Trace-element geochemistry of Archean volcanic rocks and crystal growth in southwestern Abitibi Belt, Canada

Capdevila, Ramon Buxó i; Goodwin, A. M.; Ujike, Osamu; Gorton, Michael P.

doi:10.1130/0091-7613(1982)10<418:tgoavr>2.0.co;2

Cited by 48 publications

(16 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…By analogy with young volcanic suites, rocks from ancient volcanic successions that show light rare earth element (LREE) and large ion lithophile element (LILE) enrichment and Nb-Ta-Ti depletion on normalized plots are commonly of calc-alkaline affinity and so are commonly interpreted to be arc-derived (e.g., Condie 1976;Capdevila et al 1982;Gale and Pearce 1982; but see Pearce 2008). Unfortunately, the way in which rocks were classified as calc-alkaline vs. tholeiitic is rarely specified.…”

Section: Trace Element Criteriamentioning

confidence: 99%

Magmatic affinity of modern and ancient subalkaline volcanic rocks determined from trace-element discriminant diagrams

2009

View full text Add to dashboard Cite

When dealing with ancient subalkaline volcanic rocks, the alkali-total iron-magnesium (AFM) diagram is of limited use in assigning a tholeiitic vs. calc-alkaline affinity because these elements are often mobile during alteration and metamorphism. Classification diagrams using immobile trace elements are preferable, but need to be tested and optimized on unaltered rocks.To this end, a geochemical database containing over a thousand presumed unaltered subalkaline volcanic samples from young oceanic arcs was assembled. The data were classified using both

show abstract

Section: Trace Element Criteriamentioning

confidence: 99%

Magmatic affinity of modern and ancient subalkaline volcanic rocks determined from trace-element discriminant diagrams

2009

View full text Add to dashboard Cite

show abstract

“…Hamilton, 1988). Nevertheless, abundant geochemical (Capdevila et al, 1982;Wyman et al, 1999), stratigraphical , and structural (Chown et al, 1992;Daigneault et al, 2002) evidence, supported by geochronology (Mortensen, 1993), all indicate secular evolution from divergent to convergent environments for individual greenstone belts that comprise the Superior Province.…”

Section: Chapter 7 Discussionmentioning

confidence: 99%

Physical volcanology, stratigraphy, and lithogeochemistry of an archean volcanic arc :

Scott¹

2005

View full text Add to dashboard Cite

show abstract

“…After decades of volcanological, structural, geochemical and stratigraphic research on the BRG (e.g., Conolly and Hart 1936;Dimroth et al 1978;de Rosen-Spence et al 1980;Capdevila et al 1982;Cousineau and Dimroth 1982;Gélinas and Ludden 1984;Hubert et al, 1984;Jensen and Langford 1985;Ujike and Goodwin 1987;Paradis et al 1988;Fowler and Jensen 1989;Laflèche et al 1992aLaflèche et al , 1992bSetterfield et al 1995;Péloquin et al 1996;Wyman and Hollings 2006;Dion and Rhéaume 2007;Rogers et al 2010aRogers et al , 2010b; and other papers cited therein), reconstructing the volcanic architecture of the group as a whole remains a work in progress. Since a lot of the deformation in the BRG is inferred to be tectonic in origin rather then syn-volcanic, significant work is still needed to understand the present-day structural architecture of the BRG.…”

Section: Volcanic Architecture Of the Brgmentioning

confidence: 99%

Basaltic to andesitic volcaniclastic rocks in the Blake River Group, Abitibi Greenstone Belt: 1. Mode of emplacement in three areas¹This article is a companion paper to Ross et al. 2011. Basaltic to andesitic volcaniclastic rocks in the Blake River Group, Abitibi Greenstone Belt: 2. Origin, geochemistry, and geochronology. Canadian Journal of Earth Sciences, 48: this issue.²MRNF Contribution BEGQ 8439-2010/2011-1. Natural Resources Canada, Earth Science Sector Contribution 20100253.

et al. 2011

View full text Add to dashboard Cite

In the Archean Blake River Group, mafic to intermediate fragmental units have controversially been proposed to have formed during the collapse of a giant submarine caldera. This paper describes and interprets these rocks, summarizing their physical characteristics, inferred origins, age relationships, and geochemical signatures. The widespread Stadacona member, south of Rouyn-Noranda, consists of several hundred meters of bedded volcaniclastic rocks interpreted to have been mostly deposited from aqueous density currents fed directly by explosive eruptions. The magmas involved in these eruptions were plagioclase-phyric tholeiitic to transitional basalts. The similarly widespread D'Alembert tuff, in the northern part of the Blake River Group, shares many physical characteristics with the Stadacona member and is thought to have a similar origin. However, the D'Alembert tuff is approximately six million years younger than the Stadacona member. It is composed mostly of transitional to calc-alkaline andesites and basaltic andesites with very distinct trace element profiles. Volcaniclastic rocks from other areas, such as Tannahill Township in Ontario and the Monsabrais area in Québec, are interpreted to represent mostly in situ to remobilized hyaloclastite, with no explosive eruptions involved in their genesis. Our observations and interpretations are not compatible with models in which the volcaniclastic units are emplaced during a catastrophic event in relation with the collapse of a giant caldera. Instead, the fragmental rocks were produced by various mechanisms at many distinct times during the evolution of the Blake River Group.

show abstract

Trace-element geochemistry of Archean volcanic rocks and crystal growth in southwestern Abitibi Belt, Canada

Cited by 48 publications

References 0 publications

Magmatic affinity of modern and ancient subalkaline volcanic rocks determined from trace-element discriminant diagrams

Magmatic affinity of modern and ancient subalkaline volcanic rocks determined from trace-element discriminant diagrams

Physical volcanology, stratigraphy, and lithogeochemistry of an archean volcanic arc :

Contact Info

Product

Resources

About