必须声明标量变量 "@Script_ID"。 东北漠河盆地开库康组LA-MC-ICP-MS锆石U-Pb年龄及其构造意义-《地球科学与环境学报》
|本期目录/Table of Contents|

[1]杨晓平,胡道功,刘晓佳,等.东北漠河盆地开库康组LA-MC-ICP-MS锆石U-Pb年龄及其构造意义[J].地球科学与环境学报,2018,40(03):237-251.
 YANG Xiao-ping,HU Dao-gong,LIU Xiao-jia,et al.LA-MC-ICP-MS Zircon U-Pb Ages of Kaikukang Formation and Their Tectonic Implications in Mohe Basin, Northeast China[J].Journal of Earth Sciences and Environment,2018,40(03):237-251.
点击复制

东北漠河盆地开库康组LA-MC-ICP-MS锆石U-Pb年龄及其构造意义(PDF)
分享到:

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第40卷
期数:
2018年第03期
页码:
237-251
栏目:
基础地质与矿产地质
出版日期:
2018-05-15

文章信息/Info

Title:
LA-MC-ICP-MS Zircon U-Pb Ages of Kaikukang Formation and Their Tectonic Implications in Mohe Basin, Northeast China
文章编号:
1672-6561(2018)03-0237-15
作者:
杨晓平胡道功刘晓佳张文龙汪岩王超群
1.中国地质调查局沈阳地质调查中心,辽宁 沈阳 110034; 2.中国地质科学院地质力学研究所,北京 100081; 3.黑龙江省地质调查研究总院齐齐哈尔分院,黑龙江 哈尔滨 150036
Author(s):
YANG Xiao-ping HU Dao-gong LIU Xiao-jia ZHANG Wen-long WANG Yan WANG Chao-qun
1. Shenyang Center of Geological Survey, China Geological Survey, Shenyang 110034, Liaoning, China; 2. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China; 3. Qiqihar Branch, Heilongjiang Institute of Geological Survey, Harbin 150036, Heilongjiang, China
关键词:
锆石U-Pb年龄凝灰岩砂岩下白垩统开库康组山间盆地逆冲推覆构造漠河盆地
Keywords:
zircon U-Pb age tuff sandstone Lower Cretaceous Kaikukang Formation intermountain basin thrust-nappe structure Mohe Basin
分类号:
P597
DOI:
-
文献标志码:
A
摘要:
通过对漠河盆地东北部“上侏罗统”开库康组的研究,发现了其与下伏中侏罗统二十二站组之间的不整合面,同时对开库康组砂岩和火山岩夹层进行了LA-MC-ICP-MS锆石U-Pb定年,获得的2个样品中最年轻的碎屑锆石206Pb/238U加权平均年龄均为159 Ma,反映了沉积下限不早于晚侏罗世;在其内的火山岩夹层中获得的岩浆锆石206Pb/238U年龄分别为(136.6±1.9)、(137.5±2.5)Ma,该年龄与开库康组内发育的Coniopteris-Phoenicopsis植物群晚期化石组合和Ruffordia-Onychiopsis早期化石组合反映的时代吻合,表明开库康组形成于早白垩世早期,而非原划分的晚侏罗世。开库康组形成时代及其下伏地层锆石U-Pb年龄揭示了构造不整合面形成于137~145 Ma,进一步约束了蒙古—鄂霍茨克洋闭合之后漠河逆冲推覆构造形成时间及从侏罗纪伸展盆地转化为白垩纪挤压山间盆地的时代。开库康组时代的重新厘定对进一步研究漠河盆地与蒙古—鄂霍茨克造山带的关系提供了新的资料。
Abstract:
Based on the geological investigation of “Upper Jurassic” Kaikukang Formation in the northeast of Mohe Basin, Northeast China, an unconformity is found between Kaikukang Formation and the underlying Ershierzhan Formation of Middle Jurassic. Meanwhile, the ages of sandstone on the interlayer and volcanic rocks in Kaikukang Formation were determined by LA-MC-ICP-MS zircon U-Pb dating. The youngest weighted average age of detrital zircon U-Pb is 159 Ma, indicating that the lower limit of deposition is not earlier than Early Cretaceous; the magmatic zircon 206Pb/238U ages obtained in the interlayer of volcanic rocks are (136.6±1.9)Ma and (137.5±2.5)Ma respectively, and they are in accordance with the age of reflection in the late fossil association of Coniopteris-Phoenicopsis flora and the early fossil association of Ruffordia-Onychiopsis flora in Kaikukang Formation. All these ages and fossils strata comparison results show that Kaikukang Formation forms in the early Early Cretaceous, rather than Late Jurassic classified by previous research. The structural unconformity between Kaikukang Formation and the underlying Ershierzhan Formation should be formed during 137-145 Ma according to the dating results, and this further restricts the formation time of Mohe thrust-nappe structure and the transformation age from Jurassic extensional basin to Cretaceous compresses intermountain basin after Mongolia-Okhotsk ocean closed. This redividing for Kaikukang Formation provides a new geological information for further studying the relationship between Mohe Basin and Mongolian-Okhotsk orogenic belt.

参考文献/References:

-

相似文献/References:

[1]宁培松,龙群,程婷,等.鲁西地块晚中生代中—基性岩地球化学和Sr-Nd-Pb同位素组成特征[J].地球科学与环境学报,2013,35(04):62.
 NING Pei-song,LONG Qun,CHENG Ting,et al.Geochemistry and Sr-Nd-Pb Isotopic Composition of Late Mesozoic Intermediate-basic Rock in Western Shandong Block[J].Journal of Earth Sciences and Environment,2013,35(03):62.
[2]徐多勋,杨拴海,李瑞保,等.西秦岭西段塔洞花岗闪长岩体年代学、地球化学特征及其地质意义[J].地球科学与环境学报,2015,37(03):22.
 XU Duo-xun,YANG Shuan-hai,LI Rui-bao,et al.Geochronological, Geochemical Characteristics and Geological Significance of Tadong Granodiorite Pluton in the Western Section of West Qinling[J].Journal of Earth Sciences and Environment,2015,37(03):22.
[3]崔维龙,刘正宏,杜洋,等.辽东地区大兴岩体LA-ICP-MS锆石U-Pb定年、地球化学特征及地质意义[J].地球科学与环境学报,2016,38(05):623.
 CUI Wei-long,LIU Zheng-hong,DU Yang,et al.LA-ICP-MS Zircon U-Pb Dating, Geochemical Characteristics and Geological Significance of Daxing Pluton in Liaodong Area[J].Journal of Earth Sciences and Environment,2016,38(03):623.
[4]张琳,杨言辰,韩世炯,等.黑龙江新立金矿床片麻状花岗岩锆石U-Pb定年及其地质意义[J].地球科学与环境学报,2016,38(05):638.
 ZHANG Lin,YANG Yan-chen,HAN Shi-jiong,et al.Zircon U-Pb Dating and Geological Significance of Gneissic Granite in Xinli Gold Deposit of Heilongjiang[J].Journal of Earth Sciences and Environment,2016,38(03):638.
[5]贾晓彤,张英利,王宗起,等.扬子北缘下高川盆地上泥盆统铁矿梁组沉积物源分析[J].地球科学与环境学报,2017,39(01):47.
 JIA Xiao-tong,ZHANG Ying-li,WANG Zong-qi,et al.Analysis of Sediment Provenance of Upper Devonian Tiekuangliang Formation in Xiagaochuan Basin, the Northern Margin of Yangtze Plate[J].Journal of Earth Sciences and Environment,2017,39(03):47.
[6]李超,孙克克,陈斌.辽东营口—辽阳地区古元古代花岗岩和变质基性岩形成时代及意义[J].地球科学与环境学报,2017,39(02):143.
 LI Chao,SUN Ke-ke,CHEN Bin.Paleoproterozoic Granites and Meta-mafic Rocks from Yingkou-Liaoyang Area of the Eastern Liaoning and Their Significance[J].Journal of Earth Sciences and Environment,2017,39(03):143.
[7]聂世嘉,杨言辰,韩世炯,等.辽宁排山楼金矿床黑云母花岗岩成岩时代及地质意义[J].地球科学与环境学报,2017,39(02):161.
 NIE Shi-jia,YANG Yan-chen,HAN Shi-jiong,et al.Formation Age and Geological Significance of Biotite Granite in Paishanlou Au Deposit of Liaoning, China[J].Journal of Earth Sciences and Environment,2017,39(03):161.
[8]黄栋,张成立,马中平,等.西天山阿吾拉勒东南部晚石炭世—中二叠世中酸性小岩体成因及地质意义[J].地球科学与环境学报,2017,39(02):175.
 HUANG Dong,ZHANG Cheng-li,MA Zhong-ping,et al.Origin and Its Geological Significance of Late Carboniferous-Middle Permian Intermediate-acid Small Plutons in the Southeastern Awulale Area of West Tianshan, China[J].Journal of Earth Sciences and Environment,2017,39(03):175.
[9]柳政甫,李秋根,王宗起,等.西昆仑慕士塔格岩体锆石U-Pb和黑云母40Ar-39Ar年龄及其地质意义[J].地球科学与环境学报,2017,39(03):344.
 LIU Zheng-fu,LI Qiu-gen,WANG Zong-qi,et al.Zircon U-Pb and Biotite 40Ar-39Ar Ages of Muztag Pluton in West Kunlun and Their Geological Significance[J].Journal of Earth Sciences and Environment,2017,39(03):344.
[10]方博文,张贺,叶日胜,等.南秦岭老城花岗岩成因:锆石U-Pb年龄和Sr-Nd同位素的制约[J].地球科学与环境学报,2017,39(05):633.
 FANG Bo-wen,ZHANG He,YE Ri-sheng,et al.Petrogenesis of Laocheng Granite in South Qinling: Constraints from Zircon U-Pb Age and Sr-Nd Isotopic Composition[J].Journal of Earth Sciences and Environment,2017,39(03):633.

备注/Memo

备注/Memo:
收稿日期:2018-01-25;修回日期:2018-04-04
基金项目:中国地质调查局地质调查项目(DD20160345-17)
作者简介:杨晓平(1969-),男,黑龙江哈尔滨人,高级工程师,E-mail:yangxiaoping0452@163.com。
通讯作者:胡道功(1963-),男,湖北钟祥人,研究员,理学博士,E-mail:hudg@263.net。
更新日期/Last Update: 2018-06-05