{"title":"中天山东部前寒武纪和古生代剖面的二晶岩（Tilloids）","authors":"A. G. Shevkunov","doi":"10.1134/S0024490225700178","DOIUrl":null,"url":null,"abstract":"<p>The article presents new information on the structure of Upper Precambrian sections in the eastern part of the Middle Tien Shan containing diamictites (tilloids). Identification of two lateral (Dzhetymtau and Akshiyrak) section types in the Vendian Dzhetym Group is substantiated. The Dzhetymtau type is characterized by the presence of rocks containing iron oxide compounds (ferruginous quartzites and hematite schists) in the section. The Akshiyrak type is marked by the presence of black shale layers with pyrite mineralization. At the same time, both types contain two (Dzhetymtau and Baikonur) regional stages (hereafter, horizons) of diamictite development. The paper presents materials indicating that the eastern part of the Middle Tien Shan includes a previously unknown (pre-Dzhetymtau) horizon of diamictite development in the Upper Riphean Boordu sequence, which is compared with the Bayisi Formation at the base of the Kurugtagh Group in northwestern China. In addition, the Kuilu–Sarydzhaz part of the Middle Tien Shan includes the Paleozoic diamictites.</p>","PeriodicalId":18150,"journal":{"name":"Lithology and Mineral Resources","volume":"60 5","pages":"572 - 588"},"PeriodicalIF":0.9000,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Diamictites (Tilloids) in Precambrian and Paleozoic Sections of the Eastern Part of the Middle Tien Shan\",\"authors\":\"A. G. Shevkunov\",\"doi\":\"10.1134/S0024490225700178\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The article presents new information on the structure of Upper Precambrian sections in the eastern part of the Middle Tien Shan containing diamictites (tilloids). Identification of two lateral (Dzhetymtau and Akshiyrak) section types in the Vendian Dzhetym Group is substantiated. The Dzhetymtau type is characterized by the presence of rocks containing iron oxide compounds (ferruginous quartzites and hematite schists) in the section. The Akshiyrak type is marked by the presence of black shale layers with pyrite mineralization. At the same time, both types contain two (Dzhetymtau and Baikonur) regional stages (hereafter, horizons) of diamictite development. The paper presents materials indicating that the eastern part of the Middle Tien Shan includes a previously unknown (pre-Dzhetymtau) horizon of diamictite development in the Upper Riphean Boordu sequence, which is compared with the Bayisi Formation at the base of the Kurugtagh Group in northwestern China. In addition, the Kuilu–Sarydzhaz part of the Middle Tien Shan includes the Paleozoic diamictites.</p>\",\"PeriodicalId\":18150,\"journal\":{\"name\":\"Lithology and Mineral Resources\",\"volume\":\"60 5\",\"pages\":\"572 - 588\"},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2025-09-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Lithology and Mineral Resources\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0024490225700178\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Lithology and Mineral Resources","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1134/S0024490225700178","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
Diamictites (Tilloids) in Precambrian and Paleozoic Sections of the Eastern Part of the Middle Tien Shan
The article presents new information on the structure of Upper Precambrian sections in the eastern part of the Middle Tien Shan containing diamictites (tilloids). Identification of two lateral (Dzhetymtau and Akshiyrak) section types in the Vendian Dzhetym Group is substantiated. The Dzhetymtau type is characterized by the presence of rocks containing iron oxide compounds (ferruginous quartzites and hematite schists) in the section. The Akshiyrak type is marked by the presence of black shale layers with pyrite mineralization. At the same time, both types contain two (Dzhetymtau and Baikonur) regional stages (hereafter, horizons) of diamictite development. The paper presents materials indicating that the eastern part of the Middle Tien Shan includes a previously unknown (pre-Dzhetymtau) horizon of diamictite development in the Upper Riphean Boordu sequence, which is compared with the Bayisi Formation at the base of the Kurugtagh Group in northwestern China. In addition, the Kuilu–Sarydzhaz part of the Middle Tien Shan includes the Paleozoic diamictites.
期刊介绍：
Lithology and Mineral Resources is an international peer reviewed journal that publishes articles on a wide range of problems related to the formation of sedimentary rocks and ores. Special attention is given to comparison of ancient sedimentary rock and ore formation with present-day processes. The major part of the journal is devoted to comparative analysis of sedimentary processes on the continents and in oceans, as well as the genetic aspects of the formation of sedimentary and hydrothermal–sedimentary mineral resources. The journal welcomes manuscripts from all countries in the English or Russian language.
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