Academic literature on the topic 'A-type charnockites'
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Journal articles on the topic "A-type charnockites"
Kilpatrick, Jonathan A., and David J. Ellis. "C-type magmas: igneous charnockites and their extrusive equivalents." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 83, no. 1-2 (1992): 155–64. http://dx.doi.org/10.1017/s0263593300007847.
Full textBhattacharya, S., S. K. Sen, and A. Acharyya. "Structural evidence supporting a remnant origin of patchy charnockites in the Chilka Lake area, India." Geological Magazine 130, no. 3 (May 1993): 363–68. http://dx.doi.org/10.1017/s0016756800020045.
Full textQIU, XIAO-FEI, XIAO-MING ZHAO, HONG-MEI YANG, SHAN-SONG LU, TUO JIANG, and NIAN-WEN WU. "Petrogenesis of the Early Palaeozoic granitoids from the Yunkai massif, South China block: implications for a tectonic transition from compression to extension during the Caledonian orogenic event." Geological Magazine 155, no. 8 (October 2, 2017): 1776–92. http://dx.doi.org/10.1017/s0016756817000796.
Full textWhitney, Philip R. "Charnockites and granites of the western Adirondacks, New York, USA: a differentiated A-type suite." Precambrian Research 57, no. 1-2 (June 1992): 1–19. http://dx.doi.org/10.1016/0301-9268(92)90092-3.
Full textSajna, S., J. K. Tomson, J. Amal Dev, Nilanjana Sorcar, and T. Vijaya Kumar. "Neoproterozoic Mafic Magmatism in Nagercoil Block, Southern India and Its Implications on the Gondwana Collisional Orogeny." Minerals 12, no. 12 (November 26, 2022): 1509. http://dx.doi.org/10.3390/min12121509.
Full textOlabode, Oluwaseun Franklin, and Yinusa Ayodele Asiwaju-Bello. "Insights from the Engineering Geological Mapping of Four Basement Rocks Derived Soils." Sustainable Geoscience and Geotourism 2 (November 2018): 16–34. http://dx.doi.org/10.18052/www.scipress.com/sgg.2.16.
Full textDuchesne, J. C., and E. Wilmart. "Igneous Charnockites and Related Rocks from the Bjerkreim-Sokndal Layered Intrusion (Southwest Norway): a Jotunite (Hypersthene Monzodiorite)-Derived A-type Granitoid Suite." Journal of Petrology 38, no. 3 (March 1, 1997): 337–69. http://dx.doi.org/10.1093/petroj/38.3.337.
Full textKarniol, Tiago R., Rômulo Machado, and Nolan M. Dehler. "Transpressive dextral shear in the Italva-Itaperuna section, Northern State of Rio de Janeiro, Brazil." Anais da Academia Brasileira de Ciências 80, no. 3 (September 2008): 565–77. http://dx.doi.org/10.1590/s0001-37652008000300016.
Full textAyodele, Olusiji Samuel. "Geochemical Exploration for Heavy Metals in the Stream Sediments of Okemesi-Ijero Area." Journal of Advance Research in Applied Science (ISSN: 2208-2352) 3, no. 4 (April 30, 2018): 01–29. http://dx.doi.org/10.53555/nnas.v3i4.648.
Full textOkon, Emmanuel E., Ebenezer A. Kudamnya, Kehinde D. Oyeyemi, Benjamin O. Omang, Omotayo Ojo, and Mohamed Metwaly. "Field Observations and Geophysical Research Applied to the Detection of Manganese (Mn) Deposits in the Eastern Part of Oban Massif, South-Eastern Nigeria: An Integrated Approach." Minerals 12, no. 10 (September 30, 2022): 1250. http://dx.doi.org/10.3390/min12101250.
Full textDissertations / Theses on the topic "A-type charnockites"
Rowe, S. E. "Mechanism of formation and age of the Ayyarmalai A-type charnockite – granite association from the south-eastern Palghat- Cauvery Shear System, southern India." Thesis, 2010. http://hdl.handle.net/2440/104030.
Full textThe Ayyarmalai A-type charnockite and A-type alkali granite lies on the south-eastern margin of the Palghat-Cauvery Shear System and provides an example of co-magmatism that was later overprinted with granulite facies metamorphism at ~2.45-2.5Ga. The Palghat-Cauvery Shear System represents an intriguing zone with Neoproterozoic aged granulites (~800-500 Ma) to the south and Archaean granulites (~3000-2500 Ma) to the north; the origins of which are still often disputed. This study presents whole rock major and trace element compositions, mineral chemistry, pressure-temperature estimates and whole rock Sm-Nd, Rb-Sr, Pb-Pb and δ18O isotopic compositions of this A-type charnockite-granite association found at Ayyarmalai, Tamil Nadu, Southern India. The subsequent data from this study suggests that: (1) the Ayyarmalai charnockites from the Palghat-Cauvery Shear System have zircon ages that are synchronous with events in the Northern Granulite Terrain; (2) The Dharwar Craton is a strong candidate for the protolith of these rocks; (3) Evidence of a Neoproterozoic-Cambrian granulite metamorphic event (~520 Ma) appears to be absent in these rocks questioning the existence or location of a Neoproterozoic - Cambrian suture zone proposed for the Palghat-Cauvery Shear System recently. U-Pb zircon ages show zoned igneous cores ~2.65-2.68 Ga ages in both rock types defining the crystallisation age, while the large metamorphic rim overgrowths date the Archaean granulite metamorphic event at ~2.45 - 2.5 Ga. Geochemical data of the Ayyarmalai charnockites reveal a very primitive, unfractionated REE pattern with no Eu-anomaly, ferroan, high K-calc-alkaline, with moderate enrichment of LREE with respect to HREE and fall within the field of high Ba-Sr type granitoids. Extraction of Pyroxene- Hornblende rich cumulates resulted in an intermediate charnockites driving the crystallisation towards the final A-type alkali granite. The A-type alkali granites show a more fractionated REE pattern with a significant Eu-anomaly, ferroan, high-K- calc-alkaline, with enrichment of LREE and depletion in the low Ba-Sr type granitoids. εNd and Nd model ages indicate a highly evolved protolith (εNd(0) =-25.15 to -33.14) that encountered a crustal Archaean source (2.89-3.09 Ga) causing contamination as the magmas ascended. Harker diagrams, Nd data (isochron age, ~2519 Ma) and U-Pb zircon crystallisation ages suggest a co-magmatic relationship between the charnockite and alkali granite. Conventional geothermometry/barometry suggest minimum pressure-temperature conditions existed at 740 – 750°C and P=5.61 – 5.84 kbar. The data presented from this study is consistent with a magmatic origin of these charnockites favouring the early crystallisation of orthopyroxene. The correlation with the data from the Dharwar Craton suggest that the study region may have encountered Dharwar Craton on magmatic ascent causing crustal contamination
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2010
Book chapters on the topic "A-type charnockites"
Indares, Aphrodite, Abdelali Moukhsil, and Pierre-Arthur Groulier. "Geon 14 to early Geon 13 granitoid magmatism in the Grenville Province of Canada, northeastern Laurentia: Distribution, geochemical patterns, and links with an active-margin setting." In Laurentia: Turning Points in the Evolution of a Continent. Geological Society of America, 2022. http://dx.doi.org/10.1130/2022.1220(17).
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