A Single Dras‐Kohistan‐Ladakh Arc Revealed by Volcaniclastic Records
نویسندگان
چکیده
Tectonic interpretations of arc remnants in the Himalayan orogen remain uncertain, despite their important implications for overall convergence history between India and Eurasia. Provenance results from deep-water volcaniclastic rocks Indus Suture Zone Ladakh provide new constraints on Mesozoic tectonic evolution Dras Kohistan-Ladakh arcs. Detrital zircon (DZ) U-Pb ages whole-rock geochemistry fault-bounded Upper Cretaceous Nindam Paleocene Jurutze formations present age patterns compositions that are consistent with those arcs, respectively. The combination DZs igneous zircons arcs shows similar distributions support a Late Jurassic to connection all these units. We argue secular trends geochemical composition material magmatic one convergent margin, which shifted primitive mature stage during Cretaceous. recognition single Dras-Kohistan-Ladakh sets reevaluating competing scenarios India–Eurasia system. find most likely scenario is formed above south-dipping intraoceanic subduction zone accreted Eurasia Early Cretaceous, after it evolved north-dipping zone.
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ژورنال
عنوان ژورنال: Geochemistry Geophysics Geosystems
سال: 2022
ISSN: ['1525-2027']
DOI: https://doi.org/10.1029/2021gc010042