| 临沧地体亲缘性及南段组物源——来自泥盆纪—石炭纪南段组碎屑锆石U-Pb年龄的证据 |
| |
| 引用本文： | 曾文涛,刘桂春,冯庆来,赵天宇,俞赛赢,邓仁宏,莫熊.临沧地体亲缘性及南段组物源——来自泥盆纪—石炭纪南段组碎屑锆石U-Pb年龄的证据[J].地质通报,2017,36(7):1175-1187. |
| |
| 作者姓名： | 曾文涛 刘桂春 冯庆来 赵天宇 俞赛赢 邓仁宏 莫熊 |
| |
| 作者单位： | 1. 云南省地质调查院, 云南 昆明 650216;2. 中国地质大学地质过程与矿产资源国家重点实验室, 湖北 武汉 430074 |
| |
| 基金项目： | 中国地质调查局项目《云南区域地质调查片区总结与服务产品开发》（编号：DD20160345-02）、国家自然科学基金项目《滇西南原题特斯及其与古特提斯演化关系研究》（批准号：41672222）和云南省科技基金项目《西南"三江"叠合成矿作用与成矿预测》（编号：2013HA001） |
| |
| 摘 要： | 对临沧地体泥盆纪—石炭纪南段组的沉积岩开展碎屑锆石LA-ICP-MS U-Pb定年研究结果表明,所有样品的U-Pb年龄谱存在3个主要峰值:泛非期(530~680Ma)、晚格林威尔期(900~980Ma)和早格林威尔期(1100~1300Ma)。次要峰值年龄为1550~1730Ma和2350~2630Ma,反映了物源区构造-岩浆事件的复杂性。南段组碎屑岩锆石年龄图谱明显区别于思茅地块泥盆纪—石炭纪碎屑锆石年龄图谱,临沧地块南段组碎屑锆石的年龄表明其物源来自东冈瓦纳超大陆,临沧地体应该是来自东冈瓦纳北缘的微地块,这也与其生物特征相吻合。
|
| 关 键 词： | 碎屑锆石 LA-ICP-MS U-Pb年龄 物源分析 碎屑岩 南段组 临沧地体 滇西南 |
| 收稿时间： | 2016/12/1 0:00:00 |
| 修稿时间： | 2017/6/9 0:00:00 |
The relationship between Lincang block and prove-nance of Nanduan Formation:Evidence of detrital zircon U-Pb dating from metasandstone of Devonian-Carboniferous Nanduan Formation |
| |
| ZENG Wentao,LIU Guichun,FENG Qinglai,ZHAO Tianyu,YU Saiying,DENG Renhong and MO Xiong.The relationship between Lincang block and prove-nance of Nanduan Formation:Evidence of detrital zircon U-Pb dating from metasandstone of Devonian-Carboniferous Nanduan Formation[J].Geologcal Bulletin OF China,2017,36(7):1175-1187. |
| |
| Authors: | ZENG Wentao LIU Guichun FENG Qinglai ZHAO Tianyu YU Saiying DENG Renhong and MO Xiong |
| |
| Institution: | 1. Yunnan Institute of Geological Survey, Kunming 650216, Yunnan, China;2. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, Hubei, China |
| |
| Abstract: | U-Pb ages of detrital zircons of Devonian-Carboniferous Nanduan Formation from Lincang block define three distinctive age peaks in older Grenvillian (1100~1300Ma), younger Grenvillian (900~980Ma) and Pan-African (530~680Ma), and two subordi-nate group in 1550~1730Ma and 2350~2630Ma, suggesting that the provenance of sediments had multi-source and complex charac-teristics. The age spectrum is obviously different from detrital zircon age spectrum of the Devonian-Carboniferous sediments of Si-mao block, which indicates that the sediments of Nanduan Formation came from East Ganwana supercontinent, and the result is indi-cated by paleobiology which shows a genetic relationship between East Ganwana and paleo-Tethys in southwest Yunnan. |
| |
| Keywords: | detrital zircon LA-ICP-MS U-Pb age provenance analysis metasandstone Nanduan Formation Lincang block southwest Yunnan |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《地质通报》浏览原始摘要信息 |
| 点击此处可从《地质通报》下载免费的PDF全文 |
