Extensional mountain building along convergent plate boundary: Insights from the active Taiwan mountain belt
نویسندگان
چکیده
Abstract Late brittle extension is a common feature in orogenic belts, and its role mountain building processes still the subject of debate. Its timing relationship with crustal thickening, topography, basin infill, rock exhumation are key importance determining whether it major factor development or merely causes near-surface secondary effects. We examined this question relation to active arc-continent collision Taiwan, studying structural evolution by integrating new critical geochronological results for tensile vein filling hinterland metamorphic terrane syn-collision deposition records. Acceleration molasse was found be coeval initiation structures at ca. 1.6 Ma, which long overdue as continental subduction started well before 6.5 Ma central northern Taiwan. The topographic Taiwan thus constructed when upper crust thickened prism turned extensional, orographic elevation relief prerequisites molasses production. Syn-collisional therefore proposed possible facilitator both augmented extrusive formation orography.
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ژورنال
عنوان ژورنال: Geology
سال: 2022
ISSN: ['0091-7613', '1943-2682']
DOI: https://doi.org/10.1130/g50311.1