Two Stages of Mesozoic Lithogenesis and Mineralization in Daxing'anling Mountains
ZHU Hong-chen,ZHANG Jiong-fei,QUAN Heng (Shenyang Institute of Geology and Mineral Resources, Shenyang110032, China)
From the perspective of lithogenesis and mineralization, two stages of lithogenesis and mineralization in Daxing'anling Mountains have been studied. They were J_(1)-J_(2) and J_(3)-K_(1). The hydrothermal deposits which are mainly copper deposits formed in the early orogenic setting, and those mainly stannum deposits formed in late extending setting. The matter formed rocks and deposits in early stage mainly came from the earth mantle, and that in late stage was mainly from the crustal layer. The host rocks formed in early stage, which belong to calc-alkali series, were acid and neutral hypabyssal ones, and those formed in late stage were acid hypabyssal ones belonging to calc-alkali series.