Tectonic and Metallogenic Implications of Regional Seismic Profiles in the Timmins Mining Camp

Snyder, David B.; Bleeker, Wouter; Reed, L. E.; Ayer, J. A.; Houlé, M G; Bateman, Roger

doi:10.2113/gsecongeo.103.6.1135

Cited by 34 publications

(21 citation statements)

References 28 publications

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“…Технические характеристики сейсмического эксперимента являются наиболее вероятной причиной этого обстоятельства. Однако дополнительный сейсмический эксперимент, методически ориентированный на изучение верхней части коры, позволил получить сейсмический образ коры (картину сейсмических отражений в коре) со значительно более высоким разрешением [Snyder et al, 2008]: в этом случае рисунок отражений достаточно близко воспроизводит тектонические структуры, наблюдаемые на дневной поверхности (рис. 9-11).…”

Section: верхняя кораunclassified

“…Вместе с тем внимательный анализ сейсмического образа коры свидетельствует о размещении большинства поясов этого типа также в непосредственной пространственной и во многих случаях -структурной связи со сквозькоровыми надвиго-поддвиговыми тектоническими зонами. Известно также, что в пределах сдвиго-надвиговой зоны Поркюпайн-Дестор породы ассоциации Тимискаминг преимущественно сложены в синклинальные складки [Snyder et al, 2008].…”

Section: верхняя кораunclassified

“…Геологическая карта западной части зеленокаменного пояса Абитиби в провинции Сьюпириор (генерализованная версия карты, представленной на рис. 1 в [Snyder et al, 2008]) (по [Mints, 2017b]). Показано положение сейсмических профилей: ST -Юг-Тимминс (SouthTimmins), CC -Кроучест (Crawchest).…”

Section: разрезов коры полученных авторами статьи и канадскими коллеunclassified

“…This is a simplified version of the map shown in Fig. 1 in [Snyder et al, 2008] (after [Mints, 2017b]). 1 -Proterozoic; 2-7 -Neoarchaean: 2 -granitoids (2.75-2.67 Ga), 3 -Timiskaming type belts: rift-related volcano-sedimentary Timiskaming (2.68-2.67 Ga) and Porcupine (~2.69 Ga) complexes; 4-6 -greenstones within granite-greenstone terranes: 4 -Blake River (~2.70 Ga): a -Upper Unit, б -Lower Unit, 5 -Tisdale (2.71-2.70 Ga) and Kidd-Munro (2.72-2.71 Ga), 6 -Stoughton-Roquemaure (~2.72 Ga), Deloro (2.73-2.72 Ga) and Pacaud (2.75-2.74 Ga); 7 -thrust faults: PDZ -a segment of the Porcupine-Destor deformation zone, LCZ -a segment of the Larder Lake-Cadillac deformation zone; 8 -mineral deposits: a -Kirkland Lake type gold deposits, б -Kidd Creek type VMS deposits; 9 -seismic reflection lines: ST -South Timmins, CC -Crawchest; 10-12 -faults and geological units at seismicgeological sections: 10 -granite-greenstone complexes undivided, 11 -faults, mainly thrusts, 12 -structural lines deciphered from the seismic images of the crust.…”

Section: разрезов коры полученных авторами статьи и канадскими коллеmentioning

confidence: 99%

“…(а) -сейсмический образ коры (мигрированный разрез), заимствованный из [Snyder et al, 2008]; (б) -сейсмический образ с отдешифрированными геологическими и тектоническими границами; (в) -интерпретационный геологический разрез, полученный М.В. Минцем; (г) -интерпретационный геологический разрез по [Snyder et al, 2008] (разрез преобразован: вертикальный и горизонтальный масштабы уравнены). Условные обозначения см.…”

Section: разрезов коры полученных авторами статьи и канадскими коллеunclassified

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Deep Crustal Structure and Model of Neorchaean Evolution of the North American Craton

Mints¹,

Afonina²

2018

Geodin. tektonofiz.

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The structure of the Archaean crust of the North America has been studied based on the synthesis of geological and geophysical data, including seismic sections along LITHOPROBE Geotransects, magnetic and gravity anomaly maps, and seismic tomography data. The authors rely on the experience gained in the Russian Program of the deep geological and geophysical studies of the East European Craton. The juvenile Neoarchaean crust, containing the fragments of reworked Meso-and Paleoarchaean rocks, forms an asymmetric round-oval-shaped domain, wherein the geophysical, structural, and metamorphic parameters display a concentric zoning pattern. The Central zone occupies the Hudson Bay basin. The Internal zone (the northeastern and northern Superior Province) is mainly composed of the granulite facies of metaplutonic, metavolcanic and metasedimentary rocks. The External zone encompasses the southern Superior Province together with Hearne and Rae Provinces. This paper presents 3D crustal models of southern Superior Province. The crust development resulted from rifting and a partial disruption of the continental crust, short-term opening of the linear oceans, successive northward subduction and accretion of the ancient continental and juvenile Neoarchaean oceanic and island-arc terranes between ~2.78 and ~2.70 Ga. Subsequent events in the epicontinental environment, including formation of the metasedimentary belts, granulite facies metamorphism and intense ore formation processes, took place within the range from ~2.71 to ~2.63 Ga. The SCLM morphology within the limits of the Archaean North American Craton can be represented as a flattened overturned cone with a vertical axis (down to a depth of ~350 km). The Hudson Bay basin is located right above the lithospheric keel. A number of the main features of the structure and evolution of the Archaean crust of the North American Craton, primarily the ovalconcentric zoning, the important role of high-temperature magmatic and metamorphic processes and mainly intracontinental magmatism and sedimentation, indicates the leading role of the mantle-plume type processes. The Neoarchaean evolution of the North American craton represents the plate-tectonic processes initiated by a superplume. The Neoarchaean North American Craton is one of a series of similar phenomena that occurred ~2.75 Ga ago in a number of continental regions. The most important features, repeated to a certain degree in tectonic units of this type, are: (1) synchronous formation between 2.79 and 2.58 Ga; (2) mainly intracontinental development; (3) the prevalence of oval-shaped synformal tectonic structures of different ranks with some form of concentric zoning; (4) high-temperature magmatism (usually with the participation of enderbite-charnockites and gabbro-anorthosites) and metamorphism of the granulite facies; (5) a frequently repeated combination of high-grade (granulite and hightemperature amphibolites facies) and low-or moderate-grade (greenschist and epidote-amphibolite facies) metamorphic rocks; (6) the lower-c...

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Section: верхняя кораunclassified

Section: разрезов коры полученных авторами статьи и канадскими коллеunclassified

Section: разрезов коры полученных авторами статьи и канадскими коллеmentioning

confidence: 99%

Section: разрезов коры полученных авторами статьи и канадскими коллеunclassified

See 3 more Smart Citations

Deep Crustal Structure and Model of Neorchaean Evolution of the North American Craton

Mints¹,

Afonina²

2018

Geodin. tektonofiz.

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U–Pb vein xenotime geochronology constraints on timing and longevity of orogenic gold mineralization in the Malartic-Val-d’Or Camp, Abitibi Subprovince, Canada

et al. 2022

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On Archean craton growth and stabilisation: Insights from lithospheric resistivity structure of the Superior Province

Hill

Roots

Frieman

et al. 2021

Earth and Planetary Science Letters

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Tectonic and Metallogenic Implications of Regional Seismic Profiles in the Timmins Mining Camp

Cited by 34 publications

References 28 publications

Deep Crustal Structure and Model of Neorchaean Evolution of the North American Craton

Deep Crustal Structure and Model of Neorchaean Evolution of the North American Craton

U–Pb vein xenotime geochronology constraints on timing and longevity of orogenic gold mineralization in the Malartic-Val-d’Or Camp, Abitibi Subprovince, Canada

On Archean craton growth and stabilisation: Insights from lithospheric resistivity structure of the Superior Province

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