| REE Geochemical Characteristics of Tungsten Minerals as a Discriminant Indicator of Genetic Types of Ore Deposits |
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| 摘 要： |
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| 关 键 词： | 稀土元素地球化学特征 金属矿床 分布特征 钨矿床 钨矿物 找矿标志 |
REE geochemical characteristics of tungsten minerals as a discriminant indicator of genetic types of ore deposits |
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| Authors: | Zhang Yuxue Liu Yimao Gao Sideng He Qiguang |
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| Institution: | (1) Institute of Geochemistry, Academia Sinica, China |
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| Abstract: | Tungsten minerals (scheelite and wolframite) from two genetic types of granitoids show significant differences in REE distribution,
probably due to different material sources and origins. Tungsten minerals in granite porphyry of the crust-mantle source are
relatively high in ΣREE(1884ppm on average). Σ Ce is rich relative to Σ Y and Σ Ce/ΣY is relatively high (>1). The chondrite-normalized
REE distribution patterns are characterized by a group of rightward-inclined curves. Tungsten minerals in quartz veins intruding
the granites of crust origin have lower ΣREE (335 ppm on average). ΣY is rich relative to ΣCe and ΣCe/ΣY is relatively low
(<1). The chondrite-normalized REE distribution patterns are characterized by a group of leftward-inclined curves. So the
REE distribution patterns can be used to discriminate the sources of rock-and ore-forming materials and the genetic types
of W deposits so as to provide clues to ore prospecting. |
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