scholarly journals Editorial for Special Issue “Minerals of the Southern Grenville Province”

Minerals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 252
Author(s):  
George W. Robinson ◽  
Jeffrey R. Chiarenzelli ◽  
Marian V. Lupulescu
Keyword(s):  
Mineral Species ◽  
Special Issue ◽  
Grenville Province

The southern Grenville Province is famous for both the large number of mineral localities and the diversity of the mineral species found [...]

scholarly journals Editorial for Special Issue “New Mineral Species and Their Crystal Structures”

Minerals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 106
Author(s):  
Irina Galuskina ◽  
Igor Pekov
Keyword(s):  
Crystal Structures ◽  
Mineral Species ◽  
New Mineral ◽  
Special Issue ◽  
New Mineral Species

Mineralogy is the oldest and one of the most important sciences of the geological cycle [...]

scholarly journals Editorial for Special Issue “Mineralogy of Meteorites”

Minerals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 363
Author(s):  
Victor V. Sharygin
Keyword(s):  
Mineral Species ◽  
Special Issue ◽  
Different Types

Over 435 mineral species have been found in different types of meteorites (updated list for 2016) [...]

Upper-crustal orogenic lid and mid-crustal core complexes: signature of a collapsed orogenic plateau in the hinterland of the Grenville Province 1This article is one of a series of papers published in CJES Special Issue: In honour of Ward Neale on the theme of Appalachian and Grenvillian geology.

2012 ◽  
Vol 49 (1) ◽  
pp. 1-42 ◽  
Author(s):  
Toby Rivers
Keyword(s):  
High Strain ◽  
Numerical Models ◽  
Pure Shear ◽  
Granulite Facies ◽  
Lower Grade ◽  
Conductive Heat ◽  
Upper Crust ◽  
Special Issue ◽  
Grenville Province ◽  
Orogenic Plateau

This paper provides a re-interpretation of the crustal architecture of the Ottawan hinterland of the Grenville Province in light of published empirical and numerical models of orogenic collapse. It is now seen as a series of high-grade, mid-crustal core complexes from tens to hundreds of kilometres across that are juxtaposed against segments of the lower grade upper and uppermost crust including the orogenic lid. Juxtaposition of such contrasting crustal levels, which exhibit decoupled tectonic styles corresponding to the orogenic infrastructure and suprastructure, respectively, is interpreted as a signature of the foundering of an orogenic plateau into a mid-crustal channel. Ottawan metamorphism progressed from granulite-facies in the mid crust at ∼1090–1050 Ma, through amphibolite-facies in the upper crust at ∼1050–1020 Ma, to heating to ≤500 °C in the uppermost crust at ∼1020–980 Ma. This temporal progression is interpreted to reflect conductive heat transfer during collapse, as hot mid-crustal core complexes were exhumed against successively higher crustal levels. Exhumation was facilitated by substantial thinning and lengthening of the mid crust by simple- and pure-shear mechanisms. This was accompanied by wholesale boudinage of the brittle uppermost crust. Moreover, it may have resulted in excision of part of the ductile upper crust, which appears under-represented. Collapse was accompanied by diverse magmatic and hydrothermal products, their range of structural states implying that high-strain Ottawan deformation in the mid crust took place beneath an orogenic lid that was not penetratively deformed. Preliminary analysis indicates the Grenvillian inliers exhibit a comparable range of crustal levels to the Grenville Province, suggesting the orogenic plateau may have extended ∼5000 km along strike from Labrador to Texas.

Evidence for post-1200 Ma — pre-Grenvillian supracrustal rocks in the Pinware terrane, eastern Grenville Province at Battle Harbour, LabradorThis article is one of a series of papers published in this Special Issue on the theme of Geochronology in honour of Tom Krogh.

2011 ◽  
Vol 48 (2) ◽  
pp. 371-387 ◽  
Author(s):  
Sandra L. Kamo ◽  
Larry M. Heaman ◽  
Charles F. Gower
Keyword(s):  
Extended Period ◽  
Mafic Rock ◽  
Amphibolite Facies ◽  
Special Issue ◽  
Supracrustal Rock ◽  
Grenville Province ◽  
Crustal Level ◽  
Minor Extent ◽  
Silicate Rocks

U–Pb zircon geochronological investigations at Battle Harbour, in the Pinware terrane, eastern Grenville Province show that a cross-bedded psammitic rock from Battle Island was deposited after 1200 Ma and prior to Grenvillian orogenesis, as part of a package of psammitic, semi-pelitic and calc-silicate rocks. This represents a major finding as no previous data had indicated any supracrustal-rock deposition after ca. 1500 Ma in the interior eastern Grenville Province. The age is comparable to that obtained from supracrustal units of minor extent elsewhere in the interior Grenville Province, indicating that change in crustal level in these regions was modest during Grenvillian orogenesis. Grenvillian metamorphism at amphibolite facies occurred at 1030 ± 4 Ma, based on evidence from a concordant mafic rock within the supracrustal assemblage that is interpreted to be a sill. Grenvillian orogenesis at Battle Harbour was accompanied by abundant pegmatite injection over an extended period, as indicated by cross-cutting relationships and various states of deformation displayed by the pegmatites. An amazonite-bearing pegmatite has an age of 1024 ± 3 Ma. An even younger, cross-cutting pegmatite contains only inherited zircon grains.

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