电子微探查化学药品标明日期在分别地,从 Qinling 组在圣 +Ky + Grt 和 Sil + 和 +Grt + 圣的矿物质同等发育不全的二代围住的独居石上被执行。二不同年龄, 520+-23 妈和 435+-9 妈,从这些独居石被获得。这显示 Qinling 组在 EarlyCambrian 期间经历了变态,它可能响应迟了的平底锅非洲人 subduction 生长 tectonothermalevent。
Electron microprobe chemical dating was carried out on monazites enclosed in two generations of mineral paragenesis of St + Ky + Grt and Sil + And + Grt + St, respectively, from the Qinling Group. Two different ages, 520±2.3 Ma and 435±9 Ma were obtained from these monazites. This indicates that the Qinling Group experienced a metamorphism during the Early Cambrian, which is probably in response to the Late Pan-African subduction-accretion tectonothermal event.