EVIDENCE BEARING ON THE ORIGIN OF THE BELLEORAM STOCK, SOUTHERN NEWFOUNDLAND
The Belleoram stock of homogeneous adamellite is a shallow, late-orogenic intrusion emplaced in arkosic conglomerates, granite, intermediate to basic lavas, and clastic sedimentary rocks. The intruded rocks range in age from Cambrian to Late Devonian. Salic dykes and minor faults cutting the stock r...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1967
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e67-021 http://www.nrcresearchpress.com/doi/pdf/10.1139/e67-021 |
id |
crcansciencepubl:10.1139/e67-021 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e67-021 2023-12-17T10:44:55+01:00 EVIDENCE BEARING ON THE ORIGIN OF THE BELLEORAM STOCK, SOUTHERN NEWFOUNDLAND Ermanovics, I. F. Edgar, A. D. Currie, K. L. 1967 http://dx.doi.org/10.1139/e67-021 http://www.nrcresearchpress.com/doi/pdf/10.1139/e67-021 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 4, issue 3, page 413-431 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1967 crcansciencepubl https://doi.org/10.1139/e67-021 2023-11-19T13:38:50Z The Belleoram stock of homogeneous adamellite is a shallow, late-orogenic intrusion emplaced in arkosic conglomerates, granite, intermediate to basic lavas, and clastic sedimentary rocks. The intruded rocks range in age from Cambrian to Late Devonian. Salic dykes and minor faults cutting the stock represent the closing phases of orogenic activity in this area.Structural, petrographie, and chemical data indicate that the stock is of magmatic origin. Differential assimilation of the host conglomerate and shales may have locally modified the composition of the crystallizing magma. Field observations and modal analyses show that arkosic conglomerates near the stock have been altered to rocks of granitic composition. The margin of the stack has been basified near contacts with shale. Xenoliths of shale have been altered to compositions approaching that of their host. Hydrothermal experiments show that under appropriate conditions the magmatic vapour phase could transport soda, potash, alumina, and silica, in amounts sufficient to explain the observed compositional variation.These results suggest that under suitable conditions combined processes of autometasomatism and assimilation may be an important factor in granitization and basification at the margins of shallow intrusions. Article in Journal/Newspaper Newfoundland Canadian Science Publishing (via Crossref) Canadian Journal of Earth Sciences 4 3 413 431 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Ermanovics, I. F. Edgar, A. D. Currie, K. L. EVIDENCE BEARING ON THE ORIGIN OF THE BELLEORAM STOCK, SOUTHERN NEWFOUNDLAND |
topic_facet |
General Earth and Planetary Sciences |
description |
The Belleoram stock of homogeneous adamellite is a shallow, late-orogenic intrusion emplaced in arkosic conglomerates, granite, intermediate to basic lavas, and clastic sedimentary rocks. The intruded rocks range in age from Cambrian to Late Devonian. Salic dykes and minor faults cutting the stock represent the closing phases of orogenic activity in this area.Structural, petrographie, and chemical data indicate that the stock is of magmatic origin. Differential assimilation of the host conglomerate and shales may have locally modified the composition of the crystallizing magma. Field observations and modal analyses show that arkosic conglomerates near the stock have been altered to rocks of granitic composition. The margin of the stack has been basified near contacts with shale. Xenoliths of shale have been altered to compositions approaching that of their host. Hydrothermal experiments show that under appropriate conditions the magmatic vapour phase could transport soda, potash, alumina, and silica, in amounts sufficient to explain the observed compositional variation.These results suggest that under suitable conditions combined processes of autometasomatism and assimilation may be an important factor in granitization and basification at the margins of shallow intrusions. |
format |
Article in Journal/Newspaper |
author |
Ermanovics, I. F. Edgar, A. D. Currie, K. L. |
author_facet |
Ermanovics, I. F. Edgar, A. D. Currie, K. L. |
author_sort |
Ermanovics, I. F. |
title |
EVIDENCE BEARING ON THE ORIGIN OF THE BELLEORAM STOCK, SOUTHERN NEWFOUNDLAND |
title_short |
EVIDENCE BEARING ON THE ORIGIN OF THE BELLEORAM STOCK, SOUTHERN NEWFOUNDLAND |
title_full |
EVIDENCE BEARING ON THE ORIGIN OF THE BELLEORAM STOCK, SOUTHERN NEWFOUNDLAND |
title_fullStr |
EVIDENCE BEARING ON THE ORIGIN OF THE BELLEORAM STOCK, SOUTHERN NEWFOUNDLAND |
title_full_unstemmed |
EVIDENCE BEARING ON THE ORIGIN OF THE BELLEORAM STOCK, SOUTHERN NEWFOUNDLAND |
title_sort |
evidence bearing on the origin of the belleoram stock, southern newfoundland |
publisher |
Canadian Science Publishing |
publishDate |
1967 |
url |
http://dx.doi.org/10.1139/e67-021 http://www.nrcresearchpress.com/doi/pdf/10.1139/e67-021 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Canadian Journal of Earth Sciences volume 4, issue 3, page 413-431 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e67-021 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
4 |
container_issue |
3 |
container_start_page |
413 |
op_container_end_page |
431 |
_version_ |
1785564474102513664 |