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GAC-MAC-PEG 2024 Brandon Meeting: Abstracts, Volume 47 GAC-MAC-PEG 2024 年布兰登会议:摘要,第 47 卷
IF 1.8 4区 地球科学
Geoscience Canada Pub Date : 2024-07-13 DOI: 10.12789/geocanj.2024.51.211
Paul Alexandre
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引用次数: 0
Geoscience Canada: Some Reflections on our Golden Anniversary 加拿大地球科学组织:金色周年的一些思考
4区 地球科学
Geoscience Canada Pub Date : 2024-04-05 DOI: 10.12789/geocanj.2024.51.206
Andrew Kerr
{"title":"Geoscience Canada: Some Reflections on our Golden Anniversary","authors":"Andrew Kerr","doi":"10.12789/geocanj.2024.51.206","DOIUrl":"https://doi.org/10.12789/geocanj.2024.51.206","url":null,"abstract":"","PeriodicalId":55106,"journal":{"name":"Geoscience Canada","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140738583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Roger Webb Macqueen: 1935–2024 罗杰-韦伯-麦肯:1935-2024
4区 地球科学
Geoscience Canada Pub Date : 2024-04-05 DOI: 10.12789/geocanj.2024.51.209
Robert B. MacNaughton, Godfrey S. Nowlan
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引用次数: 0
Eugène Rodolphe Faribault: Nova Scotia Gold Icon 欧仁-罗多尔夫-法里博:新斯科舍省黄金偶像
4区 地球科学
Geoscience Canada Pub Date : 2024-04-05 DOI: 10.12789/geocanj.2024.51.208
David Mossman
{"title":"Eugène Rodolphe Faribault: Nova Scotia Gold Icon","authors":"David Mossman","doi":"10.12789/geocanj.2024.51.208","DOIUrl":"https://doi.org/10.12789/geocanj.2024.51.208","url":null,"abstract":"Eugène Rodolphe Faribault proved to be a very good choice as a geologist for the Geological Survey of Canada, after his appointment on July 1, 1883. His career spanned fifty years, time mostly committed to mapping the southwestern half of Nova Scotia, concentrated on the slate and quartzite of the Meguma Supergroup in which gold mining was taking place. In his words, he was, “a specialist on geological maps and structural geology of gold mines in Nova Scotia”. Dozens of his meticulously prepared maps of over sixty gold districts have stood the test of time for accuracy. A popular figure in the field, Faribault made frequent trips to operating mines. He early recognized the existence, in some districts, of extensive bodies of low-grade ore. He emphasized too, the similarities between the ‘saddle reef’ deposits mined in the Bendigo fields of Australia and the auriferous veins of the Meguma formations. His ‘pay-zone’ theory held that near-surface mineable ore in Nova Scotia gold mines should continue at depth, provided the same structural conditions persisted. However, for various reasons his theory received a mixed reception.  Back in Ottawa at the GSC offices, Faribault was a highly respected figure among fellow workers and supervisors alike, and across all departments. His quiet charisma and friendly nature, complemented by professional expertise, won him accolades as an ambassador well beyond the workplace. For his excellence in a young developing science, Faribault thoroughly earned the epithet, “The Grand Old Man of Nova Scotian Geology”.","PeriodicalId":55106,"journal":{"name":"Geoscience Canada","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140740808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Paleoproterozoic Rocks of the Belcher Islands, Nunavut: A Review of Their Remarkable Geology and Relevance to Inuit-led Conservation Efforts 努纳武特贝尔彻群岛的古新生代岩石:贝尔彻群岛古生代岩石:回顾其卓越的地质学及其与因纽特人主导的保护工作的相关性
4区 地球科学
Geoscience Canada Pub Date : 2024-04-05 DOI: 10.12789/geocanj.2024.51.207
Brayden McDonald, C. Partin
{"title":"Paleoproterozoic Rocks of the Belcher Islands, Nunavut: A Review of Their Remarkable Geology and Relevance to Inuit-led Conservation Efforts","authors":"Brayden McDonald, C. Partin","doi":"10.12789/geocanj.2024.51.207","DOIUrl":"https://doi.org/10.12789/geocanj.2024.51.207","url":null,"abstract":"The Paleoproterozoic Belcher Group (ca. 2.0 to 1.83 Ga) occurs on the remote Belcher Islands of Hudson Bay in Nunavut, Canada. It includes nearly nine kilometres of well-preserved siliciclastic and carbonate sedimentary rocks, deposited initially in a marginal to shallow marine setting representing one of the first true continental shelf environments on the proto-Canadian Shield. A wide variety of depositional facies exists within the Belcher Group, and it is particularly well known for its spectacular stromatolites in dolostone. In addition to these macroscopic features, two of its formations (Kasegalik and McLeary) contain intact microfossils of Eoentophysalis belcherensis, the oldest known occurrence of cyanobacteria in the geological record. The uppermost part of the Belcher Group contains sedimentary rocks of very different character that represent a younger foreland basin that developed in response to accretionary and collisional processes of the Trans-Hudson orogen. These younger formations (Omarolluk and Loaf) consist of a thick sequence of turbidites, overlain by arkose and other immature clastic sedimentary rocks. A defining characteristic of the Omarolluk Formation is the presence of calcareous concretions. The Omarolluk Formation shares attributes with “omars”, which are glacially transported clasts that occur both locally and further afield throughout parts of Canada and the northern United States and have helped characterize Pleistocene ice-flow trends across the continent.  The Belcher Group also includes two formations dominated by spectacular mafic volcanic rocks. The earlier episode, represented by the Eskimo Formation, reflects eruption of largely subaerial volcanic flows interpreted to represent flood basalt associated with the rifting of Archean basement during the establishment of the continental shelf. A later volcanic episode (the Flaherty Formation) is dominated by submarine pillowed basalt flows and has been assigned to varied tectonic settings, including volcanic arcs related to subduction and oceanic plateaus related to mantle plume activity and renewed rifting along the continental margin. This later volcanism marks the transition from shelf to foreland basin. Mafic sills and related intrusions (Haig intrusions) occur in the middle and lower part of the Belcher Group. Thermal and chemical interactions between mafic magma and calcareous shale generated unusual rocks that are well known in Nunavut as high-quality artisanal carving stone. The Belcher Group also contains Superior-type iron formations that have attracted past exploration interest.   The Belcher Group is a unique geological entity defined by its wide variety of rock types, its superb exposures, and its potential to illustrate many important geological processes in a formative time in Earth’s history. It is also a unique microfossil paleontological resource, and its deposition brackets a crucial and much-debated interval of Precambrian atmospheric and oceani","PeriodicalId":55106,"journal":{"name":"Geoscience Canada","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140738994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Introducing Sedimentology 沉积学介绍
4区 地球科学
Geoscience Canada Pub Date : 2024-04-05 DOI: 10.12789/geocanj.2024.51.210
David G. Lowe
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引用次数: 0
Canadian Geoscience Diplomacy in Collaboration with IUGS, UNESCO IGCP Geoparks, and World Heritage Geosites: Past, Present, and Future 加拿大与国际地质科学联合会、联合国教科文组织国际地质对比计划地质公园和世界遗产地质公园合作开展的地球科学外交活动:过去、现在和未来
4区 地球科学
Geoscience Canada Pub Date : 2023-12-18 DOI: 10.12789/geocanj.2023.50.204
Nikole Bingham-Koslowski, Katherine J.E. Boggs, Özlem Adiyaman Lopes, Daniel Lebel, Stephen Johnston, Guy Narbonne
{"title":"Canadian Geoscience Diplomacy in Collaboration with IUGS, UNESCO IGCP Geoparks, and World Heritage Geosites: Past, Present, and Future","authors":"Nikole Bingham-Koslowski, Katherine J.E. Boggs, Özlem Adiyaman Lopes, Daniel Lebel, Stephen Johnston, Guy Narbonne","doi":"10.12789/geocanj.2023.50.204","DOIUrl":"https://doi.org/10.12789/geocanj.2023.50.204","url":null,"abstract":"To commemorate the 60th anniversary of IUGS and the 50th anniversary of IGCP, the 2022 symposium entitled “IUGS, Geoparks, and IGCP – Retrospection, today and the future” was coordinated at the GAC-MAC-IAH-CNC-CSPG 2022 Conference in Halifax (16–18 May) with the companion Cliffs of Fundy UNESCO Geopark field trip (19–21 May). Canadian leadership within IUGS and IGCP includes J.M. Harrison as the first president of IUGS in 1961, Antony Berger’s work publishing “Episodes”, which is the IUGS’ quarterly international scientific journal, and Canadian leadership on multiple IGCP projects summarized here. Two panel discussions examined the future of geosciences, UNESCO Geoparks and World Geoheritage Sites in Canada. The need for improved communications with politicians, policymakers, and the general public through education and outreach was emphasized in these panel discussions. UNESCO Geoparks (such as the Cliffs of Fundy), UNESCO World Heritage Geosites and significant museum displays represent vehicles for improving communications with the general public about geosciences and potentially inspiring future geoscientists. This report provides a summary of the symposium and explores some of the many themes that it addressed.","PeriodicalId":55106,"journal":{"name":"Geoscience Canada","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138963771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Logan Medallist 8. Trace Elements in Iron Formation as a Window into Biogeochemical Evolution Accompanying the Oxygenation of Earth’s Atmosphere 洛根奖章获得者 8.铁形成过程中的微量元素是了解地球大气富氧过程中生物地球化学演变的窗口
4区 地球科学
Geoscience Canada Pub Date : 2023-12-18 DOI: 10.12789/geocanj.2023.50.201
K. Konhauser, A. Kappler, Stefan V. Lalonde, L. Robbins
{"title":"Logan Medallist 8. Trace Elements in Iron Formation as a Window into Biogeochemical Evolution Accompanying the Oxygenation of Earth’s Atmosphere","authors":"K. Konhauser, A. Kappler, Stefan V. Lalonde, L. Robbins","doi":"10.12789/geocanj.2023.50.201","DOIUrl":"https://doi.org/10.12789/geocanj.2023.50.201","url":null,"abstract":"Iron formations exemplify a type of sedimentary rock found in numerous Archean and Proterozoic supracrustal successions. They serve as a valuable chemical record of Precambrian seawater chemistry and post-depositional iron cycling. These formations accumulated on the seafloor for over two billion years during the early history of our planet, offering a unique opportunity to study environmental changes that occurred during Earth's evolution. Among these changes, one of the most significant events was the shift from an anoxic planet to one where oxygen (O2) became consistently present in both the marine water column and atmosphere. This progression towards global oxygenation was closely linked to the emergence of aerobic microbial metabolisms, which profoundly impacted continental weathering processes, nutrient supply to the oceans, and ultimately, the diversification of the biosphere and complex life forms. In this review, we synthesize two decades of research into the temporal fluctuations of trace element concentrations in iron formations. Our aim is to shed light on the complex mechanisms that contributed to the oxygenation of Earth's surface environments.","PeriodicalId":55106,"journal":{"name":"Geoscience Canada","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139175196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Implications of Ontario’s Historical Oil and Gas Drilling and Abandonment Practices for Abandoning Orphan and Legacy Wells 安大略历史上的油气钻探和废弃做法对废弃孤井和遗留井的影响
4区 地球科学
Geoscience Canada Pub Date : 2023-12-18 DOI: 10.12789/geocanj.2023.50.203
Dru J. Heagle, Robert Sealey
{"title":"The Implications of Ontario’s Historical Oil and Gas Drilling and Abandonment Practices for Abandoning Orphan and Legacy Wells","authors":"Dru J. Heagle, Robert Sealey","doi":"10.12789/geocanj.2023.50.203","DOIUrl":"https://doi.org/10.12789/geocanj.2023.50.203","url":null,"abstract":"Oil and gas exploration in Ontario began in the mid-1800s, leading to the first oil well drilled in 1858 and the first commercial gas well drilled in 1889. These early discoveries kicked off a boom of exploration and development drilling activity, but well records were not mandatory until 1919 after the introduction of the Natural Gas Act R.S.O.1918, c. 12. The Ontario Bureau of Mines estimated 10,000 operating oil wells in the province at the turn of the 20th century, but there are only records for approximately 1,500 wells. By 1970 there were an estimated 50,000 wells drilled in the province though there are only records for 27,000 wells, indicating there may be tens of thousands of unrecorded or lost wells in southwestern Ontario. Wells that are not properly plugged are a conduit for fluid movement, including brine, natural gas, oil, and hydrogen sulphide, to move from the subsurface to the surface. Historical well abandoning regulations required wells to be plugged with inferior materials including wood, clay, and rubble. Cement was not the standard plugging material until 1964. There are orphaned and legacy wells leaking natural gas and sulphur water (groundwater containing dissolved sulphate and hydrogen sulphide) creating a risk to public safety. Orphaned and legacy wells are also a risk for subsurface energy projects including geological storage of carbon dioxide, hydrogen, and compressed air energy, because the wells may provide a pathway for injected fluids to return to the surface. This study reviews well construction, legislation, and abandonment practices in Ontario beginning in 1858 and identifies five factors impacting the plugging and abandonment of orphaned and legacy wells.Further work is required to locate unreported or lost wells and to develop new techniques to permanently plug wells to limit gas leakage, reduce greenhouse gas emissions, and improve public and environmental safety.","PeriodicalId":55106,"journal":{"name":"Geoscience Canada","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138964327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Brandon 2024: GAC–MAC–PEG Joint Annual Meeting Field Trips 布兰登 2024:GAC-MAC-PEG 联席年会实地考察
4区 地球科学
Geoscience Canada Pub Date : 2023-12-18 DOI: 10.12789/geocanj.2023.50.205
Chris Coueslan
{"title":"Brandon 2024: GAC–MAC–PEG Joint Annual Meeting Field Trips","authors":"Chris Coueslan","doi":"10.12789/geocanj.2023.50.205","DOIUrl":"https://doi.org/10.12789/geocanj.2023.50.205","url":null,"abstract":"","PeriodicalId":55106,"journal":{"name":"Geoscience Canada","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139173929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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