【摘要】 阿尔泰造山带发育了一系列低压红柱石型与中压蓝晶石型变质带.红柱石型变质带发育了黑云母带、石榴石带、十字石带、十字石-红;柱石带、矽线石带、矽线石-堇青石带;蓝晶石型发育了黑云母带、石榴石带、十字石带、蓝晶石带、矽线石带.中压的蓝晶石序列估算温度为445~747.6 ℃,压力为0.64~0.95 GPa,中压序列随变质作用增加,压力有增高趋势;低压的红柱石序列温度445~681 ℃,压力0.3~0.8 GPa,自十字石带后,压力明显降低,可能是靠近热源而导致早期中压痕迹消失,因此红柱石型变质带不是一个正常的变质演化系列.蓝晶石型变质早于红柱石型变质,蓝晶石型变质序列可能与晚古生代弧-陆碰撞事件有关,红柱石序列的形成可能与碰撞相关的广泛花岗岩体侵入及中压岩石抬升有关.更多还原

【Abstract】 There are low-pressure andalusite sequence metamorphic belt and medium-pressure kyanite sequence metamorphic belt occurring in Altaides. The andalusite sequence metamorphic belt includes biotite zone, garnet zone, staurolite zone, staurolite-andalusite zone, sillimanite zone and sillimanite-cordierite zone. The kyanite sequence metamorphic belt includes biotite zone, garnet zone, staurolite zone, kyanite zone, sillimanite zone. It is calculated that the P-T conditions are 445~747.66 ℃ and 0.64~0.95 GPa for Kyanite sequence and 445~681 ℃ and 0.3~0.8 GPa for andalusite sequence. The andalusite sequence isn抰 a normal evolution progeny of metamorphism. The forming of kyanite sequence was probably related to an arc-continent collision event during the late Paleozoic, and the andalusite sequence may be produced by uplifting of the medium-pressure rocks and extensive intrusions of the collision-related granites.更多还原