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TitleControls on indium mineralisation in tin-tungsten-base metal deposits of the Canadian Appalachians
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorGoeddeke, C R; Chapman, J BORCID logo; Samson, I M
SourceTGI 4 - Intrusion Related Mineralisation Project: new vectors to buried porphyry-style mineralisation; by Rogers, N (ed.); Geological Survey of Canada, Open File 7843, 2015 p. 101-110, Open Access logo Open Access
LinksCanadian Database of Geochemical Surveys, downloadable files
LinksBanque de données de levés géochimiques du Canada, fichiers téléchargeables
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in TGI 4 - Intrusion Related Mineralisation Project: new vectors to buried porphyry-style mineralisation
File formatpdf
ProvinceNew Brunswick; Nova Scotia
NTS21A; 21H; 21G
AreaMount Pleasant; Appalachians
Lat/Long WENS -68.0000 -64.0000 46.0000 44.0000
Lat/Long WENS -56.5000 -55.0000 48.0000 47.5000
Lat/Long WENS-124.0000 -120.0000 53.0000 50.0000
Lat/Long WENS -78.4000 -78.4000 48.2833 48.2167
Subjectseconomic geology; metallic minerals; geochemistry; mineralogy; porphyry deposits; porphyry copper; mineral exploration; mineralization; alteration; tungsten; molybdenum; tin; bismuth; bulk samples; mineral deposits; structural interpretations; molybdenite; intrusive rocks; granitic rocks; petrogenesis; copper; gold; igneous rocks; indium; Sisson deposit; Mount Pleasant deposit; South Mountain Batholith
Illustrationslocation maps; photographs; photomicrographs; cross-sections; ternary diagrams
ProgramTargeted Geoscience Initiative (TGI-4) Intrusion/Porphyry Ore Systems
Released2015 06 11; 2023 03 17
AbstractIndium is a minor but potentially economically significant component of the ore metal tenor of many porphyry-style, stockwork and polymetallic vein-type Sn-W and Sn-base metal deposits of the Canadian Appalachians. However, indium distribution between deposits is highly uneven, and whereas some deposits contain hundreds of kilograms of the metal at grades sufficient to justify recovery, others are near-barren. In order to investigate the fundamental temperature, mineralogical, spatial and chemical controls on indium mineralisation in the district, this study has taken samples from indium rich and poor occurrences at 10 drilled prospects in southern New Brunswick and southwest Nova Scotia, as well as from the past-producing East Kemptville Mine in Nova Scotia.
Detailed mineralogical characterization of these materials has shown that, contrary to existing models, within this district indium is commonly introduced early in the deposit paragenesis, presumably as a component of the initial, high-temperature magmatic-hydrothermal fluids. During this phase of mineralisation, indium is dominantly precipitated within copper-rich sphalerite, and it is the distribution of this mineral phase that primarily governs the presence or absence of indium within a mineralised body. During later cooling of the deposit a proportion of the indium is exsolved from sphalerite during recrystallization, and forms lamellae of a sulphide mineral that resembles sakuraiite in the core zones of many individual sphalerite.
Summary(Plain Language Summary, not published)
The Targeted Geoscience Initiative (TGI-4) is a collaborative federal geoscience program that provides industry with the next generation of geoscience knowledge and innovative techniques to better detect buried mineral deposits, thereby reducing some of the risks of exploration. This volume summarises research activities completed under the TGI 4 Intrusion Related Mineralisation Project that focused on porphyry-style ore systems related to the Cu- and Cu-Mo deposits of South-Central British Columbia and the Sn-W-Mo-In deposits in New Brunswick, Nova Scotia and Newfoundland.

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