铅锌矿床中微量元素富集贫化规律研究——以福建丁家山铅锌矿和江苏甘家巷铅锌矿为例

Enrichment and Depletion Regularities of Trace Elements in Pb- Zn Deposits: Examples from the Dingjiashan Pb- Zn Mine in Fujian Province and Ganjiagang Pb- Zn Mine in Jiangsu Province

依据福建丁家山和江苏甘家巷铅锌矿床试验资料,探讨了铅锌矿床中微量元素的富集贫化规律。在两个铅锌矿床中,除存在成矿元素及其伴生元素的富集以外,还存在着部分亲石分散元素、铁族元素、稀土元素等的贫化。发生贫化的微量元素因矿床而异,既有共性又有特殊性。Ba等微量元素在铅锌矿床中显著贫化并且随着Pb矿化增强贫化程度增强的规律,可以作为判断铅锌矿的地球化学异常的成矿前景。此项研究成果为实现地球化学勘查指标的定量化提供了基础。

This study discussed the enrichment and depletion regularities of trace elements in the Dingjiashan Pb- Zn deposit in Fujian and Ganjiagang Pb- Zn deposit in Jiangsu. In the both deposits,there is not only the enrichment of some metallogenic elements but also the depletion of some lithophile-dispersed elements and rare elements. The characteristics of the depleted trace elements vary from one deposit to another,with both similarities and particularities. Some trace elements,such as Ba,are significantly depleted,and their depletion degrees gradually increase with the intensification of Pb mineralization. The results of this study can provide a basis for realizing the quantification of indicators in geochemical exploration.