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安徽滁县琅琊山一带燕山期岩浆岩成因及区域找矿方向

, PP. 259-273

Keywords: 滁县琅琊山,燕山期岩浆岩,岩石化学特征,岩石成因,找矿方向

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Abstract:

滁县琅琊山铜矿床是长江中下游成矿带北东段滁县-庐江铜金成矿带的一部分,为安徽东部目前发现规模最大的铜及伴生金矿床。与成矿关系密切的滁县岩体,长期以来前人鲜有系统的地球化学研究,本文在野外地质调查的基础上,系统采集了一套滁县岩体样品,发现其地球化学特征与典型的埃达克岩基本一致:具有SiO2>56%,Al2O3≥15%,富Sr、Ba和Cr、Ni,具有高的Sr/Y和(La/Yb)N值,但Y和Yb含量低,无明显Eu异常,另外岩石具有较高的MgO、Mg#及Sr/La值,显示海水蚀变MORB相似的地球化学特征。分析认为,该区燕山期岩浆岩为洋壳俯冲产物,属比较典型的和成矿有关的埃达克岩,伴随着该期侵入岩的上侵,富含Cu、Au的成矿物质随着温度、压力或者氧逸度的降低,在合适的部位富集成矿。对比分析了上腰铺岩体的地球化学特征,认为它和滁县岩体特征基本一致,应该有着相似的成岩成矿背景。同时在滁县岩体西南段发现一条含微细粒黄铁矿碎裂状白云岩质硅化带,在上腰铺岩体周边发现一条多金属矿化硅质脉,并对琅琊山含铜矿化矽卡岩及上述白云岩质硅化带和多金属矿化硅质脉进行了地质分析和痕量元素测试,认为它们与燕山期侵入岩有着密切的关系,上腰铺岩体周边可以作为下步铜及伴生金矿床勘查的新的远景地区,同时指出该区找矿不能只盯着矽卡岩型铜金矿而忽视多金属矿化硅质脉新类型矿的寻找。

References

[1]  Guo F, Fan W M and Li C W. 2006. Geochemistry of late Mesozoic adakites from the Sulu belt,eastern China:Magma genesis and implications for crustal recycling beneath continental colisional orogens.Geological Magazine, 143(1):1-13.
[2]  Hedenduist J W and Lowenstern J B.1994.The role of magmas in the formation of hydrothermal ore deposits.Nature,370:519-527. Huang Fang, Li Shuguang, Dong Feng, He Yongsheng and Chen Fukun. 2008. High-Mg adakitic rocks in the Dabie orogen, central China: Implications for foundering mechanism of lower continental crust. Chemical Geology, 255: 1-13.
[3]  Ling M X, Wang F Y, Ding X, Hu Y H, Zhou J B, Zartman R E, Yang X Y and Sun W D. 2009. Cretaceous ridge sub-duction along the Lower Yangtze River Belt, eastern China. Economic Geology, 104: 303-321.
[4]  常印佛, 刘湘培, 吴言昌. 1991. 长江中下游铜铁成矿带. 北京: 地质出版社: 1-379.
[5]  邓晋福,叶德隆,赵海玲,汤德平.1992. 下扬子地区火山作用、深部过程与盆地形成.武汉:中国地质大学出版社: 1-183.
[6]  侯明金, 赵文广, 王东运, 李勇, 杨友进. 2001. 全椒县范水洼金矿区控矿构造初步研究. 安徽地质, 11(3): 206-214.
[7]  侯增谦,潘小菲,杨志明,曲晓明. 2007. 初论大陆环境斑岩铜矿. 现代地质,21(2):332-351.
[8]  李惠,张文华,常凤池,曲媛菲,左宏伟.1999. 金矿盲矿预测的原生晕轴向“反(向)分带”和地化参数轴向“转折”准则. 桂林工学院学报,19(2):114-117.
[9]  李印,凌明星,丁兴,刘健,韩峰,孙卫东. 2009. 中国东部埃达克岩与成矿作用. 大地构造与成矿学,33(3):448-464.
[10]  秦燕,梅玉萍,王登红,张建,吴礼彬. 2009. 安徽滁县琅琊山铜矿辉钼矿铼-锇同位素定年及其地质意义.岩矿测试,28(3):259-264.
[11]  石玉若,刘敦一,张旗,简平,张福勤,苗来成,施光海,张履桥,陶华.2005.内蒙古苏左旗白音宝力道Adakite质岩类成因探讨及其SHRIMP年代学研究. 岩石学报,2l(1):143-150.
[12]  孙卫东,胡艳华,丁兴,范安川,梁华英. 2007. 汇聚板块边缘岩浆中金属和氯的地球化学性质研究. 地学前缘,l4(2):139-148.
[13]  孙卫东,凌明星,汪方跃,丁兴,胡艳华、周继斌,杨晓勇. 2008. 太平洋板块俯冲与中国中东部中生代地质事件. 矿物岩石地球化学通报,27(3):218-225.
[14]  孙卫东, 凌明星, 杨晓勇, 范蔚茗, 丁兴, 梁华英. 2010. 洋脊俯冲与斑岩铜金矿成矿. 中国科学(D辑),40( 2 ): 127 -137.
[15]  王波华,张怀东,彭海辉. 2007. 安徽省滁县市琅琊山铜矿成矿规律与深部找矿.安徽地质,17(3):174-177.
[16]  王金荣,郭原生,付善明,陈建林,秦秀峰,张洪培,杨永均. 2005. 甘肃黑石山早古生代埃达克质岩的发现及其构造动力学意义. 岩石学报,2l(3):977-985.
[17]  王强,许继峰,赵振华. 2003. 强烈亏损重稀土元素中酸性侵入岩(或埃达克质岩)与成矿. 地学前缘,10(4):561-572.
[18]  王强,赵振华,许继峰,Derek A.Wyman,熊小林,资峰,白正华. 2006. 天山北部石炭纪埃达克岩-高镁安山岩-富Nb岛弧玄武质岩: 中亚造山带显生宙地壳生长与铜金成矿的意义. 岩石学报, 22(1): 11-30.
[19]  王元龙,张旗,王强,刘红涛,王焰. 2003. 埃达克质岩与Cu-Au成矿作用关系的初步探讨. 岩石学报,l9(3):543-550.
[20]  汪洋,邓晋福,姬广义. 2004. 长江中下游地区早白垩世埃达克质岩的大地构造背景及其成矿意义. 岩石学报,20(2):297-314.
[21]  谢成龙,朱光,牛满兰,王勇生. 2007. 滁县中生代火山岩LA-ICP-MS锆石U-Pb年龄及构造地质学意义. 地质论评,53(5):642-655.
[22]  余良范,杨晓勇,孙卫东,池月余,张千明. 2008. 埃达克岩与皖中沙溪斑岩铜矿的成矿作用. 中国地质,35(6):1150-1161.
[23]  翟裕生,姚书振,林新多,金福全,周珂若,万天丰,周宗桂. 1992. 长江中下游地区铁、铜等成矿规律. 矿床地质, 11(1): 1-12.
[24]  张旗,秦克章,王元龙,张福勤,刘红涛,王焰. 2004a. 加强埃达克岩研究,开创中国Cu、Au等找矿工作的新局面. 岩石学报,20(2):195-204.
[25]  张旗,秦克章,许继峰,刘红涛,王元龙,王焰,贾秀琴,韩松. 2004b. 中国与埃达克质岩有关的矿床分布、找矿方向及找矿方法刍议. 华南地质与矿产,(2):1-8.
[26]  张旗,王焰,钱青,杨进辉,王元龙,赵太平,郭光军. 2001a. 中国东部燕山期埃达克岩的特征及其构造-成矿意义. 岩石学报,17(2): 236-244.
[27]  张旗,王焰,王元龙. 2001b. 燕山期中国东部高原下地壳组成初探:埃达克质岩Sr、Nd同位素制约. 岩石学报,17(4):505-513.
[28]  资锋,王强,戴圣潜,许卫,许继峰,邱华宁,梁细荣,涂湘林,刘颖. 2007. 皖东滁县、上腰铺埃达克质侵入岩年代学及地球化学特征:岩石成因与成矿意义. 岩石学报,23(6):1485-1500.
[29]  资锋,王强,唐功建,宋彪,谢烈文,杨岳衡,梁细荣,涂湘林,刘颖. 2008. 皖中管店岩体的SHRIMP锆石U-Pb年代学与地球化学:岩石成因和动力学意义. 地球化学,37(5): 462-480.
[30]  Atherton M P and Petford N. 1993. Generation of sodium-rich magmas from newly underplated basaltic crust. Nature, 362: 144-146.
[31]  Castillo P R.2006.An overview of adakite petrogenesis.Chinese Science Bulletin,5l(3): 257-268.
[32]  Castillo P R, Janney P E and Solidum R U. 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: 33-5l.
[33]  Chen J F and Jahn B M. 1998. Crustal evolution of southeastern China: Nd and Sr isotopic evidence. Tectonophysics, 284: l0l-l33.
[34]  Defant M J.2002.Reply for comment by R Conner on the" Evidence suggests slab melting in arc magmas" by M Defant and P Kepezhinskas(EOS,2001,82:65,68-69).EOS, 66:256 -257.
[35]  Defant M J and Drummond P M. 1990. Derivation of some modern arc magmas by melting of young subducted lithosphere.Nature,347:662-665.
[36]  Gao S,Rudnick R L,Yuan H L,Liu X M,Liu Y S,Xu W L,Liu W L,Ayers J,Wang X C and Wang Q H. 2004.Recycling lower continental crust in the North China craton.Nature,432:892-897.
[37]  Liu S A, Li S G, He Y S and Huang F. 2010. Geochemical contrasts between early Cretaceous ore-bearing and ore-barren high-Mg adakites in central-eastern China: Implications for petrogenesis and Cu-Au mineralization. Geochimica et Cosmochimica Acta, 74: 7160-7178.
[38]  Maruyama S, Isozaki Y, Kimura G and Terabayashi M. 1997. Paleogeographic maps of the Japanese Islands: Plate tectonic synthesis from 750 Ma to the present. Island Arc, 6(1): 121-142.
[39]  Mungall J E. 2002. Roasting the mantle:Slab melting and the genesis of major Au and Au-rich Cu deposits. Geology, 30: 915-918.
[40]  Oyarzun R, Marquez A and Lillo J. 2001. Giant versus small porphyry copper deposits of Cenozoic age in northen Chile: Adakitic versus normal calc-alkaline magmatism. Mineralium Deposita, 36: 794-798.
[41]  Peccerillo R and Taylor S R. 1976. Geochemistry of Eocene calc-alkaline volcanic rocks from the Kastamonu area, northern Turkey. Contrib Mineral Petrol, 58: 63-81.
[42]  Rollinson H R. 2000. 岩石地球化学. 杨学明, 杨晓勇, 陈双喜译. 合肥: 中国科学技术大学出版社: 117-118.
[43]  Sillitoe R H. 1997. Characteristic and controls of the largest porphyry copper-gold and epithermal gold deposits in the circum-Pacific region. Australian Journal of Earth Sciences, 44: 373-388.
[44]  Sun W D, Arculus R J, Kamenetsky V S and Binns R A. 2004. Release of gold-bearing fluids in convergent margin magmas prompted by magnetite crystallization. Nature, 431: 975-978.
[45]  Sun W D, Ding X, Hu Y H and Li X H. 2007. The golden transformation of the Cretaceous plate subduction in the west Pacific. Earth and Planetary Science Letters, 262: 533-542.
[46]  Thieblemont D, Stein G and Lescuyer J L. 1997. Epithermal and porphyry deposits: The adakite connection. Earth and Planetary Sciences, 325: 103-109.
[47]  Wang Q, Xu J F, Jian P, Bao Z W, Zhao Z H, Li C Y, Xiong X L and Ma J L. 2006a. Petrogenesis of adakitic porphyries in an extensional tectonic setting, Dexing, South China: Implications for the genesis of porphyry copper mineralization. Journal of Petrology, 47: 119-144.
[48]  Wang Q, Wyman D A, Xu J F, Zhao Z H, Jian P, Xiong X L, Bao Z W, Li C F and Bai Z H. 2006b. Petrogenesis of Cretaceous adakitc and shoshonitic igneous rocks in the Luzong area, Anhui Province(eastern China): Implications for geodynamics and Cu-Au mineralization. Lithos, 89: 424-446.
[49]  Wang Q, Wyman D A, Xu J F, Jian P, Zhao Z H, Li C F, Xu W, Ma J L and He B. 2007a. Early Cretaceous adakitic granites in the Northern Dabie complex, central China: Implications for partial melting and delamination of thickened lower crust. Geochimica et Cosmochimica Acta, 71: 2609-2636.
[50]  Wang Q, Wyman D A, Xu J F, Jian P and Zi F. 2007b. Partial melting of thickened or dalaminated lower crust in the middle of eastern China: Implications for Cu-Au mineralization. The Journal of Geology, 115: 149-161.
[51]  Wang Q, Wyman D A, Zhao Z H, Xu J F, Bai Z H, Xiong X L, Dai T M, Li C F and Chu Z Y. 2007c. Petrogenesis of Carboniferous adakites and Nb-enriched arc basalts in the Ajataw area,northern Tian Shan Range(western China): Implication for Phanerozoic crustal growth of Central Asia Orogenic Belt. Chemical Geology, 236: 42-64.
[52]  Xu J F, Shinjo R, Defant M J, Wang Q and Rapp R P. 2002. Origin of Mesozoic adakitic intrusive rocks in the Ningzhen area of east China: Partial melting of delam inated lower continental crust? Geology, 12: 1111-1114.
[53]  Xu X S, Fan Q C, OReiny S Y, Jiang S Y, Grimn W L, Wang R C and Qiu J S. 2004. U-Pb dating of zircons from quartz diorite and its enclaves at Tongguan shan in Anhui and its petrogenetic implication. Chinese Science Bulletin, 49: 2073-2082.
[54]  Zhang H F, Zhan G L, Harris N, Jin L L and Yuan H L. 2006. U-Pb zircon ages, geochemical and isotopic compositions of granitoids in Songpan-Garze fold beld, eastern Tibetan Plateau: Constraints on petrogenesis and tectonic evolution of the basement. Contributions to Mineralogy and Petrology, 152: 75-88.

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