[1]高守业,王丽娟*,陆建军,等.宁芜和庐枞盆地含矿岩体地球化学特征对比[J].华东地质,2017,38(01):21-27.[doi:10.16788/j.hddz.32-1865/P.2017.01.003]
 GAO Shou-ye,WANG Li-juan,LU Jian-jun*,et al.Geochemical comparison of ore-bearing rocks associated with iron mineralization in the Ningwu and Luzong basins[J].East China Geology,2017,38(01):21-27.[doi:10.16788/j.hddz.32-1865/P.2017.01.003]
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宁芜和庐枞盆地含矿岩体地球化学特征对比()
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《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:
38
期数:
2017年01期
页码:
21-27
栏目:
基础地质
出版日期:
2017-03-15

文章信息/Info

Title:
Geochemical comparison of ore-bearing rocks associated with iron mineralization in the Ningwu and Luzong basins
文章编号:
2096-1871(2017)01-021-07
作者:
高守业王丽娟2*陆建军1马东升1宋革文3
(1 南京大学地球科学与工程学院内生金属成矿机制研究重点实验室,南京 210023; 2 江苏省地质调查研究院,南京 210018; 3 上海梅山矿业有限公司,南京 210041)
Author(s):
GAO Shou-ye1 WANG Li-juan2 LU Jian-jun1* MA Dong-sheng1 SONG Ge-wen3
(1 State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China; 2 Geological Survey of Jiangsu Province, Nanjing 210018, China; 3 Shanghai Meishan Mining co., LTD, Nanjing 210041, China)
关键词:
含矿岩体 地球化学 宁芜盆地 庐枞盆地
Keywords:
ore-bearing igneous rocks geochemistry Ningwu basin Luzong basin
分类号:
P59
DOI:
10.16788/j.hddz.32-1865/P.2017.01.003
文献标志码:
A
摘要:
宁芜和庐枞盆地是长江中下游地区重要的铁矿产区,两盆地内含矿岩体的岩石学和地球化学特征既具有一定的相似性又表现出一定的差异性。文章对两个盆地内主要含矿岩体的岩相学、主量元素、微量元素、稀土元素、Sr-Nd同位素和锆石Hf同位素等进行对比研究,以期进一步探讨两盆地中成矿岩体的差异。镜下观察结果显示宁芜和庐枞盆地主要含矿岩体具有相同的矿物组合,主量元素特征表明这些岩体具有中硅、富钾和高镁的特点,均为中—基性火成岩。与宁芜盆地含矿岩体相比,庐枞盆地含矿岩体的∑REE、∑LREE和∑HREE含量均较高,明显富集Th、U等大离子亲石元素,具有明显的Eu负异常,说明庐枞盆地含矿岩体的地壳物质较多。两个盆地含矿岩体的Sr-Nd同位素组成指示岩体均来源于富集地幔,庐枞盆地含矿岩体较低的锆石Hf同位素组成说明在岩浆侵入和演化过程中可能有更多的地壳物质加入,导致岩浆的粘稠度降低,更有利于庐枞盆地铁矿的形成。
Abstract:
The Ningwu and Luzong basins in the Yangtze River region are characterized by the occurrence of extensive iron ore deposits. The igneous rocks associated with iron deposits in the two basins share similar petrologic features, although they differ in geochemical and isotopic signatures. To further reveal the differences of ore-bearing rocks in two basins, this paper conducted comparative study on petrography, major and trace elements, rare earth elements, Sr-Nd and zircon Hf isotopic compositions of the main ore-bearing igneous rocks from the two basins. The observation results under microscope show that two basins have the same mineral assemblages. Analyses of major elements indicate that the rocks are characterized by medium Si,and high K and Mg, suggestive of intermediate-mafic igneous rocks. Compared with the ore-bearing strata in the Ningwu basin, the strata in the Luzong basin contain relatively high ∑REE, ∑LREE and ∑HREE, especially with enrichment in Th and U and obvious negative Eu anomaly, suggesting that the ore-bearing rocks of the Luzhong basin contain much crust material. The Sr-Nd isotopic compositions indicate that the igneous rocks in the two basins were derived from enriched mantle. The lower zircon Hf isotopic compositions of the Luzong basin suggest that during the process of intrusion and evolution of magma, more crustal materials were added and this process resulted in the reduction of magma viscosity. Therefore it was more favorable for the iron mineralization in the Luzong basin.

参考文献/References:

[1] 翟裕生,姚书振,林新多,等. 长江中下游地区铁、铜等成矿规律研究[J]. 矿床地质,1992(1):1-12.

[2] 常印佛,刘湘培,吴言昌.长江中下游铜铁成矿带[M].北京:地质出版社,1991.
[3] 舒全安, 陈培良, 程建荣.鄂东铁铜矿产地质[M].北京:冶金工业出版社, 1992:146-152.
[4] 毛景文,段超, 刘佳林, 等. 陆相火山—侵入岩有关的铁多金属矿成矿作用及矿床模型—以长江中下游为例[J]. Acta Petrologica Sinica, 2012, 28(1):1-14.
[5] 李玉松,蔡晓兵,汪晶,等.安徽庐枞盆地黄寅冲铅锌矿床闪长玢岩锆石U-Pb年龄及其地质意义[J].华东地质,2016,37(1):19-27.
[6] 张景,陈国光,张明,等.宁芜盆地白象山矿区物化探异常特征及找矿意义[J].华东地质,2016,37(2):147-151.
[7] 宁芜研究项目编写小组.宁芜玢岩铁矿[M].北京:地质出版社,1978:1-160.
[8] 周涛发,范裕,袁峰,等. 宁芜(南京—芜湖)盆地火山岩的年代学及其意义[J]. 中国科学:地球科学,2011(7):960-971.
[9] 中科院地球化学研究所.宁芜型铁矿床形成机理[M].北京:科学出版社,1987:45-180.
[10] 任启江,王德滋,徐兆文,等. 安徽庐枞火山—构造洼地的形成、演化及成矿[J]. 地质学报,1993(2):131-145.
[11] 张旗,简平,刘敦一,等. 宁芜火山岩的锆石SHRIMP定年及其意义[J].中国科学:地球科学,2003,33(4):309-314.
[12] 薛怀民,董树文,马芳. 长江中下游地区庐(江)—枞(阳)和宁(南京)—芜(湖)盆地内与成矿有关潜火山岩体的SHRIMP锆石U-Pb年龄[J]. 岩石学报,2010,26(9):2653-2664.
[13] 侯可军,袁顺达.宁芜盆地火山—次火山岩的锆石U-Pb年龄、Hf同位素组成及其地质意义[J].岩石学报,2010,26(3):888-902.
[14] 王丽娟,王汝成,于津海,等. 宁芜盆地火山—侵入岩的时代、地球化学特征及其地质意义[J]. 地质学报,2014,88(7):1247-1272.
[15] 周涛发,范裕,袁峰,等. 安徽庐枞(庐江—枞阳)盆地火山岩的年代学及其意义[J].中国科学:地球科学,2008,38(11):1342-1353.
[16] 范裕, 周涛发, 袁峰, 等. 宁芜盆地闪长玢岩的形成时代及对成矿的指示意义[J]. 岩石学报, 2010, 26(9): 2715-2728.
[17] 袁峰,周涛发,范裕,等. 宁芜盆地花岗岩类的锆石U-Pb年龄、同位素特征及其意义[J]. 地质学报,2011,85(5):821-833.
[18] 周涛发,范裕,袁峰,等. 庐枞盆地侵入岩的时空格架及其对成矿的制约[J]. 岩石学报,2010,26(9):2694-2714.
[19] 张乐骏. 安徽庐枞盆地成岩成矿作用研究[D].合肥:合肥工业大学,2011.
[20] 陈毓川,盛继福,艾永德. 梅山铁矿——一个矿浆热液矿床[J]. 中国地质科学院院报矿床地质研究所分刊,1981.
[21] ahn B M, Wu F Y, Lo C H, etal. Crust-mantle interaction induced by deep subduction of the continental crust: Geochemical and Sr—Nd isotopic evidence from post-collisional mafic-ultramafic intrusions of the northern Dabie complex, central China[J]. Chemical Geology, 1999, 365(2/3): 119-146.
[22] 郭维民,陆建军,蒋少涌,等. 安徽铜陵狮子山矿田岩浆岩年代学、Hf同位素、地球化学及岩石成因[J]. 中国科学:地球科学,2013(8):1268-1286.

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备注/Memo

备注/Memo:
*收稿日期:2016-05-28 修订日期:2016-06-09 责任编辑:谭桂丽
基金项目:国家自然科学基金青年基金项目(项目编号:41102123)、中国地质调查局项目“宁芜溧水火山岩盆地岩浆构造演化与成矿作用关系研究(项目编号:1212011120864)”、“江苏省(含上海市)矿产资源调查成果综合集成与服务产品开发”联合资助。
第一作者简介:高守业,1989年生,男,硕士,矿床地球化学专业。
通讯作者简介:王丽娟,1983年生,女,博士,岩石学专业。
更新日期/Last Update: 2017-03-23