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  5. Enhancing current understanding of Irish Zn-Pb mineralization: a closer look at the Island Pod orebody, Lisheen deposit
 
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Enhancing current understanding of Irish Zn-Pb mineralization: a closer look at the Island Pod orebody, Lisheen deposit

Author(s)
Doran, Aileen  
Menuge, Julian  
Hollis, Steven P.  
Güven, John  
Dennis, Paul  
Uri
http://hdl.handle.net/10197/9362
Date Issued
2017-08-23
Date Available
2018-05-08T11:32:30Z
Abstract
Irish-type deposits are a series of Zn-Pb orebodies, formed from the carbonate replacement of Lower Carboniferous limestone, triggered primarily by fluid mixing. Current understanding of the complex fluid flow and mixing dynamics associated with mineralization is limited. By applying clumped O-C isotope analysis to these deposits, these processes can be constrained. Preliminary paragenetic studies of the Island Pod orebody (0.4 Mt @ 20% Zn & 1.6% Pb) have yielded textural evidence for early fluid mixing of sulphide-rich fluids, in a quiescent, far-from equilibrium environment, resulting in the rapid precipitation of dendritic galena and intergrowths of dolomite and sphalerite. Initial clumped O-C analysis has revealed temperatures of 100-170°C for hanging-wall white matrix breccias that accompanied ore formation. This technique will be used to constrain temperature variations across the orebody, thus yielding information on how the fluid evolved as precipitation continued. A more detailed paragenetic study is underway and will form the foundation of future clumped O-C isotope and Zn-Cu-S isotope analysis.
Sponsorship
European Commission - European Regional Development Fund
Science Foundation Ireland
Type of Material
Conference Publication
Publisher
Society for Geology Applied to Mineral Deposits
Subjects

O-C isotope

Zinc

Lead

Orebodies

Web versions
http://sga2017.ca/
Language
English
Status of Item
Peer reviewed
Conference Details
SGA Quebec 2017 14th Biennial Meeting, Quebec City, Canada, August 20-23 2017
This item is made available under a Creative Commons License
https://creativecommons.org/licenses/by-nc-nd/3.0/ie/
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52_Doran_et_al_17_SGA_Quebec-FINAL.pdf

Size

529.15 KB

Format

Adobe PDF

Checksum (MD5)

e90c5776697a26ef9fac1a4a961b1a56

Owning collection
Earth Sciences Research Collection
Mapped collections
ICRAG Research Collection

Item descriptive metadata is released under a CC-0 (public domain) license: https://creativecommons.org/public-domain/cc0/.
All other content is subject to copyright.

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