滇东南富宁地区基性侵入岩及喷出岩时代
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摘要
在滇东南富宁地区基性侵入岩、喷出岩较发育,前人将其划分为"半瓦型"侵入岩、"安定型"侵入岩和"龙康型"喷出岩3类,3类岩石普遍缺乏可靠的同位素年代学资料。在对富宁地区基性侵入岩、喷出岩进行区域地质调查的基础上,应用LAICP-MS技术对其进行锆石U-Pb测年,在半瓦型侵入岩和安定型侵入岩中分别获得了254.0±2.0Ma和244.2±4.4Ma的加权平均年龄,在龙康型喷出岩中获得251.9±3.0Ma和255.92±0.72Ma加权平均年龄。结合野外调查和综合研究,将富宁地区"安定型"侵入岩的时代界定于中三叠世,将"半瓦型"侵入岩和"龙康型"喷出岩的时代界定于晚二叠世。
Basic rocks composed of Banwa-type intrusive rocks, Anding-type intrusive rocks and Longkang-type extrusive rocks are well outcropped in Funing area, southeast Yunnan Province, but they lacked chronological information. Based on regional geological investigation in Funing area, the authors applied LA-ICP-MS tech to determining the U-Pb age of zircons from intrusive and extrusive basic rocks. The weighted averages of 254.0±2.0 Ma and 244.2±4.4 Ma were obtained from Banwa-type intrusive rocks and Anding-type intrusive rocks respectively, and the weighted averages of 251.9±3.0 Ma and 255.92±0.72 Ma were obtained from Longkang-type extrusive rocks. Combined with field geological survey and comprehensive research, the authors hold that the age of the Anding-type intrusive rocks should be Middle Triassic, and the age of the Banwa-type intrusive rocks and the Longkang-type extrusive rocks should be Late Permian.
Basic rocks composed of Banwa-type intrusive rocks, Anding-type intrusive rocks and Longkang-type extrusive rocks are well outcropped in Funing area, southeast Yunnan Province, but they lacked chronological information. Based on regional geological investigation in Funing area, the authors applied LA-ICP-MS tech to determining the U-Pb age of zircons from intrusive and extrusive basic rocks. The weighted averages of 254.0±2.0 Ma and 244.2±4.4 Ma were obtained from Banwa-type intrusive rocks and Anding-type intrusive rocks respectively, and the weighted averages of 251.9±3.0 Ma and 255.92±0.72 Ma were obtained from Longkang-type extrusive rocks. Combined with field geological survey and comprehensive research, the authors hold that the age of the Anding-type intrusive rocks should be Middle Triassic, and the age of the Banwa-type intrusive rocks and the Longkang-type extrusive rocks should be Late Permian.
引文
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(2)云南省地质调查院.云南1:5万睦伦街等4幅区域地质矿产调查报告.2017.
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[6]朱明波.云南省富宁县牙牌-安定夕卡岩型铁矿矿床特征及成因研究[D].昆明理工大学硕士学位论文,2010:1-74.
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[9]黄庆,李波,周文龙,等.云南富宁弄楼岩体岩相特征及成矿阶段划分[J].矿产综合利用,2013(4):52-56.
[10]周文龙,李波,黄庆,等.富宁基性岩区尾硐铜镍硫化物矿床矿化特征及矿床成因探讨[J].科学技术与工程,2013,13(20):5908-5914.
[11]赵红果,闫晓波.云南富宁牙牌矽卡岩型磁铁矿矿床特征[J].云南地质,2013,32(1):42-44.
[12]周文龙.云南富宁基性-超基性岩区铜镍矿床地球化学特征研究[D].昆明理工大学硕士学位论文,2013:1-95.
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[14]郑国龙.云南富宁县安定铜镍矿地质特征及矿床成因[J].云南地质,2014,33(4):550-554.
[15]罗坤,付义琴.云南富宁定皇钛铁砂矿矿床成因[J].云南地质,2014,33(3):375-379.
[16]赵作新,沈辉,赵梓涵.云南富宁县牛场钛铁砂矿矿床成因及富集规律[J].云南地质,2014,33(4):520-525.
[17]熊风,陶琰,邓贤泽.云南富宁洞哈铁矿磁铁矿微量元素地球化学特征[J].矿物学报,2015(增刊):172-173.
[18]彭留伟.云南安定铜镍矿地质特征及矿床成因分析[J].资源信息工程,2016,31(1):45-46.
[19]李政林,刘希军,时毓,等.右江盆地南缘二叠-三叠纪基性岩研究及其与金矿的成矿关系探讨[J].矿物学报,2015(增刊):227-228.
[20]吴根耀,吴浩若,钟大赉,等.滇桂交界处古特提斯的洋岛和岛弧火山岩[J].现代地质,2000,14(4):393-400.
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[23]Wang C Y,Zhou M F,Qi L.Chalcophile element geochemistry and petrogenesis of high-Ti and low-Ti magmas in the Permian Emeishan large igneous province,SW China[J].Contributions to Mineralogy&Petrology,2011,161(2):237-254.
[24]Huang H,Du Y S,Yang J H,et al.Origin of Permian basalts and clastic rocks in Napo,Southwest China:Implications for the erosion and eruption of the Emeishan large igneous province[J].Lithos,2014,208/209:324-338.
[25]李政林,刘希军,许继峰,等.右江盆地基性岩的地球化学演化特征及其区域构造意义[J].桂林理工大学学报,2015,35(4):727-735.
[26]陈雪峰,刘希军,许继峰,等.桂西那坡基性岩地球化学:峨眉山地幔柱与古特提斯俯冲相互作用的证据[J].大地构与成矿学,2016,40(3):531-548.
[27]Liu X J,Liang Q D,Li Z L,et al.Origin of Permian extremely high Ti/Y mafic lavas and dykes from Western Guangxi,SW China:Implications for the Emeishan mantle plume magmatism[J].Journal of Asian Earth Sciences,2017,141:97-111.
[28]江文,向忠金,夏文静,等.滇东南富宁地区基性侵入岩与峨眉山地幔柱存在成因关系吗?--来自1:5万洞波幅和皈朝幅地质填图的证据[J].岩石学报,2017,33(10):3109-3122.
[29]范蔚茗,王岳军,彭头平,等.桂西晚古生代玄武岩Ar-Ar和U-Pb年代学及其对峨眉山玄武岩省喷发时代的约束[J].科学通报,2004,49(18):1892-1900.
[30]黄虎,杨江海,杜远生,等.右江盆地上二叠统-中三叠统凝灰岩年龄及其地质意义[J].地球科学-中国地质大学学报,2012,37(1):125-138.
[31]黄虎.右江盆地晚古生代-中三叠世盆地演化--来自沉积岩和火山岩地球化学特征的证据[D].中国地质大学(武汉)博士学位论文,2013:1-160.
[32]张晓静,肖加飞.桂西北玉凤、巴马晚二叠世辉绿岩年代学、地球化学特征及成因研究[J].矿物岩石地球化学通报,2014,33(2)163-176.
[33]熊风,陶琰,廖名扬,等.云南富宁地区与矽卡岩型铁矿有关基性岩锆石U-Pb年龄及地球化学特征[J].矿床地质,2014,33(增刊):297-298.
[34]皮桥辉,胡瑞忠,彭科强,等.云南富宁者桑金矿床与基性岩年代测定--兼论滇黔桂地区卡林型金矿成矿构造背景[J].岩石学报,2016,32(11):3331-3342.
[35]Pearce N J G,Perkins W T,Westgate J A,et al.A Compilation of New and Published Major and Trace Element Data for NISTSRM 610 and NIST SRM 612 Glass Reference Materials[J].Geostandards Newsletter,2010,21(1):115-144.
[36]Liu Y S,Hu Z C,Gao S,et al.In situ analysis of major and trace elements of an hydrous minerals by LA-ICP-MS without applying an internal standard[J].Chemical Geology,2008,257(1):34-43.
[37]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 of mantle xenoliths[J].Journal of Petrology,2010,51(1/2):537-571.
[38]Anderson T.Correction of common lead in U-Pb analyses that do not report204Pb[J].Chemical Geology,2002,192(1):59-79.
[39]Ludwig K R.User's Manual for Isoplot 3.0:Geochronological Toolkit for Microsoft Excel[J].Berkeley Geochronology Center Special Publication,2003,4:1-70.
[40]Liu Y S,Hu Z C,Zong K Q,et al.Reappraisement and refinement of zircon U-Pb isotope and trace element analyses by LA-ICP-MS[J].Chinese Science Bulletin,2010,55(15):1535-1546.
[41]Belousova E,Griffin W,O'Reilly S Y,et al.Igneous zircon:trace element composition as an indicator of source rock type[J].Contributions to Mineralogy&Petrology,2002,143(5):602-622.
[42]吴元保,郑永飞.锆石成因矿物学研究及其对U-Pb年龄解释的制约[J].科学通报,2004,49(16):1589-1604.
[43]周剑雄,陈振宇.电子探针下锆石阴极发光的研究[M].成都:电子科技大学出版社,2007:1-104.
[44]王行军,王根厚,专少鹏,等.新疆和硕县包尔图一带花岗岩LA-ICP-MS锆石U-Pb年龄及其地质意义[J].地质通报,2012,31(8):1251-1266.
(1)云南省地质局.1:20万富宁幅区域地质调查报告.1978.
(2)云南省地质调查院.云南1:5万睦伦街等4幅区域地质矿产调查报告.2017.
(3)李静,张志斌,熊家镛,等.云南省成矿地质背景研究报告.
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