Origin and global tectonic significance of Early Archean cherts from the Marble Bar greenstone belt, Pilbara Craton, Western Australia

Kato, Yasuhiro

doi:10.1016/s0301-9268(03)00043-3

Cited by 109 publications

(81 citation statements)

References 70 publications

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“…As such, it provides a key indicator for plate tectonics in the rock record. The proposal that an ocean plate stratigraphy is preserved in the Marble Bar greenstone belt in the Pilbara craton, supported by trace element geochemical data (Kato & Nakamura 2003), and in the Isua greenstone belt in Greenland (Komiya et al 1999), suggests that ridge-trench movements and therefore plate tectonics were in operation in the Palaeoarchaean.…”

Section: Plate Reorganizationmentioning

confidence: 93%

“…The biostratigraphy, structure, and geochemistry of this offscraped sequence has been studied in, for example, Phanerozoic circum-Pacific orogens in Japan Matsuda & Isozaki 1991;Kimura & Hori 1993;Kato et al 2002), California (Cowan & Page 1975;Sedlock & Isozaki 1990;Isozaki & Blake 1994), Alaska (Kusky & Bradley 1999;Kusky & Young 1999), Eastern Australia (Cawood 1982(Cawood , 1984Fergusson 1985) and New Zealand (Coombs et al 1976;Mortimer 2004). Imbricated ocean plate stratigraphy is also increasingly recognized in Precambrian orogens; for example, in the 600 Ma Mona Complex of Anglesey, North Wales (Kawai et al 2006(Kawai et al , 2007Maruyama et al in press), the 2.7 Ga Point Lake greenstone belt (Kusky 1991), and possibly the 3.5 Ga chertclastic sequence in the Archaean Pilbara craton (Kato et al 1998;Kato & Nakamura 2003) and the 3.8 Ga Isua greenstone belt, West Greenland (Komiya et al 1999). However, the validity of the Pilbara successions as an imbricated ocean-plate has been questioned by Van Kranendonk et al (2007), who favoured a plume-related intracontinental setting.…”

Section: Accretionary Prismsmentioning

confidence: 99%

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Accretionary orogens through Earth history

et al. 2009

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Accretionary orogens form at intraoceanic and continental margin convergent plate boundaries. They include the supra-subduction zone forearc, magmatic arc and back-arc components. Accretionary orogens can be grouped into retreating and advancing types, based on their kinematic framework and resulting geological character. Retreating orogens (e.g. modern western Pacific) are undergoing long-term extension in response to the site of subduction of the lower plate retreating with respect to the overriding plate and are characterized by back-arc basins. Advancing orogens (e.g. Andes) develop in an environment in which the overriding plate is advancing towards the downgoing plate, resulting in the development of foreland fold and thrust belts and crustal thickening. Cratonization of accretionary orogens occurs during continuing plate convergence and requires transient coupling across the plate boundary with strain concentrated in zones of mechanical and thermal weakening such as the magmatic arc and back-arc region. Potential driving mechanisms for coupling include accretion of buoyant lithosphere (terrane accretion), flat-slab subduction, and rapid absolute upper plate motion overriding the downgoing plate. Accretionary orogens have been active throughout Earth history, extending back until at least 3.2 Ga, and potentially earlier, and provide an important constraint on the initiation of horizontal motion of lithospheric plates on Earth. They have been responsible for major growth of the continental lithosphere through the addition of juvenile magmatic products but are also major sites of consumption and reworking of continental crust through time, through sediment subduction and subduction erosion. It is probable that the rates of crustal growth and destruction are roughly equal, implying that net growth since the Archaean is effectively zero.Classic models of orogens involve a Wilson cycle of ocean opening and closing with orogenesis related to continent-continent collision. These imply that mountain building occurs at the end of a cycle of ocean opening and closing, and marks the termination of subduction, and that the mountain belt should occupy an internal location within an assembled continent (supercontinent). The modern Alpine -Himalayan chain exemplifies the features of this model, lying between the Eurasian and colliding African and Indian plates (Fig.

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Section: Plate Reorganizationmentioning

confidence: 93%

Section: Accretionary Prismsmentioning

confidence: 99%

Accretionary orogens through Earth history

et al. 2009

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“…mentary rocks (e.g., Sugisaki et al, 1982;Kato et al, 2002;Kato and Nakamura, 2003), because Ti and Al are generally insoluble in natural waters (Brookins, 1988). However, we should keep in mind that the Al 2 O 3 -TiO 2 diagram cannot be used for this purpose when marine sediments contain a hydrogenetic ferromanganese component.…”

Section: Major Element Features Of the Kunimiyama Oresmentioning

confidence: 99%

Rare Earth, Major and Trace Elements in the Kunimiyama Ferromanganese Deposit in the Northern Chichibu Belt, Central Shikoku, Japan

Kato¹,

Fujinaga

Nozaki³

et al. 2005

Resource Geology

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. Rare earth, major and trace element geochemistry is reported for the Kunimiyama stratiform ferromanganese deposit in the Northern Chichibu Belt, central Shikoku, Japan. The deposit immediately overlies greenstones of mid‐ocean ridge basalt (MORB) origin and underlies red chert. The ferromanganese ores exhibit remarkable enrichments in Fe, Mn, P, V, Co, Ni, Zn, Y and rare earth elements (excepting Ce) relative to continental crustal abundance. These enriched elements/ Fe ratios and Post‐Archean Average Australian Shale‐normalized REE patterns of the ferromanganese ores are generally analogous to those of modern hydrothermal ferromanganese plume fall‐out precipitates deposited on MOR flanks. However in more detail, Mn and Ti enrichments in the ferromanganese ores are more striking than the modern counterpart, suggesting a significant contribution of hydrogenetic component in the Kunimiyama ores. Our results are consistent with the interpretation that the Kunimiyama ores were umber deposits that primarily formed by hydrothermal plume fall‐out precipitation in the Panthalassa Ocean during the Early Permian and then accreted onto the proto‐Japanese island arc during the Middle Jurassic. The presence of strong negative Ce anomaly in the Kunimiyama ores may indicate that the Early Permian Panthalassa seawater had a more striking negative Ce anomaly due to a more oxidizing oceanic condition than today.

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“…The existence and in particular the onset of early Archean (> 3.0 Ga), present-day style plate tectonics (e.g. de Wit, 1998;Kato and Nakamura, 2003;Furnes et al, 2007) remains controversial (e.g. Foley et al, 2003;Hamilton, 1998;Van Kranendonk et al, 2007), in spite of many studies addressing this topic.…”

Section: Introductionmentioning

confidence: 99%

Making and Breaking of a Continent: Following the Scent of Geodynamic Imprints on the African Continent Using Electromagnetics

Weckmann

2011

Surv Geophys

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The African continent inherits a long history of continental accretion and breakup. The stage of "making" a continent goes back to the Archean, when the first continental masses formed cratons which mostly remained stable ever since. Subsequent collision of weaker continental masses was followed by several extension and compression episodes that resulted in the formation of supercontinents. After the assemblage of Gondwana, a period of predominantly "breaking" , i.e. the breakup of supercontinents, took over. The modern day African continent exhibits different types of margins; continental rifting occurs side by side with recent collision. Since the late 1960's Magnetotelluric (MT) experiments have played an important role in studies of the electrical conductivity structure of Africa. The early results significantly shaped the MT community's understanding of continental scale conductivity belts and basic characteristics of cratons and mobile belts on both crustal and lithospheric mantle scale for some decades. Modern MT studies in Africa have generally supported earlier results with high resistivities observed on cratons and low resistivities observed across mobile belts. Advances in instrumentation, data processing and interpretation resulted in higher resolution images of the lithosphere which in consequence induce an improved understanding of tectonic processes and geological prerequisites for the occurrence of natural resources. The high electrical conductivity of mobile belts and their relation to reactivated fault and detachment zones were often interpreted to characterize mobile belts as tectonic weak zones, which can accommodate stress and constitute zones along which continents can break. Recent breaking of the African continent can be studied on land across the East African rift; however, the lack of amphibian MT experiments across today's margins does not allow for good resolution of remnants of continental break-up processes. Naturally, the regions and the focus of the MT studies in Africa are diverse, but they all contribute to the story of making and breaking a continent.

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Origin and global tectonic significance of Early Archean cherts from the Marble Bar greenstone belt, Pilbara Craton, Western Australia

Cited by 109 publications

References 70 publications

Accretionary orogens through Earth history

Accretionary orogens through Earth history

Rare Earth, Major and Trace Elements in the Kunimiyama Ferromanganese Deposit in the Northern Chichibu Belt, Central Shikoku, Japan

Making and Breaking of a Continent: Following the Scent of Geodynamic Imprints on the African Continent Using Electromagnetics

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