| 河南省汝阳梅花玉的矿物学特征 |
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| 引用本文： | 张建洪,康日仓,李劲松.河南省汝阳梅花玉的矿物学特征[J].岩石矿物学杂志,1993,12(1):76-86. |
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| 作者姓名： | 张建洪 康日仓 李劲松 |
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| 作者单位： | 中国地质大学，中国地质大学，中国宝玉石协会 北京 100083，北京 100083，北京 100812 |
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| 摘 要： | 梅花玉是一种杏仁状安山岩,产于河南省汝阳县境内。其基质含大量的细条板状低钠长石,具交织结构;斑晶为低钠长石;杏仁体中的矿物成分主要有低钠长石、微斜长石、绿帘石、蠕绿泥石、石英、方解石、磁铁矿等,是一套典型的低温热液矿物组合。利用X射线分析、电子探针分析、红外光谱分析等,对上述矿物从矿物成分、结构状态等方面进行了研究。此外,还对梅花玉进行了显微硬度的测定。
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| 关 键 词： | 梅花玉 矿物学 钠长石 斜长石 |
Mineralogical Characteristics of Meihuayu-Jade from Ruyang County,Henan Provipce |
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| Zhang Jianhong,Kang Ricang,Li Jinsong China University of Geosciences,Beijing Gemmological Association of Chin,Beijing.Mineralogical Characteristics of Meihuayu-Jade from Ruyang County,Henan Provipce[J].Acta Petrologica Et Mineralogica,1993,12(1):76-86. |
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| Authors: | Zhang Jianhong Kang Ricang Li Jinsong China University of Geosciences Beijing Gemmological Association of Chin Beijing |
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| Institution: | Zhang Jianhong,Kang Ricang,Li Jinsong China University of Geosciences,Beijing 100083 Gemmological Association of China,Beijing 100812 |
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| Abstract: | Meihuayu-jade occurring in Ruyang Goapty, Henan Province, is a kind of black amygdaloidal andesite. Its matrix is characterized by thin lath--shapedlow albite microcrystals, exhibiting vitropatic--interlocking texture. Porphyriticcrystals are low albite. Mineral composition of amygdaloidal bodies is quitecomplex, and the major minerals include low albite, maximum--microcline,epidote, ripidolite, quartz, calcite, magnetite etc., making up a set of typicalepithermal mineral assemblage formed as a result of postmagmatic hydrothermalalteration. In this paper, the authors made a detailed study on feldspars, epidote andchloxite by means of X--ray diffraction analysis, electric microprobe analysisand ihfrared spectroscopic analysisi It is found that Plagioclase is low albite inorder, alkali feldspar is low temperature maximum microcline with fairly hightriclinity and order, epidote contains abundant iron, and chlorite is ripidolite.In addition, micro--hardness test-was made on several spots of the matrix in thejade, and the result shows that the jade has rather high hardness (Mohs'hardness being 5.2) and beautiful streaks, and is massive and of good quality,thus serving as a good jade material. |
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| Keywords: | Meihuayu-jade amygdaloidal structure low albite microcline epidote chlorite |
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