dc.contributor.advisor |
Hanley, Jacob James, 1976- |
|
dc.creator |
Meagher, Daniel Joseph |
|
dc.date.accessioned |
2021-02-10T14:21:37Z |
|
dc.date.available |
2021-02-10T14:21:37Z |
|
dc.date.issued |
2020 |
|
dc.identifier.other |
QE364.2 F47 M43 2020 |
|
dc.identifier.uri |
http://library2.smu.ca/xmlui/handle/01/29491 |
|
dc.description |
1 online resource (270 pages) : colour illustrations, colour maps |
|
dc.description |
Includes abstract and appendices. |
|
dc.description |
Includes bibliographical references (pages 223-264). |
|
dc.description.abstract |
Silicate melt inclusions (SMI) from 2697 – 2699 Ma Bousquet rhyolites (Doyon-Bousquet-LaRonde district, Québec) were characterized to elucidate magmatic contributions to VMS deposit tenor in the region.
The key results are as follows: (i) Early rhyolite is of dominantly ocean ridge (tholeiitic) to transitional affinity, whereas later rhyolite has dominantly volcanic arc (calc-alkaline) affinity; (ii) SMI record a wide compositional range compared to host (bulk) rocks, reflecting extensive plagioclase fractionation at depth and inconsistent with TTG classifications previously proposed for the melts; (iii) Ore/accessory metal concentrations in SMI (e.g., Auavg = 33 to 120 ppb) are much higher than crustal abundances, and reflect pre-eruptive Bousquet Formation magma metal tenor; and (iv) melts were saturated in liquid CO2 but undersaturated in H2O at depth.
The study is one of only a few studies of SMI from Archean rocks and the first to present trace element/ore metal data for SMI of this age. |
en_CA |
dc.description.provenance |
Submitted by Greg Hilliard (greg.hilliard@smu.ca) on 2021-02-10T14:21:37Z
No. of bitstreams: 1
Meagher_Daniel_MASTERS_2020.pdf: 18570993 bytes, checksum: 51a49cdc29a7921ad47d194e6d3ed9ae (MD5) |
en |
dc.description.provenance |
Made available in DSpace on 2021-02-10T14:21:37Z (GMT). No. of bitstreams: 1
Meagher_Daniel_MASTERS_2020.pdf: 18570993 bytes, checksum: 51a49cdc29a7921ad47d194e6d3ed9ae (MD5)
Previous issue date: 2020-12-22 |
en |
dc.language.iso |
en |
en_CA |
dc.publisher |
Halifax, N.S. : Saint Mary's University |
|
dc.subject.lcc |
QE364.2.F47 |
|
dc.subject.lcsh |
Igneous rocks -- Inclusions -- Québec (Province) -- Abitibi Region |
|
dc.subject.lcsh |
Rhyolite -- Québec (Province) -- Abitibi Region |
|
dc.subject.lcsh |
Gold ores -- Québec (Province) -- Abitibi Region |
|
dc.subject.lcsh |
Magmatism -- Québec (Province) -- Abitibi Region |
|
dc.title |
A melt inclusion study of rhyolitic volcanics in the Bousquet Formation, Doyon-Bousquet-LaRonde district, Abitibi Subprovince, Québec : insight into Archean magmatic processes |
en_CA |
dc.type |
Text |
en_CA |
thesis.degree.name |
Master of Science in Applied Science |
|
thesis.degree.level |
Masters |
|
thesis.degree.discipline |
Geology |
|
thesis.degree.grantor |
Saint Mary's University (Halifax, N.S.) |
|