Xinjiang Gongliu - Turks Daban Ku Lesa According Along The Granitoids

Kulesayi is lacated in the mountains between Gongliu and Tekesi in Yili, Sinkiang province. The granitoids in this area appear as a batholith. In the past, people who researched the granitoids in this area categorized the granitoids into several petrographical facies on the base of petrography. Instead of disintegration of the granitoids, they regarded the granitoids as a whole. They did not do deep research in genesis and tectonic setting of the granitoids in this area. For one thing, there is lack of chemistry data and samples of isotopic age. For another thing, the few isotopic data which are tested by the old research methods are incredible. The study about the connection of the granitoids and major magma events is very little, so are assemblage of igneous rocks, genesis and geotectonic evolution. The big progress is not made in ore-forming.According to the investigation of petrological characters, petrochemical characters, geochemical characters, the intrusive time of the granitoids in this area, and the backgrounds of ore-forming and tectonic, some new results are made as follows:1. Using theories of rock lineage, the granitoids in this area are disintegrated into two succession, the Kulesayi succession in the early Carboniferous period and the Qinaersayi succession in the early Permian period. Both invaded into the Dahalajunshan formation in the early Carboniferous period. The relation of the two succession is pulsation, and the Qinaersayi succession invaded of the Kulesayi succession.2. The instrusive time of the Kulesayi succession in the early Carboniferous period is 330～320Ma, and main rock types are the quartz dioritized-porphyrite and the granodioritized-porphyry. The former is earlier than the latter.3. The instrusive time of the Qinaersayi succession in the early Permian period is 292～290Ma, and main rock types are the granodiorite, the adamellite and the syenogranite. In lithology, from old to new, the order is granodioriteâ†'adamelliteâ†'syenogranite. In grain size, fine-grained rocks is earlier than coarse grained rocks.4. The Kulesayi succession in the early Carboniferous period, which belongs to the calc-alkalic rock type, are formed in the environment of volcanic arc (VAG) , comparable with the Dahalajunshan formation in the early Carboniferous period(C₁d²) . It belongs to the mixed genesis. The Qinaersayi succession in the early Permian period, which belongs to the alkalic rock type, are formed in the intraplate environment (WPG) , comparable with the Wulang formation in the early Permian period (P₁w) . It belongs to the crustal genesis.5. It is possible for magma to provide some parts of metallogenic materials in ore-forming process, primarily with heat. The access that magma goes through maybe tectonic zones.