STUDY ON KOSMOCHLOR-JADE AND RELATED AMPHIBOLE-JANE （ROCK）
-
摘要: 以缅甸龙肯地区的钠铬辉石玉及相关闪石玉（岩）为研究对象，详细地研究了它们的类型、结构构造、矿物化学成分、X射线粉晶谱学。认为，龙肯地区的钠铬辉石玉及相关闪石玉（岩）原岩分别为橄榄岩、含铬铁矿橄榄岩或铬铁矿体。在高压─超高压条件下，这些原岩遇到富含SiO2，Na2O和Al2O3熔浆时，发生一系列的交代变质反应。其中路铁矿主要被交代为钠铬辉石、铬硬玉或含铬硬玉，橄榄石主要被交代为铝钠闪石。在钠铬辉石玉及相关闪石玉（岩）中，铝钠闪石与钠铬辉石的含量由原岩中橄榄石和铬铁矿的百分比所决定。因此，从闪石玉到钠铬辉石玉可能存在一个连续变化的系列。Abstract: Kosmochlor-jade and related amphibole-jade (rock) in Longken, Myanmar are studied. Their types, texture, mineral chemistry, X-ray powder diffraction spectrum，chemical composition and REE of whole rocks, etc， are elucidated. The protoliths of kosmochlor-jade and related amphibole-jade (rock) in Longken, Myanmar are considered as peridotites, chromite-bearing peridotites, or chromite bodies, respectively. At high or ultrahigh pressure, those protoliths reacted with SiO2, Na2O and Al2O3 melt through a series of metamorphism. Chromite was replaced mainly by kosmochlor, astridite or chromium-bearing jadeite, while peridot was replaced by chromite. As a result, there might be a contin-uous variation from amphibole-jade (rock) to kosmochlor-jade.
-
Keywords:
- kosmochlor-jade /
- amphibole-jade （rock） /
- Longken /
- Myanmar /
- kosmochlor
-
-
[1] 崔文元，王时麒，杨富绪等缅甸翡翠(辉石玉)的分类.中国宝石，1998. (3): 80~86 [2] Ou Yang. A terrestrial source of ureylite. American Mineralogist，1984. 69: 1 180~1 183
[3] Harlow G E, Olds E P. Observations on terrestrial ureyite and ureyitic pyroxene. American Mineralogist. 1997. 72: 127~135
[4] Ou Yang. Microscopic studies of Burmese jadeite jade. Journal of Gemmology, 1993, 23(5): 278~283
[5] Win Htein, Aye Myo Naing. Studies on kos mochlor jadeite and associated minerals in jade of Myanmar. Journal of Gemmology, 1995, 24(5): 315~320
[6] 汤惠民，辉玉的矿物学研究.吳照明珠宝学刊(台湾)，1996,22: 12~31 [7] 陈志强，袁奎荣.缅甸莫子石——一种与翡翠相似玉种的研究珠宝科技，1997, (9): 80~86 [8] 亓利剑，郑曙.谭振字缅甸辉石常见种属与宝石学特征.珠宝科技，1998, 51~56 [9] 亓利剑，郑曙，裴景成.翡翠中钠铬辉石后成合晶与成分变异环带机理.宝石和宝石学杂志，1999, 1(1): 13~18 [10] 江镇城. 翡翠原石之旅.台灣:大亚彩色印刷制版股分有限公司制版，1996 [11] AWley A R. Experimental study of the compositions and stabilities of synthetic nyböite and nyböite-glaucophane amphiboles. Eur. J. Mineral, 1992, (4): 171~192
计量
- 文章访问数: 27
- HTML全文浏览量: 0
- PDF下载量: 3
下载:
