دورية أكاديمية
Limited underthrusting of India below Tibet: 3 He/ 4 He analysis of thermal springs locates the mantle suture in continental collision.
| العنوان: | Limited underthrusting of India below Tibet: 3 He/ 4 He analysis of thermal springs locates the mantle suture in continental collision. |
|---|---|
| المؤلفون: | Klemperer SL; Department of Geophysics, Stanford University, Stanford, CA 94305., Zhao P; Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China., Whyte CJ; School of Earth Sciences, The Ohio State University, Columbus, OH 43210., Darrah TH; School of Earth Sciences, The Ohio State University, Columbus, OH 43210., Crossey LJ; Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131., Karlstrom KE; Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131., Liu T; Department of Geophysics, Stanford University, Stanford, CA 94305.; Scripps Institution of Oceanography, La Jolla, CA 92093., Winn C; Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131., Hilton DR; Scripps Institution of Oceanography, La Jolla, CA 92093., Ding L; Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China. |
| المصدر: | Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2022 Mar 22; Vol. 119 (12), pp. e2113877119. Date of Electronic Publication: 2022 Mar 18. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: National Academy of Sciences Country of Publication: United States NLM ID: 7505876 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1091-6490 (Electronic) Linking ISSN: 00278424 NLM ISO Abbreviation: Proc Natl Acad Sci U S A Subsets: PubMed not MEDLINE; MEDLINE |
| أسماء مطبوعة: | Original Publication: Washington, DC : National Academy of Sciences |
| مستخلص: | During continent–continent collision, does the downgoing continental plate underplate far inboard of the collisional boundary or does it subduct steeply into the mantle, and how is this geometry manifested in the mantle flow field? We test conflicting models for these questions for Earth’s archetypal continental collision forming the Himalaya and Tibetan Plateau. Air-corrected helium isotope data (3He/4He) from 225 geothermal springs (196 from our group, 29 from the literature) delineate a boundary separating a Himalayan domain of only crustal helium from a Tibetan domain with significant mantle helium. This 1,000-km-long boundary is located close to the Yarlung-Zangbo Suture (YZS) in southern Tibet from 80 to 92°E and is interpreted to overlie the “mantle suture” where cold underplated Indian lithosphere is juxtaposed at >80 km depth against a sub-Tibetan incipiently molten asthenospheric mantle wedge. In southeastern Tibet, the mantle suture lies 100 km south of the YZS, implying delamination of the mantle lithosphere from the Indian crust. This helium-isotopic boundary helps resolve multiple, mutually conflicting seismological interpretations. Our synthesis of the combined data locates the northern limit of Indian underplating beneath Tibet, where the Indian plate bends to steeper dips or breaks off beneath a (likely thin) asthenospheric wedge below Tibetan crust, thereby defining limited underthrusting for the Tibetan continental collision. |
| References: | Proc Natl Acad Sci U S A. 2014 Sep 30;111(39):14076-81. (PMID: 25225410) Nat Commun. 2016 Jun 16;7:11888. (PMID: 27307135) Science. 2007 Nov 30;318(5855):1433-6. (PMID: 18048684) Proc Natl Acad Sci U S A. 2016 Nov 29;113(48):13636-13641. (PMID: 27849603) Ground Water. 2018 Mar;56(2):225-244. (PMID: 29409144) Nat Commun. 2021 Jul 6;12(1):4157. (PMID: 34230487) Nature. 2015 Aug 13;524(7564):212-5. (PMID: 26268192) Ground Water. 2018 Mar;56(2):204-224. (PMID: 29409148) Science. 2007 Nov 30;318(5855):1389-90. (PMID: 18048671) Science. 2009 Sep 11;325(5946):1371-4. (PMID: 19745147) Nat Commun. 2018 Sep 17;9(1):3780. (PMID: 30224766) Nature. 2011 Apr 7;472(7341):79-81. (PMID: 21475198) Nat Commun. 2017 Jun 06;8:15659. (PMID: 28585571) |
| فهرسة مساهمة: | Keywords: Indian lithosphere; Tibetan plateau; continental collision; mantle helium; structural seismology |
| تواريخ الأحداث: | Date Created: 20220318 Date Completed: 20220420 Latest Revision: 20220716 |
| رمز التحديث: | 20231215 |
| مُعرف محوري في PubMed: | PMC8944758 |
| DOI: | 10.1073/pnas.2113877119 |
| PMID: | 35302884 |
| قاعدة البيانات: | MEDLINE |
| تدمد: | 1091-6490 |
|---|---|
| DOI: | 10.1073/pnas.2113877119 |