中国地质Issue(4)：1124-1135,12.
蒙古国乌兰铅锌矿地质特征、岩石地球化学特征及U-Pb年龄
Geological and rock geochemical characteristics and U-Pb age of the Ullan lead-zinc deposit in Mongolia
摘要
Abstract
The Ullan lead-zinc deposit in Mongolia, together with Tsav, Jiawula, Chaganbulagen lead-zinc deposits, forms a lead-zinc ore concentration area in the Kerulen-Manchuria metallogenic belt. Geological characteristics of the Ullan deposit were described in the aspects of ore-bearing strata, ore-controlling structure, ore-bearing dike, wall rock alteration and orebody characteristics. Rock geochemical studies show that ore-bearing rocks are calc-alkaline volcanic rocks with medium-high Si, medium-Al and high K. The rocks are enriched in large-ion lithophile elements (Ba, Rb, Ce), high field-strength elements (Nb, Ta, Th), Zr and depleted in Li, Sr, Y, with the data∑REE=412.25 × 10-6-999.06 × 10-6,(La/Yb)N=4.41-43.10 and strong Eu anomalies (δ Eu=0.56-0.88). Zircon LA-ICPMS U-Pb isotope ages indicate that wall rocks formed in Late Jurassic (from(150.8±4.4)Ma to (164.7 ± 3.1) Ma). The authors also determined that Ullan lead-zinc deposit was formed in a rift setting after the formation of Transbaikal-Da Hinggan Mountains transpressional arc in the period of 140-155 Ma and hence belongs to the hypabyssal hydrothermal vein-type deposit controlled by explosion breccia.关键词
蒙古国/乌兰铅锌矿/地质特征/岩石地球化学/锆石LA-ICP-MS U-Pb年龄Key words
Mongolia/Ullan lead-inc deposit/geological characteristics/rock geochemistry/zircon LA-ICPMS U-Pb age分类
天文与地球科学引用本文复制引用
张璟,邵军,鲍庆中,周永恒,王宏博..蒙古国乌兰铅锌矿地质特征、岩石地球化学特征及U-Pb年龄[J].中国地质,2014,(4):1124-1135,12.基金项目
中国地质调查局项目（1212011120328）资助。 （）
