A Case Study of Barrovian Metamorphic Zone of Langzishan Formation of Northern Liaohe Group, Liaodong Peninsula
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摘要: 巴罗式递增变质带能为地壳增厚及造山作用带来全新的认识.为了解辽东半岛北辽河群浪子山组内巴罗式变质带的野外分布和变质特征，对本溪地区连山关-祁家堡巴罗式变质带进行了详细的野外调查和室内研究工作.野外填图表明，浪子山组巴罗式变质带由南向北可以分为黑云母带、石榴石带、十字石带和蓝晶石带.岩相学研究表明，蓝晶石带的蓝晶十字石榴云母片岩保存了3阶段的矿物组合：（1）进变质阶段（M1）矿物组合为Pl+Qz+Ms+Bt+Ctd+Chl±Grt；（2）峰期变质阶段（M2）以Ky+St+Grt+Bt+Ms+Qz+Pl+Ilm为特征；（3）退变质阶段以毛发状的矽线石（M3-1）和变斑晶边缘或裂隙处生长的绿泥石和绢云母为特征（M3-2）.相平衡模拟表明，蓝晶十字石榴云母片岩所经历的进变质和峰期变质温压条件分别为~440℃/~3.7 kbar，~670℃/~7.9 kbar，具有典型的顺时针P-T轨迹.变质锆石U-Pb定年结果得到蓝晶十字石榴云母片岩经历了~1.96 Ga的峰期变质作用；碎屑锆石U-Pb年龄分布于2 631~2 020 Ma，浪子山组蓝晶十字石榴云母片岩碎屑物源可能来自于太古宙基底（~2.5 Ga）和2.2~2.1 Ga的岩浆岩.结合前人研究资料表明，浪子山组巴罗式变质带所记录的P-T-t轨迹以及大量的逆冲推覆构造揭示了胶-辽-吉带在~1.96 Ga经历了与造山作用相关的地壳增厚过程.Abstract: Barrovian-type progressive metamorphism could lead to a new understanding of crustal thickening and orogenesis. We conduct a detailed field survey and indoor researches about the Barrovian metamorphic zone of the Lianshanguan-Qijiabao of the Benxi area, to understand better of field distribution and metamorphic characteristics of Barrovian metamorphic zone which is located at the Langzishan Formation of the North Liaohe Group in Liaodong Peninsula. The Barrovian metamorphic zone in the Langzishan Formation is divided into biotite zone, garnet zone, staurolite zone, kyanite zone from south to north, according to detailed field mapping. The analysis of petrography suggests kyanite-staurolite-garnet mica-schist of kyanite zone has three stages mineral assemblages:(1) Progressive metamorphic mineral assemblages (M1) are Pl+Qz+Ms+Bt+Ctd+Chl±Grt; (2) metamorphic peak (M2) is characterized by Ky+St+Grt+Bt+Ms+Qz+Pl+Ilm; (3) retrograde metamorphic stage mainly has trichoid sillimanite (M3-1) and chlorite and sericite around rims and cracks of porphyroblasts (M3-2). Phase equilibrium modeling shows metamorphic P-T of progressive metamorphic stage and peak stage of kyanite-staurolite-garnet mica-schist are respectively ~440 ℃/~3.7 kbar, ~670 ℃/~7.9 kbar, and the rock has a typical clockwise P-T path. The results of U-Pb geochronology of metamorphic zircons indicate kyanite-staurolite-garnet mica-schist has experienced peak metamorphism at ~1.96 Ga; these ages of U-Pb detrital zircons are scattered among 2 631-2 020 Ma, indicating the clastic sediments may be from an ancient Archean basement of ~2.5 Ga and magmatic rocks of 2.2-2.1 Ga. Combined with previous research data, the clockwise P-T-t path and thrusting nappe structure recorded by the Barrovian metamorphic zone of the Langzishan Formation represent Jiao-Liao-Ji belt has experienced crustal thickening produced by orogenesis around 1.96 Ga.
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图 1 华北克拉通大地构造划分图（据Zhao et al., 2005修改）
由西向东依次为孔兹岩带、中部造山带和胶-辽-吉带；图 2标注于此图
Fig. 1. Tectonic subdivision of the North China Craton (modified from Zhao et al., 2005)
图 2 丹东－本溪地质简图
图修改自辽宁省第一区域地质测量队二分队（1971）完成的中华人民共和国地质图1:20万辽阳幅K⁃51⁃XXVII；研究区（图 3a）位于红框内；样品D1034⁃6和18FLY12标记在图中
Fig. 2. Geological map of the Dandong-Benxi region
图 3 连山关－祁家堡地区巴罗式变质带分布（a）和该区域典型的巴罗式变质带剖面（b）
样品D1013、D1024⁃1和D1028⁃2标记在图a中.图a可见巴罗式变质作用呈由南向北递增的趋势，依次为黑云母带、石榴石带、十字石带和蓝晶石带；图b可见巴罗式变质带受逆冲推覆构造影响，呈叠瓦状分布
Fig. 3. The distribution of Barrovian metamorphic zone (a) in the Lianshanguan-Qijiabao and typical profile of Barrovian metamorphic zone in this area (b)
图 4 巴罗式变质带代表性的野外照片
a.黑云母带二云母片岩；b.石榴石带石榴云母片岩；c.十字石带十字石榴云母片岩；d.蓝晶石带蓝晶十字石榴云母片岩
Fig. 4. Representative field photos of Barrovian metamorphic zone
图 5 代表性巴罗式变质带的镜下照片
a.黑云母带特征及矿物组合；b.石榴石带特征及矿物组合；c.十字石带特征及矿物组合；d.蓝晶石带特征及矿物组合；e.蓝晶石带退变质现象；f.黑云母退变为绿泥石和毛发状矽线石
Fig. 5. Representative photomicrographs of Barrovian metamorphic zone
图 6 样品D1034-6石榴子石显微照片(a)、成分剖面示意图(b)和分析结果投图(c)
Fig. 6. Photomicrographs (a), chemical zoning profile (b) and analysis result plotting (c) of garnet of sample D1034-6
图 7 蓝晶十字石榴云母片岩（样品D1034-6）的P⁃T视剖面
峰期矿物组合被标红；所有区域都含有水和石英
Fig. 7. P⁃T pseudosection of kyanite-staurolite-garnet mica-schist (sample D1034-6)
图 9 蓝晶十字石榴云母片岩：(a)U-Pb谐和图；(b)年龄分布直方图；(c)变质锆石U-Pb谐和图；(d)加权平均年龄图
Fig. 9. The U-Pb concordia diagram (a), the age distributions diagram of Kyanite-staurolite-garnet-mica-schist (b); the U-Pb concordia diagram (c) and the weighted average diagram (d) of metamorphic zircons of kyanite-staurolite-garnet mica-schist
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[1] Ague, J. J., Baxter, E. F., 2007. Brief Thermal Pulses during Mountain Building Recorded by Sr Diffusion in Apatite and Multicomponent Diffusion in Garnet. Earth and Planetary Science Letters, 261(3-4):500-516. https://doi.org/10.1016/j.epsl.2007.07.017 [2] Barrow, G., 1912. On the Geology of Lower Dee-Side and the Southern Highland Border. Proceedings of the Geologists' Association, 23(5):274-290. https://doi.org/10.1016/s0016-7878(12)80018-6 [3] Baxter, E. F., Ague, J. J., Depaolo, D. J., 2002. Prograde Temperature-time Evolution in the Barrovian Type-Locality Constrained by Sm/Nd Garnet Ages from Glen Clova, Scotland. Journal of the Geological Society, 159(1):71-82. https://doi.org/10.1144/0016-76901013 [4] Bureau of Geology and Mineral Resources of Sichuan Province, 1991. Regional Geological Records of Sichuan Province. Geological Publishing House, Beijing (in Chinese). [5] Cai, J., Liu, F. L., Liu, P. H., et al., 2017. Discovery of Granulite-Facies Metamorphic Rocks in the Ji'an Area, Northeastern Jiao-Liao-Ji Belt, North China Craton:Metamorphic P-T Evolution and Geological Implications. Precambrian Research, 303:626-640. https://doi.org/10.1016/j.precamres.2017.08.018 [6] Chen, J. S., Jiang, Z. Q., Li, W. W., et al., 2018. The Formation Ages of the Langzishan and Lieryu Formations in Lianshanguan Area, Benxi, Liaoning Province, and Its Geological Significance. Geological Bulletin of China, 37(9):1693-1703(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTotal-ZQYD201809015.htm [7] England, P. C., Thompson, A. B., 1984. Pressure:Temperature:Time Paths of Regional Metamorphism Ⅰ. Heat Transfer during the Evolution of Regions of Thickened Continental Crust. Journal of Petrology, 25(4):894-928. https://doi.org/10.1093/petrology/25.4.894 [8] Guo, H. F., Wu, C. L., Wu, G. Y., 1989. Metamorphism of the Liaohe Group. Regional Geology of China, (1):46-51 (in Chinese with English abstract). [9] He, G. P., Ye, H. W., 1998. Two Types of Early Proterozoic Metamorphism and Its Tectonic Significance in Eastern Liaoning and Southern Jilin Areas. Acta Petrologica Sinica, 14(2):152-162 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-YSXB802.002.htm [10] Hu, Z. C., Zhang, W., Liu, Y. S., et al., 2015. "Wave" Signal-Smoothing and Mercury-Removing Device for Laser Ablation Quadrupole and Multiple Collector ICPMS Analysis:Application to Lead Isotope Analysis. Analytical Chemistry, 87(2):1152-1157. https://doi.org/10.1021/ac503749k [11] Huang, G. Y., Jiao, S. J., Guo, J. H., et al., 2016. P-T-t Constraints of the Barrovian-Type Metamorphic Series in the Khondalite Belt of the North China Craton:Evidence from Phase Equilibria Modeling and Zircon U-Pb Geochronology. Precambrian Research, 283:125-143. https://doi.org/10.1016/j.precamres.2016.07.011 [12] Junges, S. L., Pimentel, M. M., de Moraes, R., 2002. Nd Isotopic Study of the Neoproterozoic Mara Rosa Arc, Central Brazil:Implications for the Evolution of the Brası́lia Belt. Precambrian Research, 117(1-2):101-118. https://doi.org/10.1016/s0301-9268(02)00077-3 [13] Li, S. Z., Zhao, G. C., Sun, M., et al., 2005. Deformation History of the Paleoproterozoic Liaohe Assemblage in the Eastern Block of the North China Craton. Journal of Asian Earth Sciences, 24(5):659-674. https://doi.org/10.1016/j.jseaes.2003.11.008 [14] Li, S. Z., 1993. The Tectonic Style and the Relationship between Metamorphism and Deformation of Gaixian Formation in Liaohe Group in Yingkou Country, Liaoning Province, China (Dissertation). Jilin University, Changchun (in Chinese with English abstract). [15] Li, S. Z., Han, Z. Z., Liu, Y. J., et al., 2001. Continental Dynamics and Regional Metamorphism of the Liaohe Group. Geological Review, 47 (1):9-18 (in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dzlp200101002 [16] Liu, F. L., Liu, P. H., Wang, F., et al., 2015. Progress and Overviews of Voluminous Metasedimentary Series within the Paleoproterozoic Jiao-Liao-Ji Orogenic/Mobile Belt, North China Craton. Acta Petrologica Sinica, 31(10):2816-2846 (in Chinese with English abstract). http://www.cnki.com.cn/Article/CJFDTotal-YSXB201510002.htm [17] Liu, P. H., Liu, F. L., Tian, Z. H., et al., 2019. Petrological and Geochronological Evidence for Paleoproterozoic Granulite-Facies Metamorphism of the South Liaohe Group in the Jiao-Liao-Ji Belt, North China Craton. Precambrian Research, 327:121-143. https://doi.org/10.1016/j.precamres.2019.03.002 [18] Liu, P. H., Liu, F. L., Tian, Z. H., et al., 2017b. Metamorphic and Deformational History about Barrovian Metamorphisc Zone of North Liaohe Group in Liaoyang-Benxi Areas, Liaodong Peninsula: Implication to Paleoproterozoic Orogenesis of Jiao-Liao-Ji Belt. China Geoscience Joint Academic Conference in 2017, Beijing (in Chinese). [19] Liu, P. H., Cai, J., Zou, L., 2017a. Metamorphic P-T-t Path and Its Geological Implication of the Sanjiazai Garnet Amphibolites from the Northern Liaodong Peninsula, Jiao-Liao-Ji Belt:Constraints on Phase Equilibria and Zircon U-Pb Dating. Acta Petrologica Sinica, 33(9):2649-2674 (in Chinese with English abstract). [20] Liu, Y. J., Han, X. T., Liu, Z. H., et al., 2020. Zircon U-Pb Ages, Geochemical Characteristics and Geological Significance of Early Cretaceous Granites in Fengcheng Area, Eastern Liaoning Province. Earth Science, 44(10):3551-3564 (in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dqkx202001011 [21] Liu, Y. S., Gao, S., Hu, Z. C., et al., 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. Journal of Petrology, 51(1-2):537-571. https://doi.org/10.1093/petrology/egp082 [22] Lu, L. Z., Xu, X. C., Liu, F. L., 1996. Early Precambrian Khondalite Series in North China. Changchun Publishing House, Changchun (in Chinese). [23] Lu, X. P., Wu, F. Y., Guo, J. H., et al., 2006. Zircon U-Pb Geochronological Constraints on the Paleoproterozoic Crustal Evolution of the Eastern Block in the North China Craton. Precambrian Research, 146(3-4):138-164. https://doi.org/10.1016/j.precamres.2006.01.009 [24] Ludwig, K. R., 2003. ISOPLOT 3.0: A Geochronological Toolkit for Microsoft Excel. Berkeley Geochronology Center, Berkeley. [25] Luo, Y., Sun, M., Zhao, G. C., et al., 2004. LA-ICP-MS U-Pb Zircon Ages of the Liaohe Group in the Eastern Block of the North China Craton:Constraints on the Evolution of the Jiao-Liao-Ji Belt. Precambrian Research, 134(3-4):349-371. https://doi.org/10.1016/j.precamres.2004.07.002 [26] Luo, Y., Sun, M., Zhao, G. C., et al., 2008. A Comparison of U-Pb and Hf Isotopic Compositions of Detrital Zircons from the North and South Liaohe Groups:Constraints on the Evolution of the Jiao-Liao-Ji Belt, North China Craton. Precambrian Research, 163(3-4):279-306. https://doi.org/10.1016/j.precamres.2008.01.002 [27] Meng, E., Liu, F. L., Liu, P. H., et al., 2014. Petrogenesis and Tectonic Significance of Paleoproterozoic Meta-Mafic Rocks from Central Liaodong Peninsula, Northeast China:Evidence from Zircon U-Pb Dating and in Situ Lu-Hf Isotopes, and Whole-Rock Geochemistry. Precambrian Research, 247:92-109. https://doi.org/10.1016/j.precamres.2014.03.017 [28] Oliver, G. J. H., Chen, F., Buchwaldt, R., et al., 2000. Fast Tectonometamorphism and Exhumation in the Type Area of the Barrovian and Buchan Zones. Geology, 28(5):459-462. https://doi.org/10.1130/0091-7613(2000)28459:ftaeit>2.0.co; 2 doi: 10.1130/0091-7613(2000)28459:ftaeit>2.0.co;2 [29] Tam, P. Y., Zhao, G. C., Sun, M., et al., 2012. Metamorphic P-T Path and Tectonic Implications of Medium-Pressure Pelitic Granulites from the Jiaobei Massif in the Jiao-Liao-Ji Belt, North China Craton. Precambrian Research, 220-221:177-191. https://doi.org/10.1016/j.precamres.2012.08.008 [30] Tang, J., Zheng, Y. F., Wu, Y. B., et al., 2007. Geochronology and Geochemistry of Metamorphic Rocks in the Jiaobei Terrane:Constraints on Its Tectonic Affinity in the Sulu Orogen. Precambrian Research, 152(1-2):48-82. https://doi.org/10.1016/j.precamres.2006.09.001 [31] Tian, M. J., Li, D. Q., Li, B., et al., 2019. Geochemical Characteristics and Tectonic Significance of Granite from Nanfen Metamorphic Core Complexes in Liaoning. Earth Science, 44(10):3551-3564 (in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dqkx201910025 [32] Tian, Z. H., Liu, F. L., Windley, B. F., et al., 2017. Polyphase Structural Deformation of Low-To Medium-grade Metamorphic Rocks of the Liaohe Group in the Jiao-Liao-Ji Orogenic Belt, North China Craton:Correlations with Tectonic Evolution. Precambrian Research, 303:641-659. https://doi.org/10.1016/j.precamres.2017.08.017 [33] Wang, F., Liu, F. L., Schertl, H. P., et al., 2020. Detrital Zircon U-Pb Geochronology and Hf Isotopes of the Liaohe Group, Jiao-Liao-Ji Belt:Implications for the Paleoproterozoic Tectonic Evolution. Precambrian Research, 340:105633. https://doi.org/10.1016/j.precamres.2 020.105633 doi: 10.1016/j.precamres.2020.105633 [34] Wang, X. P., Peng, P., Wang, C., et al., 2017. Nature of Three Episodes of Paleoproterozoic Magmatism (2 180 Ma, 2 115 Ma and 1 890 Ma) in the Liaoji Belt, North China with Implications for Tectonic Evolution. Precambrian Research, 298:252-267. https://doi.org/10.1016/j.precamres.2017.06.003 [35] Weller, O. M., St-Onge, M. R., Waters, D. J., et al., 2013. Quantifying Barrovian Metamorphism in the Danba Structural Culmination of Eastern Tibet. Journal of Metamorphic Geology, 31(9):909-935. https://doi.org/10.1111/jmg.12050 [36] Woodsworth, G., 1977. Homogenization of Zoned Garnets from Pelitic Schists. Canadian Journal of Earth Sciences, 15:230-242. [37] Xu, W., Liu, F. L., Liu, P. H., et al., 2020a. Paleoproterozoic Transition in Tectonic Regime Recorded by the Eastern Block of the North China Craton:Evidence from Detrital Zircons of the Langzishan Formation, Jiao-Liao-Ji Belt. International Geology Review, 62(2):168-185. https://doi.org/10.1080/00206814.2019.1594413 [38] Xu, W., Liu, F. L., Wang, F., et al., 2020b. Palaeoproterozoic Tectonic Evolution of the Jiao-Liao-Ji Belt, North China Craton:Geochemical and Isotopic Evidence from Ca. 2.17 Ga Felsic Tuff. Geological Journal, 55(1):409-424. https://doi.org/10.1002/gj.3380 [39] Yang, M. C., Chen, B., Yan, C., 2015. Petrogenesis of Paleoproterozoic Gneissic Granites from Jiao-Liao-Ji Belt of North China Craton and Their Tectonic Implications. Journal of Earth Sciences and Environment, 37(5):31-51 (in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=xagcxyxb201505003 [40] Yin, A., Brandl, G., Kröner, A., 2020. Plate-Tectonic Processes at Ca. 2.0 Ga:Evidence from >600 km of Plate Convergence. Geology, 48(2):103-107. https://doi.org/10.1130/g47070.1 [41] Zhang, Q. S., Yang, Z. S., Liu, L. D., 1988. Early Crust and Mineral Deposits of Liaodong Peninsula, China. Geological Publishing House, Beijing (in Chinese) [42] Zhao, G. C., Sun, M., Wilde, S. A., et al., 2005. Late Archean to Paleoproterozoic Evolution of the North China Craton:Key Issues Revisited. Precambrian Research, 136(2):177-202. https://doi.org/10.1016/j.precamres.2004.10.002 [43] Zhuang, Y. X., 1994. Tectonothermal Evolution in Space and Time and Orogenic Process of Altaide, China. Science Tecnology Publishing House of Jilin, Changchun (in Chinese). [44] Zong, K. Q., Klemd, R., Yuan, Y., et al., 2017. The Assembly of Rodinia:The Correlation of Early Neoproterozoic (ca. 900 Ma) High-Grade Metamorphism and Continental Arc Formation in the Southern Beishan Orogen, Southern Central Asian Orogenic Belt (CAOB). Precambrian Research, 290:32-48. https://doi.org/10.1016/j.precamres.2016.12.010 [45] 四川省地质矿产局, 1991.四川省区域地质志.北京:地质出版社. [46] 陈井胜, 蒋职权, 李崴崴等, 2018.辽宁本溪连山关地区辽河群浪子山组、里尔峪组形成时代及其地质意义.地质通报, 37(9):1693-1703. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zgqydz201809014 [47] 郭洪方, 吴春林, 1989.辽河群变质作用.中国区域地质, (1):46-51. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK000004039185 [48] 贺高品, 叶慧文, 1998.辽东-吉南地区早元古代两种类型变质作用及其构造意义.岩石学报, 14(2):152-162. http://www.cnki.com.cn/Article/CJFDTotal-YSXB802.002.htm [49] 李三忠, 1993.营口地区辽河群盖县组的构造样式及变质变形研究(硕士学位论文).长春: 吉林大学. [50] 李三忠, 韩宗珠, 刘永江, 等, 2001.辽河群区域变质特征及其大陆动力学意义.地质论评, 47(1):9-18. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dzlp200101002 [51] 刘福来, 刘平华, 王舫, 等, 2015.胶-辽-吉古元古代造山/活动带巨量变沉积岩系的研究进展.岩石学报, 31(10):2816-2846. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=ysxb98201510002 [52] 刘平华, 蔡佳, 邹雷, 2017a.辽东半岛北部三家子石榴斜长角闪岩变质演化P-T-t轨迹及其地质意义:来自相平衡模拟与锆石U-Pb定年的约束.岩石学报, 33(9):2649-2674. http://d.wanfangdata.com.cn/Periodical/ysxb98201709001 [53] 刘平华, 刘福来, 田忠华, 等, 2017b.辽东半岛辽阳-本溪地区北辽河群巴罗型变质带变质变形历史: 对胶-辽-吉带古元古代造山作用过程的启示, 2017中国地球科学联合学术年会, 北京. [54] 刘永俊, 韩晓涛, 刘正宏, 等, 2020.辽东凤城地区早白垩世花岗岩的锆石U-Pb年龄、地球化学特征及地质意义.地球科学, 45(1):145-155. doi: 10.3799/dqkx.2018.278 [55] 卢良兆, 徐学纯, 刘福来, 1996.中国北方早前寒武纪孔兹岩系, 长春:长春出版社. [56] 田茂军, 李帝铨, 李斌, 等, 2019.辽宁南芬变质核杂岩核部花岗岩地球化学特征及构造意义.地球科学, 44(10):3551-3564. doi: 10.3799/dqkx.2018.299 [57] 杨明春, 陈斌, 闫聪, 2015.华北克拉通胶-辽-吉带古元古代条痕状花岗岩成因及其构造意义.地球科学与环境学报, 37(5):31-51. http://www.cnki.com.cn/Article/CJFDTotal-XAGX201505004.htm [58] 张秋生, 杨振升, 刘连登, 1988.辽东半岛早期地壳与矿床.北京:地质出版社. [59] 庄育勋, 1994.中国阿尔泰造山带热动力时空演化和造山过程.长春:吉林科学技术出版社. -
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