| 光谱学与光谱分析 |
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| Spectral Characteristics and Implications of Quartz from Heliao Lead-Zinc Polymetallic Ore District in the South of Qinzhou-Hangzhou Joint Belt |
| Lü Wen-chao1, 2, YANG Zhi-jun1, 2*, ZHOU Yong-zhang1, 2, LI Hong-zhong3, ZENG Xiang-qing1, CHEN Qing1, 2, LIANG Jin1, 2, ZENG Chang-yu1, 2 |
1. Department of Geoscience, Sun Yat-sen University, Guangzhou 510275, China
2. Guangdong Provincial Key Laboratory of Mineral Resource Exploration & Geological Processes, Guangzhou 510275, China
3. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
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Abstract The XRD, FTIR and Raman spectrum were employed to study the characters of quartz from three types of rock samples, which are mineralized rock sample, near ore body rock sample and far away from ore body rock sample in Heliao lead-zinc polymetallic ore district. The research shows that the quartz in the mineralized rock and far away from ore body rock is pure, while the quartz in near ore body rock contains a small amount of impurities. But such small amounts of impurities did not cause apparent change in the quartz lattice parameters. From far away from ore body rock→near ore body rock→mineralized rock, the crystallinity and order degree of quartz are higher and higher. And the quartz in the mineralized rock has a trend to change into low symmetry quartz. It’s a unique to mineralized rock that the quartz’s absorption peak at 1 050 cm-1 was split into two strongest ones. It can be used as the signs of whether exists mineralization. The cause for the quartz microstructure changes may be related to the activities of late mineralized hydrothermal fluids. Late hydrothermal influence was very weak to the quartz far away from ore body rock. And through the impact of the multi-stage hydrothermal effect, the quartz in mineralized rock may be purified by recrystallization and structural adjustment. However the quartz in near ore body rock didn’t have enough hydrothermal influence, so it’s not pure. Genealogy research technology is a useful technique for in-depth exploration of study area mineralization process and metallogenic regularity.
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Received: 2012-10-08
Accepted: 2013-01-28
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Corresponding Authors:
YANG Zhi-jun
E-mail: yangzhj@mail.sysu.edu.cn
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