Contrasted sources of metals between small and giant sediment-hosted Pb-Zn deposits in the San Vicente district, Peru
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Date
2023
Publication Type
Other Conference Item
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yes
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Abstract
The source of metals (Zn-Pb) in carbonatehosted, Mississippi Valley-type deposits can be traced through Pb isotopic fingerprinting of ore minerals (sulphides). In this work we revisit the Pb isotopic systematic of the giant Zn-Pb deposit of San Vicente Peru, in light of an updated methodological and conceptual framework. Our new, high-precision (ID-TIMS) Pb isotopic dataset allows a distinction between different mineralization localities and stages in the San Vicente district. The largest deposit, San Vicente, displays a much wider range of radiogenic Pb compositions (Pb-206/Pb-204 = 18.8-19.3) than smaller mineralized occurrences, which form two clusters at less radiogenic Pb values (Pb-206/Pb-204 = 18.8-18.9 and similar to 18.6). While a more expansive study of potential regional source rocks is required to trace metal transport in the district, this dataset already confirms the growing body of evidence for a more diverse source of metals in giants than in small MVT deposits.
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published
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Book title
Proceedings of the 17th SGA Biennial Meeting. Volume 2
Journal / series
Volume
Pages / Article No.
342 - 345
Publisher
Society for Geology Applied to Mineral Deposits
Event
17th Biennial SGA Meeting (SGA 2023)