Mineralogy, metal zoning, and genesis of the Cambrian Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulfide (VMS) deposit
The Lemarchant deposit is a Cambrian bimodal felsic Zn-Pb-Cu-Ag-Au volcanogenic massive sulfide (VMS) deposit that is hosted in the Newfoundland Appalachians. The mineralogy consists of barite and normal VMS sulfides (e.g., sphalerite, galena, pyrite, chalcopyrite), as well as minerals common to epi...
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ftmemorialuniv:oai:research.library.mun.ca:8384 2023-10-01T03:57:36+02:00 Mineralogy, metal zoning, and genesis of the Cambrian Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulfide (VMS) deposit Gill, Shannon 2015-02 application/pdf https://research.library.mun.ca/8384/ https://research.library.mun.ca/8384/1/thesis.pdf en eng Memorial University of Newfoundland https://research.library.mun.ca/8384/1/thesis.pdf Gill, Shannon <https://research.library.mun.ca/view/creator_az/Gill=3AShannon=3A=3A.html> (2015) Mineralogy, metal zoning, and genesis of the Cambrian Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulfide (VMS) deposit. Masters thesis, Memorial University of Newfoundland. thesis_license Thesis NonPeerReviewed 2015 ftmemorialuniv 2023-09-03T06:46:51Z The Lemarchant deposit is a Cambrian bimodal felsic Zn-Pb-Cu-Ag-Au volcanogenic massive sulfide (VMS) deposit that is hosted in the Newfoundland Appalachians. The mineralogy consists of barite and normal VMS sulfides (e.g., sphalerite, galena, pyrite, chalcopyrite), as well as minerals common to epithermal deposits (e.g., tetrahedrite, bornite, electrum) and enrichments in epithermal suite elements. Sulfur isotope analyses of sulfides range from δ³⁴S -6.4 to +15.1‰ and indicate sulfur was derived from thermochemically reduced seawater sulfate, igneous leaching and magmatic SO₂ . Lead isotope data are restricted, and indicate Pb-sourcing from Neoproterozoic basement rocks and more juvenile sources. The occurrence of epithermal suite minerals and element enrichments with bladed suggest that precious metals were derived from magmatic fluid additions to the VMS hydrothermal system. Precious metal enrichment of the Lemarchant deposit was caused by low temperature, oxidized, near neutral fluids that boiled upon seafloor discharge in a shallow water (<1500 mbsl) setting. Thesis Newfoundland Memorial University of Newfoundland: Research Repository |
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Memorial University of Newfoundland: Research Repository |
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English |
description |
The Lemarchant deposit is a Cambrian bimodal felsic Zn-Pb-Cu-Ag-Au volcanogenic massive sulfide (VMS) deposit that is hosted in the Newfoundland Appalachians. The mineralogy consists of barite and normal VMS sulfides (e.g., sphalerite, galena, pyrite, chalcopyrite), as well as minerals common to epithermal deposits (e.g., tetrahedrite, bornite, electrum) and enrichments in epithermal suite elements. Sulfur isotope analyses of sulfides range from δ³⁴S -6.4 to +15.1‰ and indicate sulfur was derived from thermochemically reduced seawater sulfate, igneous leaching and magmatic SO₂ . Lead isotope data are restricted, and indicate Pb-sourcing from Neoproterozoic basement rocks and more juvenile sources. The occurrence of epithermal suite minerals and element enrichments with bladed suggest that precious metals were derived from magmatic fluid additions to the VMS hydrothermal system. Precious metal enrichment of the Lemarchant deposit was caused by low temperature, oxidized, near neutral fluids that boiled upon seafloor discharge in a shallow water (<1500 mbsl) setting. |
format |
Thesis |
author |
Gill, Shannon |
spellingShingle |
Gill, Shannon Mineralogy, metal zoning, and genesis of the Cambrian Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulfide (VMS) deposit |
author_facet |
Gill, Shannon |
author_sort |
Gill, Shannon |
title |
Mineralogy, metal zoning, and genesis of the Cambrian Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulfide (VMS) deposit |
title_short |
Mineralogy, metal zoning, and genesis of the Cambrian Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulfide (VMS) deposit |
title_full |
Mineralogy, metal zoning, and genesis of the Cambrian Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulfide (VMS) deposit |
title_fullStr |
Mineralogy, metal zoning, and genesis of the Cambrian Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulfide (VMS) deposit |
title_full_unstemmed |
Mineralogy, metal zoning, and genesis of the Cambrian Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulfide (VMS) deposit |
title_sort |
mineralogy, metal zoning, and genesis of the cambrian zn-pb-cu-ag-au lemarchant volcanogenic massive sulfide (vms) deposit |
publisher |
Memorial University of Newfoundland |
publishDate |
2015 |
url |
https://research.library.mun.ca/8384/ https://research.library.mun.ca/8384/1/thesis.pdf |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_relation |
https://research.library.mun.ca/8384/1/thesis.pdf Gill, Shannon <https://research.library.mun.ca/view/creator_az/Gill=3AShannon=3A=3A.html> (2015) Mineralogy, metal zoning, and genesis of the Cambrian Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulfide (VMS) deposit. Masters thesis, Memorial University of Newfoundland. |
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thesis_license |
_version_ |
1778529367969759232 |