge. It is an important part of the thickening new lower crust at the southern margin of Gangdese, facilitating the formation of porphyry copper deposits in the areas.-
Key words:
- Eastern Yarlung Zangbo suture /
- Ocean plate geology /
- Reestablishment /
- Significance /
-
-
[1] 潘桂棠,肖庆辉,陆松年等,大地构造相的定义、划分、特征及其鉴别标志,地质通报,2008,27(10):1613-1637.
[2] 潘桂棠,肖庆辉,张克信等,大陆中洋壳俯冲增生杂岩带特征与识别的重大科学意义,地球科学,2019, 44(5):1544-1561.
[3] 张克信,何卫红,徐亚东等,中国洋板块地层分布及构造演化, 地学前缘,2016,23(6):24-30.
[4] 冯益民,张越,大洋板块地层(OPS)简介及评述,地质通报, 2018,37(4):523-531.
[5] 李廷栋,肖庆辉,潘桂棠等,关于发展洋板块地质学的思考,地球科学,2019,44(5):1441-1451.
[6] 潘桂棠, 莫宣学, 侯增谦等,冈底斯造山带的时空结构及演化,岩石学报,2006,22(3):521-533.
[7] 侯增谦,曲晓明,杨竹森等, 2006,青藏高原碰撞造山带:芋. 后碰撞伸展成矿作用[J]. 矿床地质, 25(6):629-651.
[8] 许志琴,杨经绥,李文昌等,青藏高原中的古特提斯体制与增生造山作用,岩石学报,2013(6):1847-1860.
[9] 张泽明,丁慧霞,董昕等,冈底斯弧的岩浆作用:从新特提斯俯冲到印度-亚洲碰撞,地学前缘,2018,25(06):78-91.
[10] 张泽明,丁慧霞,董昕等,冈底斯岩浆弧的形成与演化,岩石学报,2019,35(02):275-294.
[11] 吉林大学,2019,西藏松多地区4幅1:5万区域地质调查成果报告(内部报告).
[12] 王斌,解超明,李才,青藏高原松多地区温木朗蛇绿岩的发现及其地质意义,地质通报,2017,36(11):2076-2081.
[13] 成都理工大学,2019,西藏唐加地区4幅1:5万区域地质调查成果报告(内部报告).
[14] Wang, B., Xie, C. M*., Fan, J. J., Wang, M., Yu, Y. P., Dong, Y. C., Hao, Y. J., 2019. Genesis and tectonic setting of Middle Permian OIB-type mafic rocks in the Sumdo area, southern Lhasa terrane. Lithos, 324-325:429-438.
[15] 杨经绥,许志琴,耿全如,中国境内可能存在一条新的高压/超高压(?)变质带-青藏高原拉萨地体中发现榴辉岩带,地质学报,2006,80(12):1787-1792.
[16] 杨经绥,许志琴,李天福,青藏高原拉萨地块中的大洋俯冲型榴辉岩:古特提斯洋盆的残留? 地质通报,2007,26(10):1277-1287.
[17] 陈松永,杨经绥,罗立强,西藏拉萨地块MORB型榴辉岩的岩石地球化学特征,地质通报,2007,26(10):1327-1339.
[18] 陈松勇. 2010. 西藏拉萨地块中古特提斯缝合带的厘定. 中国地质科学院,博士学位论文.
[19] 董宇超,解超明,于云鹏等,西藏工布江达县龙崖松多榴辉岩的发现及地质意义,地质通报,2018,37(8):1464-1471.
[20] 刘鸿飞,刘焰,旁那石榴蓝闪片岩特征及其构造意义,岩石矿物学杂志,2009,28(03):199-214.
[21] Cheng H,Zhang C,Jeffrey D,et al. 2012. Zircon U-Pb and garnet Lu-Hf geochronology of eclogites from the Lhasa Block, Tibet. Lithos,155:341-359.
[22] Cheng H,Liu YM,Jeffrey D,et al. 2015. Combined U-Pb,Lu-Hf, Sm-Nd and Ar-Ar Multichronometric Dating on the Bailang Eclogite Constrains The Closure Timing of the Paleo-Tethys Ocean in the Lhasa Terrane, Tibet. Gondwana Research, 28, 1482-1499.
[23] Yang JS,Xu ZQ,Li ZL,et al. 2009. Discovery of an eclogite belt in the Lhasa block, Tibet:A new border for Paleo-Tethys?. Journal of Asian Earth Sciences,34,76-89.
[24] 耿全如,王立全,潘桂棠,西藏冈底斯带洛巴堆组火山岩地球化学及构造意义,岩石学报,2007,23(11):2699-2714.
[25] 解超明, 宋宇航, 王明, 等. 2019. 冈底斯中部松多岩组形成时代及物源:来自碎屑锆石U-Pb年代学证据. 地球科学, 44(7):2224-2233.
[26] 董昕,张泽明,耿官升,青藏高原拉萨地体南部的泥盆纪花岗岩. 岩石学报,2010,26(7):2226-2232.
[27] Yun-Peng Yu, Chao-Ming Xie a, Jian-Jun Fan a, Ming Wang, Yu-Chao Dong,BinWang,Yu-JieHao, Zircon U-Pb geochronology and geochemistry of Early Jurassic granodiorites in Sumdo area, Tibet:Constraints on petrogenesis and the evolution of the Neo-Tethyan Ocean,Lithos,2018, (320-321):134-143.
[28] 西藏自治区地质矿产勘查开发局第五地质大队,2019,西藏桑耶地区4幅1:5万区域地质调查成果报告(内部报告).
[29] 西藏自治区地质矿产勘查开发局地热地质大队,2019,西藏尼木地区3幅1:5万区域地质调查成果报告(内部报告).
[30] 西藏自治区地质矿产勘查开发局第六地质大队,2019,西藏曲水地区3幅1:5万区域地质调查成果报告(内部报告).
[31] 董彦辉,许继峰,曾庆高等,存在比桑日群弧火山岩更早的新特提斯洋俯冲记录么? 岩石学报,2006,22(3):661-668.
[32] 耿全如,潘桂棠,金振民等,西藏冈底斯带叶巴组火山岩地球化学及成因,地球科学,2005,30(6):747-760.
[33] 黄丰,早侏罗世叶巴组与桑日群火山岩:特提斯洋俯冲过程中的陆缘弧与洋内弧? 岩石学报,2015,31(7):2089-2100.
[34] 许继峰,康志强,朱弟成等,桑日群火山岩洋内俯冲的证据-兼论拉萨地块南缘中生代洋弧基底的构造深化,2009年全国岩石学与地球动力学研讨会论文摘要,2009,150.
[35] Chen D, Luo H, Wang X, Xu B, Matsuoka A. Late Anisian radiolarian assemblages from the Yarlung-Tsangpo Suture Zone in the Jinlu area, Zedong, southern Tibet:Implications for the evolution of Neotethys. Island Arc. 2019:1-10. DOI:https://doi.org/10.1111/iar.12302.
[36] 刘维亮,夏斌[40]白文吉,方青松,张仲明等。西藏雅鲁藏布江蛇绿岩带罗布莎地幔橄榄岩的成因,岩石矿物学杂志, 1999,18(3):193-216.
[37] 白文吉,方青松,张仲明等. 西藏雅鲁藏布江蛇绿岩带罗布莎地幔橄榄岩的成因, 岩石矿物学杂志,1999, 18(3):193-216.
[38] 王成善,李亚林,刘志飞等;雅鲁藏布江蛇绿岩再研究,从地质调查到矿物记录,地质学报,2005,79(3):323-330.
[39] 叶培盛,江万,吴珍汉等;西藏泽当-罗布莎蛇绿岩的地球化学特征及其构造意义,现代地质,2006,20(3):370-377.
[40] 韦栋梁,夏斌,周国庆等,西藏泽当英云闪长岩的地球化学和Sr-Nd同位素特征:特提斯洋内俯冲的新证据,中国科学D辑,地球科学,2007,37(4):442-450.
[41] 徐向珍,杨经绥,巴登珠等,雅鲁藏布江蛇绿岩带的康金拉铬铁矿中发现金刚石,岩石学报,2008,24(7):1453-1462.
[42] 白文吉,杨经绥,施倪承等;西藏罗布莎蛇绿岩地幔中首次发现超高压矿物方铁矿和自然铁,地质论评,2004,50(2):184-188.
[43] 吴福元,刘传周,张亮亮,张畅,王建刚,纪伟强,刘小驰. 雅鲁藏布蛇绿岩——事实与臆想[J]. 岩石学报, 2014, 30(02):293-325.
[44] 甘肃省地质矿产勘查开发局第三地质矿产勘查院,2019,西藏乃东县地区4幅1:5万区域地质调查成果报告(内部报告).
[45] 李海平,张满社;西藏桑日地区桑日群火山岩岩石地球化学特征。西藏地质,1995,1:84-92.
[46] H佴bert R, Bezard R, Guilmette C, et al. The Indus-Yarlung Zangbo ophiolites from Nanga Parbat to Namche Barwa syntaxes, southern Tibet:First synthesis of petrology, geochemistry, and geochronology with incidences on geodynamic reconstructions of Neo-Tethys. Gondwana Research, 2012, 22:377-397.
[47] 钟立峰,夏斌,崔学军,周国庆,陈根文,韦栋梁. 藏南罗布莎蛇绿岩壳层熔岩地球化学特征及成因[J]. 大地构造与成矿学,2006(02):231-240.
[48] 王立全,朱弟成,潘桂棠;青藏高原1:25万区域地质调查主要成果和进展综述(南区),地质通报,2004,23(5-6),413-420.
[49] 中国地质调查局成都地质调查中心,2019,西藏曲松地区4幅1:5万区域地质调查成果报告(内部报告).
[50] 胡修棉,王建刚,安慰,利用沉积记录精确约束印度-亚洲大陆碰撞时间与过程,中国科学:地球科学,2017,47(3):5-27.
[51] 李才,黄小鹏,翟庆国等,龙木错-双湖-吉塘板块缝合带与青藏高原冈瓦纳北界. 地学前缘,2006,13(4):136-147.
[52] 李才,翟庆国,陈文,青藏高原龙木错-双湖板块缝合带闭合的沉积学证据-来自果干加年山蛇绿岩与流纹岩Ar-Ar和SHRIMP年龄制约,岩石学报,2007,23(5):911-918.
[53] 李光明, 段志明, 刘波等,西藏班公湖-怒江结合带北缘多龙地区侏罗纪增生杂岩的识别及意义,地质通报,2011,30(8):1256-1260.
[54] 潘桂棠,王立全,李荣社,多岛弧盆系构造模式:认识大陆地质的关键,沉积与特提斯地质,2012,32(3):1-20.
[55] 王保弟,王立全,许继峰等,班公湖-怒江结合带洞错地区舍拉玛高压麻粒岩的发现及其地质意义,地质通报,2015,34(9):1605-1661.
[56] 徐向珍,杨经绥,李天福. 2007. 青藏高原拉萨地块松多榴辉岩的锆石SHRIMP U-Pb年龄及锆石中的包裹体. 地质通报, 26(10):1340-1355.
[57] Isabella R. C. McDermid, Jonathan C. Aitchison, Aileen M. Davis,T. Mark Harrison, M. Grove,The Zedong terrane:a Late Jurassic intra-oceanic magmatic arc within the Yarlung-Tsangpo suture zone, southeastern Tibet,Chemical Geology,2002,(187):267-277.
[58] 侯增谦,大陆碰撞成矿论,地质学报,2010,84(1):30-58.
[59] 董昕,张泽明,拉萨地体南部早侏罗世岩浆岩的成因和构造意义. 岩石学报,2013,29(6):1933-1948.
[60] 莫宣学,董国臣,赵志丹等,西藏冈底斯花岗岩的时空分布特征及地壳生长演化信息,高校地质学报,2005,11(3):281-29.
[61] 张宏飞,徐旺春,郭建秋等,冈底斯南缘变形花岗岩锆石U-Pb年龄和Hf同位素组成:新特提斯洋早侏罗世俯冲作用的证据,岩石学报,2007,23(6):1347-1353.
[62] 张雨轩,解超明,于云鹏等,早侏罗世新特提斯洋俯冲作用-来自松多闪长岩锆石U-Pb定年及Hf同位素制约,地质通报,2018,37(8):1387-1399.
[63] 朱弟成,潘桂棠,王立全等,西藏冈底斯带中生代岩浆岩的时空分布和相关问题的讨论,地质通报,2008,27(9):1535-1550.
[64] 朱弟成,潘桂棠,王立全等,西藏冈底斯带侏罗纪岩浆作用的时空分布及构造环境,地质通报,2008,27(4):458-468.
[65] 侯增谦,王涛. 同位素填图与深部物质探测(域):揭示地壳三维架构与区域成矿规律[J]. 地学前缘,2018,25(06):20-41.
[66] 朱弟成,王青,赵志丹,牛耀龄,侯增谦,潘桂棠,莫宣学. 大陆边缘弧岩浆成因与大陆地壳形成[J]. 地学前缘,2018,25(06):67-77.
[67] Zheng, Y. C., Liu, S. A., Wu, C. D., et al., Cu isotopes reveal initial Cu enrichment in sources of giant porphyry deposits in a collisional setting. Geology 2019, 47, 135-138.
[68] 侯增谦,郑远川,耿元生. 克拉通边缘岩石圈金属再富集与金-钼-稀土元素成矿作用[J]. 矿床地质,2015,34(04):641-674.
-
计量
- 文章访问数: 1570
- PDF下载数: 350
- 施引文献: 0
下载: