共查询到18条相似文献，搜索用时 156 毫秒
1.
雅鲁藏布江蛇绿岩被时代连续的日喀则群沉积覆盖及其形成时代(120-110Ma)与冈底斯弧开始发育的时代(115-100Ma)十分相近的事实使人们有理由提出:雅鲁藏布江蛇绿岩是否代表着印度板块与拉萨地块间的特提斯-喜玛拉雅洋残迹的疑问。根据近期的研究,笔者认为雅鲁藏布江蛇绿岩不是形成于三叠纪的特提斯-喜玛拉雅洋的残迹,而是特提斯-喜玛拉雅洋向拉萨地块俯冲的初期(阿普第-阿尔必期),由俯冲作用在冈底斯弧前地区引发的海底扩张作用形成的一种俯冲带上叠型蛇绿岩(supra-subduction zone ophiolites).至森诺曼期,弧前海底扩张作用停止,雅鲁藏布江蛇绿岩开始向南仰冲,在其南侧形成增生杂岩楔。仰起的蛇绿岩开始向日喀则弧前盆地提供蛇绿质碎屑,如冲堆组。森诺曼期-土仑期,盆地接受了一套深水复理石沉积,沉积物源部分来自南部边缘脊的蛇绿质碎屑,而大部分则来自北侧的弧火山岩和岩浆岩碎屑。森诺期-路坦丁期,盆地逐渐变浅,接受了浅海-滨海沉积,物源均来自北部的岩浆弧。至始新世末期,发育在盆地南侧的增生杂岩楔与印度板块发生碰撞,日喀则弧前盆地闭合。 相似文献
2.
本文所指的西藏南部范围,除包括喜马拉雅山地区之外,尚包括部分冈底斯山在内,南起聂拉木,北达羊八井。在这范围内,地质构造上分为以下几个构造带:高喜马拉雅古陆块、低分水岭边缘海、藏南陆间小洋盆、雅鲁藏布江蛇绿岩带、日喀则弧前盆地、冈底斯火山-岩浆岛弧、拉萨弧后盆地和念青唐古拉微大陆等(见图1)。 相似文献
3.
沿雅鲁藏布江缝合带分布的柳区砾岩是喜马拉雅造山作用过程中重要的沉积记录。然而,目前对该套地层的构造属性仍存在不同的认识,因为尚未发现来自冈底斯中酸性的火山岩砾石,部分学者认为其是在印度和洋内岛弧碰撞形成的。本次工作对柳区出露的柳区砾岩进行了详细的剖面实测、沉积学观察和物源区分析。地层由厚层的砾级到巨砾级的砾岩以及相对较薄层的砂岩和泥岩组成,砾石包括硅质岩、基性-超基性岩、石英砂岩、岩屑砂岩以及板岩和千枚岩。砾岩分选差,磨圆差,颗粒支撑和基质支撑均发育,根据岩相组合判断其形成于冲积扇和辫状河环境。较大的砾径以及极低的结构成熟度表示为近源堆积,暗示雅鲁藏布江蛇绿岩带为该套砾岩的重要源区,而特提斯喜马拉雅带为板岩和片岩的主要源区。岩屑砂岩的碎屑颗粒统计结果显示岩屑的含量为82%~85%,其中沉积岩屑为主(82%~95%),石英颗粒以单晶石英为主。碎屑锆石U-Pb年龄有453~579Ma和737~889Ma二个主要的范围,而缺少200~400Ma的锆石年龄。上述观测都说明日喀则弧前盆地、雅鲁藏布蛇绿岩带和特提斯喜马拉雅为柳区砾岩的重要物源区。由于柳区砾岩内部含有日喀则弧前盆地提供的物源,所以柳区砾岩是印度-欧亚板块碰撞之后沉积的。而柳区砾岩内各成分的变化反应源区对物源贡献的变化,同时记录了造山带隆升的历史,具体表现为印度-欧亚板块碰撞后,首先雅鲁藏布江蛇绿岩带和日喀则弧前盆地相对较快隆升,并遭受剥蚀,为柳区砾岩的沉积提供初始的物源,随着印度板块的俯冲,特提斯喜马拉雅带开始隆升,成为了柳区砾岩的物源,主要提供板岩和千枚岩。进一步的俯冲使得蛇绿岩带大幅度隆升而阻碍了日喀则弧前盆地和冈底斯继续提供物源,使得柳区砾岩上段石英砂岩中缺少火山岩石英和再旋回的石英颗粒。 相似文献
4.
G. Einsele S. Dürr W. Frisch 刘光华 H. P. Luterbacher L. Ratschbacher W. Ricken J. Wendt A. Wetzel 刘宝珺 余光明 郑海翔 《沉积与特提斯地质》1993,(1):3-31,56
研究区位于拉萨地块及其深成岩类(冈底斯带)以南沿印度河-雅鲁藏布江缝合带的120km范围内。在圈捕洋壳或过渡地壳顶部的藏南日喀则弧前盆地的演化始于中白垩世。原先的被动陆缘沉积残余,特别是浅水碳酸盐,保存于强烈变形(缩短约65％)和部分侵蚀的盆地充填物的北缘。保存的弧前复理石沉积厚达6—8km,主要由与俯冲有关的火山弧(冈底斯带)排出的火山碎屑(安山岩质和安粗岩质)物质组成。除诸如陆棚碳酸盐之类的再搬运的盆内组分之外,较深侵蚀面处或较远源的深成岩和沉积岩均提供盆地充填物。可划分出5个主要的深海水道体系作为位置大体固定的点源。水道中的水流方向总是指向南面的生长加积楔或俯冲带,因此指示该盆地永久性地充填到外脊并逐渐变浅。弧前复理石至少可细分为三个巨层序,从宽阔而切割较深的粗粒水道充填物开始,而以半远洋泥灰岩(沉积于碳酸盐补偿深度CCD之上)和黑色页岩告终。水道的侧向迁移、水道舌状体的转换以及火山脉动产生了主要为向上变细的高频率旋回。弧前盆地内的海相沉积作用于麦斯特里希特期(Maastrichtian)或古新世结束,代之以富含源自深侵蚀的岩浆弧的粗碎屑的始新统一渐新统秋乌组(与凯拉斯和更西的印度河磨拉石等时)河流沉积。因为弧前复理石和磨拉石型秋乌组均在中新世(?)同期变形,我们认为秋乌组代表海相弧前盆地充填作用在大陆的继续,如加利福尼亚大峡谷弧前盆地中观察到的一样。 相似文献
5.
印度大陆和欧亚大陆的拉萨地块于第三纪初会聚、碰撞后形成雅鲁藏布江碰撞缝合带(YZS),缝合带的位置是以现存的日喀则弧前盆地和蛇绿岩套为标志。 这一缝合带的深部结构是什么样?碰撞后发生的陆内俯冲带位于什么地方?变形范围是 相似文献
6.
沿雅鲁藏布江缝合带分布的日喀则群(K_2TK)砂泥质细粒复理石中发育着一种独特的沉积单元——蛇绿岩质砂砾质海底扇。这些扇体规模小,内扇和中扇相序典型。无论是内扇还是中扇,水道都特别发育,而且水道游荡作用明显。盛行砂砾质高密度浊流和粘性碎屑流沉积,沉积物粒度粗,含大量卵石级以上的粗碎屑,具有近源、快速堆积的特点。其碎屑组分为世界现代和古代海底扇沉积所罕见,主要是蛇绿岩碎屑,并含少量岛弧火山-岩浆岩碎屑和老地层的碎屑。这些扇体具有活动边缘型海底扇的典型特征,但又有其特殊性,它们发育在雅鲁藏布洋盆闭合、印度板块与藏北板块开始碰撞时的残留复理石盆地边缘。板块碰撞导致蛇绿岩质杂岩体和洋壳物质逆冲、抬升形成一个外弧造山带。该外弧造山带成为这些扇体的主要物源区。同时,强烈的逆掩和纳布作用也可将部分岛弧岩和老地层带到残留盆地边缘,一起作为来源母岩。 相似文献
7.
满大勒克蛇绿岩属于南天山晚古生代蛇绿岩带,主要由蛇纹石化橄榄岩、玄武岩和含放射虫硅质岩组成。其中蛇纹岩富含铬铁矿,并具有豆荚状特征。显微镜观察和电子探针分析表明,铬铁矿具有明显的环带结构,从核部到边部呈现出由铬尖晶石到铬铁矿到磁铁矿的变化特征,元素组成上具有由富Al和Cr、贫Fe到贫Al和Cr、富Fe的变化趋势。利用铬铁矿(铬尖晶石)核部矿物的化学成分,得出铬尖晶石的结晶温度为1359～1394℃,平均1379℃;压力为2.76～3.00GPa,平均2.87GPa;相对于FMQ缓冲剂的地幔氧逸度为FMQ-1.50～FMQ-2.92log单位,平均值为FMQ-2.14log单位;地幔熔融程度F为16.7%～18.0%。结合已有研究成果,推测满大勒克蛇绿岩的基底橄榄岩单元源区为石榴石二辉橄榄岩,形成于亏损的软流圈地幔,对应的大地构造位置为弧前盆地。研究区铬尖晶石的环带特征显示其经历了温度由高到低、氧逸度由低到高的演变,反映了满大勒克蛇绿岩套的橄榄岩单元经历了高温高压的地幔环境(低氧逸度),之后随构造变动被推覆到地壳,定位之后又经历了区域变质作用的演化过程(高氧逸度)。 相似文献
8.
冈底斯弧前区域地层沉积记录,对新特提斯洋消亡和印度-亚洲碰撞过程的研究具有十分重要的意义。位于西藏南部札达地区的达机翁组,北邻冈底斯岩浆弧,南靠雅鲁藏布江缝合带。岩石组成主要包括砾岩、岩屑砂岩、泥页岩和灰岩等。沉积环境分析认为达机翁组形成于扇三角洲相环境。火山灰锆石U-Pb定年、碎屑锆石最年轻年龄以及底栖有孔虫化石组合共同约束达机翁组的形成时代为晚白垩世-始新世早期(即ca.73～49Ma)。物源区分析结果表明达机翁组物源类似于区域上分布的日喀则弧前盆地沉积,直接以北侧冈底斯岩浆弧为主要物质源区。通过与区域弧前沉积对比,为冈底斯弧前盆地海相地层时代提供制约,结果显示新特提斯洋在亚洲大陆南缘的弧前海退存在东西方向上的穿时性,即海水自东向西逐渐退出,并最终在～49Ma退出冈底斯-拉达克弧前区域。 相似文献
9.
上扬子会泽地区早三叠世飞仙关组主要为河流相的紫红色砂岩,物源主要来自于西部和西北部。碎屑重矿物组合表明物源主要来自于岩浆岩,且重矿物中发现大量碎屑铬尖晶石和锆石。本文运用电子探针微区成分分析和碎屑锆石U-Pb测年方法,对上扬子早三叠世飞仙关组砂岩中铬尖晶石和碎屑锆石进行分析。铬尖晶石电子探针化学成分分析显示,其具有高铬、低Fe~(3+)和高TiO_2含量的特征,源岩分析指示这些铬尖晶石来源于与洋岛/板内、岛弧以及大火成岩省相关的火成岩。同时,碎屑锆石LA-ICP-MS U-Pb年龄测定表明,飞仙关组的物源主要来自于248~272Ma和715~997Ma的岩浆岩。铬尖晶石和碎屑锆石综合分析表明,248~272Ma的物源岩石具有大火成岩省玄武岩特征,主要为峨眉山玄武岩及同期基性侵入岩;715~997M的物源为洋岛/板内玄武岩类,主要为研究区周缘与新元古代苏雄组及其同期的岩浆岩;铬尖晶石指示的岛弧性质物源则可能源自1000~1100Ma的岩浆岩。同时,碎屑锆石还指示古元古代和早寒武世发育岩浆作用,且存在古老的新太古代结晶基底。这些资料为上扬子地区构造演化提供了沉积学的证据。 相似文献
10.
《矿物岩石地球化学通报》2018,(6)
为了研究蛇绿岩型豆荚状铬铁矿床的成因和构造环境,对西藏雅鲁藏布构造带中段的日喀则蛇绿岩大竹曲岩体中的铬铁矿化进行了研究。通过岩相学和地球化学研究,发现大竹曲地幔橄榄岩中铬尖晶石为不规则它形,且全岩的CaO和Al_2O_3含量与铬尖晶石Cr~#分别呈正相关和负相关关系,这表明地幔橄榄岩中铬尖晶石为地幔部分熔融的残余。然而,纯橄岩和矿石中铬尖晶石显示自形-半自形,并可见橄榄石包裹自形铬尖晶石,且纯橄岩与矿石的CaO和Al_2O_3和Cr~#均无相关性,均说明纯橄岩和铬铁矿石形成于岩石-熔体反应。高Cr~#矿石和纯橄岩的母岩浆性质接近于玻镁安山质熔体,而低Cr~#纯橄岩的母岩浆则类似于MORB,表明大竹曲铬铁矿可能形成于弧后扩张中心。 相似文献
11.
In order to reconstruct tectonic evolution history of the southern margin of Asia (i.e., Lhasa terrane) before the India-Asia collision, here we present a comprehensive study on the clastic rocks in the southern Lhasa terrane with new perspectives from sedimentary geochemistry, detrital zircon geochronology and Hf isotope. Clasts from the Jurassic-Early Cretaceous sedimentary sequences (i.e., Yeba and Chumulong Formations) display high compositional maturity and experienced moderate to high degree of chemical weathering, whereas those from the late Early-Late Cretaceous sequences (Ngamring and Shexing Formations) are characterized by low compositional maturity with insignificant chemical weathering. Our results lead to a coherent scenario for the evolution history of the Lhasa terrane. During the Early-Middle Jurassic (∼192-168Ma), the Lhasa terrane was speculated to be an isolated geological block. The Yeba Formation is best understood as being deposited in a back-arc basin induced by northward subduction of the Neo-Tethys ocean with sediments coming from the interiors of the Lhasa terrane. The Middle Jurassic-Early Cretaceous Lhasa-Qiangtang collision resulted in the formation of a composite foreland basin with southward-flowing rivers carrying clastic materials from the uplifted northern Lhasa and/or Qiangtang terranes. During the late Early-Late Cretaceous (∼104-72Ma), the Gangdese magmatic arc was uplifted rapidly above the sea level, forming turbidites (Ngamring Formation) in the Xigaze forearc basin and fluvial red beds (Shexing Formation) on the retro-arc side. At the end of Late Cretaceous, the Lhasa terrane was likely to have been uplifted to high elevation forming an Andean-type margin resembling the modern South America before the India-Asia collision. 相似文献
12.
The Xigaze forearc basin provides information on subduction evolution and magmatic growth of the Gangdese arc as well as on the India–Asia continental collision. Recently obtained sedimentological, biostratigraphic, petrographic, geochemical and geochronological data on Cretaceous to Paleogene strata in the Cuojiangding area (Zhongba county, south Tibet) shed new light on the tectonic evolution of the southern margin of the Lhasa Block during closure of Neotethys and initial collision with India. The uppermost Cretaceous Padana and Qubeiya formations, deposited in deltaic to inner shelf environments, and representing the final filling of the Xigaze forearc basin, were unconformably overlain by the Quxia and Jialazi formations, deposited in fan-delta environments during the Paleocene/earliest Eocene. Petrographic data and U–Pb ages of detrital zircons document the progressive unroofing of the Gangdese arc, which remained the dominant source of detritus throughout the Late Cretaceous to Paleogene. Detrital Cr-spinels in the Quxia and Jialazi formations are geochemically similar to those in Cretaceous Xigaze forearc strata but different from those hosted in Yarlung Zangbo ophiolites, suggesting that the latter were not exposed to erosion in the considered time window. Sandstone petrography, Cr-spinel-geochemistry, U–Pb age spectra and Hf isotopic ratios of detrital zircons in the Quxia and Jialazi formations match those in Paleogene sediments deposited on the distal (Sangdanlin and Zheya formations) and proximal Indian margin (Enba and Zhaguo formations), suggesting that the Quxia and Jialazi formations documents syncollisional fan-deltas deposited on top of the nascent Himalayan orogenic belt. In this scenario, the onset of the India–Asia collision predates deposition of the Quxia and Jialazi formations and is thus constrained as younger than 66 Ma and older than 58 Ma. 相似文献
13.
Cenozoic conglomerates are exposed discontinuously along the length of the Yarlung Tsangpo suture zone on the southern margin of the Gangdese arc. These conglomerates (the “Gangdese Conglomerates” herein) record a crucial stage in the uplift and erosion histories of the southern Tibet after the initial India–Asia collision. In the Mt. Kailas area, the Gangdese Conglomerates strata consist of multiple sedimentary cycles and each cycle is a fining-upward sequence that was deposited by alluvial fan, braided-river and delta systems. Whereas in the Xigaze area, the Gangdese Conglomerates strata comprise a coarsening-upward sequence that was deposited by delta, braided-river and alluvial fan systems. Based on the detrital and igneous zircon U–Pb ages, the depositional ages of the Gangdese Conglomerates are late Oligocene to early Pliocene (ca. 26–5 Ma) in the Mt. Kailas area, late Oligocene to middle Miocene (ca. 26–15 Ma) in the Xigaze area, and late Oligocene to early Miocene (ca. 26–19 Ma) in the Zedong area. Paleocurrent measurements and provenance data (i.e., conglomerate clast composition, sandstone petrology and detrital zircon age) indicate that the initial detritus of the Gangdese Conglomerates were entirely derived from the north (mainly from the Gangdese arc). Sediment resulting from denudation to the south (the Xigaze forearc basin, the Yarlung Tsangpo suture zone and the northern margin of the Indian plate) first appeared by the early Miocene (ca. 19 Ma) and subsequently increased in abundance gradually. Our new results, together with previous data from the Xigaze area, reveal 3 major stages in the evolution of the Yarlung Tsangpo River system: (1) the southward-flowing stage (ca. 26–19 Ma) featured southward-draining transverse rivers that transported materials from the Gangdese arc southward. Southward paleocurrents in the Gangdese Conglomerates indicate a northern source. (2) The westward-flowing stage (ca. 19–15 Ma) developed due to the uplift of the suture zone and Tethys Himalaya to the south. Northward-draining rivers began to develop, and lakes resembling a string of beads formed and finally connected together, initiating the westward-flowing paleo-Yarlung Tsangpo River. Westward paleoflows were recorded in the Gangdese Conglomerates. (3) The eastward-flowing stage (ca. 15 Ma–present) resulted from differential uplift and denudation of the southern Tibet, which reversed the direction of the young Yarlung Tsangpo River by ca. 15 Ma. The deposition of the Gangdese Conglomerates was controlled by eastward paleoflows. At this point, the modern eastward-flowing Yarlung Tsangpo River system was established. 相似文献
14.
物源分析是古地理重建与盆地分析的关键，典型的物源区包括岩浆弧、大陆地块、再旋回造山带等。重矿物种类多样，蕴含丰富的母岩信息，是物源分析的重要对象。现代砂的研究表明，不同大地构造背景下形成的沉积物具有不同的重矿物组合。遗憾的是，由于古代沉积的重矿物组合在成岩过程中会被改造，现代砂的重矿物组合与物源区的耦合规律并不能直接应用于古代砂岩。科学界尚不清楚岩浆弧与大陆地块来源的古代砂岩的重矿物特征。西藏日喀则弧前盆地与特提斯喜马拉雅侏罗纪—古近纪砂岩物源明确，要么来自亚洲大陆的冈底斯弧，要么来自印度大陆地块，是探讨岩浆弧与大陆地块来源的古代砂岩重矿物特征的绝佳场所。16件砂岩重矿物定量分析结果表明，两个物源区来源的砂岩重矿物组合均被成岩作用严重改造，辉石、角闪石等不稳定矿物消失，绿帘石等自生矿物出现；冈底斯弧来源的砂岩以出现大量绿帘石或磷灰石为特征，ZTR指数小于40；印度大陆地块来源的砂岩以出现大量锆石、电气石和金红石为特征，ZTR指数大于75。这一结果指示岩浆弧与大陆地块来源的砂岩的重矿物组合具有明显差异性，可以用来探讨物源的大地构造背景。 相似文献
15.
在特殊的大地构造位置——西藏日喀则弧前盆地内新发现了彭措林斑岩型铜多金属矿点,从矿点成矿地质背景和地球化学特征推测,该矿点具有中型斑岩型铜多金属矿的找矿远景。与成矿关系密切的花岗闪长斑岩LA-ICP-MS锆石U-Pb法定年结果为(11.04±0.46)Ma,指示该矿点形成时代为晚喜马拉雅期,可能属于冈底斯斑岩铜矿带大规模成矿事件。该矿点的发现扩大了冈底斯斑岩铜矿带南成矿亚带的范围,使斑岩型铜矿今后的找矿空间一直向南扩大到日喀则弧前盆地。 相似文献
16.
Jonathan C. Aitchison Xiaoping Xia Alan T. Baxter Jason R. Ali 《Gondwana Research》2011,20(4):691-709
Age-dating of detrital zircons from 22 samples collected along, and adjacent to, the Yarlung-Tsangpo suture zone, southern Tibet provides distinctive age-spectra that characterize important tectonostratigraphic units. Comparisons with data from Nepal, northern India and the Lhasa and Qiangtang terranes of central Tibet constrain possible sources of sediment, and the history of tectonic interactions.Sedimentary rocks in the Cretaceous–Paleogene Xigaze terrane exhibit strong Mesozoic detrital zircon peaks (120 and 170 Ma) together with considerable older inheritance in conglomeratic units. This forearc basin succession developed in association with a continental volcanic arc hinterland in response to Neotethyan subduction under the southern edge of the Eurasia. Conspicuous sediment/source hinterland mismatches suggest that plate convergence along this continental margin was oblique during the Late Cretaceous. The forearc region may have been translated > 500 km dextrally from an original location nearer to Myanmar.Tethyan Himalayan sediments on the other side of the Yarlung-Tsangpo suture zone reveal similar older inheritance and although Cretaceous sediments formed 1000s of km and across at least one plate boundary from those in the Xigaze terrane they too contain an appreciable mid-Early Cretaceous (123 Ma) component. In this case it is attributed to volcanism associated with Gondwana breakup.Sedimentary overlap assemblages reveal interactions between colliding terranes. Paleocene Liuqu conglomerates contain a cryptic record of Late Jurassic and Cretaceous rock units that appear to have foundered during a Paleocene collision event prior the main India–Asia collision. Detrital zircons as young as 37 Ma from the upper Oligocene post-collisional Gangrinboche conglomerates indicate that subduction-related convergent margin magmatism continued through until at least Middle and probably Late Eocene along the southern margin of Eurasia (Lhasa terrane).Although the ages of detrital zircons in some units appear compatible with more than one potential source with care other geological relationships can be used to further constrain some linkages and eliminate others. The results document various ocean closure and collision events and when combined with other geological information this new dataset permits a more refined understanding of the time–space evolution of the Cenozoic India–Asia collision system. 相似文献
17.
Wang-Chun Xu Hong-Fei Zhang Nigel Harris Liang Guo Fa-Bing Pan 《Gondwana Research》2013,23(2):715-725
The lower Bomi Group of the eastern Himalayan syntaxis comprises a lithological package of sedimentary and igneous rocks that have been metamorphosed to upper amphibolite-facies conditions. The lower Bomi Group is bounded to the south by the Indus–Yarlung Suture and to the north by unmetamorphosed Paleozoic sediments of the Lhasa terrane. We report U–Pb zircon dating, geochemistry and petrography of gneiss, migmatite, mica schist and marble from the lower Bomi Group and explore their geological implications for the tectonic evolution of the eastern Himalaya. Zircons from the lower Bomi Group are composite. The inherited magmatic zircon cores display 206Pb/238U ages from ~ 74 Ma to ~ 41.5 Ma, indicating a probable source from the Gangdese magmatic arc. The metamorphic overgrowth zircons yielded 206Pb/238U ages ranging from ~ 38 Ma to ~ 23 Ma, that overlap the anatexis time (~ 37 Ma) recorded in the leucosome of the migmatites. Our data indicate that the lower Bomi Group do not represent Precambrian basement of the Lhasa terrane. Instead, the lower Bomi Group may represent sedimentary and igneous rocks of the residual forearc basin, similar to the Tsojiangding Group in the Xigaze area, derived from denudation of the hanging wall rocks during the India–Asia continental collision. We propose that following the Indian–Asian collision, the forearc basin was subducted, together with Himalayan lithologies from the Indian continental slab. The minimum age of detrital magmatic zircons from the supracrustal rocks is ~ 41.5 Ma and their metamorphism had happened at ~ 37 Ma. The short time interval (< 5 Ma) suggests that the tectonic processes associated with the eastern Himalayan syntaxis, encompassing uplift and erosion of the Gangdese terrane, followed by deposition, imbrication and subduction of the forearc basin, were extremely rapid during the Late Eocene. 相似文献
18.
CHRONOSTRATIGRAPHY,SEDIMENTATION AND EVOLUTION OF THE XIGAZE FOREARC BASIN: IMPLICATIONS FOR DYNAMIC EVOLUTION OF THE YARLUNG ZANGBO SUTURE ZONE1 All埁ｇｒｅＣＪ,CourtillotV ,TapponnierP ,etal.StructureandevolutionoftheHimalaya Tibetorogenicbelt[J] .Nature,1984 ,30 7:17～ 2 2 .
2 CoulonC ,MaluskiH ,BollingerC ,etal.MesozoicandCenozoicvolcanicrocksfromcentralandsouthernTibet:3 9Ar 40 Ardating ,petrotogicalcharacteristicsandgeodyn… 相似文献