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西天山伊宁地块主褶皱幕鄯善运动的确立及地质意义

ISSN号：1001-8166
期刊名称：《地球科学进展》
时间：0
分类：P542[天文地球—构造地质学;天文地球—地质学] P618.510.2[天文地球—矿床学;天文地球—地质学]
作者机构：[1]长安大学地球科学与资源学院,陕西西安710054, [2]新疆维吾尔族自治区地质矿产勘查开发局第九地质大队,新疆乌鲁木齐830000
相关基金：国家自然科学基金项目“小岩体镍铜铂族岩浆硫化物矿床成矿的深部过程”（编号：40534020）;维吾尔自治区地质矿产调查项目“新疆巩留特克斯达坂一带1：5万地域地质矿产调查”（编号：XJQDZ2004-12）资助.

关键词：主褶皱幕, 鄯善运动, 地质意义, 伊宁地块, 西天山, Major fold episode, Shanshan movement, Geological significance, Yining massif, Western Tianshan.

中文摘要：

地层不整合接触是研究地质发展历史及鉴定地壳运动特征和运动时期的重要依据，主褶皱幕是一造山带多幕构造运动中起决定性作用和最为重要的一次构造运动。天山的构造运动幕次多且因地而异，前人认识多有分歧，也没有确立主褶皱幕。伊宁地块伊什基里克山一带上、下石炭统之间为角度不整合接触关系，在岩石组合、沉积环境、古生物地理区系、构造样式、区域大地构造背景等方面差异最为显著，凸显了鄯善运动对区内构造格架和盆山演化起到决定性的作用，因而是主褶皱幕。鄯善运动记录了西天山沟一弧一盆格局消亡，天山残余小洋盆终结，塔里木板块和准噶尔板块最终拼合在一起，形成了统一大陆的重要演化信息。

英文摘要：

The unconformity contact of stratum is an important basis in the study of geologic history and the judge of the characters and the date of crustal movement. The major fold episode is one of the decisive role played and the most important tectonic movement in orogenic belt. The fold episode is different in Tianshan areas with different understanding by scientists. As a result, the major fold episode is not established in this area. This is the angle-unconformity contact of stratum between the early and later Carboniferous in the Yishijilike area, Western Tian- shan Mountains. They are obviously different by rock assemblage, depositional environment, geographical area of paleontology, tectonic style, regional tectonic setting, etc. The tectonic framework, basin-mountain evolution have played a decisive role by Shanshan movement, which is the major fold episode. Shanshan movement records the important evolutional information of the died-out of the trench-island arc-basin system, the end of Tianshan residual small ocean basin, and the Tarim plate and Junggar plate combining together to form a unified continent

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