Geological Setting of Mineral Occurrences in Fairchild Lake Map Area (106C/13), Wernecke Mountains, Yukon

The Fairchild Lake map area is underlain by two principal sedimentary successions, Middle Proterozoic Wernecke Supergroup and unconformably overlying Middle to Late Proterozoic Pinguicula Group. The angular unconformity between the successions was caused by an intervening period of deformation known as Racklan orogeny. A third succession, herein named the Slab volcanics, is inferred to have been deposited after Racklan orogeny and before Pinguicula Group deposition. Mineralization occurs as sedimentary exhalative, vein, and intrusive breccia occurrences within Wernecke Supergroup. The sedimentary exhalatives contain Zn, Pb, Cu and Ag in shaley horizons within a mainly dolomitic sequence. The vein occurrences contain Zn, Pb, Cu, Ag, Au and U. The intrusive breccias, collectively known as Wernecke breccia, host Cu, Co, U, Ag and Au. Wernecke breccia was probably generated by explosive expansion of volatile-rich fluids. Brecciation was preceded by Racklan orogeny and intrusion of igenous dykes. The dykes and the breccia-related mineralizing fluids may have a common source in postulated underlying magma chambers. Local supergene enrichment of breccia mineralization was caused by Middle to Late Proterozoic weathering before deposition of Pinguicula Group.

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• ygs-import
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Field	Value
Last Updated	October 20, 2025, 02:24 (UTC)
Created	October 20, 2025, 02:24 (UTC)
Domain / Topic Domain or topic of the dataset being cataloged.
Title Title for the Dataset.	Geological Setting of Mineral Occurrences in Fairchild Lake Map Area (106C/13), Wernecke Mountains, Yukon
Description A description of the dataset.	The Fairchild Lake map area is underlain by two principal sedimentary successions, Middle Proterozoic Wernecke Supergroup and unconformably overlying Middle to Late Proterozoic Pinguicula Group. The angular unconformity between the successions was caused by an intervening period of deformation known as Racklan orogeny. A third succession, herein named the Slab volcanics, is inferred to have been deposited after Racklan orogeny and before Pinguicula Group deposition. Mineralization occurs as sedimentary exhalative, vein, and intrusive breccia occurrences within Wernecke Supergroup. The sedimentary exhalatives contain Zn, Pb, Cu and Ag in shaley horizons within a mainly dolomitic sequence. The vein occurrences contain Zn, Pb, Cu, Ag, Au and U. The intrusive breccias, collectively known as Wernecke breccia, host Cu, Co, U, Ag and Au. Wernecke breccia was probably generated by explosive expansion of volatile-rich fluids. Brecciation was preceded by Racklan orogeny and intrusion of igenous dykes. The dykes and the breccia-related mineralizing fluids may have a common source in postulated underlying magma chambers. Local supergene enrichment of breccia mineralization was caused by Middle to Late Proterozoic weathering before deposition of Pinguicula Group.
Tags / Keywords Keywords/tags categorizing the dataset.	Science and Technology ygs-import ygs-import-20250711 ygs-publications yukon-geological-survey
Format (CSV, XLS, TXT, PDF, etc) File format of the dataset.
Dataset Size Dataset size in megabytes.
Metadata Identifier Metadata identifier – can be used as the unique identifier for catalogue entry
Published Date Published date of the dataset.	2011-04-04
Time Period Data Span (start date) Start date of the data in the dataset.
Time Period Data Span (end date) End date of time data in the dataset.
GeoSpatial Area Data Span A spatial region or named place the dataset covers.

Field	Value
Access category Type of access granted for the dataset (open, closed, service, etc).
License License used to access the dataset.	Open Government Licence - Yukon
Limits on use Limits on use of data.
Location Location of the dataset.	https://open.canada.ca/data/en/dataset/120ebb68-d4fe-4fd6-8983-09a8de5cacfd
Data Service Data service for accessing a dataset.
Owner Owner of the dataset.	Government of Yukon | Gouvernement du Yukon
Contact Point Who to contact regarding access?	Yukon Geological Survey
Contact Point Email The email to contact regarding access?
Publisher Publisher of the dataset.
Publisher Email Email of the publisher.	[email protected]
Author Author of the dataset.
Author Email Email of the author.
Accessed At Date the data and metadata was accessed.

Field	Value
Identifier Unique identifier for the dataset.
Language Language(s) of the dataset
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Globally Unique Identifier Data is identified by a persistent and globally unique identifier.
Contains data about individuals Does the data hold data about individuals?
Contains data about identifiable individuals Does the data hold identifiable data about individual?
Contains Indigenous Data Does the data hold data about Indigenous communities?
Portal Type Platform type of the source portal.

Field	Value
Version Version of the datatset	None
Source Source of the dataset.	None
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Other versions Link to datasets that are versions of it.
Provenance Text Provenance Text of the data.
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GeoSpatial resolution in meters Describes how granular (in meters) geospatial data is in the dataset.
GeoSpatial resolution (in regions) Describes how granular (in regions) geospatial data is in the dataset.

Field	Value
Indigenous Community Permission Who holds the Indigenous Community Permission. Who to contact regarding access to a dataset that has data about Indigenous communities.
Community Permission Community permission (who gave permission).
The Indigenous communities the dataset is about Indigenous communities from which data is derived.

Field	Value
Number of data rows If tabular dataset, total number of rows.
Number of data columns If tabular dataset, total number of unique columns.
Number of data cells If tabular dataset, total number of cells with data.
Number of data relations If RDF dataset, total number of triples.
Number of entities If RDF dataset, total number of entities.
Number of data properties If RDF dataset, total number of unique properties used by the triples.
Data quality Describes the quality of the data in the dataset.
Metric for data quality A metric used to measure the quality of the data, such as missing values or invalid formats.

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