Search Results - "continental crust"

Growth, destruction, and preservation of Earth's continental crust by Spencer, Christopher, Roberts, N., Santosh, M.

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Generation and preservation of continental crust in the Grenville Orogeny by Spencer, Christopher, Cawood, P., Hawkesworth, C., Prave, A., Roberts, N., Horstwood, M., Whitehouse, M.

“…During continental collision, the incorporated continental crust is isolated from crustal recycling processes operative at subduction margins. …”
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How does the continental crust get really hot? by Clark, Chris, Fitzsimons, Ian, Healy, David, Harley, S.

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Peridotite weathering is the missing ingredient of Earth's continental crust composition by Beinlich, Andreas, Austrheim, H., Mavromatis, V., Grguric, B., Putnis, Christine, Putnis, Andrew

“…Here we show that chemical weathering of Ni- and Cr-rich, undifferentiated ultramafic rock equivalent to ~1.3 wt% of today's continental crust compensates for low Ni and Cr in formation models of the continental crust. …”
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Remnants of eoarchean continental crust derived from a subducted proto-arc by Ge, Rongfeng, Zhu, W., Wilde, Simon, Wu, H.

“…Eoarchean [3.6 to 4.0 billion years ago (Ga)] tonalite-trondhjemite-granodiorite (TTG) is the major component of Earth’s oldest remnant continental crust, thereby holding the key to understanding how continental crust originated and when plate tectonics started in the early Earth. …”
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The largest plagiogranite on Earth formed by re- melting of juvenile proto-continental crust by Gamal El Dien, Hamed, Li, Zheng-Xiang, Abu Anbar, Mohamed, Doucet, Luc S, Murphy, J Brendan, Evans, Noreen J, Xia, Xiao-Ping, Li, Jiangyu

“…The growth of continental crust through melt extraction from the mantle is a critical component of the chemical evolution of the Earth and the development of plate tectonics. …”
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Old but gold: Decoding Archean continental crust and related mineral systems with isotopic tools by Zametzer, Andreas

“…Various applications of the Pb–Pb, U–Pb, and Rb–Sr isotopic tools have been explored to better understand the geological history of ancient continental crust in Western Australia. The findings have enhanced knowledge about the formation and evolution of continents early in Earth's history and ore deposits that developed within these continents.…”
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Prediction of the present-day stress field in the Australian continental crust using 3D geomechanical–numerical models by Rajabi, M., Heidbach, O., Tingay, Mark, Reiter, K.

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Role of deep-Earth water cycling in the growth and evolution of continental crust: Constraints from Cretaceous magmatism in southeast China by Li, Zhen, Wang, Xuan-Ce, Wilde, Simon, Liu, L., Li, W., Yang, X.

“…The late Mesozoic igneous province in southeast China provides an excellent opportunity to understand the processes that controlled the growth and evolution of Phanerozoic continental crust. Here we report petrological, whole-rock geochemical and isotopic data, and in situ zircon U–Pb–Lu–Hf isotopic data from granitoids and associated gabbros in the Pingtan and Tong'an complexes, southeast China. …”
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Recycling of metal-fertilized lower continental crust: Origin of non-arc Au-rich porphyry deposits at cratonic edges by Hou, Z., Zhou, Y., Wang, R., Zheng, Y., He, W., Zhao, M., Evans, Noreen, Weinberg, R.

“…The amphibolite xenoliths are enriched in Cu (383-445 ppm) and Au (7-12 ppb), and a few garnet amphibolite xenoliths contain higher Au (6-16 ppb) with higher Au/Cu ratios (2 × 10 -4 to 8 × 10 -4 ) than normal continental crust. These data suggest that metal fertilization of the base of an old arc at the edge of the craton occurred in the Neoproterozoic via subduction modification, and has since been preserved. …”
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Low δ18O zircon grains in the Neoarchean Rum Jungle Complex, northern Australia: An indicator of emergent continental crust by Hollis, J., Van Kranendonk, M.J., Cross, A., Kirkland, Chris, Armstrong, R., Allen, C.

“…New secondary ion mass spectrometry (SIMS) oxygen and laser-ablation–multicollector–inductively coupled plasma–mass spectrometry (LA-MC-ICP-MS) Lu-Hf isotopic results from dated zircon grains in the granitic Neoarchean Rum Jungle Complex provide a minimum time constraint on the emergence of continental crust above sea level for the North Australian craton. …”
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Contrasting zircon Hf and O isotopes in the two episodes of Neoproterozoic granitoids in South China: Implications for growth and reworking of continental crust by Zheng, Y., Zhang, S., Zhao, Z., Wu, Y., Li, X., Li, Zheng-Xiang, Wu, F.

“…In either case, the growth and reworking of continental crust are episodically associated with rift magmatism.…”
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Partial melting of thickened continental crust in central Tibet: Evidence from geochemistry and geochronology of Eocene adakitic rhyolites in the northern Qiangtang Terrane by Long, X., Wilde, Simon, Wang, Q., Yuan, C., Wang, Xuan-Ce, Li, J., Jiang, Z., Dan, W.

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Fluid generation and evolution during exhumation of deeply subducted UHP continental crust: Petrogenesis of composite granite-quartz veins in the Sulu belt, China by Wang, S., Wang, L., Brown, M., Piccoli, P., Johnson, Tim, Feng, P., Deng, H., Kitajima, K., Huang, Y.

“…Thus, the composite granite-quartz veins represent a rare example of a natural system recording how the fluid phase evolved during exhumation of continental crust. The successive availability of different fluid phases attending retrograde metamorphism from UHP eclogite to amphibolite facies conditions will affect the transport of trace elements through the continental crust and the role of these fluids as metasomatic agents interacting with the mantle wedge in the subduction channel.…”
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Cold plumes trigger contamination of oceanic mantle wedges with continental crust-derived sediments: Evidence from chromitite zircon grains of eastern Cuban ophiolites by Proenza, J., González-Jiménez, J., Garcia-Casco, A., Belousova, E., Griffin, W., Talavera, Cristina, Rojas-Agramonte, Y., Aiglsperger, T., Navarro-Ciurana, D., Pujol-Solà, N., Gervilla, F., O'Reilly, S., Jacob, D.

“…Hence, chromitite zircon grains are interpreted as sedimentary-derived xenocrystic grains that were delivered into the mantle wedge beneath the Greater Antilles intra-oceanic volcanic arc by metasomatic fluids/melts during subduction processes. Thus, continental crust recycling by subduction could explain all populations of old xenocrystic zircon in Cretaceous mantle-hosted chromitites from eastern Cuba ophiolite. …”
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Detrital zircon U–Pb age and Hf isotope constrains on the generation and reworking of Precambrian continental crust in the Cathaysia Block, South China: A synthesis by Li, X., Li, Zheng-Xiang, Li, W.

“…Reworking and recycling of the continental crust are likely the dominant processes for the crustal evolution of Cathaysia during the Mesoproterozoic to Neoproterozoic time, with an intervenient period of significant generation of juvenile crust at ~ 1.0 Ga. …”
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The carbonate tectonic units of northern Calabria (Italy): a record of Apulian palaeomargin evolution and Miocene convergence, continental crust subduction, and exhumation of HP-LT rocks. by Reddy, Steven

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Jack Hills (Yilgarn, Western Australia) by Wilde, Simon

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The North Makassar Straits: what lies beneath? by Hall, R., Cloke, I., Nur'aini, S., Puspita, S., Elders, Chris

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Pliocene granodioritic knoll with continental crust affinities discovered in the intra-oceanic Izu-Bonin-Mariana Arc: Syntectonic granitic crust formation during back-arc rifting by Tani, K., Dunkley, Daniel, Chang, Q., Nichols, A., Shukuno, H., Hirahara, Y., Ishizuka, O., Arima, M., Tatsumi, Y.

“…A widely held hypothesis is that modern continental crust of an intermediate (i.e. andesitic) bulk composition forms at intra-oceanic arcs through subduction zone magmatism. …”
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