India (Tethyan Himalaya Series) in Central Myanmar: Implications for the Evolution of the Eastern Himalayan Syntaxis and the Sagaing Transform‐Fault System
Abstract In the Katha Range of central Myanmar, lithologic tracers and pressure‐temperature‐deformation‐time data identify Cambro‐Ordovician, Indian‐affinity Tethyan Himalaya Series, located ∼700 km from their easternmost outcrop in S‐Tibet, and ∼450 km from Himalayan rocks in the Eastern Himalayan...
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Wiley
2022-06-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2022GL099140 |
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| author | Myo Min Lothar Ratschbacher Leander Franz Bradley R. Hacker Eva Enkelmann Eko Yoan Toreno Birk Härtel Bernd Schurr Marion Tichomirowa Jörg A. Pfänder |
| author_facet | Myo Min Lothar Ratschbacher Leander Franz Bradley R. Hacker Eva Enkelmann Eko Yoan Toreno Birk Härtel Bernd Schurr Marion Tichomirowa Jörg A. Pfänder |
| author_sort | Myo Min |
| collection | DOAJ |
| description | Abstract In the Katha Range of central Myanmar, lithologic tracers and pressure‐temperature‐deformation‐time data identify Cambro‐Ordovician, Indian‐affinity Tethyan Himalaya Series, located ∼700 km from their easternmost outcrop in S‐Tibet, and ∼450 km from Himalayan rocks in the Eastern Himalayan Syntaxis. Metamorphism began at ∼65 Ma, peaked at ∼45 Ma (∼510°C, 0.93 GPa), and exhumation/cooling (∼25°C/Myr) occurred until ∼30 Ma in a subduction‐early collision tectonic setting. When the Burma microplate—part of the intra‐Tethyan Incertus arc—accreted to SE‐Asia, its eastern boundary, the southern continuation of the Indus‐Yarlung suture (IYS), was reactivated as the Sagaing fault (SF), which propagated northward into Indian rocks. In the Katha rocks, this strike‐slip stage is marked by ∼4°C/Myr exhumation/cooling. Restoring the SF system defines a continental collision‐oceanic subduction transition junction, where the IYS bifurcates into the SF at the eastern edge of the Burma microplate and the Jurassic ophiolite‐Jadeite belts that include the Incertus‐arc suture. |
| format | Article |
| id | doaj-art-4dead921dee241d7bdfdbdc32b4a0ec7 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2022-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-4dead921dee241d7bdfdbdc32b4a0ec72025-01-22T14:38:16ZengWileyGeophysical Research Letters0094-82761944-80072022-06-014912n/an/a10.1029/2022GL099140India (Tethyan Himalaya Series) in Central Myanmar: Implications for the Evolution of the Eastern Himalayan Syntaxis and the Sagaing Transform‐Fault SystemMyo Min0Lothar Ratschbacher1Leander Franz2Bradley R. Hacker3Eva Enkelmann4Eko Yoan Toreno5Birk Härtel6Bernd Schurr7Marion Tichomirowa8Jörg A. Pfänder9Geowissenschaften TU Bergakademie Freiberg Freiberg GermanyGeowissenschaften TU Bergakademie Freiberg Freiberg GermanyMineralogisch‐Petrologisches Institut Universität Basel Basel SwitzerlandGeological Sciences University of California Santa Barbara CA USADepartment of Geosciences University of Calgary Calgary AB CanadaGeowissenschaften TU Bergakademie Freiberg Freiberg GermanyGeowissenschaften TU Bergakademie Freiberg Freiberg GermanyGerman Research Center for Geoscience Potsdam GermanyGeowissenschaften TU Bergakademie Freiberg Freiberg GermanyGeowissenschaften TU Bergakademie Freiberg Freiberg GermanyAbstract In the Katha Range of central Myanmar, lithologic tracers and pressure‐temperature‐deformation‐time data identify Cambro‐Ordovician, Indian‐affinity Tethyan Himalaya Series, located ∼700 km from their easternmost outcrop in S‐Tibet, and ∼450 km from Himalayan rocks in the Eastern Himalayan Syntaxis. Metamorphism began at ∼65 Ma, peaked at ∼45 Ma (∼510°C, 0.93 GPa), and exhumation/cooling (∼25°C/Myr) occurred until ∼30 Ma in a subduction‐early collision tectonic setting. When the Burma microplate—part of the intra‐Tethyan Incertus arc—accreted to SE‐Asia, its eastern boundary, the southern continuation of the Indus‐Yarlung suture (IYS), was reactivated as the Sagaing fault (SF), which propagated northward into Indian rocks. In the Katha rocks, this strike‐slip stage is marked by ∼4°C/Myr exhumation/cooling. Restoring the SF system defines a continental collision‐oceanic subduction transition junction, where the IYS bifurcates into the SF at the eastern edge of the Burma microplate and the Jurassic ophiolite‐Jadeite belts that include the Incertus‐arc suture.https://doi.org/10.1029/2022GL099140 |
| spellingShingle | Myo Min Lothar Ratschbacher Leander Franz Bradley R. Hacker Eva Enkelmann Eko Yoan Toreno Birk Härtel Bernd Schurr Marion Tichomirowa Jörg A. Pfänder India (Tethyan Himalaya Series) in Central Myanmar: Implications for the Evolution of the Eastern Himalayan Syntaxis and the Sagaing Transform‐Fault System Geophysical Research Letters |
| title | India (Tethyan Himalaya Series) in Central Myanmar: Implications for the Evolution of the Eastern Himalayan Syntaxis and the Sagaing Transform‐Fault System |
| title_full | India (Tethyan Himalaya Series) in Central Myanmar: Implications for the Evolution of the Eastern Himalayan Syntaxis and the Sagaing Transform‐Fault System |
| title_fullStr | India (Tethyan Himalaya Series) in Central Myanmar: Implications for the Evolution of the Eastern Himalayan Syntaxis and the Sagaing Transform‐Fault System |
| title_full_unstemmed | India (Tethyan Himalaya Series) in Central Myanmar: Implications for the Evolution of the Eastern Himalayan Syntaxis and the Sagaing Transform‐Fault System |
| title_short | India (Tethyan Himalaya Series) in Central Myanmar: Implications for the Evolution of the Eastern Himalayan Syntaxis and the Sagaing Transform‐Fault System |
| title_sort | india tethyan himalaya series in central myanmar implications for the evolution of the eastern himalayan syntaxis and the sagaing transform fault system |
| url | https://doi.org/10.1029/2022GL099140 |
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