Early Paleozoic development of the Maine-Quebec boundary Mountains region
Canadian Journal of Earth Sciences
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Abstract
Pre-Silurian bedrock units played key roles in the early Paleozoic history of the Maine-Quebec Appalachians. These units represent peri-Laurentian material whose collision with the craton deformed the Neoproteozoic passive margin and initiated the Appalachian mountain-building cycle. We present new field, petrological, geochronological, and geochemical data to support the following interpretations related to these units. (1) The Boil Mountain Complex and Jim Pond Formation do not represent part of a coherent ophiolite. (2) Gabbro and tonalite of the Boil Mountain Complex intruded the Chain Lakes massif at ca. 477 Ma. (3) The Skinner pluton, an arc-related granodiorite, intruded the Chain Lakes massif at ca. 472 Ma. (4) The Attean pluton, with a reconfirmed age of ca. 443 Ma, is unrelated to Early Ordovician orogenesis. (5) The most likely timing for the juxtaposition of the Jim Pond Formation and the Boil Mountain Complex was during regional Devonian deformation. These interpretations suggest that the Boundary Mountains were once part of a series of arcs extending at least from central New England through Newfoundland. ?? 2006 NRC Canada.
Suggested Citation
Gerbi, C., Johnson, S., Aleinikoff, J.N., Bedard, J., Dunning, G., Fanning, C., 2006, Early Paleozoic development of the Maine-Quebec boundary Mountains region: Canadian Journal of Earth Sciences, v. 43, no. 3, p. 367-389, https://doi.org/10.1139/E05-113.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Early Paleozoic development of the Maine-Quebec boundary Mountains region |
| Series title | Canadian Journal of Earth Sciences |
| DOI | 10.1139/E05-113 |
| Volume | 43 |
| Issue | 3 |
| Year Published | 2006 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Canadian Journal of Earth Sciences |
| First page | 367 |
| Last page | 389 |