The Zhaheba-Aermantai ophiolite of eastern Junggar, Xinjiang Province, is considerate as Early Paleozoic fossil oceanic lithospheric slab. It is composed of mantle peridotite, gabbro, basalt and chert. Based on the field investigation, the Zhaheba-Aermantai ophiolite is intruded by late magmatic rocks such as diorite porphyry. According to the LA-ICP-MS dating, U-Pb zircon age of gabbro is 497.3 ± 4.5 Ma and the age of intruding diorite porphyry is 424.5 ± 3.1 Ma. These diorite porphyry are indicated that they are of island arc geochemistry affinity. Combined with regional geology of Zhaheba-Aermantai area, the later intrusion of diorite porphyry are magmatism of island arc evolution followed ophiolite formation. It gives light on the multistage evolution of ophiolite origin in Zhaheba-Aermantai area.
Luo Jun Xiao Wenjiao He Zhiliang Yun Jinbiao Liu Quanyou Li Tianyi. Multistage evolution of Zhaheba-Aermantai ophiolite in eastern Junngar: Evidence from zircon U-Pb geochronology[J]. Chinese Journal of Geology, 2017, 52(4): 1120-1139.