| Citation: |
HU Xinzhuo, YANG Jiyuan, DENG Wen, TIAN Guanghao, SUN Xiao, QIN Danhe. 2024. The formation age, origin and tectonic environment of gneissic granite in Xiaohuangshan, Beishan area, Inner Mongolia. Geological Bulletin of China, 43(6): 1059-1071. doi: 10.12097/gbc.2022.02.018
|
The formation age, origin and tectonic environment of gneissic granite in Xiaohuangshan, Beishan area, Inner Mongolia
-
Abstract
Through a 1∶50000 regional geological survey, gneissic medium−fine−grained granodiorite, gneissic fine−grained monzogranite and gneiss−like intrusive rocks were newly disintegrated in the Xiaohuangshan area of Beishan area, Inner Mongolia. Porphyry medium−fine−grained biotite monzonitic granite, among which gneissic−to−medium−grained granodiorite and gneissic fine−grained monzonitic granite are closely associated in space. The formation age, origin and tectonic environment of gneissic granite in Xiaohuangshan area was studied in this paper. The zircon LA−ICP−MS U−Pb method was used to obtain magma crystallization ages of 443.0±1.2 Ma and 441.9±1.6 Ma respectively in gneissic medium−fine−grained granodiorite and gneissic fine−grained monzogranite. The era is early Silurian. Rock geochemical analysis shows that both gneissic medium−fine−grained granodiorite and gneissic fine−grained monzogranite are calc−alkaline series rocks, with a low alkalinity rate AR of 1.82 to 2.86, and a small range of variation. The Gordini index τ is 21.22 ~ 64.24 (τ>10); the rock is enriched in light rare earth elements and large ion lithophile elements such as K, Rb, and Ba, and is depleted in high field strength elements Nb, P, and Ti, and has characteristics of island arc magmatic rocks or orogenic igneous rocks. Based on the comprehensive analysis of previous research results, the gneissic medium−fine−grained granodiorite and gneissic fine−grained monzogranite were formed in the island arc tectonic environment and are important components of the East Qiyishan−Gongpoquan island arc zone.
-
-
References
[1] Anderson T. 2002. Correction of common lead in U–Pb analyses that do not report 204Pb[J]. Chemical Geology, 192(1/2): 59−79. [2] Boynton, W. V. 1984. Geochemistry of the rare earth elements: meteorites studies[C]//Henderson P. Rare Earth Element Geochemistry. New York, Elservier: 63−114. [3] Batchelor R A, Bowden P. 1985. Petrogenetic interpretation of granitoid rock series using multicationic parameters[J]. Chemical Geology, 48(1/4): 43−55. doi: 10.1016/0009-2541(85)90034-8 [4] Jackson S E, Pearson N J, Griffin W L, et al. 2004. The application of laser ablation−inductively coupled plasma−mass spectrometry to in situ U−Pb zircon geochronology[J]. Chemical Geology, 211(1/2): 47−69. [5] Ludwig K R. 2003. User's Manual for Isoplot 3.00−A Geochronological Toolkit for Microsoft Excel[J]. Berkeley Geochronology Center Special Publication, 4: 1−70. [6] Liu Y S, Gao S, Hu Z C, et al. 2010. Continental and oceanic crust recycling−induced melt–peridotite interactions in the Trans−North China Orogen: U–Pb dating, Hf isotopes and trace elements in zircons from mantle xenoliths[J]. Journal of Petrology, 51(1/2): 537−571. [7] Maniar P D, Piccoli P M. 1989. Tectonic discrimination of granitoids[J]. GSA Bulletin, 101: 635−643. doi: 10.1130/0016-7606(1989)101<0635:TDOG>2.3.CO;2 [8] Middlemost E A K. 1994. Naming materials in the magma/igneous rock system[J]. Earth−Science Reviews, 37(3/4): 215−224. doi: 10.1016/0012-8252(94)90029-9 [9] Nakada S, Takahashi M. 1979. Regional variation in chemistry of the Miocene intermediate to felsic magmas in the Outer Zone and the Setouchi Province of Southwest Japan[J]. Journal of the Geological Society of Japan, 85(9): 571−582(in Japanese with English abstract). [10] Pearce J A, Harris N B W, Tindle A G. 1984. Trace Element Discrimination Diagrams for the Tectonic Interpretation of Granitic Rocks[J]. Journal of Petrology, 25(4): 956−983. doi: 10.1093/petrology/25.4.956 [11] Rittmann A. 1973. Stable Mineral Assemblages of Igneous Rocks[M]. Oxford London: Blackwell Scientific Publication. [12] Sun S S, McDonough W F. 1989. Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes[J]. Geological Society of London Special Publications, 42(1): 313−345. doi: 10.1144/GSL.SP.1989.042.01.19 [13] Vinogradov A P. 1962. Average contents of chemical elements in the principal types of igneous rocks of the Earth’s crust[J]. Geokhimiya, 7(7): 641−664. [14] 戴霜, 方小敏, 张翔, 等. 2003. 北山中部地区闪长岩−花岗岩类成因及构造背景[J]. 兰州大学学报(自然科学版), 39(1): 86−92. [15] 董洪凯, 孟庆涛, 刘广, 等. 2018. 内蒙古北山地区标山一带早志留世花岗岩地球化学特征及构造意义[J]. 西北地质, 51(1): 159−174. doi: 10.3969/j.issn.1009-6248.2018.01.016 [16] 高秉璋, 洪大卫, 方宗斌, 等. 1991. 花岗岩类区1∶5万区域地质填图方法指南[M]. 武汉: 中国地质大学出版社. [17] 龚全胜, 刘明强, 梁明宏, 等. 2003. 北山造山带大地构造相及构造演化[J]. 西北地质, 36(1): 11−17. doi: 10.3969/j.issn.1009-6248.2003.01.002 [18] 韩吟文, 马振东, 张宏飞, 等. 2003. 地球化学[M]. 北京: 科学出版社. [19] 黄汲清, 任纪舜, 姜春发, 等. 1980. 中国大地构造及演化[M]. 北京: 科学出版社. [20] 候青叶, 王忠, 刘全宝, 等. 2012. 北山月牙山蛇绿岩地球化学特征及SHIMP定年[J]. 现代地质, 26(5): 1008−1018. doi: 10.3969/j.issn.1000-8527.2012.05.022 [21] 胡新茁, 赵国春, 胡新悦, 等. 2015. 内蒙古北山地区月牙山蛇绿质构造混杂岩带的地质特征、形成时代及大地构造意义[J]. 地质通报, 34(2/3): 425−436. [22] 胡醒民, 廖云峰, 程海峰, 等. 2016. 内蒙古月牙山一带基性火山岩的地质特征、形成时代及归属[J]. 地质通报, 35(8): 1234−1242. doi: 10.3969/j.issn.1671-2552.2016.08.004 [23] 梁国庆, 徐旭明, 孟庆涛, 等. 2016. 内蒙古1∶5万旱山(K47E015013)、小尘包(K47E015014)、望京山(K47E016013)、涌珠泉幅(K47E016014)区域地质矿产调查[R]. 河北省区域地质矿产调查研究所. [24] 李四光. 1973. 地质力学概论[M]. 北京: 科学出版社. [25] 李春昱. 1983. 我国北部边陲及邻区的古板块构造与欧亚大陆的形成[M]. 中国北方板块构造文集, (1): 3−16. [26] 黎彤. 1984. 大洋地壳和大陆地壳的元素丰度[J]. 大地构造与成矿学, 8(1): 19−27. [27] 李昌年. 1992. 火成岩微量元素岩石学[M]. 武汉: 中国地质大学出版社. [28] 廖云峰, 胡新茁, 程海峰, 等. 2016. 内蒙古月牙山蛇绿岩的岩石学、地球化学特征及其地质意义[J]. 地质通报, (35)8: 1243−1254. [29] 孟庆涛, 徐翠, 张正平, 等. 2021. 内蒙古北山地区阿民乌素公婆泉组变质火山岩年代学、地球化学特征及地质意义[J]. 矿物岩石, 41(1): 67−79. [30] 邱家骧, 林景仟. 1991. 岩石化学[M]. 北京: 地质出版社. [31] 吴福元, 李献华, 杨进辉, 等. 2007. 花岗岩成因研究的若干问题[J]. 岩石学报, 23(6): 1217−1238. doi: 10.3969/j.issn.1000-0569.2007.06.001 [32] 武鹏, 王国强, 李向民, 等. 2012. 甘肃北山地区牛圈子蛇绿岩的形成时代及地质意义[J]. 地质通报, 31(12): 2032−2037. doi: 10.3969/j.issn.1671-2552.2012.12.012 [33] 王国强, 李向民, 徐学义, 等. 2021. 北山造山带古生代蛇绿混杂岩研究现状及进展[J]. 地质通报, 40(1): 71−81. [34] 肖庆辉, 邓晋福, 马大铨, 等. 2002. 花岗岩研究思维与方法[M]. 北京: 地质出版社. [35] 于福生, 王春英, 漆家福, 等. 2000. 甘新交界红柳河地区早志留世蛇绿混杂岩的厘定及大地构造意义[J]. 矿物岩石, 20(4): 60−66. doi: 10.3969/j.issn.1001-6872.2000.04.012 [36] 杨合群, 李英, 李文明, 等. 2009. 北山花岗岩S型/I型空间变化规律及含矿性[J]. 地球学报, 30(5): 627−633. doi: 10.3321/j.issn:1006-3021.2009.05.008 [37] 杨合群, 李英, 赵国斌, 等. 2010. 北山蛇绿岩特征及构造属性[J]. 西北地质, 43(1): 26−36. doi: 10.3969/j.issn.1009-6248.2010.01.002 [38] 杨建国, 谢春林, 王小红, 等. 2012. 甘肃北山地区基本构造格局和成矿系列特征[J]. 地质通报, 31(2): 422−438. doi: 10.3969/j.issn.1671-2552.2012.02.028 [39] 杨合群, 赵国斌, 李英, 等. 2012. 新疆−甘肃−内蒙古衔接区古生代构造背景与成矿的关系[J]. 地质通报, 31(2): 413−421. doi: 10.3969/j.issn.1671-2552.2012.02.027 [40] 周国庆, 赵建新, 李献华, 等. 2000. 内蒙古月牙山蛇绿岩特征及形成的构造背景: 地球化学和Sr−Nd同位素制约[J]. 地球化学, 29(2): 108−119. doi: 10.3321/j.issn:0379-1726.2000.02.002 [41] 郑荣国, 吴泰然, 张文, 等. 2012. 北山地区月牙山−洗肠井蛇绿岩的地球化学特征及形成环境[J]. 地质学报, 86(6): 961−971. doi: 10.3969/j.issn.0001-5717.2012.06.010 -
Access History
Figures(8)
Tables(3)
Export File
Citation
HU Xinzhuo, YANG Jiyuan, DENG Wen, TIAN Guanghao, SUN Xiao, QIN Danhe. 2024. The formation age, origin and tectonic environment of gneissic granite in Xiaohuangshan, Beishan area, Inner Mongolia. Geological Bulletin of China, 43(6): 1059-1071. doi: 10.12097/gbc.2022.02.018
Format
Content
DownLoad:
-
Figure 1.
Tectonic subdivisions and sutures (a) and geologic map (b) of the study area
-
Figure 2.
Outcrop and microscopic characteristics of gneissic granite rocks in Xiaohuangshan, Beishan area, Inner Mongolia
-
Figure 3.
QAP diagram (a) and TAS diagram (b) of gneissic granite in Xiaohuangshan, Beishan area, Inner Mongolia
-
Figure 4.
Zircon CL images and measurement points of gneissic granodiorite in Xiaohuangshan, Beishan area, Inner Mongolia (P7TW2)
-
Figure 5.
Zircon CL images and measurement points of gneissic fine-grained monzogranite in Xiaohuangshan, Beishan area, Inner Mongolia (TW12)
-
Figure 6.
U−Pb age concordance diagrams and weighted average age of gneissic granite in Xiaohuangshan, Beishan area, Inner Mongolia
-
Figure 7.
Primitive mantle-normalized spidergrams (a) and chondrite-normalized rare-earth elements patterns (b) of gneissic granite in the Xiaohuangshan of Beishan area, Inner Mongolia
-
Figure 8.
Illustration of the genetic types and tectonic environment of Early Silurian intrusive rocks