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新疆库鲁克塔格南部阔克苏地区出露较多的斜长角闪岩类 .这些岩石呈包体状产于花岗闪长质片麻岩中 .地球化学研究表明 ,这类斜长角闪岩为正斜长角闪岩 ,原岩为弱碱性玄武岩类 .斜长角闪岩的Nd模式年龄多数为 2 832～ 30 75Ma ,而其全岩Sm_Nd同位素等时线年龄为 ( 82 8± 86 )Ma ,INd=0 .5 1 0 981± 0 .0 0 0 82 ,εNd(T) =- 1 1 .5± 1 .6 .这表明本区可能存在太古宙的镁铁质地壳 ,大约 82 0Ma构造_热事件 ,而使得本区的变质杂岩Sm_Nd同位素发生了均一化 .这一事件可能与广泛的塔里木运动有关 .
There are more amphibolites exposed in the Cakesque area of southern Kuluktag, Xinjiang.These rocks are in the form of inclusions in granodiorite gneisses.Geochemistry studies show that these kinds of plagioclase The amphibolite is orthophosphoric amphibolite, and the original rocks are weakly alkaline basalts.The Nd model ages of amphibolite range from 2 832 to 30 75Ma, and the Sm_Nd isotopic isochron ages of whole rocks are (82 8 ± 86 Ma, INd = 0.51 0 981 ± 0 .0 0 0 82, εNd (T) = -1.1.5 ± 1 .6 This suggests that Archean mafic crust may exist in this area , About 82 ° Ma tectonic _ thermal events, which makes the Sm_Nd isotopes of metamorphic complexes in this area are homogenized.This event may be related to a wide range of Tarim movement.