+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Metamorphism in the Agnew Lake Area, Sudbury District, Ontario, Canada

Metamorphism in the Agnew Lake Area, Sudbury District, Ontario, Canada

Geological Society of America Bulletin 75(10): 1011-1030

Mafic igneous, pelitic metasediments, and quartzo-feldspathic rocks were metamorphosed in the range from greenschist to lower almandine-amphibolite facies; chlorite-biotite, garnet, chloritoid, and staurolite zones are recognized. Changes in assemblages with grade are depicted by equations and petrographic diagrams, and assemblages are classified into subfacies. Fabric studies indicate three events--an early plastic deformation with development of low grade assemblages followed by a static environment and high grade phases, and finally a late brittle deformation with minor retrograde effects. Partitioning of various trace elements among coexisting phases is discussed. Pyrrhotite compositions suggest metamorphic temperatures of 400 degrees C-570 degrees C for the higher grade rocks, and a gradient of 75 degrees C-150 degrees C per km. Sources of thermal energy are considered. The age of the metamorphism was about 1,600 m.y. by radiometric dating.

Please choose payment method:

(PDF emailed within 1 workday: $29.90)

Accession: 019408255

Download citation: RISBibTeXText

Related references

The distribution of halogens in the Sudbury breccia matrix as pathfinder elements for footwall Cu-PGE mineralization in the Fraser copper zone, Onaping-Levack area, Sudbury District, Ontario, Canada. Pages 96 2002, 2002

Rush Lake area, Sudbury District, Ontario. Summary Report of the Geological Survey of Canada: 38-82, 1934

Lake sediment records of industrialization in the Sudbury area of Ontario, Canada. Abstracts with Programs - Geological Society of America 17(7): 615, 1985

Coexisting chloritoid and staurolite and the staurolite-chlorite isograd from the Agnew lake area, Ontario, Canada. Geological Magazine 108(3): 205-219, 1971

Huronian stratigraphy and paleocurrent analysis in the Espanola-Willisville area, Sudbury District, Ontario, Canada. Journal of Sedimentary Petrology 38(3): 920-942, 1968

Fluid chemistry in auriferous quartz-stockwork breccia zone and albitite from Wanapitei Lake area, Sudbury District, Ontario. Program with Abstracts - Geological Association of Canada(Mineralogical Association of Canada(Canadian Geophysical Union, Joint Annual Meeting 19: 20, 1994

Composition of middle Precambrian uraniferous conglomerate in the Elliot Lake-Agnew Lake area of Canada. Precambrian Research 12(1-4): 375-392, 1980

Fate of the Sudbury dykes in the Tyson Lake area south of Sudbury, Ontario; implications for Grenville Front history and the origin of coronites of high-grade terranes. Program with Abstracts Geological Association of Canada; Mineralogical Association of Canada; Canadian Geophysical Union, Joint Annual Meeting: 11, 1991

On gersdorffite in the Falconbridge ore deposit, Sudbury District, Ontario, Canada. K Nederlands Akad, 1941

The uranium content of waters from the Elliot Lake area, northern Ontario, Canada; uranium mining district, Georgian Bay and Lake Huron. Uranium 4(3): 227-244, 1988

The structural geology of the Sudbury-McGregor Bay District, Ontario, Canada; a rejoinder. Geologische Rundschau 64(1): 998-1002, 1975

The Long Lake diorite and associated rocks, Sudbury District, Ontario. Journal of Geology 42(1): 23-44, 1934

Geneva map area, Sudbury District, Ontario. Summary Report of the Geological Survey of Canada: 7-18, 1921