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ORIGIN OF ECLOGITES FROM THE DABIE MOUNTAINS: EVIDENCE FROM PROTOLITH

Liu Xiaochun(Changchun University of Earth Science)  
The occurrence, petrochemistry, REE and Sr isotope geochemistry indicate that the pro- tolith of eclogites from the Dabie Mountains are either gabbros formed during continental extension or bedded continental tholeiites corresponding to Late Archean supercrustal rocks, only a minority of eclog- ites which are associated with marbles and calcic gneisses is derived from lime mudrocks. As a part of subducted continental slab, those rocks underwent in situ high-pressure metamorphism and transformed into eclogites during the collision of the Yangtze plate and the North China Plate.
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