医巫闾山地区早白垩世同伸展花岗岩就位机制
Emplacement of Early Cretaceous syn-extension granitic in Yiwulüshan area, North China
-
摘要: 石山岩体形成的时间约为124Ma，是医巫闾山地区早白垩世NWW向伸展变形的同构造花岗岩体。花岗岩的主量、微量元素含量表现出埃达克质岩浆的特点，SiO2、Al2O3及碱性组分含量较高，而Fe2O3T和MgO含量较低，岩浆锆石εHf（t）值=-26.7~-20.3、tDM2=2.0~2.3Ga，表明岩浆来源于华北陆块加厚下地壳的部分熔融。通过对围岩变形组构与岩体中岩浆组构的分析，可将石山岩体的就位过程划分为三个阶段。在岩浆底劈、膨胀作用和围岩伸展滑移的共同影响下，石山岩体最终形成了主体呈近圆形、西部发育两个岩墙的形态。岩浆就位过程与围岩变形组构的相互关系，表明中、浅部地壳的伸展变形可以控制岩浆的就位过程和最终形态，但与下地壳部分熔融的关系不大，岩石圈减薄及区域伸展应力场是下地壳发生部分熔融的诱因。Abstract: The Shishan pluton formed at about 124Ma is the syn-tectonic granite of Early Cretaceous extension with NWW shear sense in Yiwulüshan area. The major and trace element of the granite shows the characteristics of adakites. The high concentration of SiO2, Al2O3, and alkaline content, and low Fe2O3T and MgO concentration, indicate the magma may be come from the partial melting of crustal rocks. In addition, the magmatic zircons have εHf(t) values from -26.7 to -20.3 and tDM2 are between 2.0Ga and 2.3Ga indicate the adakitic magma was derived by partial melting of the lower part of the thickened crust of North China block. The magma emplacement of Shishan pluton has three stages could be identified by the analyses of the deformed fabrics from wall rocks and magmatic fabrics from the granites. The Shishan pluton shows a horizontal shape with the subrotund outcrop at major part and two banded granitic dikes at western part, which is the result of diapirism and ballooning of magma and the stretched shear of wall rock. We suggest that the extension at shallow crust could control the emplacement and shape of the pluton. But the partial melting of lower crust has no direct relationship with the shallow extension, instead, the lithospheric thinning and the field of regionally extensional stress may be the cause of partial melting.
-
Key words:
- Emplacement /
- Extension /
- Petrogenesis /
- Metamorphic core complex /
- Yiwulüshan area /
- North China block
-
-
[1] Atherton MP and Petford N. 1993. Generation of sodium-rich magmas from newly underplated basaltic crust. Nature, 362(6416): 144-146
[2] Barbarin B. 1999. A review of the relationships between granitoid types, their origins and their geodynamic environments. Lithos, 46(3): 605-626
[3] Boynton WV. 1984. Geochemistry of the rare earth elements: Meteorite studies. In: Henderson P (ed.). Rare Earth Element Geochemistry. Amsterdam: Elsevier, 63-114
[4] Castillo PR, Janney PE and Solidum RU. 1999. Petrology and geochemistry of Camiguin island, southern Philippines: Insights to the source of adakites and other lavas in a complex arc setting. Contributions to Mineralogy and Petrology, 134(1): 33-51
[5] Castro A. 1987. On granitoid emplacement and related structures: A review. Geologische Rundschau, 76(1): 101-124
[6] Chen H, Xia QK and Ingrin J. 2015. Water content of the Xiaogulihe ultrapotassic volcanic rocks, NE China: Implications for the source of the potassium-rich component. Science Bulletin, 60(16): 1468-1470
[7] Chen L, Liu YS, Hu ZC, Gao S, Zong KQ and Chen HH. 2011. Accurate determinations of fifty-four major and trace elements in carbonate by LA-ICP-MS using normalization strategy of bulk components as 100%. Chemical Geology, 284(3-4): 283-295
[8] Darby BJ, Davis GA, Zhang XH, Wu FY, Wilde S and Yang JH. 2004. The newly discovered Waziyu metamorphic core complex, Yiwulü Shan, western Liaoning Province, Northeast China. Earth Science Frontiers, 11(3): 145-155
[9] Defant MJ and Drummond MS. 1990. Derivation of some modern arc magmas by melting of young subducted lithosphere. Nature, 347(6294): 662-665
[10] Du JJ, Ma YS, Zhao Y and Wang YB. 2007. SHRIMP U-Pb zircon dating of the Yiwulüshan granite in western Liaoning and its geological implications. Geology in China, 34(1): 26-33 (in Chinese with English abstract)
[11] Frost BR, Barnes CG, Collins WJ, Arculus RJ, Ellis DJ and Frost CD. 2001. A geochemical classification for granitic rocks. Journal of Petrology, 42(11): 2033-2048
[12] Huang XL, Xu YG, Lan JB, Yang QJ and Luo ZY. 2009. Neoproterozoic adakitic rocks from Mopanshan in the western Yangtze Craton: Partial melts of a thickened lower crust. Lithos, 112(3-4): 367-381
[13] Hutton DHW, Dempster TJ, Brown PE and Decker SD. 1990. A new mechanism of granite emplacement: Intrusion in active extensional shear zones. Nature, 343(6527): 452-455
[14] Johnson SE, Fletcher JM, Fanning CM, Vernon RH, Paterson SR and Tate MC. 2003. Structure, emplacement and lateral expansion of the San José tonalite pluton, Peninsular Ranges batholith, Baja California, México. Journal of Structural Geology, 25(11): 1933-1957
[15] Li G, Liu ZH, Xu ZY, Dong XJ, Sha Q, Wang WQ, Wang XA and Zhang C. 2010. Evidences of syn-extensional emplacement of Yiwulüshan pluton and its geological significance. Journal of Jilin University (Earth Science Edition), 40(4): 971-978 (in Chinese with English abstract)
[16] Li G, Liu ZH, Liu JL, Li YF, Xu ZY and Dong XJ. 2012. Formation and timing of the extensional ductile shear zones in Yiwulü mountain area, western Liaoning Province, North China. Science China (Earth Sciences), 55(5): 733-746
[17] Li G, Liu ZH, Xu ZY, Li SC, Dong XJ and Liu JL. 2013. Crustal thinning during Mesozoic extensional detachment faulting in the Yiwulüshan region, eastern North China Craton. International Geology Review, 55(6): 749-766
[18] Li G, Xu ZY, Liu ZH, Li YF, Li SC and Dong XJ. 2013. Early Cretaceous extension of the Yiwulüshan metamorphic core complex. Acta Petrologica Sinica, 29(3): 938-952 (in Chinese with English abstract)
[19] Lin W, Charles N, Chen Y, Chen K, Faure M, Wu L, Wang F, Li QL, Wang J and Wang QC. 2013a. Late Mesozoic compressional to extensional tectonics in the Yiwulüshan massif, NE China and their bearing on the Yinshan-Yanshan orogenic belt: Part Ⅱ: Anisotropy of magnetic susceptibility and gravity modeling. Gondwana Research, 23(1): 78-94
[20] Lin W, Faure M, Chen Y, Ji WB, Wang F, Wu L, Charles N, Wang J and Wang QC. 2013b. Late Mesozoic compressional to extensional tectonics in the Yiwulüshan massif, NE China and its bearing on the evolution of the Yinshan-Yanshan orogenic belt: Part Ⅰ: Structural analyses and geochronological constraints. Gondwana Research, 23(1): 54-77
[21] Liu JL, Davis GA, Ji M, Guan HM and Bai XD. 2008. Crustal detachment and destruction of the North China craton: Constraints from Late Mesozoic extensional structures. Earth Science Frontiers, 15(3): 72-81 (in Chinese with English abstract)
[22] Liu JL, Ji M, Xia HR, Liu ZH, Zhou YS, Yu XQ, Zhang HY and Cheng SH. 2009. Crustal-mantle detachment of the North China craton in Late Mesozoic: Rheological constraints. Acta Petrologica Sinica, 25(8): 1819-1829 (in Chinese with English abstract)
[23] Liu YS, Hu ZC, Gao S, Günther D, Xu J, Gao CG and Chen HH. 2008. In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard. Chemical Geology, 257(1-2): 34-43
[24] Ludwing KR. 2003. User's Manual for Isoplot/Ex Version3.0: A Geochronological Toolkit for Microsoft Excel. Berkeley: Berkeley Geochronology Center, Special Publication, 1-70
[25] Ma YS, Cui SQ, Wu GG, Wu ZH, Zhu DG, Li X and Feng XY. 1999. The structural feature of metamorphic core complex in Yiwulüshan Mountains, West Liaoning. Acta Geoscientia Sinica, 20(4): 385-391 (in Chinese with English abstract)
[26] Maniar PD and Piccoli PM. 1989. Tectonic discrimination of granitoids. Geological Society of American Bulletin, 101(5): 635-643
[27] Martin H. 1999. Adakitic magmas: Modern analogues of Archaean granitoids. Lithos, 46(3): 411-429
[28] Middlemost EAK. 1985. Magmas and magmatic rocks. London: Longman
[29] Peccerillo A and Taylor SR. 1976. Geochemistry of eocene calc-alkaline volcanic rocks from the Kastamonu area, Northern Turkey. Contributions to Mineralogy and Petrology, 58(1): 63-81
[30] Ramsay JG. 1989. Emplacement kinematics of a granite diapir: The Chindamora batholith, Zimbabwe. Journal of Structural Geology, 11(1-2): 191-209
[31] Schneider DA, Edwards MA, Kidd WSF, Zeitler PK and Coath CD. 1999. Early Miocene anatexis identified in the western syntaxis, Pakistan Himalaya. Earth and Planetary Science Letters, 167(3-4): 121-129
[32] Sun SS and McDonough WF. 1989. Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes. In: Saunders AD and Norry MJ (eds.). Magmatism in the Ocean Basins. Geological Society, London, Special Publication, 42(1): 313-345
[33] Turrillot P, Faure M, Martelet G, Chen Y and Augier R. 2011. Pluton-dyke relationships in a Variscan granitic complex from AMS and gravity modelling. Inception of the extensional tectonics in the South Armorican Domain (France). Journal of Structural Geology, 33(11): 1681-1698
[34] Vernon RH, Johnson SE and Melis EA. 2004. Emplacement-related microstructures in the margin of a deformed pluton: The San José tonalite, Baja California, México. Journal of Structural Geology, 26(10): 1867-1884
[35] Wang Q, Xu JF, Jian P, Bao ZW, Zhao ZH, Li CF, Xiong XL and Ma JL. 2006. Petrogenesis of adakitic porphyries in an extensional tectonic setting, Dexing, South China: Implications for the genesis of porphyry copper mineralization. Journal of Petrology, 47(1): 119-144
[36] Weinberg RF, Mark G and Reichardt H. 2009. Magma ponding in the Karakoram shear zone, Ladakh, NW India. Geological Society of America Bulletin, 121(1-2): 278-285
[37] Wu FY, Yang JH, Zhang YB and Liu XM. 2006. Emplacement ages of the Mesozoic granites in southeastern part of the western Liaoning Province. Acta Petrologica Sinica, 22(2): 315-325 (in Chinese with English abstract)
[38] Yan DP, Zhou MF, Zhao DG, Li JW, Wang GH, Wang CL and Qi L. 2011. Origin, ascent and oblique emplacement of magmas in a thickened crust: An example from the Cretaceous Fangshan adakitic pluton, Beijing. Lithos, 123(1-4): 102-120
[39] Yang JH, Wu FY, Shao JA, Wilde SA, Xie LW and Liu XM. 2006. Constraints on the timing of uplift of the Yanshan Fold and Thrust Belt, North China. Earth and Planetary Science Letters, 246(3-4): 336-352
[40] Yuan HL, Gao S, Dai MN, Zong CL, Günther D, Fontaine GH, Liu XM and Diwu CR. 2008. Simultaneous determinations of U-Pb age, Hf isotopes and trace element compositions of zircon by excimer laser-ablation quadrupole and multiple-collector ICP-MS. Chemical Geology, 247: 100-118
[41] Zhang BL, Zhu G, Jiang DZ, Chen Y and Hu ZQ. 2011. Evolution of the Yiwulüshan metamorphic core complex and Late Jurassic extensional event in the western Liaoning Province. Geological Review, 57(6): 779-798 (in Chinese with English abstract)
[42] Zhang SH, Zhao Y, Davis GA, Ye H and Wu F. 2014b. Temporal and spatial variations of Mesozoic magmatism and deformation in the North China Craton: Implications for lithospheric thinning and decratonization. Earth-Science Reviews, 131: 49-87
[43] Zhang XH, Mao Q, Zhang HF and Wilde SA. 2008. A Jurassic peraluminous leucogranite from Yiwulüshan, western Liaoning, North China craton: Age, origin and tectonic significance. Geological Magazine, 145(3): 305-320
[44] Zhang XH, Zhang HF, Jiang N and Wilde SA. 2010. Contrasting Middle Jurassic and Early Cretaceous mafic intrusive rocks from western Liaoning, North China craton: Petrogenesis and tectonic implications. Geological Magazine, 147(6): 844-859
[45] Zhang XH, Yuan LL and Wilde SA. 2014a. Crust/mantle interaction during the construction of an extensional magmatic dome: Middle to Late Jurassic plutonic complex from western Liaoning, North China Craton. Lithos, 205: 185-207
[46] 杜建军, 马寅生, 赵越, 王彦斌. 2007. 辽西医巫闾山花岗岩锆石SHRIMP U-Pb测年及其地质意义. 中国地质, 34(1): 26-33
[47] 李刚, 刘正宏, 徐仲元, 董晓杰, 沙茜, 王挽琼, 王兴安, 张超. 2010. 医巫闾山岩体同伸展侵位的证据及其地质意义. 吉林大学学报(地球科学版), 40(4): 971-978
[48] 李刚, 刘正宏, 刘俊来, 李永飞, 徐仲元, 董晓杰. 2012. 医巫闾山伸展型韧性剪切带的形成过程及年代学证据. 中国科学(地球科学), 42(6): 879-892
[49] 李刚, 徐仲元, 刘正宏, 李永飞, 李世超, 董晓杰. 2013. 医巫闾山变质核杂岩早白垩世伸展变形. 岩石学报, 29(3): 938-952
[50] 刘俊来, Davis GA, 纪沫, 关会梅, 白相东. 2008. 地壳的拆离作用与华北克拉通破坏: 晚中生代伸展构造约束. 地学前缘, 15(3): 72-81
[51] 刘俊来, 纪沫, 夏浩然, 刘正宏, 周永胜, 余心起, 张宏远, 程素华. 2009. 华北克拉通晚中生代壳-幔拆离作用: 岩石流变学约束. 岩石学报, 25(8): 1819-1829
[52] 马寅生, 崔盛芹, 吴淦国, 吴珍汉, 朱大岗, 李晓, 冯向阳. 1999. 医巫闾山变质核杂岩构造特征. 地球学报, 20(4): 385-391
[53] 吴福元, 杨进辉, 张艳斌, 柳小明. 2006. 辽西东南部中生代花岗岩时代. 岩石学报, 22(2): 315-325
[54] 张必龙, 朱光, 姜大志, 陈印, 胡召齐. 2011. 辽西医巫闾山变质核杂岩的形成过程与晚侏罗世伸展事件. 地质论评, 57(6): 779-798
-
计量
- 文章访问数: 4234
- PDF下载数: 4549
- 施引文献: 0
下载: