Title: SHRIMP Zircon Age of the Aermantai Ophiolite in the North Xinjiang Area,China and Its Tectonic Implications
Abstract:We present a new analysis and interpretation of the geological and tectonic history of the Chinese East Junggar orogenic belt together with new, structural observations, geochronological and geochemic...We present a new analysis and interpretation of the geological and tectonic history of the Chinese East Junggar orogenic belt together with new, structural observations, geochronological and geochemical data. The northerly-distributed Armantai ophiolite shows mainly E-MORB and island arc-basalt geochemistry, and a plagiogranite from the ophiolite yields a new SHRIMP zircon age of 503±7 Ma. These juxtaposed tectonic units indicate multiple subduction-accretion systems amalgamated by subsequent oblique convergence, including remnants of island arc, subduction complexes, seamount and ophiolites, forming an enlarged Cordilleran-type margin by Mid-Carboniferous time. This scenario has wide implications for the architecture and crustal growth of Central Asia.Read More
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
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Cited By Count: 78
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