南红玛瑙保山料与凉山料的微量元素特征及成因

THE TRACE ELEMENT CHARACTERISTICS AND GENESIS OF BAOSHAN AND LIANGSHAN S RED AGATE

云南保山和四川凉山是南红玛瑙的两个重要产地,采用常规拉曼光谱和原位微区等离子质谱技术,分别对两地南红玛瑙的岩石光谱学及微量元素含量特征进行了测试。结果表明,两地南红玛瑙中除石英外,很少存在其它物相,仅存在少量赤铁矿,表明两地南红玛瑙的色彩均由赤铁矿所致;云南保山南红玛瑙的红料中富集亲石元素Na、K、Al、Ca、Sr及Fe,表明玛瑙形成于同一岩体中,玛瑙的生成顺序为红料、条带状玛瑙/冰红料、冰料;四川凉山南红玛瑙中红料和冰红料在微量元素方面没有规律,表明其形成于不同岩体,随后再在表生搬运、沉积等作用过程中富集成矿。此外,利用亲石元素与Fe含量的相关性,可以有效鉴别南红玛瑙保山料和凉山料。

Yunnan Baoslian and Sichuan Liangslian are 2 im p o ra n t production places o f south red agate. Therock spectrum and trace element o f S red agate o f t liem are tested by routine Raman spectroscopy andtion micro plasma mass spectrographic te ch niq ue. The result shows there are few ot ! ier fa ctite ,besides quarz in the S red agate o f 2 pla ce s, ie the color o f S red agate in 2 places is resulted from the hema-tite . In the red materal of Yunnan Baos!ian S red agate is r c h in l i t ! io p h i le element N a, K ,Al, C a,Sr and F e, which shows the agate is fornied in the same one rock body. The fo m sequence o f agate is red m a te ra l, r ib b o n a g - ate/icy red materal, ic y materal. The trace element is i ie g u la r in red m a te ra l and ic y red m a te ra l o f Sichuan L i- angshan S red agate,showing i t is formed in d iffe re nt rock b o d y,then concentrated and metallogenetic in the sur-face transportation and sedimentation. Moreover, S red agate Baosian and Liangs!ian m a te ra l can be id e n t if ie d ef-fectively according to the relat iv ity o f l i t io p h i le element and Fe content.