Geochemistry and zircon U-Pb-Hf isotopes of Early Paleozoic arc-related volcanic rocks in Sonid Zuoqi, Inner Mongolia: Implications for the tectonic evolution of the southeastern Central Asian Orogenic Belt
Acid volcanic rocks with age of 439–445 Ma in Sonid Zuoqi were firstly reported.
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They were arc derived from dominant juvenile materials with subordinate ancient crust.
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A continental arc was reconstructed with magmatism from subduction- to collision-related.
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The northward subduction initiated at ~ 500 Ma and terminated before Late Devonian.
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