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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.1
- 수록면
- 701 - 721 (21page)
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초록· 키워드
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We compare the trace element geochemistry of scheelite from the economic Sangdong W-Mo deposit with scheelite from unmineralized or sub-economic prospects in Joongdong and Sangdong area in the southern Taebaeksan metallogenic region, to investigate the ore-forming processes controlling scheelite mineralization and to provide a geochemical model for W exploration. In the Sangdong W-Mo deposit, the Mo substitution into scheelite as a powellite (CaMoO4) component changed colors of scheelite fluorescence under short-wavelength UV from yellow (Mo up to 51,000 μg/g) to blue (Mo up to 3.2 μg/g). Low-Mo scheelite with blue fluorescence occurred in the low-grade periphery of the Sangdong deposit and contained higher concentrations of Sr, possibly indicating a lower degree of fluid-rock interaction of the scheelite-forming fluid with Sr-bearing host. Mo-rich scheelite with yellow fluorescence accumulated in the W-rich center of the Sangdong deposit. Hence, the fluorescence color of scheelite reflected both the fluids oxidation state and the degree of fluid-rock interaction and might be useful for scheelite exploration in the Taebaeksan region. In the Sangdong deposit, Nb concentrations in scheelite were high and negatively correlated with its Eu anomaly values, suggesting extensive batholith-scale fractionation in a large magmatic reservoir. Conversely, much lower Nb concentrations of scheelite in the Joondong area suggests a relatively small or isolated magma reservoir that did not reach the same degree of fractionation at the point of fluid saturation, which would limit the potential for an economic scheelite mineralization. Scheelite Nb/Ta ratio is found to effectively differentiate economic orebodies and subeconomic prospects in the Taebaeksan metallogenic region and might be a useful parameter for scheelite exploration.
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참고문헌 (101)
참고문헌 신청
Anders, E. / 1989 / Abundances of the elements : meteoritic and solar / Geochimica et Cosmochimica Acta 53:197~214
Audétat, A. / 2010 / Source and evolution of molybdenum in the porphyry Mo(-Nb)deposit at Cave Peak, Texas / Journal of Petrology 51:1739~1760
Audétat, A. / 2003 / The magmatic-hydrothermal evolution of two barren granites : a melt and fluid inclusion study of the Rito del Medio and Canada Pinabete plutons in northern New Mexico(USA) / Geochimica et Cosmochimica Acta 67:97~121
Audétat, A. / 2000 / Causes for largescale metal zonation around mineralized plutons : fluid inclusion LA-ICP-MS evidence from the Mole Granite, Australia / Economic Geology 95:1563~1581
Audétat, A. / 2008 / The composition of magmatic-hydrothermal fluids in barren and mineralized intrusions / Economic Geology 103:877~908
Audétat, A. / 2010 / Source and evolution of molybdenum in the porphyry Mo(-Nb)deposit at Cave Peak, Texas / Journal of Petrology 51:1739~1760
Audétat, A. / 2003 / The magmatic-hydrothermal evolution of two barren granites : a melt and fluid inclusion study of the Rito del Medio and Canada Pinabete plutons in northern New Mexico(USA) / Geochimica et Cosmochimica Acta 67:97~121
Audétat, A. / 2000 / Causes for largescale metal zonation around mineralized plutons : fluid inclusion LA-ICP-MS evidence from the Mole Granite, Australia / Economic Geology 95:1563~1581
Audétat, A. / 2008 / The composition of magmatic-hydrothermal fluids in barren and mineralized intrusions / Economic Geology 103:877~908
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