Summary of the Late Triassic tectonic paleogeography in the Qinghai-Tibetan Plateau， China
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摘要: 遵循刘宝珺院士提出的“构造控盆、盆地控相”指导思想，在系统厘定地层格架和构造单元划分基础上，确定青藏高原巨型造山带晚三叠世构造-古地理从北往南依次发育：羌塘-三江多岛海、班公湖-双湖-怒江洋、冈底斯-喜马拉雅多岛海和若干次级构造-古地理单元。班公湖-双湖-怒江洋是分隔冈瓦纳大陆和欧亚大陆的特提斯大洋，南羌塘地块是漂浮在特提斯大洋中的块体。本次重点对北羌塘前陆盆地和北喜马拉雅被动大陆边缘盆地的沉积相带展布和古地理进行了研究。造成两个盆地沉积序列及古气候差别的主要因素是构造地质事件。构造事件决定了盆地性质，盆地性质又控制了沉积相带的空间展布。北喜马拉雅盆地位于冈瓦纳构造域，晚三叠世盆地基底南浅北深，继承了古生代构造离散型被动大陆边缘沉积，印支造山作用不发育；北羌塘盆地位于泛华夏构造域，晚三叠世发育印支挤压造山作用及其前陆盆地沉积记录。盆地分析研究表明，北羌塘南部江爱达日那和热觉茶卡等地下三叠统康鲁组底部均发现灰紫色中厚层复成分砾岩、含砾粗砂岩、细砂岩组成向上变细的海侵型地层结构，沉积相为滨岸三角洲；上三叠统土门格拉群沉积相为含煤盆地边缘三角洲。从沉积相展布型式和北东向古水流方向分析，三叠纪北羌塘沉积盆地的物源主要来自羌塘中部双湖造山剥蚀区或“中央隆起带”。Abstract: Based on the systematic analytical stratigraphic framework and tectonic unit division, following the guiding ideology of "tectonic controlled basin and basin controlled sedimentary facies" suggested by Liu Baojun academician, it is determined that the late Triassic tectonic paleogeography of the Qinghai-Tibetan Plateau giant orogenic belt developed the Qiangtang-Sanjiang multi-island sea, the Bangonghu-Shuanghu-Nujiang ocean, the Gangdis-Himalaya multi-island sea and several secondary tectonic-paleogeographic units from the north to the south. The Bangonghu -Shuanghu-Nujiang ocean is the Tethys ocean separating the Gondwana and the Eurasia continents, and the southern Qiangtang is a floating block in the Tethys ocean. This paper focuses on the sedimentary facies distribution and paleogeography of the northern Qiangtang foreland basin and the northern Himalayan passive continental margin basin. Tectonic events determined the nature of the basin, which in turn controls the spatial distribution of sedimentary facies belts. The northern Himalayan basin was located in the Gangwana tectonic domain, and the basement of the late Triassic basin deepened from the south to the north, inheriting the Paleozoic tectonic discrete passive continental margin deposits, and the Indosinian orogeny didn't develop at that time. The northern Qiangtang basin located in the Cathaysian tectonic domain, developed the Indosinian extrusion orogeny and foreland basin sedimentary records during the late Triassic. The basinal analysis shows that the bottom of the lower Triassic Kanglu formation in Jiangaidarina Mt. and Rejuechaka lake in the southern part of North Qiangtang Basin, occurred upward thinning and finning transgressive stratigraphic structures composed of gray-purple medium-thick bedding polymictic conglomerates, gravel-bearing coarse sandstones and fine sandstones, and the sedimentary facies was shore-delta. The sedimentary facies of the upper Triassic Tumengera Group were coal-bearing basin marginal delta. Analysis of NE direction paleocurrent and sedimentary facies distribution pattern indicates the material sources of the Triassic northern Qiangtang basin were mainly from the Shuanghu orogenic denuded zone at the middle of Qiangtang or "Qiangtang central uplift belt".
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Key words:
- late Triassic /
- sedimentary facies /
- tectonic paleogeography /
- Qinghai-Tibetan Plateau
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[1] 西藏自治区地质矿产局. 西藏自治区区域地质志[M].北京:地质出版社,1994.
[2] 西藏自治区地质矿产局. 西藏自治区岩石地层[M].武汉:中国地质大学出版社,1997.
[3] 潘桂棠,王立全,姚冬生,等.青藏高原及邻区地质图说明书[M].北京:地质出版社,2013.
[4] 潘桂棠,王立全,张万平,等.青藏高原及邻区大地构造图说明书[M].北京:地质出版社,2013.
[5] 刘宝珺,许效松,潘杏南,等.中国南方古大陆沉积地壳演化与成矿[M].北京:科学出版社,1993.
[6] 朱同兴,江新胜,冯心涛,等.青藏高原及邻区中生代构造-古地理图及说明书[M].北京:地质出版社,2013.
[7] 沈上越,张保民,魏启荣. "三江"地区江达-维西弧南段火山岩特征研究[J]. 特提斯地质, 1995,(19):38-53.
[8] 王立全,潘桂棠,李定谋,等.金沙江弧-盆系时空结构及地史演化[J].地质学报, 1999,73(3):206-218.
[9] 莫宣学,路凤香,沈上越,等.三江特提斯火山作用与成矿[M].北京:地质出版社,1993.
[10] 牟传龙,王立全.云南德钦及邻区晚三叠世火山沉积盆地演化[J].矿物岩石,2000,20(3):23-28.
[11] 王立全,李定谋.云南德钦鲁春-红坡牛场上叠裂谷盆地演化[J].矿物岩石,2001, 21(3):81-89.
[12] 朱同兴,于远山,金灿海,等.中华人民共和国区域地质调查报告(西藏1:25万多格错仁幅)[M].武汉:中国地质大学出版社,2012.
[13] 朱同兴,董瀚,李才,等.青藏高原北羌塘地区晚三叠世地层展布和沉积型式[J].沉积与特提斯地质,2005,25(3):18-23.
[14] ZHU Tongxing,FENG Xintao,WANG Xiaofei,et.al.Reconstruction of the Triassic tectonic lithofacies paleogeography in Qiangtang region, northern Qinghai-Tibet plateau, China[J].Acta Geologica Sinica(English Edition),2013,87(2):378-394.
[15] 朱同兴,李宗亮,李才,等. 藏北双湖地区三叠纪地层新资料[J].地质通报,2005,24(12):1127-1134.
[16] 赵政璋,李永铁,叶和飞,等. 青藏高原地层[M].北京:科学出版社,2001.
[17] 朱同兴,李宗亮,张惠华,等.中华人民共和国区域地质调查报告(西藏1:25万江爱达日那幅)[M].武汉:中国地质大学出版社,2010.
[18] 翟庆国,李才.藏北羌塘菊花山那底岗日组火山岩锆石SHRIMP定年及其意义[J],地质学报,2007,81(6):795-800.
[19] 王剑,汪正江,陈文西,等.藏北北羌塘盆地那底岗日组时代归属的新证据[J].地质通报,2007,26(4):404-409.
[20] 付修根,王剑,汪正江,等.藏北羌塘盆地菊花山地区火山岩SHRIMP锆石U-Pb年龄及地球化学特征[J].地质论评,2008,54(2):232-242.
[21] 李才,翟庆国,董永胜,等.青藏高原羌塘中部果干加年山上三叠统望湖岭组的建立及意义[J].地质通报,2007,26(8):1003-1008.
[22] 姚华舟,白云山,曾波夫,等.长江源发现晚三叠世火山弧[J].地学前缘,2004,11(2):564.
[23] 白云山,李莉,牛志军,等.羌塘中部各拉丹冬一带鄂尔陇巴组火山岩特征及其构造环境[J].地球学报,2005,26(2):113-120.
[24] 李莉,牛志军, 白云山, 等.长江源各拉丹冬一带晚三叠世那底岗日组[J].地层学杂志,2012,(1):49-54.
[25] 付修根,王剑,谭富文,等.青藏高原羌塘盆地东部鄂尔陇巴组火山岩的锆石SHRIMP U-Pb年龄及其地质意义[J].地质通报,2009,28(5):15-21
[26] 李才,程立人,胡克,等.西藏龙木错-双湖古特提斯缝合带研究[M].北京:地质出版社,1995.
[27] 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岗瓦纳北界[J].地学前缘,2006,13(4):136-147
[28] 翟庆国,李才,程立人,等.西藏羌塘角木日地区二叠纪蛇绿岩的地质特征及意义[J].地质通报, 2004, 23(12):1228-1230.
[29] 朱同兴,张启跃,董瀚,等.藏北双湖地区才多茶卡一带构造混杂岩中发现晚泥盆世和晚二叠世放射虫硅质岩[J].地质通报, 2006, 25(12):1413-1418.
[30] 陆济璞,张能,黄位鸿,等. 藏北羌塘中北部红脊山地区蓝闪石+硬柱石变质矿物组合的特征及其意义[J].地质通报, 2006, 25(1):70-75.
[31] 冯心涛,朱同兴,李才,等.藏北双湖地区上三叠统肖茶卡群的重新厘定及其地质意义[J].地质通报, 2005, 24(12):1135-1140.
[32] 曾庆高,毛国政,王保弟,等.中华人民共和国区域地质调查报告(西藏1:25万日干配错幅)[M].武汉:中国地质大学出版社,2011.
[33] 潘桂棠.初论班公湖-怒江结合带[J].青藏高原地质文集, 1983, (12):229-242.
[34] 王成善,夏代祥,周详,等.雅鲁藏布江缝合带-喜马拉雅山地质[M].北京:地质出版社,1999.
[35] 王冠民,钟建华.班公湖-怒江构造带西段三叠纪-侏罗纪构造-沉积演化[J].地质论评,2002,48(3):297-303.
[36] 邱瑞照,周肃,邓晋福,等.西藏班公湖-怒江西段舍马拉沟蛇绿岩中辉长岩年龄测定-兼论班公湖-怒江蛇绿岩带形成时代[J].中国地质,2004,31(3):262-268.
[37] 张玉修,张开均,黎 兵,等.西藏改则南拉果错蛇绿岩中斜长花岗岩锆石SHRIMP U-Pb年代学及其成因研究[J].科学通报,2007,52(1):100-106.
[38] 夏斌,徐力峰,韦振权,等.西藏东巧蛇绿岩中辉长岩锆石SHRIMP定年及其地质意义[J].地质学报,2008,82(4):528-531.
[39] 潘桂棠,莫宣学,侯增谦,等.冈底斯造山带的时空结构及演化[J].岩石学报,2006,22(3):521-533.
[40] 曲永贵,王永胜,张树岐,等.西藏申扎地区晚三叠世多布日组地层剖面的启示-对冈底斯印支运动的地层学制约[J].地质通报, 2003,22(7):470-473.
[41] 纪占胜,姚建新,武桂春.西藏冈底斯西段措勤地区海相三叠系的划分[J].地质通报,2007,26(8):947-952.
[42] 李才,王天武,李惠民,等. 冈底斯地区发现印支期巨斑花岗闪长岩——古冈底斯造山的存在证据[J].地质通报, 2003,22(5):364-366.
[43] 和钟铧,杨德明,郑常青,等.西藏冈底斯带门巴地区印支期花岗岩地球化学特征及其构造意义[J].地质通报, 2005,24(4):354-359.
[44] 王希斌,鲍佩声,肖序常. 雅鲁藏布江蛇绿岩[M].北京:测绘出版社,1987.
[45] 余光明,王成善. 西藏特提斯沉积地质[M].北京:地质出版社,1990.
[46] 潘桂棠, 陈智梁, 李兴振, 等.东特提斯地质构造形成演化[M].北京:地质出版社, 1997.
[47] 尹安.喜马拉雅-青藏高原造山带地质演化-显生宙亚洲大陆生长[J].地球学报,2001,22(3):193-230.
[48] 莫宣学,赵志丹,邓晋福,等.印度-亚洲大陆主碰撞过程的火山作用响应[J].地学前缘,2003,10(3):135-148.
[49] 王成善,李祥辉.再论印度-亚洲大陆碰撞的启动时间[J].地质学报, 2003,77(1):16-24.
[50] 朱弟成,潘桂棠,莫宣学,等.特提斯喜马拉雅带中段三叠纪火山岩地球化学和岩石成因[J].岩石学报, 2006,22(4):804-816.
[51] 高洪学,宋子季.西藏泽当蛇绿混杂岩研究新进展[J].中国区域地质,1995,(4):316-322.
[52] 江新胜,朱同兴,冯心涛,等.藏南特提斯晚三叠世海岸风成沙丘的发现及其意义[J].成都理工大学学报, 2003, 30(5):417-452.
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