额济纳旗大狐狸山地区干泉组火山岩锆石U-Pb测年及其意义
Zircon U-PbDating about Volcanic Rocks of Ganquan Formation in Dahulishan Area, Ejina Banner and Its Geological Implication
-
摘要: 银额盆地干泉组火山岩段和碎屑岩段在大狐狸山地区出露较全,火山岩段由含晶屑玄武岩和中酸性火山岩构成双峰式火山岩组合。本次研究在含晶屑玄武岩中获得(305.2±3.9)Ma(MSWD=7.9)的LA-ICP-MS单颗粒锆石微区U-Pb同位素年龄,表明干泉组火山岩时代为晚石炭世,结合地层间接触关系,将干泉组时代定为晚石炭世一早二叠世。这一资料对于分析银额盆地北部红石山-黑鹰山坳陷充填演化意义重大,晚石炭世盆地属于裂谷盆地,发生快速裂解沉积巨厚的碎屑岩-火山岩。
-
关键词:
- LA-ICP-MS锆石U-Pb测年 /
- 干泉组 /
- 晚石炭世
Abstract: Volcanic and clastic rock members of Ganquan Formation within Yin'e basin hasoutcropped in Dahulishan area very well. The volcanic rock member is consists of basalt with crystal pyroclast and intermediate-acidic volcanic rocks, forming a bimodal volcanic rock assemblage.Through using LA-ICP-MS zircon U-Pb dating, the isotopic ages of (305.2±3.9)Ma(MSWD=7.9) for basalt with crystal pyroclast have been obtained in this paper, indicating the age for the strata of Ganquan Formation is Late Carboniferous. Combining with the contact relationships among these strata, it's determined that the age of Ganquan Formation is Late Carboniferous-Early Permian. This data has a great significance for analyzing the depression and filling evolution process of Hongshishan-Heiyingshan in the northern part of Yin'e basin. Thus, this Late Carboniferous basin belongs to the rift basin, developing a rapid cleavage and depositing a giant thick clastic rocks and volcanic rocks.-
Key words:
- LA-ICP-MS zircon U-Pb dating /
- Ganquan Formation /
- Late Carboniferous
-
-
卢进才,陈高潮,魏仙样,等.内蒙古西部额济纳旗及其邻区石炭系-二叠系沉积建造与生烃条件-石炭系-二叠系油气地质条件研究之一[J].地质通报,2011,30(6):811-826.
LU Jincai, CHEN Gaochao, WEI Xianyang, et al. Carboniferous-Permian sedimentary formation and hydrocarbon generation conditions in Ejin Banner and its vicinities, western Inner Mongolia: a study of Carboniferous-Permian petroleum geologicalk conditions(part 1)[J].Geological Bulletin of China,2011,30(6):811-826.
陈高潮,李玉宏,史冀忠,等.内蒙古西部额济纳旗及其邻区石炭纪-二叠纪盆地重矿物的特征及意义[J].地质通报,2011,30(6):962-971.
CHEN Gaochao, LI Yuhong, SHI Jizhong, et al. Heavy mineral characteristics of Carboniferous-Permian strata in Ejin Banner and its vicinities, western Inner Mongolia, and their significance[J].Geological Bulletin of China,2011,30(6): 962-971.
徐学义,何世平,王洪亮,等.中国西北部地质概论-秦岭、祁连、天山地区[M].北京:科学出版社, 2008:195-222.
XU Xueyi, HE Shiping, WANG Hongliang,et al.Geological generality of in North-west China[M]. Beijing:Science Press,2008:195-222.
李长民. 锆石成因矿物学与锆石微区定年综述[J]. 地质调查与研究.2009,33(3):161-174.
LI Changmin.A Review on the Minerageny and Situ Microanalytical DatingTechniques of Zircons[J].Geological Survey and Research, 2009,33(3): 161-174.
钱一雄,何治亮,蔡习尧,等. 塔中地区上泥盆统东河砂岩和志留系砂岩的锆石特征、SHRIMP U-Pb年龄及地质意义[J].岩石学报,2007,23(11):3003-3014.
QIAN Yixiong, HE Zhiliang,CAI Xiyao,et al.Characteriscits of and U-Pb ages of zircons and its implication from zircon of Donhe sandstones of The upper Devonian and Silurian sandstones in Tazhong area,Tarim basin[J].Acta Petrologica Sinica,2007, 23(11):3003-3014.
唐俊华,顾连兴,张遵忠,等.咸水泉片麻状花岗岩锆石热液增生边阴极发光及稀土元素特征[J].自然科学进展,2008,18(7):769-777.
TANG Junhua,GU Lianxing,ZHANG Zunzhong,et al.Salt water fountain hemp shaped granite hydrothermal zircons proliferation and cathodoluminescence and rare earth element characteristics[J].Progress in Natural Science,2008,18(7):769-777.
吴元保,郑永飞.锆石成因矿物学研究及其对U-Pb年龄解释的制约[J].科学通报, 2004,49(16): 1589-1604.
WU Baoyuan,ZHEN Yongfei.Zircon genetic mineralogy research and interpretation of U-Pb age restriction[J]. Science Bulletin of China,2004,49(16): 1589-1604.
夏林圻,夏祖春,徐学义,等.天山及邻区石炭纪-早二叠世裂谷火山岩岩石成因[J].西北地质,2008,41(4):1-68.
XIA Linqi,XIA Zuchun,XU Xueyi,et al.Petrogenesis of Caboniferous-Early Permian Rift-Related VolcanicRocks in the Tianshan and its NeighboringAreas,Northwestern China[J].Northwestern Geology,2008,41(4):1-68.
李向民,余吉远,王国强,等.甘肃北山红柳园地区泥盆系三个井组和墩墩山群LA-ICP-MS锆石U-Pb测年及其意义[J].地质通报,2011,30(10):1501-1507.
LI Xiangmin, YU Jiyuan, WANG Guoqiang, et al. LA-ICP-MS zircon U-Pb dating of Devonian Sangejing Formation and Dundunshan Group in Hongliuyuan, Beishan area, Gansu Province[J]. Geological Bulletin of China, 2011, 30(10):1501-1507.
高长林,黄泽光,刘光祥.中国西部古中亚洋与古生代沉积盆地[J].中国西部油气地质,2006,2(2):123-129.
GAO Changlin, HUANG Zeguang, LIU Guangxiang. Paleo-Asia Ocean and Palaeozoic Basins in West China[J].West China petroleum Geosciences,2006,2(2):123-129.
HORNI, RUDNICK R L,MCDONOUGH W F.Precise elemental andisotope ratio determination by simultaneous solution nebulizationand laser ablation-ICP-MS:application to U-Pb geochronology[J].Chemical Geology,2000,167:405-425.
BALLARD J R, PALIN J M, WILLIAMS I S, et al. Two ages of porphyry intrusion resolved for the super-giant Chuquicamatacopper deposit of northern Chilc by ELA-ICP-MS and SHRIMP[J].Geology,2001,29:383-386.
KOSLER J,FONNELAND H, SYLVESTER P, et al. U-Pb dating of detrital zircons for sediment provenance studies-a comparison of laser ablation ICPMS and SIMS techniques[J]. Chemical Geology,2002,182:605-618.
YUAN H L. WU F Y, GAO S.LA-ICPMS zircon U-Pb datingand REE analysis of Cenozoic intrusion from northeastern regionof China[J]. China Sciences Bulletin, 2003,8(14):1511-1520.
HERMANN J,RUBATTO D,KORSAKOV A.Multiple zircon growthduring fast exhumation of diamondiferous,deeply subducted continental crust(Kokchetav Massif,Kazakhstan)[J]. Contrib Mineral Petrol,2001,141:66-82.
-
计量
- 文章访问数: 2341
- PDF下载数: 2357
- 施引文献: 0
下载: