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Petrogenesis and Dating of Two Types of Granite from North Qilian, China
Author(s) -
Cailai WU,
Rendeng SHI,
Jingsui YANG,
Hongyi YANG,
WOODEN Joseph L.,
Qiuguang ZHENG,
Shengyong CHENG
Publication year - 2005
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.2005.tb00881.x
Subject(s) - zircon , geology , biotite , petrogenesis , geochemistry , paleozoic , shrimp , hornblende , granitic rock , paleontology , basalt , quartz , fishery , biology
Two types of granitic intrusives occur in the lower Paleozoic strata in north Qilian. One is the hornblende‐bearing granitic body in Jingzichuan, characterized by the REE total of 90×10 −6 106×10 −6 , LREE/HREE ratio of less than 8 (ranging from 6.9 to 7.8) and zircon SHRIMP age of 464 Ma. These intrusives have island‐arc affinity. The other is biotite‐bearing granitic body in Huangyanghe with the REE total of 214×10 −6 250×10 −6 , LREE/HREE ratio of more than 8 (ranging from 8.2 to 9.7) and zircon LA‐ICP‐MS age of 383 Ma. They were tectonically intruded in a post‐coilisional or within‐plate environment.