摘要
笔者通过岩性组合与岩相组合对比研究、SHRIMP锆石U−Pb测年与化石年代学研究等手段,认为东准噶尔奥依托浪格地区原三塘湖组陆相火山岩应重新厘定为巴塔玛依内山组,并建议将这套准噶尔盆地东北缘广泛分布的陆相火山岩根据地质时代解体为巴塔玛依内山组与三塘湖组,三塘湖组仅代表早二叠纪陆相火山岩。年代学研究表明:奥依托浪格地区巴塔玛依内山组年龄具有穿时性,下段年龄为(335.6±6.5)Ma,上段年龄为(320.5±7.1)Ma,属早石炭世晚期到晚石炭世,解决了巴塔玛依内山组长久以来的下、上石炭统之争。综合研究认为:这套陆相火山岩属于东准噶尔构造带自西向东链式缝合背景下的构造−岩浆活动,残余洋盆消失至陆相火山活动开启,同时受到西侧拉张环境与东侧岛弧环境的影响。奥依托浪格地区巴塔玛依内山组火山机构、构造、喷发间歇期发育,具有石油地质意义。
In this paper,the authors studied the comparison between lithologic assemblage and lithofacies assemblage SHIRIMP zircon U-Pb dating results and fossil chronology,and believed that the continental volcanic rocks of the former Santanghu Formation in Oetonggar area of Eastern Junggar Basin should be redefined as the Batamayineishan Formation.It is suggested that the widely distributed continental volcanic rocks at the northeast edge of Junggar Basin should be decomposed into the Batamayineishan Formation and the Santanghu Formation according to the geological age.The Santanghu Formation only represents the early Permian continental volcanic rocks.The study of chronology shows that the age of the Batamayineishan Formation in Oetolanagar is time-penetrating.The age of the first lithologic segment is(335.6±6.5)Ma,and the age of the second lithologic segment is(320.5±7.1)Ma,suggesting that the rocks belong to the late lower Carboniferous period to the upper Carboniferous period.Thus,the dispute over the lower and upper Carboniferous system for the Batamayineishan Formation has been solved.According to the comprehensive study,this set of continental volcanic rocks belongs to tectono-magmatic activities in the East Junggar tectonic belt from west to east under the background of chain suture.The residual ocean basin disappeared until the beginning of continental volcanic activity;in addition,it was affected by the tension environment on the western side and the island arc environment on the eastern side.Volcanic mechanisms,structures,and intermittent eruptions of the Batamayineishan Formation in the Oetanagar region suggest that it has petroleum geological significance.
作者
毕承彬
余牛奔
卢观送
尼加提·阿布都逊
潘飞
马比阿伟
BI Chengbin;YU Niuben;LU Guansong;NIJIATI·Abuduxun;PAN Fei;MABI Awei(Northwestern Jiangxi Geological Party,Bureau of Geology and Exploration and Development of Mineral Researches of Jiangxi Province,Jiujiang 332000,Jiangxi,China;Xinjiang Key Laboratory of Orogenic Belts,Continental Dynamics and Metallogenic Prediction,Urumqi 830047,Xinjiang,China;Xinjiang University,Urumqi 830047,Xinjiang,China;Chengdu University of Technology,Chengdu 610059,Sichuan,China)
出处
《中国地质》
CAS
CSCD
北大核心
2019年第6期1384-1395,共12页
Geology in China
基金
新疆维吾尔自治区中央返还两权价款项目（A15-1-LQ04）资助~~
关键词
三塘湖组
巴塔玛依内山组
陆相火山岩
地层厘定
地层解体
油气地层
地质调查工程
Santanghu Formation
Batamayineishan Formation
terrestrial volcanic
redetermination of strata
stratum disintegration
oil and gas strata
geological survey project
