ZHU Fei-lin^{1, 2} , TAO Yan¹ , HU Rui-zhong¹ , LIAO Ming-yang^{1, 2} , WANG Yin-xi³ , LI Yu-bang^{1, 2}

(1. State Key Labor atory of Ore Deposit Geochemistry , Institute of Geochemistry , Chinese Academy of Sciences, Guiyang, 550002 China;
2. Graduate School of the Chinese Academy of Science , Beijing, 100049 China;
3. Center of materials analysis , Nanjing University , Nanj ing, 210093 China)

Abstract: The Luziyuan lead-zinc deposit hosted in the early paleozoic carbonate rocks is an important ore deposit in the Baoshan-Zhenkang block. 10 sulfide mineral separates including sphalerites, chalcopyrites, paragenous related quart z and feldspar were separated by hand picking. Rb-Sr analyses yield an isochron age of 141. 9 +/-2. 6 Ma and an initial 87 Sr/ 86 Sr of 0. 711 85. It reveals that the mineralization is contemporaneous with the closure of the meso-Tethys "Lujiang" ocean and the initial Sr isotopic composition of the deposit ore is analogues to that of the Yanshanian granitoid in the Baoshan- Zhenkang block. It can be concluded that the mineralizat ion is genetically related with the granitic magmatism of orogeny which is responsible to the closure of the Meso-Tethys  "Lujiang" ocean.

Key words: Baoshan-Zhen kang block; Luziyuan Pb-Zn depos it; isochron age; Rb-Sr isotope

 *Corresponding Author, E-Mail: taoyan@vip.gyig.ac.cn

Bulletin of Mineralogy, Petrology and Geochemistry Vol. 30, No.1, 2011, page 73-79

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