Laser ablation inductively coupled plasma mass spectrometry study on fluid inclusions of the Baiyinnuo'er skarn Zn-Pb deposit, North-east China

Shu, Q., Hammerli, J., Chang, Z., Lai, Y., and Huizenga, J-M. (2015) Laser ablation inductively coupled plasma mass spectrometry study on fluid inclusions of the Baiyinnuo'er skarn Zn-Pb deposit, North-east China. In: Proceedings of PACRIM 2015, pp. 451-456. From: PACRIM 2015 Congress, 18-21 March 2015, Hong Kong, China.

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Abstract

The Baiylimuo' er Zn-Pb deposit is a typical skarn deposit in NE China. Skarn and orebodies mainly occur between different units of the Lower Permian Huanggangliang Formation carbonates-sandstone-mudstone or within the contact between intrusions and marble. Skarn minerals are dominated by prograde garnet and clinopyroxene, and the main ore minerals are sphalerite and galena. We conducted single fluid inclusion compositional studies using laser ablation inductively coupled plasma mass spectrometry on clinopyroxene (pre-orestage mineral) and sphalerite and calcite (syn-ore-stage minerals). The results show that the Baiylimuo' er fluids are distinctly different from basinal brine but similar to magmatic fluid, thereby indicating that the deposit has a dominantly magmatic origin. This interpretation has also been supported by the O/Br mole ratios, which remain stable (~500) in different fluid stages. The decreases for most of the elements in the fluid inclusions from pre-ore-stage clinopyroxene to syn-ore-stage sphalerite and calcite suggest that mixing with groundwater has occurred during mineralisation, with significant Zn, Pb and Ag deposition.

Item ID: 38257
Item Type: Conference Item (Refereed Research Paper - E1)
ISBN: 978-1-925100-25-9
Funders: Society of Economic Geologists, James Cook University (JCU)
Projects and Grants: JCU Postgraduate Research Grant
Date Deposited: 16 Jun 2015 04:01
FoR Codes: 04 EARTH SCIENCES > 0403 Geology > 040307 Ore Deposit Petrology @ 100%
SEO Codes: 84 MINERAL RESOURCES (excl. Energy Resources) > 8401 Mineral Exploration > 840108 Zinc Ore Exploration @ 70%
84 MINERAL RESOURCES (excl. Energy Resources) > 8401 Mineral Exploration > 840199 Mineral Exploration not elsewhere classified @ 30%
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