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The volcanic rock slab in Wuliba consists of subalkaline tholeiitic basalts and calc-alkaline dacitic rhyolites. The rocks belong to bimodal volcanic rocks, remarkably depleted in Nb and Ta. Their occurrence and geochemical characteristics suggest that as a result of an ancient oceanic crust subduction, they were formed in a rift valley in an ocean island arc. The Wuliba volcanic rock slab is important evidence that the Mianlue suture zone had extended to the Bashan arcuate area.
The volcanic rock slab in Wuliba consists of subalkaline tholeiitic basalts and calc-alkaline dacitic rhyolites. The rocks belong to bimodal volcanic rocks, remarkably depleted in Nb and Ta. Their occurrence and geochemical characteristics suggest that as a result of an ancient oceanic crust subduction, they were formed in a rift valley in an ocean island arc. The Wuliba volcanic rock slab is important evidence that the Mianlue suture zone had extended to the Bashan arcuate area.