Black Hawk mine (Maine)
Maine, Hancock County, United States
Volcanogenic massive sulfidesZn-Cu-Pb-Ag
- Type
- Metamorphosed volcanogenic massive sulfides
Zn-Cu-Pb-Ag deposit of Ordovician (?) age in a dominantly clastic metasedimentary terrane, metamorphosed to greenschist facies. Palmer and Slack (1989, Table 1): tourmaline at -10.52 ‰. Tourmalines of this kind of terrane range from -15.37 to -2.19 ‰ in the article; according to the authors, the boron source (continental crust, entrained seawater, evaporites) matters more than the formation temperature.
δ11B in ‰ (per mil) Values of the same system
Standard : NIST SRM 951
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −10.52 ‰ | 1 | tourmaline of the massive sulfide or associated tourmalinite Single analysis (JS-79-24F). Uncertainties: JS-79-24F -10.52 ± 0.24 ‰. | Palmer & Slack (1989), Boron isotopic composition of tourmaline from massive sulfide depo… |
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- Boliden Sweden
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Cite this page
IsoFind Atlas (2026). Black Hawk mine (Maine), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/mine-de-black-hawk-maine/ (accessed 2026-10-19).
@misc{isofind2026blackhawkminemaineisotopesign,
title = {Black Hawk mine (Maine), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/mine-de-black-hawk-maine/},
note = {Accessed 2026-10-19}
}Updated : 2026-10-19