Northeastern Indian origin of the Lhasa terrane

IF 7.2 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Gondwana Research Pub Date : 2025-07-05 DOI:10.1016/j.gr.2025.06.010

Guang-Xu Wang , Ren-Bin Zhan , Jisuo Jin , Zhong-Yang Chen , Ian G. Percival , Xin Wei , Yan Liang , Yu-Nong Cui , Yong Wang , Ya-Tao Zhang

{"title":"Northeastern Indian origin of the Lhasa terrane","authors":"Guang-Xu Wang , Ren-Bin Zhan , Jisuo Jin , Zhong-Yang Chen , Ian G. Percival , Xin Wei , Yan Liang , Yu-Nong Cui , Yong Wang , Ya-Tao Zhang","doi":"10.1016/j.gr.2025.06.010","DOIUrl":null,"url":null,"abstract":"<div><div>The Lhasa terrane, once part of Gondwana until the Permian/Triassic, rifted away and accreted to Eurasia, forming a core part of the Tibetan Plateau. Pinpointing its palaeogeographical position is essential for understanding both the reconstruction of Gondwana and the plateau’s evolution. However, considerable controversy persists over its exact position before separation, with geochemical and isotopic data suggesting ties to Australian, Indian or African sections of eastern Gondwana. Here, we use newly acquired, palaeobiogeographically sensitive fossils from the Baingoin area of central Tibet to determine the terrane’s affinities. This late Darriwilian–Sandbian (Middle–Late Ordovician, ca. 457–453 Ma) biota lay along a palaeolatitudinally differentiated biotic gradient, indicative of a distinctly closer palaeobiogeographical affinity to northeastern India than to Australia or Africa. This finding, confirmed by a critical review of existing fossil and geochemical data, strongly supports a northeastern Indian origin of the Lhasa terrane.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"147 ","pages":"Pages 184-191"},"PeriodicalIF":7.2000,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Gondwana Research","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1342937X25002059","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The Lhasa terrane, once part of Gondwana until the Permian/Triassic, rifted away and accreted to Eurasia, forming a core part of the Tibetan Plateau. Pinpointing its palaeogeographical position is essential for understanding both the reconstruction of Gondwana and the plateau’s evolution. However, considerable controversy persists over its exact position before separation, with geochemical and isotopic data suggesting ties to Australian, Indian or African sections of eastern Gondwana. Here, we use newly acquired, palaeobiogeographically sensitive fossils from the Baingoin area of central Tibet to determine the terrane’s affinities. This late Darriwilian–Sandbian (Middle–Late Ordovician, ca. 457–453 Ma) biota lay along a palaeolatitudinally differentiated biotic gradient, indicative of a distinctly closer palaeobiogeographical affinity to northeastern India than to Australia or Africa. This finding, confirmed by a critical review of existing fossil and geochemical data, strongly supports a northeastern Indian origin of the Lhasa terrane.

Abstract Image

查看原文本刊更多论文

拉萨地的印度东北部起源

拉萨地体在二叠纪/三叠纪之前曾是冈瓦纳的一部分，后来断裂并增生到欧亚大陆，形成了青藏高原的核心部分。精确定位其古地理位置对于理解冈瓦纳的重建和高原的演化都是至关重要的。然而，它在分离前的确切位置仍存在相当大的争议，地球化学和同位素数据表明，它与冈瓦纳东部的澳大利亚、印度或非洲部分有关。在此，我们利用西藏中部班固地区新获得的古生物地理敏感化石来确定地体的亲缘关系。这一晚darriwlian - sandbian（中晚奥陶世，约457-453 Ma）生物群沿着古纬度分化的生物梯度分布，表明其与印度东北部的古地理亲缘关系明显更近，而不是与澳大利亚或非洲的亲缘关系。这一发现得到了对现有化石和地球化学数据的严格审查的证实，有力地支持了拉萨地体起源于印度东北部。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Gondwana Research 地学-地球科学综合

CiteScore

12.90

自引率

6.60%

发文量

298

审稿时长

65 days

期刊介绍： Gondwana Research (GR) is an International Journal aimed to promote high quality research publications on all topics related to solid Earth, particularly with reference to the origin and evolution of continents, continental assemblies and their resources. GR is an "all earth science" journal with no restrictions on geological time, terrane or theme and covers a wide spectrum of topics in geosciences such as geology, geomorphology, palaeontology, structure, petrology, geochemistry, stable isotopes, geochronology, economic geology, exploration geology, engineering geology, geophysics, and environmental geology among other themes, and provides an appropriate forum to integrate studies from different disciplines and different terrains. In addition to regular articles and thematic issues, the journal invites high profile state-of-the-art reviews on thrust area topics for its column, ''GR FOCUS''. Focus articles include short biographies and photographs of the authors. Short articles (within ten printed pages) for rapid publication reporting important discoveries or innovative models of global interest will be considered under the category ''GR LETTERS''.