辽宁盘岭矿集区花岗岩锆石SHRIMP U-Pb年龄、Hf同位素组成及地质意义

doi:10.13278/j.cnki.jjuese.201705108

摘要/Abstract

摘要： 辽宁盘岭矿集区产出在辽吉裂谷中段的草河口—草河城—黑峪一带，是一处典型的古元古代沉积盆地和多金属矿集区。矿区内发育有早白垩世的北大砬子岩体和古元古代高丽墩台岩体，与本区的矿化作用密切相关。北大砬子岩体锆石SHRIMP U-Pb年龄加权平均值为（123.9±2.2）Ma，高丽墩台岩体锆石SHRIMP U-Pb年龄加权平均值为（1 872±13）Ma。北大砬子岩体ε_Hf（0）为负值，ε_Hf（t）为负值（-16.86~-10.95），说明北大砬子岩体形成时壳源物质成分占主导地位，单阶段Hf模式年龄（T_DM）平均为1 339 Ma，两阶段Hf模式年龄（T_DM^C）平均为2 043 Ma；高丽墩台岩体ε_Hf（0）为负值，ε_Hf（t）为正值（0.29~4.64），说明高丽墩台岩体形成时壳源物质成分占主导地位，并有地幔物质混染，单阶段Hf模式年龄（T_DM）平均为2 171 Ma，两阶段Hf模式年龄（T_DM^C）平均为2 355 Ma。结合岩石地球化学特征得出：北大砬子岩体具有高钾钙碱性岩浆岩特征，为较高分异的过铝质I型花岗岩，是底侵岩浆提供热动力使下地壳物质部分熔融的产物，属于晚中生代大陆边缘岩浆弧环境，其与进入早白垩世古太平洋板块俯冲作用密切相关，岩浆活动直接影响盘岭矿集区内一期铜、铅、锌、钼等矿化作用；高丽墩台岩体具有低钾（拉斑）岩浆岩特征，为较高分异的过铝质I型花岗岩，是热的玄武质熔体加热下地壳使之熔融的产物，且可能有地幔物质贡献，岩体侵入诱发的一系列断裂（包括层间断裂）控制着矿集区内矿脉及岩脉的空间分布。

关键词: 辽宁盘岭矿集区, 花岗岩, 锆石SHRIMP U-Pb年龄, Hf同位素, 早白垩世, 古元古代

Abstract: The Panling ore concentration area is a typical paleoproterozoic sedimentary basin and a multi-metal ore-concentrated area, located in the zone of Caohekou-Caohecheng-Heiyu, also in the middle section of Liaoning-Jilin rift. The Beidalazi rock developed in the Early Cretaceous and the Gaoliduntai rock developed in Paleoproterozoic are closely related with the mineralization in this ore-concentrated area. The weighted average of the zircon SHRIMP U-Pb age of the Beidalazi rock is (123.9±2.2) Ma, and the weighted average of the zircon SHRIMP U-Pb age of the Gaoliduntai rock is (1 872±13) Ma. The ε_Hf(0) value of the Beidalazi rock is negative, and the ε_Hf (t) is (-16.86——10.95), that indicate its shell material domination when the Beidalazi rock formed. The single stage Hf model age (T_DM) is 1 339 Ma, and the two-stage Hf model age (T_DM^C) is 2 043 Ma. The ε_Hf(0) value of Gaoliduntai rock is negative, and the ε_Hf(t) is 0.29-4.64, that indicate the shell material domination when the Gaoliduntai rock formed. The single stage Hf model age (T_DM) is 2 171 Ma, and the two-stage Hf model age (T_DM^C) is 2 355 Ma. The geochemical results show that:The Beidalazi rock is of high-K calc-alkaline series and highly differentiated aluminous I-type granite, and it is a thickened and molten product of the lower crust with a serious magma contamination in the Late Mesozoic continental margin magmatic arc environment resulted from the Early Cretaceous subduction of the paleo Pacific plate; The magmatic activity directly led to the mineralization of copper, lead, zinc and molybdenum etc. in Panling area. While the Gaoliduntai rock is a kind of low potassium magmatite (tholeiitic) and highly differentiated aluminous I-type granite caused by the melting of the basaltic melt to heat the crust to melt, and it may have the contribution of mantle material invasion induced by a series of faults (including inter-layer fractures) to control the mineralization and distribution of the ore veins.

Key words: Liaoning Panling ore concentration area, granite, zircon SHRIMP U-Pb age, Hf isotope, Early Cretaceous, Paleoproterozoic

中图分类号:

P588.121

杨凤超, 宋运红, 赵玉岩. 辽宁盘岭矿集区花岗岩锆石SHRIMP U-Pb年龄、Hf同位素组成及地质意义[J]. 吉林大学学报(地球科学版), 2017, 47(5): 1429-1441.

Yang Fengchao, Song Yunhong, Zhao Yuyan. Zircon SHRIMP U-Pb Age and Hf Isotope of Granite in Panling Ore Concentration Area in Liaoning and Its Geological Significance[J]. Journal of Jilin University(Earth Science Edition), 2017, 47(5): 1429-1441.

参考文献

[1] 王艳.辽宁本溪盘岭地区铜、铅锌矿床成矿条件探讨[J].辽宁地质, 2001,18(1):38-45. Wang Yan.Discussion on Metallogenic Conditions of Cu,Pb-Zn Deposits in Panling Area of Benxi, Liaoning[J]. Liaoning Geology, 2001,18(1):38-45.
[2] 方磊,王永春,刘宪春,等.辽宁省吴家堡钼矿地质特征及找矿方向浅析[J].地质调查与研究, 2011,35(2):119-131. Fang Lei,Wang Yongchun,Liu Xianchun, et al. Geological Characteristics and Prospecting Direction of the Wujiapu Molybdenum Deposit in Liaoning Province[J]. Geological Survey and Research, 2011,35(2):119-131.
[3] 沈明,齐艳杰,张想定,等.辽宁省本溪县盘岭铜矿床地质特征及找矿前景分析[J].有色矿冶, 2011,27(4):11-20. Shen Ming,Qi Yanjie, Zhang Xiangding, et al. Geological Features and Prospective Potential of Copper Ore Deposit in Panling Area, Benxi County, Liaoning Province[J]. Non-Ferrius Mining and Metallurgy, 2011,27(4):11-20.
[4] Compston, Williams I S,Kirschvink J L, et al. Zircon U-Pb Ages from the Early Cambrian Time-Scale[J]. Journal of Geological Society of London, 1992,149:171-179.
[5] 宋彪,张拴宏,王彦斌,等.锆石SHRIMP年龄测定数据处理时系统偏差的避免:标准铅石分段校正的必要性[J].岩矿测试, 2006,25(1):9-21. Song Biao, Zhang Shuanhong, Wang Yanbin, et al. Mount Making and Procedure of the SHRIMP Dating[J]. Geological Review, 2006,25(1):9-21.
[6] Claoue-Long J C, Compston W, Roberts J, et al. Two Carboniferous Ages:A Comparison of SHRIMP Zircon Dating with Conventional Zircon Ages and ⁴⁰Ar/³⁹Ar Analysis[J]. SEPN Special Publication, 1995,5:3-11.
[7] 侯可军,李延河,邹天人,等. LA-MC-ICP-MS锆石Hf同位素的分析方法及地质应用[J].岩石学报, 2007,23(10):2595-2604. Hou Kejun, Li Yanhe, Zou Tianren, et al. LA-MC-ICP-MS Analysis and Geological Application Zircon Hf Isotope[J]. Acta Petrologica Sinica, 2007,23(10):2595-2604.
[8] Scherer E, Munker C, Mezger K. Calibration of the Lutetium-Hafnium Clock[J].Science, 2001,293:683-687.
[9] Blichert-Toft J, Albarède F. The Lu-Hf Isotope Geochemistry of Chondrites and the Evolution of the Mantle-Crust system[J]. Earth and Planetary Science Letters, 1997,148(1/2):243-258.
[10] Rickwood P C. Boundary Lines Within Petrologic Dia-grams Which Use Oxides of Major and Minor Elements[J]. Lithos, 1989,22:247-255.
[11] Wilson M. Igneous Petrogenesis:Aglobal Tectonic Approach[M]. London:Unwin and Hyman, 1989:1-466.
[12] 辽宁省地质矿产调查院大连分院.1:5万区域地质调查报告(甜水、草河口镇、青城子镇、通远堡镇)[R].沈阳:辽宁省地质调查院,2001:114-117. Liaoning Province Geological and Mineral Investigation Institute Dalian Branch. 1:5 Million Regional Geological Survey Report (Tianshui, Caohekou Town, Qingchengzi Town, Tongyuanpu Town)[R]. Shenyang:Liaoning Provincial Geological Survey, 2001:114-117.
[13] Sun S S, McDonough W F. Chemical and Isotopic Systematics of Oceanic Basalt:Implications for Mantle Composition and Processes[J].Geological Society, London, Special Publications,1989,42:312-320.
[14] 路孝平,吴福元,林景仟,等.辽东半岛南部早前寒武纪花岗质岩浆作用的年代学格架[J]. 地质科学,2004,39(1):123-131. Lu Xiaoping, Wu Fuyuan, Lin Jingqian, et al. Geochronological Successions of the Early Precambrian Granitic Magmatism in Southern Liaodong Peninsula and Its Constraints Tectonic Evolution of the North China Craton[J]. Chinese Journal Geology, 2004,39(1):123-131.
[15] 路孝平,吴福元,张艳斌,等.吉林南部通化地区古元古代辽吉花岗岩的侵位年代与形成构造背景[J].岩石学报, 2004,20(3):381-390. Lu Xiaoping, Wu Fuyuan,Zhang Yanbin, et al. Emplacement Age and Tectonic Setting of the Paleopruterote-Rozoic Liaoji Granites in Tonghua Area, Southern Jilin Province[J]. Acta Petrologica Sinica, 2004,20(3):381-390.
[16] 路孝平,吴福元,郭敬辉,等.通化地区古元古代晚期花岗质岩浆作用与地壳演化[J].岩石学报,2005,21(3):721-735. Lu Xiaoping, Wu Fuyuan, Guo Jinghui, et al. Late Paleoproterozoic Granitc Magmatism and Crustal Evolution in the Tonghua Region, Northeast China[J]. Acta Petrologica Sinica, 2005,21(3):721-735.
[17] 宋运红,杨凤超,闫国磊,等.辽东地区古元古代花岗岩SHRIMP U-Pb年龄、Hf同位素组成及构造意义[J]. 地质学报,2016,90(10):2620-2636. Song Yunhong, Yang Fengchao, Yan Guolei, et al. SHRIMP U-Pb Ages and Hf Isotopic Compositions of Paleoproterozoic Granites from the Eastern Part of Liaoning Province and Their Tectonic Significance[J]. Acta Geologica Sinica.,2016,90(10):2620-2636.
[18] Yang J H, Wu F Y, Wilde S A, et al. Petrogenesis of Late Triassic Granitoids and Their Enclaves with Implications for Post-Co Lisional Lithospheric Thinning of the Liaodong Peninsula, North China Craton[J]. Chem Geol, 2007,242(1/2):155-161.
[19] 吴福元,杨进辉,柳小明.辽东半岛中生代花岗质岩浆作用的年代学格架[J].高校地质学报, 2005,11(3):305-311. Wu Fuyuan, Yang Jinhui, Liu Xiaoming. The Chronological Framework for Magmatism of Mesozoic Granites in Dandong, Liaoning Province[J]. Geological Journal of Universities, 2005,11(3):305-311.
[20] 杨凤超,宋运红,郝立波,等.辽东三家子地区晚侏罗世花岗岩SHRIMP U-Pb年龄、Hf同位素特征及地质意义[J].地质学报,2015,89(10):1773-1782. Yang Fengchao,Song Yunhong, Hao Libo, et al. Late Jurassic SHRIMP U-Pb Age and Hf Iostopic Characteristics of Granite from the Sanjiazi Area in Liaodong and Their Geological Significance[J]. Acta Geologica Sinica,2015,89(10):1773-1782.
[21] 杨凤超,孙景贵,宋运红,等.辽东连山关地区新太古代花岗杂岩SHRIMP U-Pb年龄、Hf同位素组成及地质意义[J].地球科学:中国地质大学学报,2016,41(12):2008-2018. Yang Fengchao, Sun Jinggui, Song Yunhong, et al. SHRIMP U-Pb Age, Hf Isotope Composition and Geochemical Characteristics of Neoarchean Granitic Comples in Liaodong Lianshanguan Area, NE China[J]. Earth Science:Journal of China University of Geoscience,2016,41(12):2008-2018.
[22] Yin A, Nie S. A Phanerozoic Palinspastie Reconstruc-tion of China and Its Neighboring Regions[C]//Yin A, Harrison T M. The Tectonic Evolution of Asia. New York:Cambridge University Press, 1996:442-285.
[23] 贺高品,叶慧文.辽东-吉南地区早元古代两种类型变质作用及其构造意义[J].岩石学报,1998,14(2):152-162. He Gaopin, Ye Huiwen. Liaodong-Early Proterozoic Two Types of Metamorphism and Tectonic Significance Southern Jilin Province[J]. Acta Petrologica Sinica, 1998,14(2):152-162.
[24] Li S Z, Zhao G C, Sun M, et al. Not all the Liaoji Granites are Paleoproterozoic:Evidence of SHRIMP U-Pb Zircon Ages[J]. Episodes, Submitted, 2004, 46 (2):162-176.
[25] 周建波,石爱国,景妍.东北地块群:构造演化与古大陆重建[J].吉林大学学报(地球科学版),2016,46(4):1042-1055. Zhou Jianbo, Shi Aiguo, Jing Yan. The Combined NE China Blocks:Tectonic Evolution and Supercontinent Reconstructions[J]. Journal of Jilin University(Earth Science Edition), 2016, 46(4):1042-1055.
[26] Liu J L, L Y J, Chen H, et al. The Inner Zone of the Liaoji Paleorift:Its Early Structural Styles and Structural Evolution[J]. Journal of Asian Earth Sciences, 1997,15(1):19-31.
[27] Zhao G C. Palaeoproterozoic Assembly of the North China Craton[J]. Geological Magazine, 2001,138:89-91.
[28] Wilde S A, Zhao G C, Sun M. Development of the North China Craton During the Late Archacan and Its Final Amalgamation at 1.8 Ga:Some Speculations on Its Position Within a Global Palacoproterozoic Supercontinent[J]. Gondwana Research, 2002,5(1):85-94.
[29] Taira A. Tectonic Evolution of the Japanese Island Arc System[J]. Annual Review of Earth and Planetary Sciences, 2001,29:109-134.
[30] Sun W D, Ding X, Hu, et al. The Golden Trans-formation of the Cretaceous Plate Subduction in the West Pacifıc[J]. Earth and Planetary Science Letters, 2007, 262:533-542.
[31] 杨启军,秦亚,王泰山,等.广西佛子冲矿田二长花岗斑岩的年代学、地球化学特征及其意义[J].吉林大学学报(地球科学版),2017,47(3):760-774. Yang Qijun, Qin Ya, Wang Taishan, et al. Chronology and Geochenical Characteristics of Monzogranitic Porphyry from Fozichong Ore Field in Guangxi Province and Their Geological Implication[J]. Journal of Jilin University(Earth Science Edtion), 2017,47(3):760-774.
[32] Li C W, Guo F, Zhao L, et al. Geochemical Con-straints on Petrogensis of Late Mesozoic Intermediate-Felsic Volcanic Rocks from the Southeastern Jilin Province[J].Acta Petrol Sinica, 2010, 26:1074-1088.
[33] Zhang Y B, Wu F Y, Wilde S A, et al. Zircon U-Pb Ages and Tectonic Implications of ‘Early Paleozoic’ Granitoids at Yanbian, Jilin Province, Northeast China[J]. The Island Arc, 2004, 13:484-505.
[34] Wang Q, Xu J F, Jian P, et al. Petrogenesis of Adakitic Porphyries in an Extensional Tectonic Setting, Dexing, South China; Implications for the Genesis of Porphyry Copper Mineralization[J]. Journal of Petrology, 2006, 47:119-144.
[35] Yu Y, Xu W L, Pei F P, et al. Chronology and Geochemistry of Mesozoic Volcanic Rocks in the Linjiang Area, Jilin Province and Their Tectonic Implica-Tions[J]. Acta Geologica Sinica:English Edition, 2009, 83:245-257.
[36] Xu W L, Wang F, Pei F P, et al. Mesozoic Tectonic Regimes and Regional Ore-Forming Background in NE China:Constraints from Spa-Tial and Temporal Variations of Mesozoic Volcanic Rock Asso-Ciations[J]. Acta Petrologia Sinica, 2013,29:339-353.
[37] Pearce J A, Harris N B W, Tindle A G. Trace Element Discrimination Diagrams for the Tectonic Interpretation of Granitic Rocks[J]. Journal of Petrology, 1984,25:956-983.
[38] Yang J H, Wu F Y, Shao J, et al. Constraints on the Timing of Uplift of the Yanshan Fold and Thrust Belt, North China[J]. Earth and Planetary Science Letters, 2006, 246:336-352.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed