地质学报(英文版)
地質學報(英文版)
지질학보(영문판)
ACTA GEOLOGICA SINICA
2002年
1期
118-125
,共8页
吴才来%Jone WOODEN%YANG Jingsui%Trevor IRELAND%LIOU June Guang%Wan Yusheng%Shi Rendeng
吳纔來%Jone WOODEN%YANG Jingsui%Trevor IRELAND%LIOU June Guang%Wan Yusheng%Shi Rendeng
오재래%Jone WOODEN%YANG Jingsui%Trevor IRELAND%LIOU June Guang%Wan Yusheng%Shi Rendeng
zircon SHRIMP age%Aolaoshan granite%ultrahigh-pressure metamorphic belt%south margin of the Qilian Mts
Zircon SHRIMP ages of the Aolaoshan granite on the south margin of the Qilian Mts. Range from 445?15.3 to 496?7.6 Ma (averaging 473 Ma), belonging to the Early Ordovician. Geochemically, the granite is similar to I-type granite and, tectonically, was formed in an island-arc environment based on relevant diagrams for structural discriminations. Considering also the regional geology, the authors suggest that the granite is part of an ultrahigh-pressure belt on the south margin of the Qilian Mts. And that its formation bears a close relationship to this belt.
