The Xixiang Group in the southern Qinling has been believed to be a Precambrian metamorphic complex. Radiolarian fossils were found in the muddy chert interlayers of volcanic rocks in the Sunjiahe Formation of the gro...The Xixiang Group in the southern Qinling has been believed to be a Precambrian metamorphic complex. Radiolarian fossils were found in the muddy chert interlayers of volcanic rocks in the Sunjiahe Formation of the group. The ages of the fossils are Late Devonian and Early Carboniferous in the lower member and Early Carboniferous in the middle and upper members of the formation. The complex in the Xixiang area can be determined as a Paleozoic-Triassic melange which connects with the Mianxian-Lueyang ophiolitic melange.展开更多
基金Project supported by the fundations of the Chinese Academy of Sciences and Ministry of Geology and Mineral Resources (MGMR) for 100 outstanding young scientists.
文摘The Xixiang Group in the southern Qinling has been believed to be a Precambrian metamorphic complex. Radiolarian fossils were found in the muddy chert interlayers of volcanic rocks in the Sunjiahe Formation of the group. The ages of the fossils are Late Devonian and Early Carboniferous in the lower member and Early Carboniferous in the middle and upper members of the formation. The complex in the Xixiang area can be determined as a Paleozoic-Triassic melange which connects with the Mianxian-Lueyang ophiolitic melange.
