【摘要】 本文对黑龙江依兰地区团山子一带黑龙江杂岩中的含石榴石白云母钠长片岩开展了详细的岩相学、矿物化学和年代学分析及相平衡模拟研究，确立该泥质片岩经历了2个变质演化阶段：(1)峰期阶段M1,代表性矿物组合为gt+czo+amph+phn+ru,温压条件为510～570℃和1.06～1.42GPa;(2)退变质阶段M2,其矿物组合为gt+ab+czo+act+chl+phn+sph,经历了330～470℃/0.6～0.95GPa降温降压过程。同时对含石榴石白云母钠长片岩中的锆石和榍石开展了U-Pb同位素定年：碎屑锆石给出最年轻的谐和年龄为～197Ma,而近峰期形成的变质榍石年龄为177Ma左右，因此我们限定出依兰地区变沉积岩的原岩时代为早-中侏罗世，高压变质时代为中侏罗世。结合前人关于黑龙江杂岩的研究，我们认为牡丹江洋至少在早二叠世就已经打开，晚三叠世之后在弧前盆地逐渐堆积来自相邻两个地体的沉积物源，随后在牡丹江洋和古太平洋板块西向俯冲的共同作用下，于中侏罗世经历角闪岩相峰期变质，最终在早白垩世佳木斯地块和松嫩地体发生碰撞拼贴。更多还原

【Abstract】 Detailed petrographic, mineral chemical, geochronological analyses and phase equilibrium modeling were conducted on garnet-bearing muscovite albite schists from the Heilongjiang Complex in the Tuanshanzi area of the Yilan area, Heilongjiang Province. Two metamorphic stages for these pelitic schists are identified:(1) peak metamorphic stage M1, represented by the assemblage of gt+czo+amph+phn+ru, with temperature and pressure conditions of 510～570℃ and 1.06～1.42GPa;(2) retrograde metamorphic stage M2, defined by the mineral assemblage of gt+ab+czo+act+chl+phn+sph, undergoing a cooling and decompressing process at 330～470℃/0.6～0.95GPa. U-Pb isotopic dating was performed on zircons and titanites from the garnet-bearing muscovite albite schists. The youngest concordant ages of detrital zircons are approximately ～197Ma, whereas the metamorphic titanites, formed near the peak metamorphic stage, yield ages of ～177Ma. Therefore, we determine that the protolith of the metamorphosed sedimentary rocks in the Yilan area formed in the Early-Middle Jurassic, with the high-pressure metamorphism occurring in the Middle Jurassic. Combined with previous studies on the Heilongjiang Complex, we suggest that the Mudanjiang Ocean had existed at least in the Early Permian. After the Late Triassic, sediments derived from adjacent terranes progressively accumulated in the forearc basin. The subsequent westward subduction of both the Mudanjiang Oceanic plate and the Paleo-Pacific Plate led to peak amphibolite-facies metamorphism during the Middle Jurassic. Finally, the Jiamusi Block and the Songnen Block experienced collision and accretion in the Early Cretaceous.更多还原