Characters And Tectonic Setting Of The Late Paleozoic Intrusive Rocks In Northeast Of Kezizetage, RuoQiang, XingJiang

The investigation area is located in the northwest of Kezileta,Sourth BeiShan,XinJiang,which the LuoBuPo is in the west of it.It is located in the valley structure belt of Beishan . In the area ,the bleak structure is growth, The magmatic activity is frequent, The intrusive rock grows,which has the multi-time time, the multi-type characteristic. Intrusive rocks are obviously control by the faulted structure. The directionof it is northeast the east-north .The magmatic intrusion time long from the palaeoproterozoic to the permian, this article studies the intrusive rock mainly for the late carbon period and the permian.1.According to predecessor's material and the Achievement of the1: 50,000 regional geology minerals investigation.In this article I divide the intrusive rock for 3 sequences: Late carboniferous intrusive rock sequence, the Permian Baisiwa gabbro - diorite sequence and the ChangGangZi granodiorite-monzonite grandite2.The zircon U-Pb ages Of monzonite grandite in the area of ChangGangZi is 266.6±6.34Ma and 251±0.6Ma.The U-Pb age of gabbro in the Baidiwa is 274±4MA(Jianchangyi,2006). The U-Pb age of diorite in the east of PingLiangZi is 328.9±0.8MA,and the U-Pb age of granodiorite in the west of PingLiangZi is 301.9Ma. From the Observation in the outside,wo know the major Magmatic activity is in the carboniferous and permian3.According to Maniar and Piccoli(1989) classification, the ChangGangZi granodiorite-monzonite grandite and Late carboniferous intrusive rock sequence are belong to the kind of CAG granites ; According to Chappell and White(1974) , s classification of granite , the ChangGangZi granodiorite-monzonite grandite and Late carboniferous intrusive rock sequence are belong to the I- S granite and I- granite.4.Through to the alkalinity rate and the aluminum index computation, the rocks in this area belongs to the calcium alkalinity series granite class and the aluminum weak saturated type.5. Each sequence rock rare-earth element geochemistry characteristic, all concentrates are rich of light rare earth, with collision granite class rare-earth element curve basic consistent; But the trace element chondrite spider web chart shape is approximately same.6. From the granite class structural environment distinguished in the chart we konw, the formation environment of the rock in this area is similar to the mainland arc, we extrapolate that is fomation in the carbon period edge activity region of rift valley, It is relation withThe Hua Lixi rift valley gradualness extrusion closed correlation.It forms the environment is possibly the palaeoproterozoic to the permian world extrusion closed process.