山东昌乐县北岩地区玄武岩中铁尖晶石矿物学特征研究
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摘要
论文对山东潍坊市昌乐县北岩镇产出的尖晶石进行了基本特征、成分特征和红外光谱分析。研究发现此地产出的尖晶石,颗粒较大,多呈粒状,颜色主要为褐黑色,透明度较差,晶体可见不完全的八面体晶型,解理不发育、折射率大于1.78,相对密度(3.7～3.9)g/cm~3,明显大于镁尖晶石。化学成分以Al_2O_3,MgO以及FeO为主,经过计算,该地尖晶石为Fe尖晶石;通过红外光谱测试可知,694cm~(-1)和1 023 cm~(-1)附近的两个吸收峰为该尖晶石的特征吸收峰。通过对比前人对此地尖晶石的研究可知,论文研究尖晶石可能为早期刚玉经过多期次作用形成的产物。
This paper analyses the basic characteristics, composition characteristics and infrared spectra of spinel from Beiyan region, Changle County, Weifang City, Shandong Province. The results show that the spinel produced in this area is large, mostly granular, mainly brown-black in color, poor transparency, incomplete octahedral crystal,cleavage undeveloped, refractive index greater than 1.78, density 3.7-3.9 g/cm~3, apparently larger than magnesia spinel. The chemical composition of spinel is mainly Al_2O_3, MgO and FeO. By calculation, the geospinel is iron spinel. According to the infrared spectrum test, the two absorption peaks near 694 cm~(-1) and 1023 cm~(-1) are the characteristic absorption peaks of the spinel. By comparing with the previous studies on geospinel, it can be seen that the spinel may be the product of early corundum formed by multiple stages.
This paper analyses the basic characteristics, composition characteristics and infrared spectra of spinel from Beiyan region, Changle County, Weifang City, Shandong Province. The results show that the spinel produced in this area is large, mostly granular, mainly brown-black in color, poor transparency, incomplete octahedral crystal,cleavage undeveloped, refractive index greater than 1.78, density 3.7-3.9 g/cm~3, apparently larger than magnesia spinel. The chemical composition of spinel is mainly Al_2O_3, MgO and FeO. By calculation, the geospinel is iron spinel. According to the infrared spectrum test, the two absorption peaks near 694 cm~(-1) and 1023 cm~(-1) are the characteristic absorption peaks of the spinel. By comparing with the previous studies on geospinel, it can be seen that the spinel may be the product of early corundum formed by multiple stages.
引文
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[12]张春池,杨恩秀,李秀章,等.山东临朐-昌乐地区新生代火山岩研究[J].上海地质,2010,31(S1):137-139+156.
[13]丁振华.山东刚玉巨晶的成因--来自矿物包裹体的证据[J].矿物学报,2009,29(4):442-446.
[14]刘丹,张瑞香.山东昌乐玄武岩中蓝宝石成因探讨[J].山东科技大学学报(自然科学版),2017,31(3):10-12.
[15]赵令权,孔凡梅,李旭平,等.新生代碱性玄武岩及其蓝宝石成矿模式探讨--以鲁西昌乐地区为例[J].山东科技大学学报(自然科学版),2015,34(4):7-27.
[16]孔凡梅,李旭平,赵令权,等.昌乐地区新生代碱性玄武岩中刚玉、尖晶石巨晶岩相学、矿物化学特征[J].地质论评,2017,63(2):441-457.
[2]郑巧荣.由电子探针分析Fe2+和Fe3+[J].矿物学报,1983(1):55-62.
[3]曹盼.天然、合成宝石的谱学特征研究-以变石、水晶、尖晶石、欧珀为例[D].昆明:昆明理工大学,2017.
[4]冯传启,张克立,孙聚堂.锂锰尖晶石红外光谱的研究[J].光谱学与光谱分析,2003(2):279-281.
[5]谢意红.不同颜色缅甸尖晶石的宝石学特征及其成分分析[J].珠宝科技,2003(1):58-59.
[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(4):805-816.
[7]YUI T F,ZAW K,LIMTRAKUN P.Oxygen isotope composition of the Denchai sapphire,Thailand:a clue to its enigmatic origin[J].Lithos,2003,67(1):153-161.
[8]GUO J,O’REILLY S Y,GRIFFIN W L.Corundum from basaltic terrains:a mineral inclusion approach to the enigma[J].Contributions to Mineralogy and Petrology,1996,122:368-386.
[9]周二斌,杨竹森,江万,等.藏南罗布莎铬铁矿床铬尖晶石矿物学与矿床成因研究[J].岩石学报,2011,27(7):2060-2072.
[10]牛晓薇.山东昌乐蓝宝石LA-ICP-MS分析及环带研究[D].北京:中国地质大学(北京),2014.
[11]张战军.山东蓝宝石及其环带研究[D].西安:西北大学.2003.
[12]张春池,杨恩秀,李秀章,等.山东临朐-昌乐地区新生代火山岩研究[J].上海地质,2010,31(S1):137-139+156.
[13]丁振华.山东刚玉巨晶的成因--来自矿物包裹体的证据[J].矿物学报,2009,29(4):442-446.
[14]刘丹,张瑞香.山东昌乐玄武岩中蓝宝石成因探讨[J].山东科技大学学报(自然科学版),2017,31(3):10-12.
[15]赵令权,孔凡梅,李旭平,等.新生代碱性玄武岩及其蓝宝石成矿模式探讨--以鲁西昌乐地区为例[J].山东科技大学学报(自然科学版),2015,34(4):7-27.
[16]孔凡梅,李旭平,赵令权,等.昌乐地区新生代碱性玄武岩中刚玉、尖晶石巨晶岩相学、矿物化学特征[J].地质论评,2017,63(2):441-457.