Abstract

In the Dzhetym Range, there are well-known Precambrian massifs of marbled limestones and quartzites, which have no analogues throughout the Middle Tien Shan. The authors establish that the quartzite-carbonate stratum occupies the highest structural position in the series of nappes of the region. The U–Pb dating of detrital zircon and zircon from intrusions reliably proves the Riphean age of the quartzite-carbonate stratum, which grounds to compare it with the autochthonous complex of the Karatau–Talas terrane. The autochthonous and parautochthonous units of the Dzhetym Range are composed of Riphean–Vendian sediments of the Middle Tien Shan. The geochemical characteristics and the refined age of the Bolshoi Naryn volcanic-plutonic complex, obtained in the course of this study, indicate that in the Late Riphean this area was a segment of the periocean continental rift, manifested in the time interval of 750–700 Ma ago throughout the entire Tarim–Tien Shan–Kazakhstan region.

中文翻译：

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天山中部构造背景塔拉斯剖面的碳酸盐岩地层

摘要

在Dzhetym山脉中，有著名的前寒武纪地块大理石化的石灰岩和石英岩，在整个中天山都没有类似物。作者证实，在该地区一系列的尿布中，石英岩-碳酸盐岩层占据了最高的结构位置。碎屑锆石和侵入岩中锆石的U–Pb测年可靠地证明了石英岩-碳酸盐岩层的里菲斯时代，这有理由将其与Karatau–Talas土层的自生复合体进行比较。Dzhetym山脉的自发和旁生单位由中天山的里菲安-文迪安沉积物组成。在这项研究过程中获得的Bolshoi Naryn火山-深层复合体的地球化学特征和精炼年龄，