鲁西昌乐新生代碱性玄武岩中刚玉/蓝宝石的矿物学特征及其成因探讨
Mineral Characteristics and Origin Discussion of Corundum/Sapphire in Cenozoic Alkali Basalts of the Changle, Western Shandong, China

作者: 陈爽 , 李旭平 , 孔凡梅 , 赵令权 , 陈洪凯 :山东科技大学地质科学与工程学院,山东省沉积成矿作用实验室,山东 青岛;

关键词: 山东昌乐刚玉/蓝宝石矿物学成因Shandong Changle Corundum/Sapphire Mineralogy Origin

摘要: 本文利用电子探针、LA-ICP-MS等现代测试方法系统的分析山东昌乐刚玉/蓝宝石矿物的元素分布特征,探讨了新生代碱性玄武岩中蓝宝石的成因。昌乐刚玉/蓝宝石矿物中总体杂质含量较低,总含量为1.73%~0.21%,不同样品元素含量具有差异,Fe元素是昌乐蓝宝石中含量最高的杂质元素,也明显高于其他产地的玄武岩型蓝宝石。昌乐蓝宝石中Ga元素含量均高于100 ppm,表明昌乐刚玉显示岩浆型成因,裂纹较发育的刚玉叠加了明显的后期熔体渗透交代作用。通过刚玉边部共生的碱性长石初步估算,刚玉形成的条件应接近或大于1000˚C/23 km。

Abstract: On the basis of EPMA and LA-ICP-MS modern analysis methods, we systemically investigate the che- mical characteristics of the Changle corundum/sapphire minerals, and explore the origin of the Changle corundum/sapphire in Cenozoic alkali basalts. The general content of impurity in the Chan-gle corundum/sapphire is low, which is 1.73%~0.21% in total, and is variable in different samples. Among the impurity elements in Changle samples, the concentration of Fe is the highest, and it’s significantly higher than the basalt type sapphires from other origin places. Ga content is higher than 100 ppm in the Changle corundum/sapphire, showing a magma type in origin. The fracture developed corundum presents a significant late melt infiltration and alteration. By the associated alkali feldspar within the margin of corundum crystal, preliminary estimate indicates that the formation of corundum/sapphire conditions should be close to or more than 1000˚C/23 km.

文章引用: 陈爽 , 李旭平 , 孔凡梅 , 赵令权 , 陈洪凯 (2016) 鲁西昌乐新生代碱性玄武岩中刚玉/蓝宝石的矿物学特征及其成因探讨。 地球科学前沿, 6, 115-128. doi: 10.12677/AG.2016.62015

参考文献

[1] 丘志力, 秦社彩. 海南碱性玄武岩中的刚玉巨晶成因探讨[J]. 中山大学学报: 自然科学版, 1995(3): 95-101.

[2] 邹进福, 孔蓓, 袁奎荣. 中国东部含蓝宝石玄武岩的特征及其成岩成矿模式[J]. 矿床地质, 1996(S2): 36-37.

[3] Guo, J., O’Reilly, S.Y. and Griffin, W.L. (1996) Corundum from Basaltic Terrains: A Mineral Inclusion Approach to the Enigma. Contributions to Mineralogy & Petrology, 122, 368-386.
http://dx.doi.org/10.1007/s004100050134

[4] 张培强. 山东昌乐蓝宝石颜色与化学成分的关系[J]. 山东国土资源, 2000(2): 36-43.

[5] 陈盈, 廖宗廷, 薛秦芳. 山东蓝宝石的包裹体研究[J]. 上海国土资源, 2007(3): 63-66.

[6] 董泽龙, 陈小明, 胡文瑄, 等. 山东昌乐新近纪玄武岩中刚玉巨晶反应边的成因[J]. 岩石学报, 2007, 23(4): 805-816.

[7] 余晓艳, 姚晓梅, 汪云峰, 等. 郯庐断裂带中段第三纪玄武岩特征及与刚玉形成的关系[J]. 地质与勘探, 2000, 36(3): 28-31.

[8] 宋玉财, 胡文瑄, 金之钧, 等. 山东昌乐刚玉巨晶中的流体和熔融包裹体及其流体组分特征[J]. 地球化学, 2006, 35(4): 377-387.

[9] 丘志力, 陈炳辉, 陈敬德. 山东昌乐与碱性玄武岩有关刚玉巨晶中锆石包裹体的发现及其意义[J]. 中山大学学报: 自然科学版, 1999(6): 131-132.

[10] 余晓艳, 吴国忠. 山东昌乐蓝宝石矿区的地质特征[J]. 建材地质, 1996(5): 20-22.

[11] 邹进福, 袁奎荣. 山东昌乐新生代玄武岩中蓝宝石宝石学特征及在岩浆中保存条件的探讨(二) [J]. 珠宝, 1991(1): 6-9.

[12] Sutherland, F.L., Schwarz, D., Jobbins, E.A., Coenraads, R.R. and Webb, G. (1998) Distinctive Gem Corundum Suites from Discrete Basalt Fields: A Comparative Study of Barrington, Australia, and West Pailin, Cambodia, Gemfields. Journal of Gemmology, 26, 65-85.
http://dx.doi.org/10.15506/JoG.1998.26.2.65

[13] 董振信, 杨良锋. 山东蓝宝石原生矿床成因探讨[J]. 地球学报, 1999, 20(2): 177-183.

[14] 牛晓薇. 山东昌乐蓝宝石的LA-ICP-MS分析及环带研究[D]: [硕士学位论文]. 北京: 中国地质大学, 2014.

[15] Garland, M.I. (2002) The Alluvial Sapphire Deposits of Western Montana. A thesis submitted in conformity with the requirements for the degree of Doctor of Philosophy, University of Toronto, Toronto, 2.

[16] Peucat, J.J., Ruffault, P., Fritsch, E., et al. (2007) Ga/Mg Ratio as a New Geochemical Tool to Differentiate Magmatic from Metamorphic blue Sapphires. Lithos, 98, 261-274.
http://dx.doi.org/10.1016/j.lithos.2007.05.001

[17] Abduriyim, A. and Kitawaki, H. (2006) Determination of the Origin of Blue Sapphire Using Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). The Journal of Gemmology, 30, 23-36.
http://dx.doi.org/10.15506/JoG.2006.30.1.23

[18] Sutherland, F.L., Zaw, K., Meffre, S., et al. (2009) Gem-Corundum Megacrysts from East Australian Basalt Fields: Trace Elements, Oxygen Isotopes and Origins. Aus-tralian Journal of Earth Sciences, 56, 1003-1022.
http://dx.doi.org/10.1080/08120090903112109

[19] Uher, P., Giuliani, G., Szakáll, S., et al. (2012) Sapphires Related to Alkali Basalts from the Cerová Highlands, Western Carpathians (Southern Slovakia): Composition and Origin. Geologica Carpathica, 63, 71-82.
http://dx.doi.org/10.2478/v10096-012-0005-7

[20] Fuhrman, M.L. and Lindsley, D.H. (1988) Ternary-Feldspar Modeling and Thermometry. American Mineralogist, 73, 201-215.

[21] 邱楠生, 苏向光, 李兆影, 等. 郯庐断裂中段两侧坳陷的新生代构造-热演化特征[J]. 地球物理学报, 2007, 50(5): 1497-1507.

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