Stratigraphy of Superior - Type Iron - Formations in the Schefferville - Knob Lake area of Quebec and Labrador

1967 ◽  
Author(s):  
I S Zajac
Keyword(s):  
Lake Area ◽  
Iron Formations ◽  
Superior Type

Grenville iron-formations and associated stratiform zinc mineralization, Roddick Lake area, Mount Laurier Basin, Quebec

1982 ◽  
Vol 19 (8) ◽  
pp. 1670-1679 ◽  
Author(s):  
Alex C. Brown
Keyword(s):  
Lake Area ◽  
Western Margin ◽  
Iron And Zinc ◽  
Iron Deposits ◽  
Iron Formations ◽  
Basin Margin ◽  
Zinc Deposits

Small iron-formations in Grenville metasediments have been examined as possible lateral stratigraphic equivalents of stratiform zinc deposits located along the western margin of the Mount Laurier Basin in the Maniwaki–Gracefleld area, Quebec. Similarities in carbonate and amphibolite units hosting the iron and zinc deposits tend to confirm this concept. Sphalerite sparsely disseminated along a dolomitic bed adjacent to the iron-formations, and the iron-formations themselves, are interpreted as the distal extremities of the massive sphalerite lenses found in the proximity of thick amphibolitic strata close to the (fault-bounded?) basin margin. A submarine exhalative model generating proximal zinc and distal iron deposits is proposed to explain this metal zoning. Originally the iron-formations probably consisted of sedimentary siderite that has been transformed under intense metamorphism to the present magnetite–graphite assemblage.

BRAZILIAN IRON FORMATIONS AND THEIR GEOLOGICAL SETTING

2000 ◽  
Vol 30 (2) ◽  
pp. 274-278 ◽  
Author(s):  
CARLOS ALBERTO ROSIÈRE ◽  
FARID CHEMALE JR
Keyword(s):  
Geological Setting ◽  
Iron Formations

Bedrock geology of the Grand Lake area, Maine

1964 ◽  
Author(s):  
David Marcel Larrabee ◽  
Donald J.P. Swift
Keyword(s):  
Lake Area ◽  
Bedrock Geology
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