| 河北小寺沟蛇纹石玉的矿物成分和化学成分研究 |
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| 引用本文： | 范桂珍,王时麒,刘岩.河北小寺沟蛇纹石玉的矿物成分和化学成分研究[J].岩石矿物学杂志,2011,30(Z1):133-143. |
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| 作者姓名： | 范桂珍 王时麒 刘岩 |
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| 作者单位： | 北大宝石鉴定中心, 北京 100871;北大宝石鉴定中心, 北京 100871;北大宝石鉴定中心, 北京 100871 |
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| 摘 要： | 在野外地质调查的基础上,通过显微薄片观察、电子探针分析、X射线衍射分析、红外光谱分析、X射线荧光光谱分析、微量元素分析、稀土元素分析等现代测试方法对河北小寺沟蛇纹石玉的矿物成分、化学成分进行了研究。结果表明,小寺沟蛇纹石玉为富镁碳酸盐岩蚀变形成的蛇纹岩,其主要矿物成分为利蛇纹石,次要矿物成分有方解石、白云石、透辉石、金云母、磁铁矿、黄铁矿等。蛇纹石玉的稀土元素来源于围岩大理岩,其稀土元素球粒陨石标准化配分图与其围岩大理岩的稀土配分图非常相似,为陡右倾型,具有稀土元素总量较低、富集轻稀土、具δEu负异常的特点。
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| 关 键 词： | 蛇纹石玉 利蛇纹石 富镁碳酸盐岩 小寺沟 河北 |
| 收稿时间： | 2011/6/20 0:00:00 |
| 修稿时间： | 2011/7/7 0:00:00 |
A study of mineral and chemical compositions of Xiaosigou serpentine jade, Hebei Province |
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| FAN Gui-zhen,WANG Shi-qi and LIU Yan.A study of mineral and chemical compositions of Xiaosigou serpentine jade, Hebei Province[J].Acta Petrologica Et Mineralogica,2011,30(Z1):133-143. |
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| Authors: | FAN Gui-zhen WANG Shi-qi and LIU Yan |
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| Institution: | Gems Appraisal Center of Peking University, Beijing 100871, China;Gems Appraisal Center of Peking University, Beijing 100871, China;Gems Appraisal Center of Peking University, Beijing 100871, China |
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| Abstract: | Based on geological field work, the authors studied mineral composition and chemical composition by using modern testing methods of observing microscopic sections and such means as EMPA, XRD, IR, XRF and ICP-MS. The results indicate that the Xiaosigou serpentine jade was formed through alteration of Mg-rich carbonate,and its main mineral is lizardite,and subordinate minerals include calcite, dolomite, diopside, phlogopite, magnetite, pyrite etc. REE of serpentine originated from marble and surrounding rock. The chondrite-normalized REE patterns of Xiaosigou serpentine jade are quite similar to those of sedimentary rocks, with steeply rightly-oblique shape, characterized by low REE amount, rich LREE and negative anomalies. |
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| Keywords: | serpentine jade lizardite Mg-rich carbonate Xiaosigou Hebei Province |
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