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北阿尔金巴什考供-斯米尔布拉克杂岩体位于巴什考供盆地北缘,呈东西向展布,宽约2～6km,长约30km,出露面积约140km2.主要由灰黑色石英闪长岩、灰白色花岗岩、粉红色花岗岩和花岗伟晶岩组成.围岩为前寒武系片岩、变质泥岩及变质凝灰岩.岩石地球化学特征表明,石英闪长岩属钙碱性系列,具有Ⅰ型花岗岩的属性;而粉红色和灰白色花岗岩属高钾钙碱性系列,具有S型花岗岩的属性.锆石SHRIMP定年结果表明,石英闪长岩的年龄为(481.6±5.6)Ma,而灰白色花岗岩和粉红色花岗岩的年龄在误差范围内基本一致,分别为(437.0±3.0)～(433.1±3.4)Ma和(443±11)～(434.6±1.6)Ma.结合区域地质特征,认为石英闪长岩可能形成于洋壳俯冲环境,而灰白色和粉红色花岗岩可能形成于碰撞后环境.
The northern Alkhabashish-to-Smirbock complex is located in the northern margin of the Bashkho supply basin and extends east-west with a width of 2 to 6 km, a length of 30 km and an exposed area of about 140 km 2. Quartz diorite, gray granite, pink granite and granitic pegmatite.The surrounding rock is Precambrian schist, metamorphic mudstone and metamorphic tuff.The petrogeochemical characteristics of rock indicate that quartz diorite is a series of calc-alkaline, With the characteristics of Type I granite. The pink and off-white granites belong to the high-K calc-alkaline series and have the properties of S-type granites. The zircon SHRIMP dating results show that the age of quartz diorites is (481.6 ± 5.6) Ma The age of the gray-white granite and the pink granite are basically the same in the error range, which are (437.0 ± 3.0) ~ (433.1 ± 3.4) Ma and (443 ± 11) ~ (434.6 ± 1.6) Ma, respectively. Combined with the regional geological characteristics, Diorites may form in subducted oceanic crust, while off-white and pink granites may form in the post-collision environment.