GEOCHRONOLOGY AND GEOCHEMISTRY OF THE LAMPROPHYRE DIKES IN QIXIA AREA, SHANDONG PROVINCE: Geological Implication
-
摘要:
对山东栖霞河西夼地区的煌斑岩脉进行了岩相学、锆石U-Pb年代学和岩石地球化学研究. 锆石U-Pb测年结果显示, 煌斑岩中锆石年龄可以分为151~163 Ma、212~230 Ma、1 822~1 962 Ma及2 431~(2 613±37)Ma四个年龄区间. 其中8颗年轻锆石的206Pb/238U年龄介于(151±2)~(163±4)Ma之间, 加权平均年龄为153.7±2.8 Ma, 认为这一年龄代表了其形成时代. 其余锆石均为继承锆石, 指示在岩浆活动过程中受到了壳源物质的混染. 岩石地球化学的分析结果表明, 研究区煌斑岩具有Rb、Ba、Th、Pb及轻稀土元素富集, Ta、Nb、Zr、Hf、Ti等元素相对亏损的特征. 综合认为研究区煌斑岩形成于太平洋板块向欧亚板块俯冲背景下的火山弧环境, 在上升过程中受到了壳源物质的混染.
Abstract:The paper studies the petrography, zircon U-Pb chronology and petrogeochemistry of the lamprophyre dikes in Hexikuang area of Qixia, Shandong Province. The zircon U-Pb dating results show that the age of zircons in the lamprophyre can be divided into four age intervals: 151-163 Ma, 212-230 Ma, 1 822-1 962 Ma and 2 431-(2 613±37) Ma. The 206Pb/238U ages of eight young zircons range from (151±2) to (163±4) Ma, with the weighted mean age of 153.7±2.8 Ma, which represents its formation age. The others are inherited zircons, indicating that they are contaminated by crust-derived materials during magmatic activity. The lithogeochemical analysis results reveal that the lamprophyre in the area is characterized by enrichment of Rb, Ba, Th, Pb and LREEs, and relative depletion of Ta, Nb, Zr, Hf and Ti. From the above, it is concluded that the lamprophyre was formed in the volcanic arc environment under the background of subduction of Pacific Plate beneath Eurasian Plate, and was contaminated by crust-derived materials during its ascent.
-
Key words:
- lamprophyre /
- zircon U-Pb geochronology /
- lithogeochemistry /
- petrogenesis /
- Shandong Province
-
-
[1] 陈衍景, Pirajno F, 赖勇, 等. 胶东矿集区大规模成矿时间和构造环境[J]. 岩石学报, 2004, 20(4): 907-922. https://www.cnki.com.cn/Article/CJFDTOTAL-YSXB200404013.htm
Chen Y J, Pirajno F, Lai Y, et al. Metallogenic time and tectonic setting of the Jiaodong gold province, eastern China[J]. Acta Petrologica Sinica, 2004, 20(4): 907-922. https://www.cnki.com.cn/Article/CJFDTOTAL-YSXB200404013.htm
[2] 宋明春. 山东省大地构造单元组成、背景和演化[J]. 地质调查与研究, 2008, 31(3): 165-175. https://www.cnki.com.cn/Article/CJFDTOTAL-QHWJ200803004.htm
Song M C. The composing, setting and evolution of tectonic units in Shandong Province[J]. Geological Survey and Research, 2008, 31 (3): 165-175. https://www.cnki.com.cn/Article/CJFDTOTAL-QHWJ200803004.htm
[3] 丁正江, 孙丰月, 刘福来, 等. 胶东伟德山地区铜钼多金属矿锆石U-Pb法测年及其地质意义[J]. 岩石学报, 2013, 29(2): 607-618. https://www.cnki.com.cn/Article/CJFDTOTAL-YSXB201302019.htm
Ding Z J, Sun F Y, Liu F L, et al. U-Pb dating of zircons from the Weideshan molybdenum copper polymetallic deposits in Jiaodong Peninsula, China, and its geological significance[J]. Acta Petrologica Sinica, 2013, 29(2): 607-618. https://www.cnki.com.cn/Article/CJFDTOTAL-YSXB201302019.htm
[4] 朱日祥, 范宏瑞, 李建威, 等. 克拉通破坏型金矿床[J]. 中国科学: 地球科学, 2015, 45(8): 1153-1168. https://www.cnki.com.cn/Article/CJFDTOTAL-JDXK201508006.htm
Zhu R X, Fan H R, Li J W, et al. Decratonic gold deposits[J]. Science China Earth Sciences, 2015, 58(9): 1523-1537. https://www.cnki.com.cn/Article/CJFDTOTAL-JDXK201508006.htm
[5] 李洪奎, 卜文峰, 禚传源, 等. 山东胶东矿集区中生代构造事件与金矿成矿作用[J]. 山东国土资源, 2017, 33(1): 1-9, 34. https://www.cnki.com.cn/Article/CJFDTOTAL-SDDI201701001.htm
Li H K, Bu W F, Zhuo C Y, et al. Mesozoic tectonic events and mineralization of gold deposits in Jiaodong area in Shandong Province [J]. Shandong Land and Resources, 2017, 33(1): 1-9, 34. https://www.cnki.com.cn/Article/CJFDTOTAL-SDDI201701001.htm
[6] 王瑞良, 张招崇, 曾庆栋, 等. 胶东栖霞金矿集区早白垩世花岗岩形成时代及地质意义[J]. 大地构造与成矿学, 2019, 43(1): 186-198. https://www.cnki.com.cn/Article/CJFDTOTAL-DGYK201901014.htm
Wang R L, Zhang Z Z, Zeng Q D, et al. Ages of the Early Cretaceous granites in Qixia gold concentration area, Shandong Province and implications for gold mineralization[J]. Geotectonica et Metallogenia, 2019, 43(1): 186-198. https://www.cnki.com.cn/Article/CJFDTOTAL-DGYK201901014.htm
[7] 迟乃杰, 韩作振, 单伟, 等. 胶东郭家岭序列北截杂岩体SHRIMP锆石U-Pb年代学、岩石学、地球化学特征及构造意义[J]. 山东科技大学学报(自然科学版), 2021, 40(5): 30-42. https://www.cnki.com.cn/Article/CJFDTOTAL-SDKY202105004.htm
Chi N J, Han Z Z, Shan W, et al. SHRIMP U-Pb zircon geochronology, petrology, geochemical characteristics and tectonic significance of Beijie complex of Guojialing sequence in Jiaodong Peninsula[J]. Journal of Shandong University of Science and Technology (Natural Science), 2021, 40(5): 30-42. https://www.cnki.com.cn/Article/CJFDTOTAL-SDKY202105004.htm
[8] 宋明春, 崔书学, 周明岭, 等. 山东省焦家矿区深部超大型金矿床及其对"焦家式"金矿的启示[J]. 地质学报, 2010, 84(9): 1349-1358. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE201009009.htm
Song M C, Cui S X, Zhou M L, et al. The deep oversize gold deposit in the Jiaojia field, Shandong Province and its enlightenment for the Jiaojia-type gold deposits[J]. Acta Geologica Sinica, 2010, 84(9): 1349-1358. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE201009009.htm
[9] 李洪奎, 陈国栋, 耿科, 等. 山东胶东金矿成矿地质背景初论[J]. 山东国土资源, 2018, 34(5): 34-41. https://www.cnki.com.cn/Article/CJFDTOTAL-SDDI201805004.htm
Li H K, Chen G D, Geng K, et al. Primary discussion on mineralization geological background of Jiaodong gold deposits in Shandong Province [J]. Shandong Land and Resources, 2018, 34(5): 34-41. https://www.cnki.com.cn/Article/CJFDTOTAL-SDDI201805004.htm
[10] 李秀章, 王立功, 李衣鑫, 等. 胶东艾山岩体二长花岗岩地球化学、锆石U-Pb年代学及Lu-Hf同位素特征研究[J]. 现代地质, 2022, 36(1): 333-346. https://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ202201030.htm
Li X Z, Wang L G, Li Y X, et al. Geochemistry, zircon U-Pb chronology and Lu-Hf isotope characteristics of monzogranites from Aishan pluton in Jiaodong Peninsula[J]. Geoscience, 2022, 36(1): 333-346. https://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ202201030.htm
[11] 程小久, 程景平, 王江海, 等. 胶东蓬家夼金矿区钾玄质煌斑岩的元素地球化学研究[J]. 地球化学, 1998, 27(1): 91-100. https://www.cnki.com.cn/Article/CJFDTOTAL-DQHX199801010.htm
Cheng X J, Cheng J P, Wang J H, et al. Element geochemistry of shoshonitic lamprophyres in the Pengjiakuang gold district, Shandong Province, China[J]. Geochimica, 1998, 27(1): 91-100. https://www.cnki.com.cn/Article/CJFDTOTAL-DQHX199801010.htm
[12] 徐红, 徐光平. 胶东煌斑岩的地球化学特征及成因探讨[J]. 岩石矿物学杂志, 2000, 19(1): 36-44. https://www.cnki.com.cn/Article/CJFDTOTAL-YSKW200001004.htm
Xu H, Xu G P. Geochemical characteristics and genesis of the lamprophyres in the Jiaodong gold ore district, Shandong Province[J]. Acta Petrologica et Mineralogica, 2000, 19(1): 36-44. https://www.cnki.com.cn/Article/CJFDTOTAL-YSKW200001004.htm
[13] 耿瑞, 孙丰月, 丁正江, 等. 山东栖霞地区与金矿有关的煌斑岩地球化学特征及成因探讨[J]. 地质与资源, 2012, 21(2): 229-233. http://manu25.magtech.com.cn/Jweb_dzyzy/CN/abstract/abstract9042.shtml
Geng R, Sun F Y, Ding Z J, et al. Geochemistry and petrogenesis of the lamprophyres related to gold deposits in Qixia, Shandong Province[J]. Geology and Resources, 2012, 21(2): 229-233. http://manu25.magtech.com.cn/Jweb_dzyzy/CN/abstract/abstract9042.shtml
[14] 祝德成, 韩振玉, 田瑞聪, 等. 山东牟平-乳山金成矿带南段煌斑岩成因机制研究[J]. 地球学报, 2019, 40(2): 249-258. https://www.cnki.com.cn/Article/CJFDTOTAL-DQXB201902001.htm
Zhu D C, Han Z Y, Tian R C, et al. Formation mechanism of lamprophyres in southeast part of the Muping-Rushan gold metallogenic belt in Shandong Province[J]. Acta Geoscientia Sinica, 2019, 40 (2): 249-258. https://www.cnki.com.cn/Article/CJFDTOTAL-DQXB201902001.htm
[15] Rock N M S, Groves D I. Do lamprophyres carry gold as well as diamonds?[J]. Nature, 1988, 332(6161): 253-255. doi: 10.1038/332253a0
[16] Prelevii D, Foley S F, Cvetkovi V, et al. Origin of minette by mixing of lamproite and dacite magmas in Veliki Majdan, Serbia[J]. Journal of Petrology, 2004, 45(4): 759-792. doi: 10.1093/petrology/egg109
[17] 万渝生, 宋志勇, 王来明, 等. 华北克拉通太古宙典型地区栖霞县幅1: 5万地质图修编—野外地质调查和SHRIMP锆石U-Pb定年[J]. 地质通报, 2017, 36(11): 1927-1941. https://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD201711004.htm
Wan Y S, Song Z Y, Wang L M, et al. Early Precambrian evolution of the Qixia area, eastern North China Craton: Evidence from geological mapping and SHRIMP U-Pb zircon dating[J]. Geological Bulletin of China, 2017, 36(11): 1927-1941. https://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD201711004.htm
[18] 谢士稳, 王世进, 颉颃强, 等. 华北克拉通胶东地区粉子山群碎屑锆石SHRIMP U-Pb定年[J]. 岩石学报, 2014, 30(10): 2989-2998. https://www.cnki.com.cn/Article/CJFDTOTAL-YSXB202102006.htm
Xie S W, Wang S J, Xie H Q, et al. SHRIMP U-Pb dating of detrital zircons from the Fenzishan Group in eastern Shandong, North China Craton[J]. Acta Petrologica Sinica, 2014, 30(10): 2989-2998. https://www.cnki.com.cn/Article/CJFDTOTAL-YSXB202102006.htm
[19] 宋英昕, 宋明春, 李世勇, 等. 胶东晚中生代三期成矿岩体和3.5 Ga锆石发现及成矿动力学背景[J]. 地质学报, 2019, 93(2): 440-458. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE201902011.htm
Song Y X, Song M C, Li S Y, et al. The discovery of three-stage Late Mesozoic metallogenic granitic bodies and 3.5 Ga zircon in the Jiaodong terrane and their metallogenetic geodynamical setting[J]. Acta Geologica Sinica, 2019, 93(2): 440-458. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE201902011.htm
[20] Liu Y S, Gao S, Hu Z C, et al. 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[J]. Journal of Petrology, 2010, 51(1/2): 537-571.
[21] Andersen T. Correction of common lead in U-Pb analyses that do not report 204Pb[J]. Chemical Geology, 2002, 192(1/2): 59-79.
[22] Ludwig K R. ISOPLOT 3.00: A geochronological toolkit for Microsoft Excel[M]. Berkeley: Berkeley Geochronology Center, 2003.
[23] 路凤香, 舒小辛, 赵崇贺. 有关煌斑岩分类的建议[J]. 地质科技情报, 1991, 10(S1): 55-62. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ1991S1006.htm
Lu F X, Shu X X, Zhao C H. A suggestion on classification of lamprophyres[J]. Geological Science and Technology Information, 1991, 10(S1): 55-62. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ1991S1006.htm
[24] 姜耀辉, 蒋少涌, 赵葵东, 等. 辽东半岛煌斑岩SHRIMP锆石U-Pb年龄及其对中国东部岩石圈减薄开始时间的制约[J]. 科学通报, 2005, 50(19): 2161-2168. https://www.cnki.com.cn/Article/CJFDTOTAL-KXTB200519016.htm
Jiang Y H, Jiang S Y, Zhao K D, et al. SHRIMP U-Pb zircon dating for lamprophyre from Liaodong Peninsula: Constraints on the initial time of Mesozoic lithosphere thinning beneath eastern China[J]. Chinese Science Bulletin, 2005, 50(22): 2612-2620. https://www.cnki.com.cn/Article/CJFDTOTAL-KXTB200519016.htm
[25] 贾宏翔, 陈仁义, 庞振山, 等. 辽东青城子矿集区白云金矿床煌斑岩的岩石成因: 年代学、地球化学与Pb、Hf同位素约束[J]. 中国地质, 2022, 49(5): 1605-1623.
Jia H X, Chen R Y, Pang Z S, et al. Lamprophyre origin of the Baiyun gold deposit in Qingchengzi ore concentration area, eastern Liaoning Province: Constraints of geochronology, geochemistry and Pb, Hf isotopes[J]. Geology in China, 2022, 49(5): 1605-1623.
[26] Sun S S, McDonough W F. Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes [J]. Geological Society, London, Special Publications, 1989, 42 (1): 313-345. doi: 10.1144/GSL.SP.1989.042.01.19
[27] Li S Z, Zhao G C, Santosh M, et al. Paleoproterozoic structural evolution of the southern segment of the Jiao-Liao-Ji belt, North China Craton[J]. Precambrian Research, 2012, 200-203: 59-73. doi: 10.1016/j.precamres.2012.01.007
[28] Green T H. Significance of Nb/Ta as an indicator of geochemical processes in the crust-mantle system[J]. Chemical Geology, 1995, 120(3/4): 347-359.
[29] Plank T. Constraints from thorium/lanthanum on sediment recycling at subduction zones and the evolution of the continents[J]. Journal of Petrology, 2005, 46(5): 921-944. doi: 10.1093/petrology/egi005
[30] 张招崇, 王福生, 郝艳丽, 等. 峨眉山大火成岩省中苦橄岩与其共生岩石的地球化学特征及其对源区的约束[J]. 地质学报, 2004, 78(2): 171-180. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE200402004.htm
Zhang Z C, Wang F S, Hao Y L, et al. Geochemistry of the picrites and associated basalts from the Emeishan large igneous basalt province and constraints on their source region[J]. Acta Geologica Sinica, 2004, 78(2): 171-180. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE200402004.htm
[31] 曹华文, 张寿庭, 王长明, 等. 云南个旧煌斑岩脉地球化学特征及其地质意义[J]. 地球化学, 2013, 42(4): 340-351. https://www.cnki.com.cn/Article/CJFDTOTAL-DQHX201304003.htm
Cao H W, Zhang S T, Wang C M, et al. Geochemical characteristics and genesis of lamprophres in Gejiu tin deposit, Yunnan Province, China[J]. Geochimica, 2013, 42(4): 340-351. https://www.cnki.com.cn/Article/CJFDTOTAL-DQHX201304003.htm
[32] 刘燊, 胡瑞忠, 赵军红, 等. 胶北晚中生代煌斑岩的岩石地球化学特征及其成因研究[J]. 岩石学报, 2005, 21(3): 947-958. https://www.cnki.com.cn/Article/CJFDTOTAL-YSXB200503033.htm
Liu S, Hu R Z, Zhao J H, et al. Geochemical characteristics and petrogenetic investigation of the Late Mesozoic lamprophyres of Jiaobei, Shandong Province[J]. Acta Petrologica Sinica, 2005, 21 (3): 947-958. https://www.cnki.com.cn/Article/CJFDTOTAL-YSXB200503033.htm
[33] Wood D A, Joron J L, Treuil M. A re-appraisal of the use of trace elements to classify and discriminate between magma series erupted in different tectonic settings[J]. Earth and Planetary Science Letters, 1979, 45(2): 326-336. doi: 10.1016/0012-821X(79)90133-X
-
下载:
图(7)
计量
- 文章访问数: 607
- PDF下载数: 29
- 施引文献: 0