Evidence of spinel fades partial melting of the mantle rocks from the CCSD-PP3 drilling cores
中国大陆科学钻探CCSD-PP3钻孔地幔岩的尖晶石相部分熔融证据

The mantle rocks from the CCSD PP3 drilling cores in the Sulu UHPM belt are characterized by high contents of Mg and low A1 and Ca,suggesting a much highly depleted mantle rocks than those in the east of China.Geochemical,mineralogical and Re-Os isotope data indicate that the mantle rocks in PP3 were originated from early Proterozoic lithospheric mantle and partial melted at shallow depth under spinel facies during medium-late Proterozoic time.The spinel facies peridotites were transformed into garnet facies peridotites,due to the deep subduction during the collision between the Yangtze and the North China blocks.