|本期目录/Table of Contents|

[1]吴荣泽,张树栋,来林.内蒙古乌兰五台地区三叠纪铝质A型花岗岩年代学及地球化学特征[J].地球科学与环境学报,2015,37(06):47-58.
　WU Rong-ze,ZHANG Shu-dong,LAI Lin.Geochronological and Geochemical Characteristics of Triassic Aluminous Atype Granites in Wulanwutai Area of Inner Mongolia[J].Journal of Earth Sciences and Environment,2015,37(06):47-58.
点击复制

内蒙古乌兰五台地区三叠纪铝质A型花岗岩年代学及地球化学特征(PDF)
分享到：

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

卷:
第37卷
期数:
2015年第06期
页码:
47-58
栏目:
基础地质与矿产地质
出版日期:
2015-11-15

文章信息/Info

Title:
Geochronological and Geochemical Characteristics of Triassic Aluminous Atype Granites in Wulanwutai Area of Inner Mongolia
文章编号:
1672-6561(2015)06-0047-12
作者:
吴荣泽; 张树栋; 来林
天津市地质调查研究院，天津 300191
Author(s):
WU Rong-ze;  ZHANG Shu-dong;  LAI Lin
Tianjin Institute of Geological Survey, Tianjin 300191, China
关键词:
A型花岗岩; 岩石地球化学; 锆石; U-Pb定年; 三叠纪; 造山带; 构造背景; 内蒙古
Keywords:
A-type granite;  petrochemistry;  zircon;  U-Pb dating;  Triassic;  orogenic belt;  tectonic background;  Inner Mongolia
分类号:
P588.12+1
DOI:
-
文献标志码:
A
摘要:
基于1∶50 000区域地质调查工作，在内蒙古乌兰五台地区识别出铝质A型花岗岩。通过研究该套斑状二长花岗岩LA-ICP-MS锆石U-Pb年龄及地球化学特征，分析其成因类型，探讨早—中三叠世该区大地构造环境特征。结果表明：内蒙古乌兰五台地区斑状二长花岗岩单颗粒锆石U-Pb年龄加权平均值为(231.84±0.99)Ma，是印支期岩浆活动的产物，其岩石组合为中细粒、细粒斑状二长花岗岩；岩石地球化学特征属于高钾钙碱性系列，主量元素与微量元素表现为高硅、高碱，w(K2O)/w(Na2O)>1，A/CNK值为1.01～1.10的特点；Eu负异常明显，Rb、Th、K、Pb相对富集，Sr、Ti亏损；Ba、Nb、Sr、Ti呈现明显负异常，Rb、Th、K、Pb呈现明显正异常，w(Rb)/w(Sr)、w(Rb)/w(Ba)值高，w(Sr)/w(Ba)值低。上述特征显示该花岗岩为中—下地壳脱水部分熔融形成的岩浆侵位，可能形成于后碰撞挤压环境下的局部拉张构造环境，标志着大规模碰撞造山运动的结束和新的板内构造运动演化阶段的开始。
Abstract:
Based on 1∶50 000 regional geological surveys, aluminous A-type granite was identified in Wulanwutai area of Inner Mongolia. LA-ICP-MS zircon U-Pb ages and geochemical characteristics of porphyritic adamellite were studied, and the genesis and geotectonic setting characteristics in Early-Middle Triassic were discussed. The results show that the weighted average of single zircon U-Pb age of porphyritic adamellite in Wulanwutai area of Inner Mongolia is (231.84±0.99)Ma; it is a product of Indosinian magmatic activity; the rock is composed of medium fine and fine grained porphyritic adamellites; petrological and geochemical characteristic is high-K calc-alkaline series; major and trace elements have the characteristics of high silica and alkali, w(K2O)/w(Na2O) is more than 1, and A/CNK values are 1.01-1.10; Eu anomaly is obvious negative, Rb,Th, K and Pb are relatively rich, Sr and Ti are loss; Ba, Nb, Sr and Ti anomalies are obvious negative, Rb, Th, K and Pb anomalies are positive; w(Rb)/w(Sr) and w(Rb)/w(Ba) are high, and w(Sr)/w(Ba) is low. These characteristics indicate that the granite is magma emplacement formed by dehydration and partial melting of middle-lower crust, and is partial extension tectonic setting under the postcollisional compression environment; it marks the end of large-scale collision orogenic movement and the start of new intraplate tectonic movement and evolution.

参考文献/References:

-

相似文献/References:

[1]倪金龙,张红,唐小玲,等.诸城盆地早白垩世砂岩主量元素地球化学特征及其对物源区构造环境的制约[J].地球科学与环境学报,2016,38(05):587.
　NI Jin-long,ZHANG Hong,TANG Xiao-ling,et al.Characteristics of Major Element Geochemistry from Lower Cretaceous Sandstone in Zhucheng Basin and Their Constraint on Tectonic Setting of the Provenance[J].Journal of Earth Sciences and Environment,2016,38(06):587.
[2]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(06):623.
[3]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(06):638.
[4]汪帮耀,姜常义,李永军,等.新疆卡拉麦里姜巴斯套组火山岩地球化学特征与构造意义[J].地球科学与环境学报,2011,33(03):237.
　WANG Bang-yao,JIANG Chang-yi,LI Yong-jun,et al.Geochemical Characteristics and Tectonic Implications of Karamaili Jiangbasitao Formation Volcanic Rock in Xinjiang[J].Journal of Earth Sciences and Environment,2011,33(06):237.
[5]杨高学,李永军,司国辉,等.东准噶尔贝勒库都克铝质A型花岗岩微量元素地球化学特征及地质意义[J].地球科学与环境学报,2010,32(01):34.
　YANG Gao-xue,LI Yong-jun,SI Guo-hui,et al.Trace Elements Geochemistry Feature and Tectonic Significance of the Beilekuduke Aluminous A-type Granite in East Junggar[J].Journal of Earth Sciences and Environment,2010,32(06):34.
[6]梁志录,王云斌,刘宏伦,等.白银市乌金峡一带志留纪中酸性 侵入岩特征及构造意义[J].地球科学与环境学报,2008,30(03):240.
　LIANG Zhi-lu,WANG Yun-bin,LIU Hong-lun,et al.Chracteristic and Tectonic Significance of Intermediate-Acid Intrusive Rock in Wujinxia Area of Baiyin City[J].Journal of Earth Sciences and Environment,2008,30(06):240.
[7]胡能高,王锐,王晓霞,等.柴北缘塔塔楞环斑花岗岩的 矿物学特征及岩石学意义[J].地球科学与环境学报,2008,30(04):337.
　HU Neng-gao,WANG Rui,WANG Xiao-xia,et al.Mineralogical Characteristics and Petrological Significance of the Tataleng Rapakivi Granite in the Northern Margin of Qaidam Basin[J].Journal of Earth Sciences and Environment,2008,30(06):337.
[8]黄喜峰,钱壮志,吴文奎,等.贺兰山小松山基性—超基性 杂岩体岩石地球化学特征[J].地球科学与环境学报,2008,30(04):351.
　HUANG Xi-feng,QIAN Zhuang-zhi,WU Wen-kui,et al.Lithogeochemical Characteristics of Basic-Ultrabasic Intrusion , Xiaosongshan , Helanshan[J].Journal of Earth Sciences and Environment,2008,30(06):351.
[9]付建明,马昌前,谢才富,等.湘南西山铝质 A 型花岗质火山 侵入 杂岩的地球化学及其形成环境[J].地球科学与环境学报,2004,26(04):15.
　FU Jian-ming,MA Chang-qian,XIE Cai-fu,et al.Geochemistry and tectonic setting of Xishan aluminous A-type granitic volcanic-intrusive complex , Southern Hunan[J].Journal of Earth Sciences and Environment,2004,26(06):15.
[10]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(06):161.

备注/Memo

备注/Memo:
收稿日期:2015-04-10
基金项目:中国地质调查局地质大调查项目(基[2010]矿评01-19-01)
作者简介:吴荣泽(1980-),男,吉林大安人,工程师,E-mail:wurongze@126.com。
更新日期/Last Update: 2015-11-27