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首页> 外文会议>"现代地球科学,交流与合作"国际学术研讨会暨第六届IPACES学术年会 >Multi-spectroscopic Study of Green Quartzite (Guizhou Jade) from the Qinglong Antimony Deposit,Guizhou Province, China
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Multi-spectroscopic Study of Green Quartzite (Guizhou Jade) from the Qinglong Antimony Deposit,Guizhou Province, China

机译：贵州省青龙锑矿床中绿色石英石（贵州玉）的多光谱研究

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摘要

Green quartzlte (also known as "Guizhou Jade") from the Qinglong antimony deposit, Guizhou, China, has been investigated by petrographic observations, trace element analyses, and multi-spectroscopic techniques. Powder X-ray diffraction patterns and infrared absorption and reflectance spectra confirm petrographic observations that the green quartzite is comprised of predominantly microcrystalline quartz and minor a mounts of dickite. Inductively coupled plasma mass spectrometric analyses reveal Cr and V contents up to 78 and 107 ppm, respectively. Optical absorption spectra are composed of two broad bands centered at ～412 nm and ～571 nm, indicative of Cr3+ and V3+ ions in octahedral coordination. Identification of a VO2+ center and two Cr3+ centers by electron paramagnetic resonance spectra confirms the presence of V and Cr in dickite. Therefore, Cr3+ and V5+ ions in octahedral sites in dickite are responsible for the green color of Guizhou Jade, which is not affected by a two-year-long exposure to sunlight.
机译：来自青龙锑矿床的绿色石英（也称为“贵州玉”）已通过岩相观测，痕量元素分析和多光谱技术进行了研究。粉末X射线衍射图以及红外吸收和反射光谱证实了岩相学观察结果，即绿色石英岩主要由微晶石英组成，并有少量的地开石。电感耦合等离子体质谱分析表明，Cr和V的含量分别高达78和107 ppm。光吸收光谱由中心在〜412 nm和〜571 nm的两个宽带光谱组成，表明八面体配位中的Cr3 +和V3 +离子。通过电子顺磁共振波谱确定VO2 +中心和两个Cr3 +中心可确认地开石中存在V和Cr。因此，地开石八面体部位的Cr3 +和V5 +离子是贵州翡翠的绿色，这不受两年的阳光照射的影响。

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