Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

George W. MacLeod mine, McMurray Township, Algoma District, Ontario, Canada

This page is currently not sponsored. Click here to sponsor this page.
 
 
Multiple ore zones of the Helen Iron Range have operated at different times under a variety of names by the Algoma Steel Corporation and affiliated companies. 1953: Algoma Ore Properties - No. 5 shaft started and reaches 283 (eventually the Macleod production shaft), surface diamond drilling. 1954: Algoma Ore Properties - No. 5 shaft to 1895 feet, 1800 foot long inclined tramway driven and tied to aerial tramway. 1955: Algoma Ore Properties - No. 5 shaft to 2066 feet, tramway extended to 4410 feet. 1956: Algoma Ore Properties - construction of new sintering plant. 1957-59: Algoma Ore Properties - underground tramway extended to 4877 feet, surface diamond drilling. 1960: Algoma Ore Properties - production from old Helen ore body ceases, production from G. W. Macleod Mine begins. 1998: G. W. Macleod Mine closes and mine rehabilitation begins.

The Helen Iron Range is one of 32 separate iron ranges that make up the Michipicoten Iron Formation. This iron formation caps the 2750 Ma volcanic cycle in the Wawa area and represents a period of considerable chemical and clastic sedimentation. The iron range is terminated by the Talbot lake Fault at the west end and the Wallbank lake Fault at the east. The great thickness of the iron formation at its west end is due to tectonic activity along the Talbot Lake Fault which thickened the iron formation by drag folding.
All five facies are developed in this iron formation, however, all mining at the Macleod Mine has taken place in the carbonate (siderite) facies. A chert horizon lies between the siderite and the footwall volcanic rocks. This unit is not observed in any of the other iron ranges. Some chert and argillite has also been reported at the base of the carbonate facies. Their presence may be due to tectonic activity along the Talbot Fault.

Mineral List



9 entries listed. 9 valid minerals.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Rocks & Min.:59:205-207.
Ontario Ministry of Northern Development and Mines MDI Number: MDI42C02SW00004

Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2015, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: March 29, 2015 18:28:30 Page generated: January 11, 2015 19:31:38