Lithostratigraphic and structural reconstruction 1 of the Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulphide (VMS) deposit, Tally Pond group, central Newfoundland, Canada
The Lemarchant volcanogenic massive sulphide (VMS) deposit (1.24Mt grading at 0.58% Cu, 5.38% Zn, 1.19% Pb, 1.01g/t Au, and 59.17g/t Ag) is a bimodal-felsic VMS deposit hosted within the Late Cambrian (∼513509Ma) Tally Pond group of the Exploit Subzone in central Newfoundland, Canada. The deposit is...
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ftunivtasecite:oai:ecite.utas.edu.au:133160 2023-05-15T17:22:17+02:00 Lithostratigraphic and structural reconstruction 1 of the Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulphide (VMS) deposit, Tally Pond group, central Newfoundland, Canada Cloutier, J Piercey, SJ Lode, S Vande Guchte, M Copeland, DA 2017 https://doi.org/10.1016/j.oregeorev.2017.01.010 http://ecite.utas.edu.au/133160 en eng Elsevier Science Bv http://dx.doi.org/10.1016/j.oregeorev.2017.01.010 Cloutier, J and Piercey, SJ and Lode, S and Vande Guchte, M and Copeland, DA, Lithostratigraphic and structural reconstruction 1 of the Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulphide (VMS) deposit, Tally Pond group, central Newfoundland, Canada, Ore Geology Reviews, 84 pp. 154-173. ISSN 0169-1368 (2017) [Refereed Article] http://ecite.utas.edu.au/133160 Earth Sciences Geology Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.1016/j.oregeorev.2017.01.010 2019-12-13T22:30:58Z The Lemarchant volcanogenic massive sulphide (VMS) deposit (1.24Mt grading at 0.58% Cu, 5.38% Zn, 1.19% Pb, 1.01g/t Au, and 59.17g/t Ag) is a bimodal-felsic VMS deposit hosted within the Late Cambrian (∼513509Ma) Tally Pond group of the Exploit Subzone in central Newfoundland, Canada. The deposit is hosted by andesitic volcaniclastic and volcanic rocks with subordinate dacite flows. The mineralisation is hosted by the dacites and is overlain by pillowed and massive basalts. Four structural breaks offset the local stratigraphic sequences including: 1) the LJ syn-volcanic shear zone; 2) the KJ syn-volcanic shear zone; 3) the Lemarchant thrust; and 4) the Bam normal fault. Deformation of the Lemarchant likely occurred during the Penobscot orogeny (486-478Ma). Early deformation is marked with the local deformation of the LJ and KJ syn-volcanic shear zones during NW-SE compression which coincided with the development of the Lemarchant thrust. A late (<465Ma) east trending normal fault, the Bam fault, affected the central portion of the Lemarchant area and down-faulted the southern portion of the study area relative to the northern portion. Immobile element systematics of all the sequences from the Lemarchant deposit are tholeiitic with transitional Zr/Y ratios (1.9-6.6), La n /Sm n ratios <1 (normalised to upper crust), and have primitive mantle extended rare earth elements profiles with slight light rare earth element (LREE)-enriched patterns with flat heavy REE (HREE), and weak to strong negative Nb, Zr, and Ti anomalies. Together, these geochemical features, coupled with an FIIIa signature, and existing mineralogical and Nd-Pb isotope data, are consistent with the rocks at the Lemarchant deposit having formed within a shallow (<1500m) arc or migrating cross-arc seamount chain located within a young peri-continental rifted arc along the margin of Ganderia, within the Iapetus Ocean. The estimated shallow water emplacement of the deposit likely allowed boiling near or at the rock-sea water interface, ultimately resulting in precious metal enrichment of the Lemarchant deposit. It is suggested that cross-arcs within rifted arc environments may represent favourable explor Article in Journal/Newspaper Newfoundland eCite UTAS (University of Tasmania) Canada Ore Geology Reviews 84 154 173 |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Earth Sciences Geology Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) |
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Earth Sciences Geology Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) Cloutier, J Piercey, SJ Lode, S Vande Guchte, M Copeland, DA Lithostratigraphic and structural reconstruction 1 of the Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulphide (VMS) deposit, Tally Pond group, central Newfoundland, Canada |
topic_facet |
Earth Sciences Geology Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) |
description |
The Lemarchant volcanogenic massive sulphide (VMS) deposit (1.24Mt grading at 0.58% Cu, 5.38% Zn, 1.19% Pb, 1.01g/t Au, and 59.17g/t Ag) is a bimodal-felsic VMS deposit hosted within the Late Cambrian (∼513509Ma) Tally Pond group of the Exploit Subzone in central Newfoundland, Canada. The deposit is hosted by andesitic volcaniclastic and volcanic rocks with subordinate dacite flows. The mineralisation is hosted by the dacites and is overlain by pillowed and massive basalts. Four structural breaks offset the local stratigraphic sequences including: 1) the LJ syn-volcanic shear zone; 2) the KJ syn-volcanic shear zone; 3) the Lemarchant thrust; and 4) the Bam normal fault. Deformation of the Lemarchant likely occurred during the Penobscot orogeny (486-478Ma). Early deformation is marked with the local deformation of the LJ and KJ syn-volcanic shear zones during NW-SE compression which coincided with the development of the Lemarchant thrust. A late (<465Ma) east trending normal fault, the Bam fault, affected the central portion of the Lemarchant area and down-faulted the southern portion of the study area relative to the northern portion. Immobile element systematics of all the sequences from the Lemarchant deposit are tholeiitic with transitional Zr/Y ratios (1.9-6.6), La n /Sm n ratios <1 (normalised to upper crust), and have primitive mantle extended rare earth elements profiles with slight light rare earth element (LREE)-enriched patterns with flat heavy REE (HREE), and weak to strong negative Nb, Zr, and Ti anomalies. Together, these geochemical features, coupled with an FIIIa signature, and existing mineralogical and Nd-Pb isotope data, are consistent with the rocks at the Lemarchant deposit having formed within a shallow (<1500m) arc or migrating cross-arc seamount chain located within a young peri-continental rifted arc along the margin of Ganderia, within the Iapetus Ocean. The estimated shallow water emplacement of the deposit likely allowed boiling near or at the rock-sea water interface, ultimately resulting in precious metal enrichment of the Lemarchant deposit. It is suggested that cross-arcs within rifted arc environments may represent favourable explor |
format |
Article in Journal/Newspaper |
author |
Cloutier, J Piercey, SJ Lode, S Vande Guchte, M Copeland, DA |
author_facet |
Cloutier, J Piercey, SJ Lode, S Vande Guchte, M Copeland, DA |
author_sort |
Cloutier, J |
title |
Lithostratigraphic and structural reconstruction 1 of the Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulphide (VMS) deposit, Tally Pond group, central Newfoundland, Canada |
title_short |
Lithostratigraphic and structural reconstruction 1 of the Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulphide (VMS) deposit, Tally Pond group, central Newfoundland, Canada |
title_full |
Lithostratigraphic and structural reconstruction 1 of the Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulphide (VMS) deposit, Tally Pond group, central Newfoundland, Canada |
title_fullStr |
Lithostratigraphic and structural reconstruction 1 of the Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulphide (VMS) deposit, Tally Pond group, central Newfoundland, Canada |
title_full_unstemmed |
Lithostratigraphic and structural reconstruction 1 of the Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulphide (VMS) deposit, Tally Pond group, central Newfoundland, Canada |
title_sort |
lithostratigraphic and structural reconstruction 1 of the zn-pb-cu-ag-au lemarchant volcanogenic massive sulphide (vms) deposit, tally pond group, central newfoundland, canada |
publisher |
Elsevier Science Bv |
publishDate |
2017 |
url |
https://doi.org/10.1016/j.oregeorev.2017.01.010 http://ecite.utas.edu.au/133160 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_relation |
http://dx.doi.org/10.1016/j.oregeorev.2017.01.010 Cloutier, J and Piercey, SJ and Lode, S and Vande Guchte, M and Copeland, DA, Lithostratigraphic and structural reconstruction 1 of the Zn-Pb-Cu-Ag-Au Lemarchant volcanogenic massive sulphide (VMS) deposit, Tally Pond group, central Newfoundland, Canada, Ore Geology Reviews, 84 pp. 154-173. ISSN 0169-1368 (2017) [Refereed Article] http://ecite.utas.edu.au/133160 |
op_doi |
https://doi.org/10.1016/j.oregeorev.2017.01.010 |
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Ore Geology Reviews |
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84 |
container_start_page |
154 |
op_container_end_page |
173 |
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1766108834543173632 |