Application of LA-ICP-MS Garnet U-Pb Dating Method on the Geochronological Study of Rodingite and Skarn
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摘要: 本文利用Coherent GeoLas HD 型193 nm ArF 准分子激光剥蚀系统和Agilent 7900 型四极杆电感耦合等离子体质谱仪, 建立了LA-ICP-MS 石榴子石U-Pb 定年方法。利用该方法, 对采自冀北地区晚古生代镁铁质-超镁铁质混杂岩体中的异剥钙榴岩和闽西南马坑式铁矿含矿石榴子石矽卡岩这两种岩石中的石榴子石开展U-Pb 定年研究。在冀北地区晚古生代镁铁质-超镁铁质混杂岩体中的异剥钙榴岩中, 获得石榴子石下交点年龄为(387.6±5.4) Ma (D496-1, MSWD=1.1, N=30)和(409.3±7.8) Ma (D493-1, MSWD=2.0, N=60), 在马坑铁矿石榴子石矽卡岩中, 获得石榴子石下交点年龄为(128.6±2.1) Ma (ZK7921-b24, MSWD=2.0, N=60)和(128.7±3.2) Ma (ZK7922-b1, 用锆石91500 校正, MSWD=1.8, N=42); 在潘田铁矿的石榴子石矽卡岩中, 获得石榴子石的下交点年龄为(128.7±1.7) Ma (PT-b1, MSWD=1.7, N=30)和(132.1±1.3) Ma (PT-b1 样品, 用锆石91500 校正, MSWD=1.6, N=30)(除了指明使用锆石标样91500 校正石榴子石未知样品外, 其他皆用石榴子石标样Willsboro 校正石榴子石未知样品的U/Pb 分馏)。以上结果与Sm-Nd 等时线年龄及前人报道的锆石U-Pb 年龄在误差范围内一致。对马坑式铁矿石榴子石矽卡岩U-Pb 定年结果表明, 利用石榴子石标样Willsboro 和锆石标样91500 作为外标样校正同一样品中石榴子石U/Pb 同位素分馏, 获得的下交点年龄一致, 206Pb/238U 年龄的加权平均值也一致, 说明石榴子石与锆石之间的基体效应较小, 在缺乏石榴子石标样时, 可用锆石标样91500 代替。在上述研究基础上分析了石榴子石U-Pb 定年方法在矽卡岩型矿床成矿时代研究及异剥钙榴岩年代学研究中的应用潜力, 认为石榴子石U-Pb 定年方法在矽卡岩型矿床及异剥钙榴岩年代学研究中具有巨大的应用推广前景, 具有重要的理论指导和实际应用意义。Abstract: Using the recently introduced GeoLas HD type 193nm ArF excimer laser ablation system and the Agilent 7900 type quadrupole inductively coupled plasma mass spectrometer, we successfully established the method of in-situ garnet U-Pb analytical method by LA-ICP-MS. A U-Pb dating work was carried out on the rodingite rocks form the Late Paleozoic mafic-ultramafic mélange in the northern Hebei Province and the ore-bearing skarn from Makeng iron deposit in southwestern Fujian. It yielded lower intersection ages of(387.6±5.4) Ma (D496-1, MSWD=1.1, N=30) and (409.3±7.8) Ma (D493-1, MSWD=2.0, N=60) for 2 rodingite samples, and (128.6±2.1) Ma (ZK7921-b24, MSWD=2.0, N=60) and (128.7±3.2) Ma (ZK7922-b1, calibration with zircon 91500, MSWD=1.8, N=42) for 2 skarn samples from Makeng deposit. It yielded lower intersection ages of (128.7±1.7) Ma (PT-b1, MSWD=1.7, N=30) and (132.1±1.3) Ma (PT-b1, calibration with zircon 91500, MSWD=1.6, N=30) for a skarn sample from Pantian deposit (except for samples with instructions of calibration with zircon 91500, other samples are calibrated with garnet Willsboro). The garnet U-Pb ages above were consistent with the Sm-Nd isochron ages and previous zircon U-Pb ages within the allowable error range.Garnet U-Pb ages of the skarn samples collected from the Makeng-type deposit showed that the lower intersection and 206Pb/238U ages were consistent using the garnet Willsboro and zircon 91500 as standard samples respectively, which suggested that the matrix effect is small between zircon and garnet minerals. In case of an absence of the standard garnet sample in the laboratory, the zircon 91500 can be used instead. Based on the above research and understanding, an analysis on the application potential of the garnet U-Pb dating method in the geochronological study on skarn-type deposits and rodingite rocks was done. It is considered that the garnet U-Pb dating method has great application and promotion prospects in the chronology study of skarn-type deposits and rodingite rocks, and it is of great importance on the theoretical guidance and practical application.
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狄永军, 张达, 吴淦国, 等, 2012. 武夷山覆盖区马坑式铁矿层位及找矿方向[J]. 地球科学, 37(6): 1232-1242.
来守华, 陈仁义, 张达, 等, 2014. 福建潘田铁矿床花岗岩岩石地球化学特征、锆石U-Pb 年代学及其与成矿的关系[J]. 岩石学报, 30(6): 1780-1792.
林彬, 陈蕾, 刘振宇, 等, 2020. 石榴子石U-Pb 精确测年对斑岩-矽卡岩型铜矿床成岩时限的制约--以西藏桑日铜矿为例[J]. 地质学报, 94(10): 2883-2892.
刘益, 孔志岗, 陈港, 等, 2021. 滇东南官房钨矿床石榴子石原位 LA-SF-ICP-MS U-Pb 定年及地质意义[J]. 岩石学报, 37(3): 847-864.
刘勇胜, 胡兆初, 李明, 等, 2013. LA-ICP-MS 在地质样品元素分析中的应用[J]. 科学通报, 58(36): 3753-3769.
王博, 赵国春, 2021. 古亚洲洋的最终闭合时限: 来自白乃庙岛弧带东段二叠纪-三叠纪岩浆作用的证据[J]. 西北大学学报(自然科学版), 51(6): 1019-1030.
王岚, 杨理勤, 王亚平, 等, 2012. 锆石LA-ICP-MS 原位微区U-Pb 定年及微量元素的同时测定[J]. 地球学报, 33(5):763-772.
王森, 2016. 闽西南马坑铁矿成矿要素及找矿预测研究[D].北京: 中国地质大学(北京): 1-156.
王森, 张达, VATUVA A, 等, 2015. 福建龙岩大洋-莒舟花岗岩地球化学、年代学、铪同位素特征及其地质意义[J]. 地球化学, 44(5): 450-468.
王森, 张达, 吴淦国, 等, 2018. 闽西南马坑式铁矿成矿结构面特征及找矿意义[J]. 地质力学学报, 24(2): 199-211.
王森, 张拴宏, 张琪琪, 等, 2022. LA-ICP-MS 锆石微区U-Pb 定年方法及不同束斑直径对年龄结果的影响作用探讨[J].地质力学学报, 28(4): 642-652.
王潇逸, 张静, 边晓龙, 等, 2022. 云南马厂箐铜钼矿床石榴子石LA-ICP-MS 原位U-Pb 定年及成分研究[J]. 岩石学报, 38(1): 124-142.
肖文交, 舒良树, 高俊, 等, 2008. 中亚造山带大陆动力学过程与成矿作用[J]. 新疆地质, 26(1): 4-8.
严刚, 倪志耀, 翟明国, 等, 2008. 冀北异剥钙榴岩的岩石学、地球化学及锆石SHRIMP 年代学研究[J]. 矿物岩石, 28(1):21-30.
张承帅, 毛景文, 谢桂青, 等, 2012. 福建马坑矽卡岩型铁(钼)矿床地质特征及辉钼矿Re-Os 同位素年龄[J]. 吉林大学学报(地球科学版), 42(S1): 224-236.
张贵宾, 张立飞, 2011. 柴北缘沙柳河地区洋壳超高压变质单元中异剥钙榴岩的发现及其地质意义[J]. 地学前缘, 18(2):151-157.
张立中, 陈蕾, 王国平, 等, 2020. 石榴石U-Pb 定年对山西义兴寨金矿床角砾岩筒时间的限制和金矿成因的指示[J]. 地球科学, 45(1): 108-117.
张小波, 张世涛, 陈华勇, 等, 2020. 石榴子石U-Pb 定年在矽卡岩矿床中的应用: 以鄂东南高椅山硅灰石(-铜)矿床为例[J].地球科学, 45(3): 856-868.
BARRIE C T, 1990. U-Pb garnet and titanite age for the Bristol Township lamprophyre suite, western Abitibi Subprovince, Canada[J]. Canadian Journal of Earth Sciences, 27(11):1451-1456.
BAXTER E F, SCHERER E E, 2013. Garnet geochronology:Timekeeper of tectonometamorphic processes[J]. Elements, 9(6): 433-438.
CHEN Bin, JAHN B M, WEI Chunjing, 2002. Petrogenesis of Mesozoic granitoids in the Dabie UHP complex, Central China: trace element and Nd–Sr isotope evidence[J]. Lithos, 60(1-2): 67-88.
CHEN Wei, ZHANG Weiqi, SIMONETTI A, et al., 2016. Mineral Chemistry of Melanite from Calcitic Ijolite, the Oka Carbonatite Complex, Canada: Implications for Multi-Pulse Magma Mixing[J]. Journal of Earth Science, 27(4): 599-610.
DENG Xiaodong, LI Jianwei, LUO Tao, et al., 2017. Dating magmatic and hydrothermal processes using andradite-rich garnet U–Pb geochronometry[J]. Contributions to Mineralogy & Petrology, 172(9): 71.
DEWOLF C P, ZEISSLER C J, HALLIDAY A N, et al., 1996. The role of inclusions in U-Pb and Sm-Nd garnet geochronology:Stepwise dissolution experiments and trace uranium mapping by fission track analysis[J]. Geochimica et Cosmochimica Acta, 60(1): 121-134.
DI Yongjun, ZHANG Da, WU Ganguo, et al., 2012. Strata Hosted Makeng Type Iron Deposits and Prospecting Orientation in the Wuyishan Covered Region[J]. Earth Science, 37(6):1232-1242(in Chinese with English abstract).
GREGORY C J, RUBATTO D, ALLEN C M, et al., 2007. Allanite micro-geochronology: A LA-ICP-MS and SHRIMP U-Th-Pb study[J]. Chemical Geology, 245(3-4): 162-182.
LAI Shouhua, CHEN Renyi, ZHANG Da, et al., 2014. Petrogeochemical features and zircon LA-ICP-MS U-Pb ages of granite in the Pantian iron ore deposit, Fujian Province and their relationship with mineralization[J]. Acta Petrologica Sinica, 30(6): 1780-1792(in Chinese with English abstract).
LI Dengfeng, FU Yu, SUN Xiaoming, 2018. Onset and duration of Zn-Pb mineralization in the Talate Pb-Zn (-Fe) skarn deposit, NW China: Constraints from spessartine U-Pb dating[J].Gondwana Research, 63: 117-128.
LIMA S M, CORFU F, NEIVA A M R, et al., 2012. U-Pb ID-TIMS dating applied to U-rich inclusions in garnet[J]. The American Mineralogist, 97(5-6): 800-806.
LIN Bin, CHEN Lei, LIU Zhenyu, et al., 2020. Constraints on the geochronology of porphyry-skarn copper deposit from U-Pb dating of garnet: a case study of the Sangri copper deposit, Tibet[J]. Acta Geologica Sinica, 94(10): 2883-2892(in Chinese with English abstract).
LIU Yi, KONG Zhigang, CHEN Gang, et al., 2021. In-situ LA-SF-ICP-MS U-Pb dating of garnet from Guanfang tungsten deposit in southeastern Yunnan Province and its geological significance[J]. Acta Petrologica Sinica, 37(3):847-864(in Chinese with English abstract).
LIU Yongsheng, HU Zhaochu, LI Ming, et al., 2013. Applications of LA-ICP-MS in the elemental analyses of geological samples[J]. Chinese Science Bulletin, 58(36): 3753-3769(in Chinese).
LIU Yongsheng, HU Zhaochu, ZONG Keqing, et al., 2010. Reappraisement and refinement of zircon U-Pb isotope and trace element analyses by LA-ICP-MS[J]. Chinese Science Bulletin, 55(15): 1535-1546.
LUDWIG K R, 2003.Isoplot 3.00: A Geochronological Toolkit for Microsoft Excel[M]. Berkeley, California: Berkeley Geochronology Center.
MEZGER K, HANSON G N, BOHLEN S R, 1989. U-Pb systematics of garnet: dating the growth of garnet in the late Archean Pikwitonei granulite domain at Cauchon and Natawahunan Lakes, Manitoba, Canada[J]. Contributions to Mineralogy & Petrology, 101(2): 136-148.
MILLONIG L J, ALBERT R, GERDES A, et al., 2020. Exploring laser ablation U–Pb dating of regional metamorphic garnet–The Straits Schist, Connecticut, USA[J]. Earth and Planetary Sciences Letters, 552: 116589.
SEMAN S, STOCKLI D F, MCLEAN N M, 2017. U-Pb geochronology of grossular-andradite garnet[J]. Chemical Geology, 460: 106-116.
TANG Yanwen, GAO Jianfeng, LAN Tingguang, et al., 2021. In situ low-U garnet U-Pb dating by LA-SF-ICP-MS and its application in constraining the origin of Anji skarn system combined with Ar-Ar dating and Pb isotopes[J]. Ore Geology Reviews, 130: 103970.
WANG Bo, ZHAO Guochun, 2021. Final closure of the Paleo-Asian ocean: Constraints from permian-triassic magmatism in the eastern segment of the Bainaimiao Arc Belt[J].Journal of Northwest University(Natural Science Edition), 51(6): 1019-1030(in Chinese with English abstract).
WANG Lan, YANG Liqin, WANG Yaping, et al., 2012. In Situ U-Pb Dating and Trace Element Simultaneity Determination of Zircon by LA-ICP-MS[J]. Acta Geoscientica Sinica, 33(5):763-772(in Chinese with English abstract).
WANG Sen, 2016. Ore-forming Factors and Metallogenic Prediction of Makeng Iron Ore, Southwestern Fujian Province[D].Beijing: China University of Geosciences: 1-156(in Chinese with English abstract).
WANG Sen, ZHANG Da, VATUVA A, et al., 2015. Zircon U-Pb geochronology, geochemistry and Hf isotope compositions of the Dayang and Juzhou granites in Longyan, Fujian and their geological implications[J]. Geochimica, 44(5): 450-468(in Chinese with English abstract).
WANG Sen, ZHANG Da, WU Ganguo, et al., 2017. New geochronologic evidence of diabases and their metallogenic relationship with the Makeng-type iron deposits in Southwest Fujian, SE China[J]. Acta Geologica Sinica(English Edition), 91(6): 2324-2326.
WANG Sen, ZHANG Da, WU Ganguo, et al., 2018. Late Mesozoic tectonic evolution of Southwestern Fujian Province, South China: Constraints from magnetic fabric, zircon U-Pb geochronology and structural deformation[J]. Journal of Earth Science, 29(2): 391-407.
WANG Sen, ZHANG Da, WU Ganguo, et al., 2018. Metallogenic structctural plane characteristics and its prospecting importance for the Makeng type iron deposits in southwestern Fujian Province[J]. Journal of Geomechanics, 24(2):199-211(in Chinese with English abstract).
WANG Sen, ZHANG Shuanhong, ZHANG Qiqi, et al., 2022.In-situ zircon U-Pb dating method by LA-ICP-MS and discussions on the effect of different beam spot diameters on the dating results[J]. Journal of Geomechanics, 28(4): 642-652(in Chinese with English abstract).
WANG Xiaoyi, ZHANG Jing, BIAN Xiaolong, et al., 2022.LA-ICP-MS in-situ U-Pb dating and composition analyzing on the garnets from Machangqing Cu-Mo deposit in Yunnan Province[J]. Acta Petrologica Sinica, 38(1): 124-142(in Chinese with English abstract).
WIEDENBECK M, ALLÉ P, CORFU F, et al., 1995. Three natural zircon standards for U-Th-Pb, Lu-Hf, trace element, and REE analyses[J]. Geostandards Newsletter, 19(1): 1-23.
XIAO Wenjiao, SHU Liangshu, GAO Jun, et al., 2008. Continental dynamics of the Central Asian orogenic belt and its metallogeny[J]. Xinjiang Geology, 26(1): 4-8(in Chinese with English abstract).
YAN Gang, NI Zhiyao, ZHAI Mingguo, et al., 2008. Petrology, geochemistry and zircon shrimp geochronology of rodingites from the north Hebei Province, China[J]. Mineralogy and Petrology, 28(1): 21-30(in Chinese with English abstract).
ZHANG Chengshuai, MAO Jingwen, XIE Guiqing, et al., 2012.Geology and molybdenite Re-Os ages of Makeng skarn-type Fe-Mo deposit in Fujian Province[J]. Journal of Jilin University(Earth Science Edition), 42(S1): 224-236(in Chinese with English abstract).
ZHANG Guibin, ZHANG Lifei, 2011. Rodingite from oceanic lithology of Shaliuhe terane in North Qaidam UHPM belt and its geological implication[J]. Earth Science Frontiers, 18(2):151-157(in Chinese with English abstract).
ZHANG Lizhong, CHEN Lei, WANG Guoping, et al., 2020. Garnet U-Pb Dating Constraints on the Timing of Breccia Pipes Formation and Genesis of Gold Mineralization in Yixingzhai Gold Deposit, Shanxi Province[J]. Earth Science, 45(1):108-117(in Chinese with English abstract).
ZHANG Shuanhong, ZHAO Yue, LIU Xiaochun, et al., 2009. Late Paleozoic to Early Mesozoic mafic–ultramafic complexes from the northern North China Block: Constraints on the composition and evolution of the lithospheric mantle[J]. Lithos, 110(1-4): 229-246.
ZHANG Xiaobo, ZHANG Shitao, CHEN Huayong, et al., 2020.Application of garnet U-Pb dating in the skarn deposit: A case study of Gaoyishan Wo(-Cu) deposit in Southeast Hubei Province[J]. Earth Science, 45(3): 856-868(in Chinese with English abstract).
ZHANG Zhenjie, ZUO Renguang, CHENG Qiuming, 2015. Geological features and formation processes of the Makeng Fe deposit, China[J]. Resource Geology, 65(3): 266-284.
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