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.

我们比较了经济型Sangdong W-Mo矿床中的白钨矿的微量元素地球化学与太白山成矿区南部的Joongdong和Sangdong地区的未矿化或次经济前景的白钨矿，研究了控制白钨矿成矿的成矿过程并提供W勘探的地球化学模型。在Sangdong W-Mo矿床中，Mo被取代为白钨矿中的一种辉绿岩（CaMoO ₄）组分在短波长紫外线下将白钨矿荧光的颜色从黄色（Mo高达51,000 µg / g）变为蓝色（Mo高达3.2 µg / g）。具有蓝色荧光的低钼白钨矿发生在桑东矿床的低品位外围，并且含有较高的Sr浓度，这可能表明白钨矿形成流体与含Sr主体的流体-岩石相互作用程度较低。富含钼的白钨矿，在Sangdong矿床的富W中心堆积有黄色荧光。因此，白钨矿的荧光色既反映了流体的氧化态，又反映了流体与岩石的相互作用程度，可能对太白山地区的白钨矿勘探有用。在山东矿床中，白钨矿中的Nb含量较高，并且与Eu异常值呈负相关，暗示在大型岩浆储层中进行了广泛的岩基级分馏。相反，Joondong地区白钨矿中Nb的浓度低得多，这表明相对较小或孤立的岩浆储层在流体饱和点未达到相同的分馏程度，这将限制经济型白钨矿成矿的潜力。白钨矿的铌/钽比可以有效地区分太白山成矿区的经济矿体和次经济前景，可能是白钨矿勘探的有用参数。这将限制经济性白钨矿成矿的潜力。白钨矿的铌/钽比可以有效地区分太白山成矿区的经济矿体和次经济前景，可能是白钨矿勘探的有用参数。这将限制经济性白钨矿成矿的潜力。白钨矿的铌/钽比可以有效地区分太白山成矿区的经济矿体和次经济前景，可能是白钨矿勘探的有用参数。