scholarly journals Mineralogical and Thermal Zoning Associated With Granitic Intrusions in southwestern Canadian Appalachians: Vein Mineral Zoning and Fluid Inclusion Investigation of the Woodstock Mineral District, New Brunswick

1990 ◽  
Author(s):  
K Stevens
Keyword(s):  
Fluid Inclusion ◽  
New Brunswick ◽  
Granitic Intrusions ◽  
Vein Mineral ◽  
Mineral Zoning ◽  
Mineral District ◽  
Canadian Appalachians

Late Silurian-Early Devonian slab break-off beneath the Canadian Appalachians: Insights from the Nashwaak Granite, west-central New Brunswick, Canada

Lithos ◽  
2020 ◽  
Vol 358-359 ◽  
pp. 105393 ◽  
Author(s):  
Wei Zhang ◽  
David R. Lentz ◽  
Kathleen G. Thorne ◽  
Ronald J.R. Massawe
Keyword(s):  
New Brunswick ◽  
Early Devonian ◽  
West Central ◽  
Canadian Appalachians

scholarly journals Mineral chemistry, fluid inclusion and stable isotope studies of the Suyoc epithermal veins: Insights to Au-Cu mineralization in southern Mankayan Mineral District, Philippines

2021 ◽  
Vol 131 ◽  
pp. 104035
Author(s):  
Omar B. Soberano ◽  
Jillian Aira S. Gabo-Ratio ◽  
Karlo L. Queaño ◽  
Carla B. Dimalanta ◽  
Graciano P. Yumul ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Fluid Inclusion ◽  
Mineral Chemistry ◽  
Isotope Studies ◽  
Mineral District

The position and nature of the Gander–Avalon boundary, southern New Brunswick, based on geochemical and isotopic data from granitoid rocks

1996 ◽  
Vol 33 (2) ◽  
pp. 129-139 ◽  
Author(s):  
Joseph B. Whalen ◽  
Leslie R. Fyffe ◽  
Frederick J. Longstaffe ◽  
George A. Jenner
Keyword(s):  
Nova Scotia ◽  
New Brunswick ◽  
Boundary Zone ◽  
Isotopic Data ◽  
Volcanic Arc ◽  
Isotopic Signatures ◽  
Basement Rocks ◽  
Granitoid Rocks ◽  
T Values ◽  
Canadian Appalachians

In southern New Brunswick, the Gander–Avalon boundary is obscured by boundary-parallel faults and various cover sequences. Siluro-Devonian granites, which intrude unequivocal Gander or Avalon rocks, display exclusively negative (−1.9 ± 1.0) and positive (+1.9 ± 0.7) εNd(T) signatures, respectively. Such contrasting Nd isotopic signatures, combined with other geochemical differences between plutons, are potentially valuable tools for terrane analysis. Nine small Devonian plutons intruding the boundary zone fall into contrasting geochemical groups with (La/Lu)N <4 and >4. The former are topaz-bearing granites, while the latter are volcanic-arc-type granites. Except for one pluton, with an εNd(T) signature of –2.0, εNd(T) values range from –0.4 to +0.7, spanning the gap between "type" Avalon and "type" Gander plutons. These results suggest the plutons sampled either (i) stratigraphically overlapping or tectonically interleaved Gander and Avalon basement rocks, or (ii) a distinct basement source beneath the boundary zone. Our results demonstrate that the Gander–Avalon boundary in southern New Brunswick is not a simple throughgoing crustal fault, and that the Gander and Avalon zones are underlain by different continental basement blocks. Comparison with results from Newfoundland and Nova Scotia suggests that these basement blocks are continuous throughout the Canadian Appalachians.

Collision along an irregular margin: a regional plate tectonic interpretation of the Canadian Appalachians

1987 ◽  
Vol 24 (6) ◽  
pp. 1098-1107 ◽  
Author(s):  
G. S. Stockmal ◽  
S. P. Colman-Sadd ◽  
C. E. Keen ◽  
S. J. O'Brien ◽  
G. Quinlan
Keyword(s):  
New Brunswick ◽  
Seismic Reflection ◽  
Plate Tectonic ◽  
Tectonic Model ◽  
Iapetus Ocean ◽  
Irregular Margin ◽  
Surface Geology ◽  
Subducting Slab ◽  
Tectonic Interpretation ◽  
Canadian Appalachians

An idealized plate tectonic model for the pre-Carboniferous development of the Canadian Appalachians explains the 400 km dextral offset of tectonostratigraphic zones from Quebec and northern New Brunswick to Newfoundland and the up to 600 km offset of oppositely verging belts of Acadian deformation from the Gaspé Peninsula to eastern Newfoundland. It is proposed that these offsets, which occur at the St. Lawrence promontory, result from the collision of an irregular North American passive continental margin with island arc and continental crust to the east, along an east-dipping subduction zone. The line of subduction is assumed to have been linear and the subducting slab to have maintained its mechanical integrity during collision. A "jigsaw fit" of the opposite sides of the Iapetus Ocean is made unnecessary by invoking lithospheric delamination and tectonic wedging during the Acadian orogeny in Newfoundland. The model is consistent with surface geology and recent deep seismic reflection observations from north of Newfoundland.

Tectonic and paleogeographic significance of Late Ordovician conodonts in the Canadian Appalachians

1997 ◽  
Vol 34 (11) ◽  
pp. 1521-1537 ◽  
Author(s):  
Godfrey S. Nowlan ◽  
Alexander D. McCracken ◽  
Malcolm J. McLeod
Keyword(s):  
New Brunswick ◽  
Deep Water ◽  
Late Ordovician ◽  
Orogenic Belt ◽  
Eastern Canada ◽  
Global Pattern ◽  
Iapetus Ocean ◽  
Group A ◽  
Sedimentary Succession ◽  
Canadian Appalachians

Conodonts of Late Ordovician age are well represented in Laurentian parts of eastern Canada, but are rare in the Appalachian orogenic belt. They are known from the Anticosti Basin, the Matapedia Belt, and the Exploits Subzone of the Dunnage Zone. Two new discoveries are described: one from unnamed strata on Markey Brook, west-central New Brunswick, and one from the Goss Point Formation (Avalon Zone, southwestern New Brunswick). Faunas from the Anticosti Basin are of undoubted Midcontinent Faunal Region affinity. Those from the Matapedia Belt are highly mixed both paleoecologically and provincially, containing elements of shallow- and deep-water Midcontinent affinity and elements typical of the Atlantic Faunal Region. Faunas from the Exploits Subzone and Markey Brook are also mixed, suggesting endemic faunas of Atlantic affinity with local influx of Midcontinent faunas from Laurentia. The Goss Point Formation, previously believed to belong to the Mascarene Group (a Silurian cover sequence on the Avalon Zone), also yields mixed faunas. Provincial mixing of all faunas east of the Anticosti Basin suggests that Late Ordovician faunas around Iapetus Ocean may have been more homogeneous than earlier Ordovician faunas. Therefore, the Iapetus Ocean may have been smaller or current patterns may have changed to permit trans-Iapetan migration. A strong global pattern of provincialism for Late Ordovician conodonts is recognized and a new Australasian Province is proposed. Conodonts permit identification of a previously unrecognized Ordovician volcano-sedimentary succession that has economic and tectonic implications for the region.

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