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Journal articles on the topic 'Greenstone'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Scherstén, Anders, Henrik Stendal, and Tomas Næraa. "Geochemistry of greenstones in the Tasiusarsuaq terrane, southern West Greenland." Geological Survey of Denmark and Greenland (GEUS) Bulletin 15 (July 10, 2008): 69–72. http://dx.doi.org/10.34194/geusb.v15.5047.

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Tonalite-trondhjemite–granodiorite (TTG) gneisses and mela nocratic to ultramafic greenstones dominate the Arc haean basement of southern West Greenland. The greenstones are likely to represent different original environments, which is important as the mineral deposits they may host depend on this. For example, massive sulphide deposits associated with gold and base metals are commonly volcan og enic, while chrome, nickel and platinum group elements are more commonly associated with layered intrusions (Robb 2005). Cur rent investigations by the Geological Survey of Denmark and Greenland (GEUS)

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Phillips, G. Neil, David I. Groves, and Isobel J. Brown. "Source requirements for the Golden Mile, Kalgoorlie: significance to the metamorphic replacement model for Archean gold deposits." Canadian Journal of Earth Sciences 24, no. 8 (1987): 1643–51. http://dx.doi.org/10.1139/e87-158.

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The Golden Mile at Kalgoorlie represents a giant Archean hydrothermal gold system localized by ductile shear zones and hosted mainly by a differentiated tholeiitic sill. Chlorite, carbonate, and pyrite alteration zones cover the whole mineralized area (1 km × 3 km), and calculations suggest that for the Golden Mile (production around 1200 t Au), the amounts of components added to these alteration zones are 340 Mt CO2, 20 Mt K, and 5 Mt S. If one adopts a metamorphic-replacement model for gold mineralization in which all ore components derive from devolatilization of greenstones at amphibolite

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3

Rakovan, John. "Greenstone." Rocks & Minerals 83, no. 6 (2008): 553–56. http://dx.doi.org/10.3200/rmin.83.6.553-556.

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4

Fushimi, Marcela, Mariana Pichinini, Ana María Sanllorenti Sanllorenti, and Martín Williman. "Greenstone." RDBCI: Revista Digital de Biblioteconomia e Ciência da Informação 16, no. 2 (2018): 306–28. http://dx.doi.org/10.20396/rdbci.v16i2.8655870.

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Este artigo apresenta as características e a história do software para criar e gerenciar bibliotecas digitais Greenstone, desenvolvidas inicialmente pela Universidade de Waikato, Nova Zelândia, em 1997. Primeiro, a comunidade de usuários é descrita a nível global, com foco no uso atual que o software conseguiu na Argentina: o número de implementações disponíveis, sua evolução, o tipo, tamanho e variedade dos desenvolvimentos existentes, bem como a sua aplicação à gestão de repositórios digitais de ciência e tecnologia no campo das instituições científicas, tecnológicas e de ensino superior na

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5

Hofmann, A., H. Xie, L. Saha, and C. Reinke. "Granitoids and greenstones of the White Mfolozi Inlier, south-east Kaapvaal Craton." South African Journal of Geology 123, no. 3 (2020): 263–76. http://dx.doi.org/10.25131/sajg.123.0019.

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Abstract A Palaeoarchaean greenstone fragment and associated granitoid gneisses from an area south of Ulundi in KwaZulu-Natal is described. The fragment consists of an association of garnetiferous amphibolite and calc-silicate that was intruded at 3388 ± 4 Ma by tonalite and at 3275 ± 4 Ma by trondhjemite. Strong ductile deformation of the greenstones and granitoids under amphibolite facies conditions (7 kbar and 600 to 650°C) took place prior to uplift and emplacement of a granite batholith at ~3.25 Ga ago in which the granitoid gneiss-greenstone domain is now found. Magmatism 3.27 to 3.25 Ga

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Anhaeusser, C. R. "The geology and tectonic evolution of the northwest part of the Barberton Greenstone Belt, South Africa: A review." South African Journal of Geology 122, no. 4 (2019): 421–54. http://dx.doi.org/10.25131/sajg.122.0033.

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AbstractFormations on the northwestern flank of the Barberton Greenstone Belt have hosted over 85% of all the gold recovered from the ca. 3550 to 3000 Ma Barberton Supergroup since early discoveries in 1872. This sector of the greenstone belt also happens to coincide with a complex tectonic architecture resulting from successive stages of folding and faulting superimposed onto a complex lithostratigraphy. Of particular importance has been the influence of two diapiric granitoid intrusions that caused added structural complexity following their emplacement ca. 3227 to 3250 Ma. Of these the larg

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Thurston, Phillips C. "Igneous Rock Associations 19. Greenstone Belts and Granite−Greenstone Terranes: Constraints on the Nature of the Archean World." Geoscience Canada 42, no. 4 (2015): 437. http://dx.doi.org/10.12789/geocanj.2015.42.081.

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Greenstone belts are long, curvilinear accumulations of mainly volcanic rocks within Archean granite−greenstone terranes, and are subdivided into two geochemical types: komatiite−tholeiite sequences and bimodal sequences. In rare instances where basement is preserved, the basement is unconformably overlain by platform to rift sequences consisting of quartzite, carbonate, komatiite and/or tholeiite. The komatiite−tholeiite sequences consist of km-scale thicknesses of tholeiites, minor intercalated komatiites, and smaller volumes of felsic volcanic rocks. The bimodal sequences consist of basal t

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Abbott, D. "Greenstone belts." Eos, Transactions American Geophysical Union 79, no. 10 (1998): 123. http://dx.doi.org/10.1029/98eo00089.

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9

Falkenström, Per. "Greenstone Dimensions." Lithic Technology 36, no. 2 (2011): 141–52. http://dx.doi.org/10.1179/lit.2011.36.2.141.

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10

St. Seymour, Karen, Andrew Turek, Ronald Doig, Stephen Kumarapeli, and Robert Fogal. "First U–Pb zircon ages of granitoid plutons from the La Grande greenstone belt, James Bay area, New Quebec." Canadian Journal of Earth Sciences 26, no. 5 (1989): 1068–73. http://dx.doi.org/10.1139/e89-088.

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Zircon ages from three granitoid plutons are the first to be reported from the La Grande greenstone belt. Two of the dated samples are from highly tectonized, early tectonic plutons that at the present level of erosion are just outside the greenstone belt proper. Their zircon ages of ca. 2740 Ma are emplacement ages or alternatively represent the age of maximum deformation of the greenstone belt. The third sample is from a mildly deformed late tectonic pluton within the greenstone belt. Its zircon age of ca. 2670 Ma probably represents the emplacement age. The above dates and the relationships

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Satizabal Pazos, Daniel Mauricio, and Bogdan Nitescu. "Analysis and Interpretation of Regional Gravity Data in the Swayze greenstone belt of the Superior Province, Canada." Geofísica Internacional 62, no. 4 (2023): 607–16. http://dx.doi.org/10.22201/igeof.2954436xe.2023.62.4.1438.

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The Swayze greenstone belt (SGB) is an Archean granitoid-greenstone terrain located in the central part of the Superior Province in Canada. The main objective of this project consisted in doing an analysis and modelling of public regional gravity data of the Swayze greenstone belt with the aim of examining the geometry and depth extent of the geological bodies that occur in the area of this greenstone belt. Gravity data from the Geophysical Data Repository of Natural Resources Canada was used to obtain forward 2.75D gravity models along three profiles, two transversal and one longitudinal to t

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Diener, J. F. A., and A. Dziggel. "Can mineral equilibrium modelling provide additional details on metamorphism of the Barberton garnet amphibolites?" South African Journal of Geology 124, no. 1 (2021): 211–24. http://dx.doi.org/10.25131/sajg.124.0003.

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Abstract The Stolzburg domain to the south of the Barberton Greenstone Belt preserves evidence for a 3.23 Ga subduction–collision tectonic event. Garnet amphibolite greenstone remnants have previously yielded conventional thermobarometric P-T estimates of 12 to 15 kbar at 600 to 650°C, 8 to 11 kbar at 650 to 700°C and 7.5 to 8.5 kbar at 560 to 640°C from, respectively, the Inyoni shear zone along the western margin of the Stolzburg domain, the central part of the domain and from the Tjakastad schist belt on the boundary with the main body of the Barberton Greenstone Belt. Pseudosection calcula

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Silberman, Bernard S. "J. David Greenstone." PS: Political Science & Politics 23, no. 03 (1990): 476–77. http://dx.doi.org/10.1017/s1049096500033400.

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14

Kozlov, N. E., N. O. Sorokhtin, N. E. Kozlova, and Eu V. Martynov. "Geological structure of the Ustoyarvi region (North-Western part of the Russian Arctic)." Vestnik MGTU 25, no. 1 (2022): 12–26. http://dx.doi.org/10.21443/1560-9278-2022-25-1-12-26.

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The paper presents data on geology and composition of rocks from the Ustoyarvi region (the North-Western Arctic zone of Russian Federation). Their compositional analysis (including mathematical evaluation of the similarity/difference measure) provided much reliable conclusion that the rocks from this area, which are presumably attributed to the Ustoyarvi structure (Ustoyarvinsky Greenstone Belt) were similar to those from the Ura-Guba area in the Kolmozero-Voronya Belt and continued it. In addition, it has been shown that from west to east lithotectonic units in the adjacent (Suormussky) Block

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15

Jaime-Riverón, Olaf. "OLMEC GREENSTONE IN EARLY FORMATIVE MESOAMERICA: EXCHANGE AND PROCESS OF PRODUCTION." Ancient Mesoamerica 21, no. 1 (2010): 123–33. http://dx.doi.org/10.1017/s095653611000009x.

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AbstractThe earliest uses of Olmec greenstone (jadeite, greenstone, schist, green quartz, and others) accelerated the interregional exchange of technology and raw materials. These relationships provoked asymmetry between polities of different parts of Mesoamerica and within Olmec sites. There were stronger relationships between the Gulf Coast and Chiapas. In general terms, greenstone artifacts display an evolutionary process similar to ceramics and basalt sculpture in the emergence of complex society during terminal Early Formative times. This paper focuses on the exchange of technological cho

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16

Almahameed, M. A., A. A. A. Sirhan, S. A. A. Tawalbeh, A. A. Almohtaseb, and O. A. A. Rawashdeh. "A PROPOSAL FOR BUILDING AN INTEGRATED DIGITAL LIBRARY OF MATERIALS RELATED TO PETRA CITY USING THE GREENSTONE SYSTEM: USERS' PERSPECTIVES." Library Mercury, no. 1(27) (June 30, 2022): 79–104. http://dx.doi.org/10.18524/2707-3335.2022.1(27).256412.

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The study aims to examine the possibility of employng the Greenstone system to create a digital tourism library for the city of Petra. In this context, the study has derived three objectives such as; briefly explaining the stages of building a digital library using the Greenstone system, investigating students’ opinions about the characteristics of the Greenstone system, investigating students’ opinions about the materials and information that should be included in the digital library. The study adopted a survey-based methodology involving 50 students from Al Hussein Bin Talal University. The

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17

Jirsa, Mark A. "The Midway sequence: a Timiskaming-type, pull-apart basin deposit in the western Wawa subprovince, Minnesota." Canadian Journal of Earth Sciences 37, no. 1 (2000): 1–15. http://dx.doi.org/10.1139/e99-111.

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The Midway sequence is an assemblage of subaerially deposited clastic and volcanic rocks that forms a narrow wedge within Neoarchean greenstone of the western Wawa subprovince of the Superior Province. Volcanic conglomerate in the Midway sequence contains clasts of stratigraphically older greenstone, together with clasts of a distinctive hornblende-phyric trachyandesite that is not represented among the older greenstone flows. The trachyandesite forms flows and pyroclastic units that are interbedded with lenticular deposits of volcanic conglomerate in a manner interpreted to indicate approxima

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18

Pamungkas, Faisal Dinar, and Agus Purnomo Sidi. "The Influence of Leadership Style and Discipline on Employee Performance at PT. Notojoyo Nusantara Malang." International Journal of Science, Technology & Management 3, no. 1 (2022): 50–55. http://dx.doi.org/10.46729/ijstm.v3i1.423.

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This study aims to determine how the influence of leadership style and discipline on employee performance at PT. Notojoyo Nusantara in a case study of the construction of the Greenstone City Malang housing area. This study used a research instrument, namely a questionnaire to obtain primary data. The population in this study were all employees of Greenstone City with the determination of the sample using the saturated sample technique with the stratified random sampling method. Respondents in this study were 44 employees. Analysis of the data in this study using multiple linear regression anal

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19

Vrevskii, A. B. "Non-subduction petrological mechanisms for the growth of the neoarcheam continental crust of the Kola–Norwegian terrane, Fennoscandian shield: geological and isotope-geochemical evidence." Петрология 27, no. 2 (2019): 161–86. http://dx.doi.org/10.31857/s0869-59032161-186.

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The paper reports new data on the composition and age of the Neoarchean calc-alkaline volcanic rocks of the Uraguba–Kolmozero–Voron’ya greenstone belt (UKV GB). Petrological-geochemical modeling indicates a polygenetic origin of primary melts of the basalt–andesite–dacite association and non-subduction geodynamic mechanisms for the crustal growth in the largest greenstone belt of the Kola–Norwegian Block of the Fennoscandian shield.

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20

Kusky, Timothy M., and Pamela A. Winsky. "Structural relationships along a greenstone/shallow water shelf contact, Belingwe greenstone belt, Zimbabwe." Tectonics 14, no. 2 (1995): 448–71. http://dx.doi.org/10.1029/94tc03086.

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21

Aadhiseshan, K. R., and M. Jayananda. "Archean crustal evolution and building of habitable continents: Insights from the Western Dharwar Craton." Habitable Planet 1, no. 1&2 (2025): 197–220. https://doi.org/10.63335/j.hp.2025.0016.

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This contribution presents a comprehensive review synthesis addressing the time frame and processes involved in formation of Archean continental crust, surface environments, oxygenation and microbial activity leading to building the habitable continent in the western Dharwar craton (WDC). The WDC preserve ca. 3600-2600 Ma crustal record comprising TTGs, volcanic-sedimentary greenstones and potassic granites. U-Pb zircon ages and Sm-Nd whole rock isochrons suggest successive stages TTG accretion and greenstone volcanism contribute to episodic continental growth during ca. 3450-3350 Ma, 3300-320

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22

Petchey, Peter. "Evidence of the Working of Greenstone by Taranaki Maori Prisoners in the Dunedin Gaol." Journal of Pacific Archaeology 6, no. 1 (2015): 70–79. http://dx.doi.org/10.70460/jpa.v6i1.163.

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During 2001 archaeological investigations were carried out at the Dunedin Law Courts during a restoration and redevelopment project of the historic building complex. The Courts were built in 1900 on the site of the former Dunedin Gaol, where a number of Maori prisoners from Taranaki had been held in 1869-1873 and 1879-1881. In 1891 Judge F.R. Chapman published an account that related how some of these prisoners had worked greenstone in the gaol to make artefacts for sale, and the 2001 archaeological excavation found a small tab of sawn greenstone in one corner of the old exercise yard. The rol

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23

Lodge, Robert W. D., Harold L. Gibson, Greg M. Stott, James M. Franklin, and George J. Hudak. "Geodynamic setting, crustal architecture, and VMS metallogeny of ca. 2720 Ma greenstone belt assemblages of the northern Wawa subprovince, Superior Province." Canadian Journal of Earth Sciences 52, no. 3 (2015): 196–214. http://dx.doi.org/10.1139/cjes-2014-0163.

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The greenstone belts along the northern margin of the Wawa subprovince of the Superior Province (Vermilion, Shebandowan, Winston Lake, Manitouwadge) formed at ca. 2720 Ma and have been interpreted to be representative of a rifted-arc to back-arc tectonic setting. Despite a common inferred tectonic setting and broad similarities, these greenstone belts have a significantly different metallogeny as evidenced by different endowments in volcanogenic massive sulphide (VMS), magmatic sulphide, and orogenic gold deposits. In this paper, we examine differences in geodynamic setting and crustal archite

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Pan, Yuanming, and Michael E. Fleet. "Polymetamorphism in the Archean Hemlo – Heron Bay greenstone belt, Superior Province: P–T variations and implications for tectonic evolution." Canadian Journal of Earth Sciences 30, no. 5 (1993): 985–96. http://dx.doi.org/10.1139/e93-082.

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The tectono-metamorphic history of the late Archean (2800–2600 Ma) Hemlo – Heron Bay greenstone belt in the Superior Province has been delineated from textural relationships, mineral chemistry, and P–T paths in metapelites, cordierite–orthoamphibole rocks, and metabasites from the White River exploration property, Hemlo area, Ontario. An early low-temperature, medium-pressure metamorphism (about 500 °C and 6–6.5 kbar (1 kbar = 100 MPa)) is indicated by the occurrence of relict kyanite and staurolite porphyroblasts and zoned garnet porphyroblasts in metapelites and the presence of zoned calcic

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Hofmann, A., C. R. Anhaeusser, and X.-H. Li. "Layered ultramafic complexes of the Barberton Greenstone Belt – age constraints and tectonic implications." South African Journal of Geology 124, no. 1 (2021): 7–16. http://dx.doi.org/10.25131/sajg.124.0002.

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Abstract Layered ultramafic–mafic complexes are a common component of the stratigraphically uppermost part of the Onverwacht Group of the Barberton Greenstone Belt. Associated with the Mendon Formation in the south and the Weltevreden Formation in the north, they represent an assemblage of thick differentiated flows and shallow synvolcanic intrusions ranging in composition from dunite to gabbro. U-Pb zircon dating of gabbro from the Sawmill and the Mundt’s Concession ultramafic complexes from the northern part of the Barberton Greenstone Belt yielded ages of 3 258 ± 8 Ma and 3 244 ± 11 Ma, res

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Bose, Mihir K., and Manas K. Chakraborti. "Geochemical Changes in Basalts Across Rhe Archaean-Proterozoic Boundary-An Evaluation of Dalma Basalts from Eastern Indian Shield." Journal Geological Society of India 43, no. 3 (1994): 281–93. http://dx.doi.org/10.17491/jgsi/1994/430306.

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Abstract Geochemical characteristics of Dalma basalts from the Proterozoic Singhbhum basin of eastern Indian shield have been evaluated in the perspective of basalt geochemistry across the Archaean-Proterozoic Boundary (APB) in greenstone belt association. Most of the incompatible elements and element ratios in Dalma basalts clearly establish their depleted geochemical signature comparable to the late Archaean greenstone belt basalts. Like their late Archaean counterparts, the Dalma basalts have La/Yb = 2.50, La/Ta = 19, Ti/V = 18 and Zr/Y = 2.6. This ultrabasic and potash-poor tholeiitic asso

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27

Hollis, Julie A., Jeroen A. M. Van Gool, Agnete Steenfelt, and Adam A. Garde. "Greenstone belts in the central Godthåbsfjord region, southern West Greenland." Geological Survey of Denmark and Greenland (GEUS) Bulletin 7 (July 29, 2005): 65–68. http://dx.doi.org/10.34194/geusb.v7.4843.

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In 2004 the Geological Survey of Denmark and Greenland (GEUS) initiated a study of the origin and tectono-metamorphic evolution of greenstone belts and important regional structures in the central Godthåbsfjord region, southern West Greenland (Fig. 1; Hollis et al. 2004). Like other Archaean belts worldwide, these greenstone belts are locally host to gold mineralisation. Their complexity requires a combination of detailed geological mapping, geochemistry, petrographic work and geochronological studies to develop models of their geological setting, evolution and gold mineralisation.

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Baofeng, Shen, Peng Xiaoliang, Luo Hui, and Mao Debao. "Archaean Greenstone Belts in China." Acta Geologica Sinica - English Edition 7, no. 1 (2009): 15–29. http://dx.doi.org/10.1111/j.1755-6724.1994.mp7001002.x.

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Shackleton, R. M. "Tectonic evolution of greenstone belts." Geological Society, London, Special Publications 95, no. 1 (1995): 53–65. http://dx.doi.org/10.1144/gsl.sp.1995.095.01.04.

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30

Witten, Ian H., David Bainbridge, and Stefan Boddie. "Greenstone: Open-source DL software." Communications of the ACM 44, no. 5 (2001): 47. http://dx.doi.org/10.1145/374308.374338.

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31

Fushimi, Marcela, Mariana Pichinini, Ana María Sanllorenti, and Martín Williman. "Greenstone: uso actual en Argentina." RDBCI: Revista Digital de Biblioteconomia e Ciência da Informação 16, no. 2 (2018): 306–28. http://dx.doi.org/10.20396/rdbci.v16i2.8651806.

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Este artigo apresenta as características e a história do software para criar e gerenciar bibliotecas digitais Greenstone, desenvolvidas inicialmente pela Universidade de Waikato, Nova Zelândia, em 1997. Primeiro, a comunidade de usuários é descrita a nível global, com foco no uso atual que o software conseguiu na Argentina: o número de implementações disponíveis, sua evolução, o tipo, tamanho e variedade dos desenvolvimentos existentes, bem como a sua aplicação à gestão de repositórios digitais de ciência e tecnologia no campo das instituições científicas, tecnológicas e de ensino superior na

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32

Kioe-A-Sen, Nicole M. E., Manfred J. van Bergen, Theo E. Wong, and Salomon B. Kroonenberg. "Gold deposits of Suriname: geological context, production and economic significance." Netherlands Journal of Geosciences - Geologie en Mijnbouw 95, no. 4 (2016): 429–45. http://dx.doi.org/10.1017/njg.2016.40.

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AbstractGold has been a major economic asset for Suriname for more than a century. The long history of gold mining, concentrated in large parts of a greenstone belt in the northeast of the country, began with small-scale artisanal extraction activities and has recently seen the development of major open-pit operations. Despite the range of mining activities, Suriname's gold deposits and occurrences are under-explored from a scientific point of view. Primary gold mineralisations in the greenstone belt occur in multiple forms, and although their origin is commonly related to the Palaeoproterozoi

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Schwerdtner, W. M. "Preliminary estimates of the amount of continuous horizontal shortening across an Archean greenstone belt." Canadian Journal of Earth Sciences 22, no. 4 (1985): 506–13. http://dx.doi.org/10.1139/e85-052.

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Simple two-dimensional techniques are used to make an estimate of the total shortening across a narrow greenstone belt in northwestern Ontario. The techniques are based on the basic principle of restoring the predeformational geometry of a horizontal traverse across the belt. Depending on the technique used this traverse is a string of line elements or a chain of finite elements. The strain ratios available for the restoration are minimal values and need to be increased significantly to obtain realistic results. Depending on the strain values selected for the restoration, amounts of horizontal

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34

Parichi, Ramesh, and Faizul Nisha. "Greenstone Digital Library Management System – a functional review based on selected criteria." Library Hi Tech News 32, no. 10 (2015): 16–21. http://dx.doi.org/10.1108/lhtn-06-2015-0041.

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Purpose – This paper aims to provide a functional review of Greenstone based on selected criteria, viz., user friendliness, administration, customization, international metadata standards and interoperability, search and browse capabilities, security aspects, statistical reports, unique features and limitations. Design/methodology/approach – The paper is solely based on secondary information collected from different sources like books, articles from national and international journal articles, reports of various organizations and local newspapers as well as the resources available in various w

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Altman, Micah. "Open Source Software for Libraries: from Greenstone to the Virtual Data Center and Beyond." IASSIST Quarterly 25, no. 4 (2002): 5. http://dx.doi.org/10.29173/iq856.

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36

Bethune, K. M., and R. J. Scammell. "Geology, geochronology, and geochemistry of Archean rocks in the Eqe Bay area, north-central Baffin Island, Canada: constraints on the depositional and tectonic history of the Mary River Group of northeastern Rae Province." Canadian Journal of Earth Sciences 40, no. 8 (2003): 1137–67. http://dx.doi.org/10.1139/e03-028.

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Results of stratigraphic, UPb geochronological, and geochemical study are reported for rocks in a 2800 km2 area along the southeastern margin of the Archean Rae Province on north-central Baffin Island. Archean rocks include a gneiss complex, two greenstone belts of the Mary River Group, and various younger plutonic rocks. The 30002800 Ma gneiss complex contains intrusions of orthogneiss, dated at 27802770 Ma. Intermediate-felsic volcanism in overlying greenstone belts occurred at 27402725 Ma and was accompanied and outlasted by calc-alkaline plutonism (27302715 Ma). Peraluminous plutonism

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Beakhouse, Gary P., Shoufa Lin, and Sandra L. Kamo. "Magmatic and tectonic emplacement of the Pukaskwa batholith, Superior Province, Ontario, CanadaThis article is one of a series of papers published in this Special Issue on the theme of Geochronology in honour of Tom Krogh." Canadian Journal of Earth Sciences 48, no. 2 (2011): 187–204. http://dx.doi.org/10.1139/e10-048.

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The Neoarchean Pukaskwa batholith consists of pre-, syn-, and post-tectonic phases emplaced over an interval of 50 million years. Pre-tectonic phases are broadly synvolcanic and have a high-Al tonalite–trondhjemite–granodiorite (TTG) affinity interpreted to reflect derivation by partial melting of basaltic crust at lower crustal or upper mantle depths. Minor syn-tectonic phases slightly post-date volcanism and have geochemical characteristics suggesting some involvement or interaction with an ultramafic (mantle) source component. Magmatic emplacement of pre- and syn-tectonic phases occurred in

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38

Abraham, A. P. G., D. W. Davis, S. L. Kamo, and E. T. C. Spooner. "Geochronological constraints on late Archean magmatism deformation and gold–quartz vein mineralization in the northwestern Anialik River greenstone belt and igneous complex, Slave Province, N.W.T." Canadian Journal of Earth Sciences 31, no. 8 (1994): 1365–83. http://dx.doi.org/10.1139/e94-119.

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Three phases of the Anialik River igneous complex (ARIC) give U–Pb zircon ages in the range −2705–2683 Ma, and three units from the adjacent northwestern Anialik River greenstone belt (ARGB) give ca. 2678 Ma ages. Titanite from unsheared ARIC rocks crystallized during localized metamorphism and deuteric alteration between 2693 and 2683 Ma. Hydrothermal titanite in wall rocks to gold-mineralized shear zones crystallized during early shear zone development (2670 ± 1 Ma) and was subsequently locally altered to rutile, with gold occurring within the rutile-bearing assemblage. Unaltered second-gene

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Fedo, Christopher M., Kenneth A. Eriksson, and Tom G. Blenkinsop. "Geologic history of the Archean Buhwa Greenstone Belt and surrounding granite–gneiss terrane, Zimbabwe, with implications for the evolution of the Limpopo Belt." Canadian Journal of Earth Sciences 32, no. 11 (1995): 1977–90. http://dx.doi.org/10.1139/e95-151.

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The Buhwa Greenstone Belt (BGB) of southern Zimbabwe is the only major greenstone belt in the Archean Zimbabwe Craton directly adjacent to the granulite-facies rocks that constitute the Northern Marginal Zone of the Limpopo Belt. The deformational history and assembly of the BGB shed light on the evolution of the Northern Marginal Zone – Zimbabwe Craton transition. Assembly of the region began with deposition of the dominantly sedimentary cover succession at ~3.0 Ga on banded gneisses of the ~3.5 Ga Tokwe segment. At ~2.9 Ga the northern margin of the greenstone belt experienced kilometres of

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Van Kranendonk, Martin J. "Cool greenstone drips and the role of partial convective overturn in Barberton greenstone belt evolution." Journal of African Earth Sciences 60, no. 5 (2011): 346–52. http://dx.doi.org/10.1016/j.jafrearsci.2011.03.012.

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Lorin Fassbender, Marc, Mark Hannington, Alan Thomas Baxter, David Diekrup, Margaret Stewart, and Philipp Alexander Brandl. "Geochemical Signatures of Mafic Volcanic Rocks in Modern Oceanic Settings and Implications for Archean Mafic Magmatism." Economic Geology 119, no. 2 (2024): 445–70. http://dx.doi.org/10.5382/econgeo.5044.

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Abstract Greenstone belts are dominated by mafic volcanic rocks with geochemical characteristics that indicate a range of possible geodynamic influences. Many analogies with modern tectonic settings have been suggested. Increasing exploration of the modern oceans and comprehensive sampling of volcanic rocks from the sea floor are now providing unique opportunities to characterize different melt sources and petrogenesis that can be more closely compared to greenstone belts. In this study, we have compiled high-quality geochemical analyses of more than 2,850 unique samples of submarine mafic vol

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Spray, John G., and Lyle A. Burgess. "Landsat MSS imagery applied to geological investigation of the Norseman area granitoid–greenstone terrain, southeast Yilgarn Block, Western Australia." Geological Magazine 122, no. 6 (1985): 587–94. http://dx.doi.org/10.1017/s0016756800032003.

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AbstractInteractively processed Landsat MSS imagery has been used as an aid to studying the regional geology of approximately 10 800 km2 of terrain at the southeast margin of the Archaean Yilgarn Block in Western Australia. The technique proved successful in extending positions of known lithological contacts and lineaments into poorly exposed, inaccessible areas and in revealing new geological features, especially faults, previously unrecognized at ground level. During this investigation the distribution of granitoids and greenstones was more precisely defined, internal greenstone structures h

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Staudigel, Hubert, Harald Furnes, and Maarten DeWit. "Paleoarchean trace fossils in altered volcanic glass." Proceedings of the National Academy of Sciences 112, no. 22 (2015): 6892–97. http://dx.doi.org/10.1073/pnas.1421052112.

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Microbial corrosion textures in volcanic glass from Cenozoic seafloor basalts and the corresponding titanite replacement microtextures in metamorphosed Paleoarchean pillow lavas have been interpreted as evidence for a deep biosphere dating back in time through the earliest periods of preserved life on earth. This interpretation has been recently challenged for Paleoarchean titanite replacement textures based on textural and geochronological data from pillow lavas in the Hooggenoeg Complex of the Barberton Greenstone Belt in South Africa. We use this controversy to explore the strengths and wea

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Pouclet, André, Siaka Doumbia, and Max Vidal. "Geodynamic setting of the Birimian volcanism in central Ivory Coast (western Africa) and its place in the Palaeoproterozoic evolution of the Man Shield." Bulletin de la Société Géologique de France 177, no. 2 (2006): 105–21. http://dx.doi.org/10.2113/gssgfbull.177.2.105.

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Abstract Palaeoproterozoic volcanic formations having different geochemical features are described in the Katiola-Marabadiassa area (Central Ivory Coast). They consist of (i) metamorphic mafic rocks belonging to the greenstone belts, (ii) rhyodacites intruded into the greenstone belts and interpreted as sub-volcanic apophyses of TTG plutons, and (iii) calc-alkaline andesitic lava interbedded in the lower sedimentary pile of the Bandama Basin. The greenstone belt rocks have a magmatic signature of ocean floor tholeiites. They were generated from moderate partial melting of a fairly depleted spi

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Zhiltsova, I. V., M. V. Ruzina, M. L. Malova, N. V. Bilan, O. A. Tereshkova, and A. S. Gardysh. "Analysis of the spatial patterns in localization of gold mineralization relative to the system of deep faults in the Chortomlyk greenstone structure of the Ukrainian shield." Journal of Geology, Geography and Geoecology 27, no. 3 (2019): 537–45. http://dx.doi.org/10.15421/111878.

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The results of analysisof the patterns of the spatial relationship between hydrothermal gold ore formations and the zones of metasomatites and systems of deep faults within the Chortomlyk greenstone structure of the Middle Pridniprovie megablock in the Ukrainian Shield are given. As a result of studying the localization conditions of gold mineralization, it was established that the gold-bearing mineralization is confined to tectonically fractured zones and is localized among metasomatically altered rocks. The hydrothermal series of metasomatites in the Chortomlyk greenstone structure is repres

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Corfu, Fernando, and Shoufa Lin. "Geology and U-Pb geochronology of the Island Lake greenstone belt, northwestern Superior Province, Manitoba." Canadian Journal of Earth Sciences 37, no. 9 (2000): 1275–86. http://dx.doi.org/10.1139/e00-043.

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Mapping and U-Pb geochronology have been used to examine the tectonic and depositional history of the Archean Island Lake greenstone belt in the northwestern Superior Province. The Island Lake greenstone belt comprises two main supracrustal successions, the older Hayes River Group and the younger Island Lake Group. Zircon data for two volcanic units from the Hayes River Group provide identical ages of 2852 ± 1.5 Ma, whereas a turbidite of this group contains a detrital zircon population with ages between 2858 and 2847 Ma. Younger intrusive events include the emplacement of tonalite in the sout

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Corkery, M. T., D. W. Davis, and P. G. Lenton. "Geochronological constraints on the development of the Cross Lake greenstone belt, northwest Superior Province, Manitoba." Canadian Journal of Earth Sciences 29, no. 10 (1992): 2171–85. http://dx.doi.org/10.1139/e92-172.

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Recent 1: 20 000 mapping combined with 11 age determinations from metavolcanic, metaplutonic, and metasedimentary rocks in the Cross Lake greenstone belt provide a framework for interpreting the stratigraphic, structural, intrusive, and metamorphic evolution of the belt. These data, in combination with U–Pb ages from adjacent granitoid domains, are used to model a cratonizing event in the northwest Superior Province.The Cross Lake greenstone belt is made up of three distinct unconformable groups of supracrustal rocks: (i) the Pipestone Lake Group (2760 Ma), a thick sequence of pillowed and mas

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Inza, Coulibaly, Kouamelan Alain Nicaise, Djro Sagbrou Chérubin, and Coulibaly Yacouba. "Petrographie Des Volcanites Et Plutonites De La Partie Sud Du Sillon Volcano-Sedimentaire De Toumodi-Fetekro (Cote D’ivoire)." European Scientific Journal, ESJ 13, no. 30 (2017): 199. http://dx.doi.org/10.19044/esj.2017.v13n30p199.

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The southern part of Toumodi-Fètêkro greenstone belt is located in the Center - Southeast of Ivory Coast. Petrographic study of volcanic and plutonic rocks shows three units. The first unit is composed of basaltic to rhyolitic lavas which imply effusive character. Then we have volcanosedimentary unit composed of pyroclastic formations (lapilli tuff, breccia, ash deposit and ignimbrites) and the pillow-lavas. Indeed, the presence of this last shows clearly that an explosive volcanism and a submarine effusive volcanism have occurred during during the setting of Toumodi-Fètêkro belt. Plutonic uni

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Jackson, S. L., and R. H. Sutcliffe. "Central Superior Province geology: evidence for an allochthonous, ensimatic, southern Abitibi greenstone belt." Canadian Journal of Earth Sciences 27, no. 4 (1990): 582–89. http://dx.doi.org/10.1139/e90-054.

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Published U–Pb geochronological, geological, and petrochemical data suggest that there are late Archean ensialic greenstone belts (GB) (Michipicoten GB and possibly the northern Abitibi GB), ensimatic greenstone belts (southern Abitibi GB and Batchawana GB), and possibly a transitional ensimatic–ensialic greenstone belt (Swayze GB) in the central Superior Province. This lateral crustal variability may preclude simple correlation of the Michipicoten GB and its substrata, as exposed in the Kapuskasing Uplift, with that of the southern Abitibi GB. Furthermore, this lateral variability may have de

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Reimer, Thomas O. "Arcbaean Baryte Deposits of Southern Africa." Journal Geological Society of India 35, no. 2 (1990): 131–50. http://dx.doi.org/10.17491/jgsi/1990/350202.

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Abstract The major Southern African baryte deposits of Archaean age are of stratiform nature -and can be subdivided into two main groups. (1) Volcanogenic-exhalative deposits in the Swaziland Super-group of the Barberton greenstone belt, as well as possibly in similar rocks in Botswana and Zimbabwe. These deposits, with a strike length of up to 9 km, are frequently associated with sulphide mineralization. (2) Placer deposits in the Fig Tree Group of the Barberton belt. These formed through erosion of contemporaneous and/or mostly older volcanogenic-exhalative baryte deposits over a well-docume

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