论文部分内容阅读
对阿尔泰山西段不同地区喀纳斯群自然岩石组合、变质变形特征进行初步梳理和研究。认为其整体上表现为变质程度深浅不一的巨厚复理石建造。将喀纳斯群自下而上解体为依列克塔斯组片麻岩-混合岩建造、贝留特组结晶片岩建造、苏木代尔格组浅变质中细粒碎屑岩建造、哲里开特组浅变质细碎屑岩沉积建造。通过对沉积层序的分析研究,认为喀纳斯群古沉积环境为被动大陆边缘相浅海—半深海的陆棚边缘环境,沉积时限应早于古亚洲洋和蒙古湖区洋盆的闭合时间(早奥陶世),时代为震旦纪—早寒武世。
The natural rock assemblages and metamorphic deformation features of Kanas Group in different parts of the western Altai Mountains were systematically studied and studied. Considered the overall performance of varying degrees of metamorphosis depth of the thick flysch built. The Kanas group is disintegrated from bottom to top by the formation of gneiss-gneisses in the Pleistus Formation, the crystallization of schlieren formations in the Beurut Formation and the metamorphism of fine-grained clastic rocks in the Haumundage Formation, Kaitek metamorphic fine clastic sedimentary deposition. Based on the analysis of sedimentary sequence, it is concluded that the Paleo-Sedimentary environment of Kanas is the marginal environment of the continental shelf margin of the passive continental margin with shallow sea-semi-deep sea, and the deposition time should be earlier than the closure time of the oceanic basins in the ancient Asian and Mongolia Ordovician), the era of Sinian - Early Cambrian.