Citation: | WANG Jinfang, LI Yingjie, LI Hongyang, DONG Peipei. Post-orogeny of the Hegenshan suture zone: Zircon U-Pb age and geochemical constraints from volcanic rocks of the Manketouebo Formation[J]. Geological Bulletin of China, 2019, 38(9): 1443-1454. |
Based on field geological survey, petrology, geochemistry and LA-ICP-MS zircon U-Pb geochronology of the Baiyinrui volcanic rocks of the Manketouebo Formation exposed in the Meilaotewula SSZ-type ophiolite of the Hegenshan suture zone in Xi Ujimqin Banner of Inner Mongolia, this paper discusses the petrogenesis and tectonic setting of the volcanic rocks and post-orogeny of the Hegenshan suture zone. Petrogeochemical studies show that the volcanic rocks of the Manketouebo Formation in Baiyinrui area are mainly rhyolite with high SiO2, K2O and Na2O+K2O content, higher Ga/Al ratio and relatively poor CaO, MgO, Sr, Ba, Eu, Ti and P content. The REE content is relatively low. The REE distribution curve exhibits weak right-inclined gull-wing distribution. Petrological and geochemical characteristics show that the rhyolite of the Manketouebo Formation in this area is of Atype rhyolite origin, formed in post-orogenic extensional tectonic setting, and is a product of post-orogenic A-type magmatism, reflecting post-orogenic extensional process. The results of LA-ICP-MS zircon U-Pb isotope dating show that the rhyolite was formed at 158.0±0.7Ma, indicating that the rhyolite of the Manketouebo Formation erupted in the Late Jurassic, reflecting the Late Jurassic post-orogenic A-type magmatism event in the Hegenshan suture zone. Combined with the study of the time and space evolution of the Carboniferous ophiolites, Carboniferous-Permian island arc magmatic rocks and Middle Triassic-Early Cretaceous post-orogenic A-type magmatic rocks in the Erenhot-Hegenshan suture zone, it is considered that the Erenhot-Hegenshan suture zone underwent the evolution stage and dynamic process of post-orogenic extension during the Middle Triassic-Early Cretaceous after the final suture stretching in the Late Permian-Early Triassic.
[1] | 梁日暄.内蒙古中段蛇绿岩特征及地质意义[J].中国区域地质, 1994, (1):37-45. |
[2] | 陈斌, 赵国春, Wilde S A.内蒙古苏尼特左旗南两类花岗岩同位素年代学及其构造意义[J].地质论评, 2001, 47(4):361-367. doi: 10.3321/j.issn:0371-5736.2001.04.005 |
[3] | Miao L C, Fan W M, Liu D Y, et al. Geochronology and geochemistry of the Hegenshan ophiolitic complex:Implications for late-stage tectonic evolution of the Inner Mongolia-Daxinganling Orogenic Belt, China[J]. Journal of Asian Earth Sciences, 2008, 32(5/6):348-370. |
[4] | 刘建峰, 迟效国, 张兴洲, 等.内蒙古西乌旗南部石炭纪石英闪长岩地球化学特征及其构造意义[J].地质学报, 2009, 83(3):365-376. |
[5] | Chen B, Jahn B M, Tian W.Evolution of the Solonker suture zone constraints from U-Pb ages, Hf isotopic ratios and zircon wholrock Nd, Sr isotope compositions of subduction-and collisionrelated magmas and forearc sediments[J]. Journal of Asian Earth Sciences, 2009, 34:245-257. doi: 10.1016/j.jseaes.2008.05.007 |
[6] | 李英杰, 王金芳, 李红阳, 等.内蒙古西乌旗迪彦庙蛇绿岩的识别[J].岩石学报, 2012, 28(4):1282-1290. |
[7] | Liu J F, Li J Y, Chi X G, et al. A late-Carboniferous to early earlyPermian subduction-accretion complex in Daqing pasture, southeastern Inner Mongolia:Evidence of northward subduction beneath the Siberian paleoplate southern margin[J]. Lithos, 2013, 177(2):285-296. |
[8] | 李英杰, 王金芳, 李红阳, 等.内蒙西乌旗白音布拉格蛇绿岩地球化学特征[J].岩石学报, 2013, 29(8):2719-2730. |
[9] | Zhang Z C, Li K, Li J F, et al. Geochronology and geochemistry of the eastern Erenhot ophiolitic complex:Implications for the tectonic evolution of the Inner Mongolia-Daxinganling Orogenic Belt[J]. Journal of Asian Earth Sciences, 2015, 97(Part B):279-293. |
[10] | 李英杰, 王金芳, 李红阳, 等.内蒙古西乌旗梅劳特乌拉蛇绿岩的识别[J].岩石学报, 2015, 31(5):1461-1470. |
[11] | 康健丽, 肖志斌, 王惠初.内蒙古锡林浩特早石炭世构造环境:来自变质基性火山岩的年代学和地球化学证据[J].地质学报, 2016, 90(2):383-397. doi: 10.3969/j.issn.0001-5717.2016.02.014 |
[12] | 王金芳, 李英杰, 李红阳, 等.贺根山缝合带白音呼舒奥长花岗岩锆石U-Pb年龄、地球化学特征及构造意义[J].地质论评, 2019, 65(4):857-872. |
[13] | 王金芳, 李英杰, 李红阳, 等.内蒙古梅劳特乌拉蛇绿岩中埃达克岩的发现及其演化模式[J].地质学报, 2017, 91(8):1776-1795. doi: 10.3969/j.issn.0001-5717.2017.08.009 |
[14] | 王金芳, 李英杰, 李红阳, 等.内蒙古梅劳特乌拉蛇绿岩中早二叠世高镁闪长岩的发现及洋内俯冲作用[J].中国地质, 2018, 45(4):706-719. |
[15] | 王金芳, 李英杰, 李红阳, 等.内蒙古乌兰沟埃达克岩锆石U-Pb年龄及构造环境[J].地质通报, 2018, 37(10):1933-1943. |
[16] | Li Y J, Wang G H, Santosh M, et al. Supra-subduction zone ophiolites from Inner Mongolia, North China:Implications for the tectonic history of the southeastern Central Asian Orogenic Belt[J]. Gondwana Research, 2018, 59:126-143. doi: 10.1016/j.gr.2018.02.018 |
[17] | 石玉若, 刘敦一, 张旗, 等.内蒙古中部苏尼特左旗地区三叠纪A型花岗岩锆石SHRIMP U-Pb年龄及其区域构造意义[J].地质通报, 2007, 26(2):183-189. doi: 10.3969/j.issn.1671-2552.2007.02.009 |
[18] | 程天赦, 杨文静, 王登红.内蒙古西乌旗阿鲁包格山A型花岗岩锆石U-Pb年龄、地球化学特征及地质意义[J].大地构造与成矿学, 2014, 38(3):718-728. |
[19] | 薛富红, 张晓晖, 邓江夏, 等.内蒙古中部达来地区晚侏罗世A型花岗岩:地球化学特征、岩石成因与地质意义[J].岩石学报, 2015, 31(6):1774-1788. |
[20] | 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(6):47-58. doi: 10.3969/j.issn.1672-6561.2015.06.005 |
[21] | 王金芳, 李英杰, 李红阳, 等.内蒙古西乌旗努和特早白垩世A型花岗岩LA-ICP-MS锆石U-Pb年龄及其地质意义[J].地质通报, 2017, 36(8):1343-1358. doi: 10.3969/j.issn.1671-2552.2017.08.005 |
[22] | 王金芳, 李英杰, 李红阳, 等.内蒙古西乌旗德勒哈达早白垩世A型花岗岩形成时代:锆石U-Pb定年证据[J].中国地质, 2018, 45(1):197-198. |
[23] | 张晓晖, 张宏福, 汤艳杰, 等.内蒙古中部锡林浩特-西乌旗早三叠世A型酸性火山岩的地球化学特征及其地质意义[J].岩石学报, 2006, 22(11):2769-2780. |
[24] | 洪大卫, 黄怀曾, 肖宜君, 等.内蒙古中部二叠纪碱性花岗岩及其地球动力学意义[J].地质学报, 1994, 68(3):219-230. doi: 10.3321/j.issn:0001-5717.1994.03.001 |
[25] | Xiao W J, Windley B F, Hao J. Accretion leading to collision and the Permian Solonker suture, Inner Mongolia, China:Termination of the central Asian orogenic belt[J].Tectonics, 2003, 22(6):1069-1089. |
[26] | Shang Q H. The discovery and significance of Permian radiolarians Northern Orogenic belt in the northern and middle lnner Mongolia[J]. Chinese Science Bulletin, 2004, 49:2574-2579. doi: 10.1360/csb2004-49-24-2574 |
[27] | Windley B F, Alexeiev D, Xiao W J, et al. Tectonic models for accretion of the Central Asian Orogenic Belt[J].Journal of the Geological Society, 2007, 164(1):31-47. doi: 10.1144/0016-76492006-022 |
[28] | Xiao W J, Windley B F, Huang B C. End-Permian to midTriassic termination of the accretionary processes of the southern Altaids; implications for the geodynamic evolution, Phanerozoic continental growth, and metallogeny of Central Asia[J].Int. J. Earth Sci., 2009, 98:1189-1217. doi: 10.1007/s00531-008-0407-z |
[29] | Jian P, Liu D Y, Kröner A, et al. Evolution of a Permian intraoceanic arc-trench system in the Solonker suture zone, Central Asian orogenic Belt, China and Mongolia[J]. Lithos, 2010, 118:169-190. doi: 10.1016/j.lithos.2010.04.014 |
[30] | 江小均, 柳永清, 彭楠, 等.内蒙古克什克腾旗广兴源复式岩体SHRIMP U-Pb定年及地质意义讨论[J].地质学报, 2011, 85(1):114-128. |
[31] | 刘建峰, 李锦轶, 迟效国, 等.内蒙古东南部早三叠世花岗岩带岩石地球化学特征及其构造环境[J].地质学报, 2014, 88(9):1677-1690. |
[32] | 邵济安, 田伟, 唐克东, 等.内蒙古晚石炭世高镁玄武岩的成因和构造背景[J].地学前缘, 2015, 22(5):171-181. |
[33] | 田树刚, 李子舜, 张永生, 等.内蒙东部及邻区晚石炭世-二叠纪构造古地理环境及演变[J].地质学报, 2016, 90(4):688-707. doi: 10.3969/j.issn.0001-5717.2016.04.007 |
[34] | 李钢柱, 王玉净, 李成元.内蒙古索伦山蛇绿岩带早二叠世放射虫动物群的发现及其地质意义[J].科学通报, 2017, 62(5):400-406. |
[35] | 王金芳, 李英杰, 李红阳, 等.内蒙古西乌旗石匠山晚侏罗世-早白垩世A型花岗岩锆石U-Pb年龄及构造环境[J].地质通报, 2018, 37(2/3):382-396. |
[36] | Anderson T. Correction of commen lead U-Pb analyses that do not report 204Pb[J]. Chemical Geology, 2002, 192:59-79. doi: 10.1016/S0009-2541(02)00195-X |
[37] | Claesson S, Vetrin V, Bayanova T. U-Pb zircon age from a Devonian carbonatite dyke, Kola peninsula, Russia:A record of geological evolution from the Archaean to the Palaeozoic[J]. Lithos, 2000, 51:95-108. doi: 10.1016/S0024-4937(99)00076-6 |
[38] | Corfu F, Hanchar J M, Hoskin P W O. Atlas of Zircon Textures[J]. Reviews in Mineralogy&Geochemistry, 2003, 53(1):469-500. |
[39] | Peccerillo A, Taylor S R. Geochemistry of eocene calc-alkaline volcanic rocks from the Kastamonu Area, NorthernTurkey[J]. Contributions to Mineralogy and Petrology, 1976, 58:63-81. doi: 10.1007/BF00384745 |
[40] | 吴锁平, 王梅英, 戚开静. A型花岗岩研究现状及其述评[J].岩石矿物学杂志, 2007, (1):57-66. doi: 10.3969/j.issn.1000-6524.2007.01.009 |
[41] | Boynton W V. Geochemistry of the rare earth elements: meteorite studies[C]//Henderson P. Rare earth element geochemistry. Elsevier, 1984: 63-114. |
[42] | Eby G N. Chemical subdivision of the A-type granitoids:Petrogenetic and tectonic implications[J]. Geology, 1992, 20:641-644. doi: 10.1130/0091-7613(1992)020<0641:CSOTAT>2.3.CO;2 |
[43] | Sun S S, McDonough W F. Chemical and isotope systematics of oceanic basalts:implications for mantle composition and processes[J]. Geological Society of London, Special Publication, 1989, 42:313-345. doi: 10.1144/GSL.SP.1989.042.01.19 |
[44] | Loiselle M C, Wones D R. Characteristics and origin of anorogenic granites[J]. Geol. Soc. Am. Abstracts, 1979, 11:468. |
[45] | Collins W J, Beams S D, White A J R, et al. Nature and origin of A-type granites with particular reference to Southeastern Australia[J]. Contributions to Mineralogy and Petrology, 1982, 80:189-200. doi: 10.1007/BF00374895 |
[46] | Whalen J B, Currie K, Chappel B W. A-type granite:geochemical characteristics, discrimination and petrogenesis[J]. Contributions to Mineralogy and Petrology, 1987, 95:407-419. doi: 10.1007/BF00402202 |
[47] | Eby G N. The A-type granitoids:a review of their occurrence and chemical characteristics and speculation on their petrogenesis[J]. Lithos, 1990, 26:115-134. doi: 10.1016/0024-4937(90)90043-Z |
[48] | Bonin B. A-type granites and related rocks:Evolution of a concept, problems and prospects[J]. Lithos, 2007, 97:1-29. doi: 10.1016/j.lithos.2006.12.007 |
[49] | King P L, White A J R, Chappell B W, et al. Characterization and origin of aluminous A-type granites from the Lachlan Fold Belt, Southeastern Australia[J]. J. Petrol., 1997, 38(3):371-391. doi: 10.1093/petroj/38.3.371 |
[50] | 许保良, 阎国翰, 张臣. A型花岗岩的岩石学亚类及其物质来源[J].地学前缘, 1998, 5(3):113-124. doi: 10.3321/j.issn:1005-2321.1998.03.011 |
[51] | 邱检生, 王德滋, 蟹泽聪史, 等.福建沿海铝质A型花岗岩的地球化学及岩石成因[J].地球化学, 2000, 29(4):313-321. |
[52] | Maniar P D, Piccoli P M. Tectonic discrimination of granitoids[J]. Bulletin of the Geological Society of America, 1989, 101:635-643. doi: 10.1130/0016-7606(1989)101<0635:TDOG>2.3.CO;2 |
[53] | Pearce J A, Lippard S J, Roberts S. Characteristics and tectonic significance of supra-subduction zone ophiolites[C]//Kokelaar B P, Howells M F. Marginal Basin Geology[J]. Geological Society of London Special Publication, 1984, 16: 77-94. |
[54] | De La Roche H, Leteeeier J, Grande Claude P. A classification of volcanic and plutonic rocks using R1-R2 diagrams and major element analyses-Its relationships and current nomemclature[J]. Chem. Geol., 1980, 29:183-210. doi: 10.1016/0009-2541(80)90020-0 |
[55] | Wang J F, Li Y J, Li H Y. Zircon LA-ICP-MS U-Pb Age and Island-Arc Origin of the Bayanhua Gabbro in the Hegenshan Suture Zone, Inner Mongolia[J]. Acta Geologica Sinica, 2017, 91(6):2316-2317. doi: 10.1111/1755-6724.13470 |
[56] | Li Y J, Wang J F, Wang G H, et al. Discovery of the Plagiogranites in the Diyanmiao Ophiolite, Southeastern Central Asian Orogenic Belt, Inner Mongolia, China and Its Tectonic Significance[J].Acta Geologica Sinica, 2018, .92(02):568-585. doi: 10.1111/1755-6724.13543 |
[57] | 李英杰, 王金芳, 王根厚, 等.内蒙古迪彦庙蛇绿岩带达哈特前弧玄武岩的发现及其地质意义[J].岩石学报, 2018, 34(2):469-482. |
Sketch tectonic map (a) and geological map (b) of volcanic rocks of the Manketouebo Formation in Baiyinrui area, Inner Mongolia
Representative field photos (a, b) and photomicrograph (c, d) of the rhyolites in the Manketouebo Formation
Cathodoluminescence images and 206Pb/238U ages of zircons from the rhyolite in the Manketouebo Formation
U-Pb concordia diagram (a) and 206Pb/238U age histogram (b) of zircons from the rhyolite in the Manketouebo Formation
Total alkali versus silica (TAS) diagram of the rhyolites in the Manketouebo Formation
SiO2-K2O classification diagram of the rhyolites in the Manketouebo Formation
Chondrite-normalized REE patterns of the rhyolites in the Manketouebo Formation
Primitive mantle-normalized trace element spider diagram of the rhyolites in the Manketouebo Formation
K2O+Na2O)(a), (K2O+Na2O)/CaO(b), K2O/MgO(c) and TFeO/MgO(d) versus 10000×Ga/Al discrimination diagrams of the rhyolites in the Manketouebo Formation
K2O-Na2O (a) and SiO2-Zr (b) plots of the rhyolites in the Manketouebo Formation
Y-Nb-Ce (a) and Y-Nb-3Ga (b) triangular plots for distinguishing between A1 and A2 granitoids from the rhyolites in the Manketouebo Formation
SiO2-Al2O3 (a) and SiO2-TFeO/(TFeO+MgO) (b) tectonic discriminant diagrams of the rhyolites in the Manketouebo Formation
(Y+Nb)-Rb (a) and Y-Nb (b) tectonic discriminant diagrams of the rhyolites in the Manketouebo Formation
R2-R1 tectonic discriminant diagram of the rhyolites in the Manketouebo Formation