内蒙古北山地区小红山钒钛磁铁矿区双峰式侵入岩——岩石学、年代学、地球化学特征及其地质意义

doi:10.13686/j.cnki.dzyzy.2022.05.005

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (929 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Study on the petrology, zircon U-Pb chronology and whole-rock geochemistry of intrusive rocks in Xiaohongshan vanadium-titanium magnetite orefield of Beishan area in Inner Mongolia shows that the lithology of the intrusion is gabbro and granite with the diagenetic age of 431.1±2.4 Ma and 424.9±2.3 Ma respectively. The two types of rocks were formed at a similar time of the same tectono-magmatism event. The SiO₂ content in the intrusive rocks shows double peaks, and the characteristics of rare earth and trace elements indicate that they have the geochemical features of island-arc magmatic rocks, with the source area metasomatized by subduction-related fluid. The geochemical characteristics reflect Xiaohongshan granite is originated from the partial melting of lower crust materials at high temperature while the gabbros resulted from the partial melting of enriched mantle. Combined with the regional geological background and tectonic discrimination, it is concluded that the Middle and Late Silurian bimodal magmatic assemblage in Xiaohongshan area is the product of continental margin extension induced by the southward subduction of Beishan ocean.

Key words： Beishan orogenic belt vanadium-titanium magnetite bimodal intrusive rock zircon U-Pb chronology active continental margin Inner Mongolia

Received: 03 September 2021

PACS:	P588.1
	P597

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	PAN Zhi-long
	LI Qiang
	CHENG Xue-qin
	WANG Shuo

Cite this article:

PAN Zhi-long,LI Qiang,CHENG Xue-qin等. BIMODAL INTRUSIVE ROCKS IN XIAOHONGSHAN VANADIUM-TITANIUM MAGNETITE OREFIELD IN BEISHAN AREA OF INNER MONGOLIA: Petrology, Geochronology, Geochemistry and Geological Implication[J]. GEOLOGY AND RESOURCES, 2022, 31(5): 614-624.

URL:

http://manu25.magtech.com.cn/Jweb_dzyzy/EN/10.13686/j.cnki.dzyzy.2022.05.005 OR http://manu25.magtech.com.cn/Jweb_dzyzy/EN/Y2022/V31/I5/614

[1]	Chen C, Teng X J, Pan Z L, et al. LA-ICP-MS zircon U-Pb age of A-type granite from the Shibanjing area of middle Beishan orogenic belt, Inner Mongolia, and its constraint on closure time of Beishan Ocean[J]. Geological Bulletin of China, 2020, 39(9): 1448-1460. 陈超, 滕学建, 潘志龙, 等. 内蒙古北山造山带中段石板井地区A型花岗岩锆石U-Pb年龄及对北山洋闭合时间的限定[J]. 地质通报, 2020, 39(9): 1448-1460.
[2]	Yan Z, Jin H K, Fan Z. Discussion about geological characteristics of vanadium-titanium magnetite and its causes of formation in Xiaohongshan of Inner Mongolia[J]. Non-Ferrous Mining and Metallurgy, 2009, 25 (2): 10-11, 9. 严忠, 金海宽, 范泽. 内蒙古小红山钒钛磁铁矿地质特征及成因探讨[J]. 有色矿冶, 2009, 25(2): 10-11, 9.
[3]	Yang F X, Li W M, Chen D, et al. Discussion on the deposit features and genetic characteristics of vanadium-titanium magnetite ore in Xiaohongshan, western Inner Mongolia[J]. Northwestern Geology, 2010, 43(3): 66-74. 杨福新, 李为民, 陈岱, 等. 内蒙古小红山钒钛磁铁矿床成矿特征及成因探讨[J]. 西北地质, 2010, 43(3): 66-74.
[4]	Yang J G, Wang L, Wang X H, et al. SHRIMP zircon U-Pb dating of the Xiaohongshan vanadium-titanium magnetite deposit, Ejin Banner, Beishan, Inner Mongolia, and its geological implications[J]. Geological Bulletin of China, 2015, 34(9): 1699-1705. 杨建国, 王磊, 王小红, 等. 内蒙古北山额济纳旗小红山钒钛磁铁矿床SHRIMP锆石U-Pb定年及其意义[J]. 地质通报, 2015, 34 (9): 1699-1705.
[5]	Zhang G P, Xie G C, Zhao H S, et al. The diagenetic mineralization process of the Xiaohongshan vanadium-bearing titanometite in the Beishan area of Inner Mongolia[J]. Northwestern Geology, 2017, 50 (1): 63-77. 张国鹏, 谢春林, 赵寒森, 等. 内蒙古北山地区小红山钒钛磁铁矿成岩成矿过程探讨[J]. 西北地质, 2017, 50(1): 63-77.
[6]	Wang S, Pan Z L, Zhang H, et al. Geochemical characteristics and geological significance of ore-bearing rocks in Xiaohongshan Vanadium-titanium magnetite deposit, Inner Mongolia[J]. Western Resources, 2017(3): 172-173. (in Chinese) 王硕, 潘志龙, 张欢, 等. 内蒙古小红山钒钛磁铁矿赋矿岩石的地球化学特征及其地质意义[J]. 西部资源, 2017(3): 172-173.
[7]	Pan Z L, Zhang H, Chen C, et al. Zircon U-Pb geochronology and Lu-Hf isotope compositions of porphyritic syenite granite from Aobaohuturen in Beishan, Inner Mongolia and its tectonic implication [J]. Chinese Journal of Geology, 2017, 52(1): 301-316. 潘志龙, 张欢, 陈超, 等. 内蒙古北山敖包呼图仁斑状正长花岗岩锆石U-Pb年龄、Lu-Hf同位素组成及其地质意义[J]. 地质科学, 2017, 52(1): 301-316.
[8]	Hao Z Y, Gao J, Wang C, et al. LA-ICP-MS zircon U-Pb dating and tectonic setting of the monzogranites in the Fengleishan area of Beishan orogenic belt, Inner Mongolia[J]. Geology in China, 2020, 47(4): 1204-1219. 郝增元, 高鉴, 王晨, 等. 北山造山带风雷山地区二长花岗岩LA-ICP-MS锆石U-Pb年龄及其构造背景[J]. 中国地质, 2020, 47 (4): 1204-1219.
[9]	Niu W C, Xin H T, Duan L F. The identification and subduction polarity of the Baiheshan ophiolite mélanges belt in the Beishan area, Inner Mongolia: New understanding based on the geological map of Qinghegou Sheet (1∶ 50000)[J]. Geology in China, 2019, 46(5): 977-994. 牛文超, 辛后田, 段连峰, 等. 内蒙古北山地区百合山蛇绿混杂岩带的厘定及其洋盆俯冲极性——基于1∶ 5万清河沟幅地质图的新认识[J]. 中国地质, 2019, 46(5): 977-994.
[10]	Ren B F, Duan L F, Li M, et al. Geochronological and geochemical dataset of Late Paleozoic granitoids in the Hazhu area of Beishan, Inner Mongolia[J]. Geology in China, 47(S1): 40-49. 任邦方, 段连峰, 李敏, 等. 内蒙古北山哈珠地区晚古生代花岗岩类年代学与地球化学测试数据集[J]. 中国地质, 2020. 47(S1): 40-49.
[11]	Liu Y S, Gao S, Hu Z C, et al. 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, 2010, 51(1/2): 537-571.
[12]	Rudnick R L, Gao S. Composition of the continental crust[C]// Holland D, Turekian K K. Treatise on Geochemistry. Amsterdam: Elsevier, 2003, 3: 1-64.
[13]	Leat P T, Livermore R A, Millar I L, et al. Magma supply in back-arc spreading centre segment E2, East Scotia Ridge[J]. Journal of Petrology, 2000, 41(6): 845-866.
[14]	Wang Z Q. Geochemical characteristics, ages and geological significance of Triassic Chalageng composite granite in the Lancai area, Tongren County of the west Qinling orogenic belt[D]. Fuzhou: Fuzhou University, 2018. 王治淇. 西秦岭同仁县兰采地区三叠纪擦拉更复式花岗岩地球化学特征、时代及其地质意义[D]. 福州: 福州大学, 2018.
[15]	Sun S S, McDonough W F. Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes [C]//Saunders A D, Norry M J. Magmatism in the Ocean Basins. Geological Society, London, Special Publications, 1989, 42(1): 313-345.
[16]	Taylor S R, McLennan S M. The continental crust: Its composition and evolution[M]. Oxford: Blackwell, 1985.
[17]	Fretzdorff S, Livermore R A, Devey C W, et al. Petrogenesis of the back-arc East Scotia Ridge, South Atlantic Ocean[J]. Journal of Petrology, 2002, 43(8): 1435-1467.
[18]	Wu Y H, Liu B, Han B F, et al. Zircon U-Pb geochronology and geochemistry of Cambrian plutons in Xinglong area of Northern Da-Hinggan Mountains: Implications for tectonic evolution[J]. Earth Science, 2019, 44(10): 3346-3360. 吴宜翰, 刘博, 韩宝福, 等. 大兴安岭北部兴隆地区寒武纪侵入岩锆石U-Pb年代学、地球化学及其构造意义[J]. 地球科学, 2019, 44(10): 3346-3360.
[19]	Yang X P, Tian F Y, Wang S, et al. Geochronological and geochemical characteristics of analogy high-magnesium andesite in Henluanshan Formation of Inner Mongolia[J]. Geological Survey of China, 2018, 5 (5): 58-65. 杨鑫朋, 田粉英, 王硕, 等. 内蒙古横峦山组类高镁安山岩年代学及地球化学特征[J]. 中国地质调查, 2018, 5(5): 58-65.
[20]	Li S K, Zhang S T, Zhao Q H, et al. Zircon U-Pb chronology and petrogeochemistry of Cenozoic alkali-rich porphyry in Zaojiaochang, Lanping, Western Yunnan[J]. Journal of Jilin University (Earth Science Edition), 2021, 51(1): 169-184. 李守奎, 张世涛, 赵庆红, 等. 滇西兰坪皂角场新生代富碱斑岩体锆石U-Pb年代学及岩石地球化学特征[J]. 吉林大学学报(地球科学版), 2021, 51(1): 169-184.
[21]	Wilson M. Igneous petrogenesis: A global tectonic approach[M]. Dordrecht: Springer, 1989: 1-446.
[22]	Perfit M R, Gust D A, Bence A E, et al. Chemical characteristics of island-arc basalts: Implications for mantle sources[J]. Chemical Geology, 1980, 30(3): 227-256.
[23]	Hergt J M, Peate D W, Hawkesworth C J. The petrogenesis of Mesozoic Gondwana low-Ti flood basalts[J]. Earth and Planetary Science Letters, 1991, 105(1/3): 134-148.
[24]	Yun J. Petrogenesis and the tectonic setting of the Lower Paleozoic volcanic rocks in the Northern Belt of West Kunlun[D]. Beijing: China University of Geosciences (Beijing), 2015. 贠杰. 西昆仑北带晚古生代火山岩成因及构造背景研究[D]. 北京: 中国地质大学(北京), 2015.
[25]	Atherton M P, Petford N. Generation of sodium-rich magmas from newly underplated basaltic crust[J]. Nature, 1993, 362(6416): 144-146.
[26]	Rapp R P, Watson E B. Dehydration melting of metabasalt at 8-32 kbar: Implications for continental growth and crust-mantle recycling [J]. Journal of Petrology, 1995, 36(4): 891-931.
[27]	Rapp R P, Shimizu N, Norman M D, et al. Reaction between slab-derived melts and peridotite in the mantle wedge: Experimental constraints at 3.8 GPa[J]. Chemical Geology, 1999, 160(4): 335-356.
[28]	Li Q, Cheng X Q, Chen W, et al. Discovery of Early-Middle Triassic andesite in Erguna Massif and its indication of southward subduction of Mongol-Okhotsk Ocean Plate[J]. Earth Science, 2021, 46(8): 2768-2785. 李强, 程学芹, 陈伟, 等. 额尔古纳地块早—中三叠世安山岩的发现及其对蒙古-鄂霍茨克洋南向俯冲的指示[J]. 地球科学, 2021, 46(8): 2768-2785.