帮助 关于我们

返回检索结果

内蒙古西拉木伦河两岸志留-泥盆系碎屑锆石年龄及其构造意义
Detrital zircon ages of the Silurian-Devonian clastic rocks in south and north banks of Xar Moron River, Inner Mongolia

查看参考文献70篇

程胜东 1   方俊钦 1   赵盼 1   徐备 1 *   鲍庆中 2   周永恒 2   邓荣敬 1  
文摘 为了通过碎屑岩的物源对比讨论古亚洲洋的闭合过程，笔者选择西拉木伦河北侧林西双井子地区和南侧奈曼旗下石碑地区的志留纪地层进行碎屑岩锆石U-Pb年代学研究。北侧样品LX0831-11为粉砂质板岩，采于西拉木伦河北岸上志留统杏树洼组。碎屑锆石年龄分为三组：385~531Ma(N=52)、872~1097Ma(N=11)、1344~1901Ma(N=11)，碎屑锆石的最小年龄限定地层沉积下限为中-晚泥盆世。南侧样品130417-06为石英岩屑砂岩，采于奈曼旗下石碑组顶部砂岩中。碎屑锆石年龄分为四组：370~523Ma(N=34)、884~1481Ma(N=21)、1573~1900Ma(N=6)、2369~2588Ma(N=8)，碎屑锆石的最小年龄限定地层沉积下限为晚泥盆世。这两个分别来自西拉木伦河南、北两侧原志留纪样品，显示一致的志留-泥盆纪及晚元古代碎屑锆石年龄谱，表明两者从泥盆纪开始即具有相同的沉积物源；而代表兴蒙造山带的元古代碎屑锆石在奈曼旗地区的出现，说明泥盆纪以来兴蒙造山带的剥蚀物已到达华北板块北缘。因此，本次碎屑锆石年代学研究暗示华北板块与其北部松辽地块在中-晚泥盆世之前已经完成拼合过程，即此时两者间已不存在古亚洲洋。
其他语种文摘 In order to determine closure time of the paleo-Asian Ocean at the northern margin of North China Craton,sedimentary and detrital zircon U-Pb geochronological studies of the Upper Silurian strata on northern and southern margins of the Xar Moron River have been carried out. Sample LX0831-11 was collected from silty slate of the Upper Silurian Xingshuwa Formation in Shuangjing area (Linxi) of the northern margin of Xar Moron River, which is mainly composed of lithic fragment (50%),quartz (30%) and feldspar (15%) with a few muscovite (5%). Seventy five zircons were selected randomly for LA-ICP-MS U-Pb dating and all of them are concordant. Based on the zircon CL images and U-Pb age concordia diagrams, the zircon can be divided into three groups : 385 ~ 531Ma (N=52) with a peak age of 412Ma, 872 ~1097Ma (N = 11), 1344 ~1901 Ma (N = 11). The youngest zircon age (385 ± 8Ma) constrains a maximum sedimentary age of the Middle-Late Devonian. The first group may be related to the denudation of the Early Paleozoic Airgin Sum-Sonidzuoqi-Xilinhot magmatic belt. The second group and the third group show provenance from the Proterozoic basement of the Xing' an-Mongolian Orogenic Belt. Sample 130417-06 was collected from sandstone on the top of Upper Silurian Xiashibei Formation in Xiashibei area (Naiman Banner),which located at the southern margin of Xar Moron River. The Xiashibei Formation consists mainly of limestone,sandstone and slate,and is rich in shallow marine fossils,e. g. corals,bryozoans and stromatoporoids in its middle part, representing a stable continental margin of the North China Craton. The sample is mainly composed of lithic fragment (65%) , quartz (30%) and feldspar (5%). Seventy five zircons are selected randomly for U-Pb dating and 69 of them are concordant. Based on the zircon CL images and U-Pb age concordia diagrams, these ages can be divided into four groups: 370 ~523Ma (N=34) with a peak age of 412Ma, 884 ~1481 Ma (N=21), 1573 ~ 1900Ma (N=6) and 2369 ~2588Ma (N = 8). For the first age group, the 500 ~ 400Ma zircons may be related to the Early Paleozoic Tugurige-Damaoqi-Ondor Sum-Xianghuang Banner-Jiefangyingzi arc magmatic belt. While 370 ~400Ma zircons may come from the Early-Middle Devonian alkaline rocks and mafic intrusion along the northern margin of the North China Craton. The second group corresponds to the Precambrian basement of the Xing ' an-Mongolian Orogenic Belt. The third and fourth groups display the similar distribution as the North China Craton, which indicates the North China Craton was a probable source area for the two groups. The Xar Moron River is considered as the Late Paleozoic suture line between the North China Craton and blocks to the north. However, the two samples collected from the both banks of the river show similar detrital zircon age distribution from the Middle Devonian to Mesoproterozoic, which indicates the same provenance for these two samples after the Middle Devonian. On the other hand, because the age distribution of the Songliao Block is characterized by the Newproterozoic to Mesoproterozoic zircons, their occurrence in the north margin of North China Craton suggests that the two blocks were near each other and the Paleo Asian Ocean between them has been closed during the Middle to Late Devonian.
来源 岩石学报 ,2014,30(7):1909-1921 【核心库】
关键词 碎屑锆石定年 ; 西拉木伦河 ; 内蒙古 ; 兴蒙造山带 ; 古亚洲洋
地址

1. 北京大学地球与空间科学学院, 造山带与地壳演化教育部重点实验室, 北京, 100871  

2. 沈阳地质矿产研究所, 沈阳, 110034

语种 中文
文献类型 研究性论文
ISSN 1000-0569
学科 地质学
基金 国家973计划 ;  国家自然科学基金项目 ;  国土资源部中国地质调查局项目
文献收藏号 CSCD:5188624

参考文献 共 70 共4页

1.  Anderson T. Correction of common lead in U-Pb analyses that do not report ~(204)Pb. Chemical Geology,2002,192(1/2):59-79 被引 2321 次    
2.  Badarch G. A new terrane subdivision for Mongolia : Implications for the Phanerozoic crustal growth of Central Asia. Journal of Asian Earth Sciences,2002,21(1):87-110 被引 245 次    
3.  Chen B. Two contrasting paleozoic magmatic belts in northern Inner Mongolia, China : Petrogenesis and tectonic implications. Tectonophysics,2000,328(1/2):157-182 被引 365 次    
4.  Deng S H. Discovery of a Late Permian Angara-Cathaysia mixed flora from Acheng of Heilongjiang, China, with discussions on the closure of the Paleoasian Ocean. Science in China (Series D), (in Chinese),2009,52(11):1746-1755 被引 4 次    
5.  Dobretsov N L. Opening and tectonic evolution of the Paleo-Asian Ocean. International Geology Review,1995,37(4):335-360 被引 110 次    
6.  Guo F. Early Paleozoic subduction of the Paleo-Asian Ocean : Geochronological and geochemical evidence from the Dashizhai basalts, Inner Mongolia. Science in China (Series D),2009,52(7):940-951 被引 26 次    
7.  Han B F. Age, geochemistry, and tectonic implications of a Late Paleozoic stitching pluton in the North Tianshan suture zone, western China. Geological Society of America Bulletin,2010,122(3/4):627-640 被引 176 次    
8.  Jian P. Time scale of an Early to Mid-Paleozoic orogenic cycle of the long-lived Central Asian Orogenic Belt, Inner Mongolia of China: Implications for continental growth. Lithos,2008,101(3/4):233-259 被引 320 次    
9.  Jian P. Evolution of a Permian intraoceanic arc-trench system in the solonker suture zone, Central Asian Orogenic Belt, China and Mongolia. Lithos,2010,118(1/2):169-190 被引 232 次    
10.  Khain E V. The most ancient ophiolite of the Central Asian fold belt: U-Pb and Pb-Pb zircon ages for the Dunzhugur Complex,Eastern Sayan,Siberia,and geodynamic implications. Earth and Planetary Science Letters,2002,199(3/4):311-325 被引 101 次    
11.  Li J Y. Permian geodynamic setting of Northeast China and adjacent regions : closure of the Paleo-Asian Ocean and subduction of the Paleo-Pacific Plate. Journal of Asian Earth Sciences,2006,26(3/4):207-224 被引 509 次    
12.  Ludwig K R. Isoplot/Ex : A geochronological tool kit for Microsoft Excel version 3. 00. Berkeley : Berkeley Geochronology Center,2003,4:1-70 被引 2 次    
13.  Miao L C. SHRIMP U-Pb zircon geochronology of granitoids from Dongping area, Hebei Province, China : Constraints on tectonic evolution and geodynamic setting for gold metallogeny. Ore Geology Reviews,2002,19(3/4):187-204 被引 42 次    
14.  Rojas-Agramonte Y. Detrital and xenocrystic zircon ages from Neoproterozoic to Palaeozoic arc terranes of Mongolia : Significance for the origin of crustal fragments in the Central Asian Orogenic Belt. Gondwana Research,2011,19(3):751-763 被引 59 次    
15.  Sengor A M C. Turkic-type orogeny and its role in the making of the continental crust. Annual Review of Earth and Planetary Sciences,1996,24(1):263-337 被引 114 次    
16.  Shang Q H. Occurrences of Permian radiolarians in central and eastern Nei Mongol (Inner Mongolia) and their geological significance to the Northern China Orogen. Chinese Science Bulletin,2004,49(24):2613-2619 被引 20 次    
17.  Sldma J. Plesovice zircon : A new natural reference material for U-Pb and Hf isotopic microanalysis. Chemical Geology,2008,249(1/2):1-35 被引 590 次    
18.  Tang K D. Tectonic development of Paleozoic foldbelts at the north margin of the Sino-Korean Craton. Tectonics,1990,9(2):249-260 被引 225 次    
19.  Wang F. Precambrian terrane within the Songnen-Zhangguangcai Range Massif, NE China : Evidence from U-Pb ages of detrital zircons from the Dongfengshan and Tadong group. Gondwana Research,2013,26(1):402-413 被引 4 次    
20.  Wang Q. Paleoplate tectonics between Cathaysia and Angaraland in Inner Mongolia of China. Tectonics,1986,5(7):1073-1088 被引 96 次    
引证文献 11 篇

1 黄波 内蒙古贺根山蛇绿岩形成时代及构造启示 岩石学报,2016,32(1):158-176
被引 49 次

2 杨甫 锆石U-Pb定年与微量元素分析的地质应用 科技导报,2016,34(18):221-229
被引 5 次

显示所有11篇文献

论文科学数据集
PlumX Metrics
相关文献

 作者相关
 关键词相关
 参考文献相关

版权所有 ©2008 中国科学院文献情报中心 制作维护：中国科学院文献情报中心
地址：北京中关村北四环西路33号 邮政编码：100190 联系电话：(010)82627496 E-mail:cscd@mail.las.ac.cn 京ICP备05002861号-4 | 京公网安备11010802043238号