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Journal Article

India (Tethyan Himalaya Series) in Central Myanmar: Implications for the Evolution of the Eastern Himalayan Syntaxis and the Sagaing Transform‐Fault System

Authors

Min,  Myo
External Organizations;

Ratschbacher,  Lothar
External Organizations;

Franz,  Leander
External Organizations;

Hacker,  Bradley R.
External Organizations;

Enkelmann,  Eva
External Organizations;

Toreno,  Eko Yoan
External Organizations;

Härtel,  Birk
External Organizations;

/persons/resource/schurr

Schurr,  B.
4.1 Lithosphere Dynamics, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Tichomirowa,  Marion
External Organizations;

Pfänder,  Jörg A.
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5013519.pdf
(Publisher version), 6MB

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Citation

Min, M., Ratschbacher, L., Franz, L., Hacker, B. R., Enkelmann, E., Toreno, E. Y., Härtel, B., Schurr, B., Tichomirowa, M., Pfänder, J. A. (2022): 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, 49, 12, e2022GL099140.
https://doi.org/10.1029/2022GL099140


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5013519
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.