{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,5]],"date-time":"2026-06-05T05:43:19Z","timestamp":1780638199498,"version":"3.54.1"},"reference-count":78,"publisher":"Oxford University Press (OUP)","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[1997,3,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>The metaluminous to weakly peraluminous A-type granites of the Lachlan Fold Belt are a distinctive group of igneous rocks, on the basis of chemical and mineralogical criteria. Those granites that contain \u223c65\u201372% SiO2 can be distinguished from other types on the basis of higher abundances of Fetotal\/(Fetotal + Mg), high field strength elements, trivalent rare earth elements, Ga and Zn. Mineralogically, they contain Fe-rich hydrous mafic minerals and primary ilmenite, and hence are reduced relative to the Ni\u2013NiO buffer. However, the extremely felsic A-type granites (SiO2&amp;gt; \u223c72%) have the same chemical and mineralogical characteristics as felsic, fractionated I-type granites. Recent analyses indicate that the Lachlan Fold Belt A-type granites have Sc, F, alkali element, trace transition element and H2O contents similar to those of other unfractionated I-type granites. Rb\u2013Sr and Nd\u2013Sm isotopic compositions are highly variable, probably reflecting source region heterogeneity. The metaluminous to weakly peraluminous A-type granites of the Lachlan Fold Belt are distinct from peralkaline rocks in terms of chemical composition, petrography and field associations, although these rocks have been grouped together as a single type in current classification schemes. We propose that the metaluminous to weakly peraluminous A-type granites, such as those of the Lachlan Fold Belt, should be defined as \u2018aluminous A-type\u2019 granites and should not be grouped with peralkaline granites. The Lachlan Fold Belt aluminous A-type granites have relatively high calculated zircon saturation temperatures. We suggest that these granites were produced by high-temperature partial melting of a felsic infracrustal source.<\/jats:p>","DOI":"10.1093\/petroj\/38.3.371","type":"journal-article","created":{"date-parts":[[2012,4,17]],"date-time":"2012-04-17T08:20:42Z","timestamp":1334650842000},"page":"371-391","source":"Crossref","is-referenced-by-count":1183,"title":["Characterization and Origin of Aluminous A-type Granites from the Lachlan Fold Belt, Southeastern Australia"],"prefix":"10.1093","volume":"38","author":[{"given":"P.L.","family":"King","sequence":"first","affiliation":[{"name":"Department of Geology, Australian National University 1 \u00a0 \u00a0 Canberra, A.C.T. 0200, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.J.R.","family":"White","sequence":"additional","affiliation":[{"name":"VIEPS, Department of Earth Sciences, Melbourne University 2 \u00a0 \u00a0 Parkville, VIC. 3052, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B.W.","family":"Chappell","sequence":"additional","affiliation":[{"name":"Department of Geology, Australian National University 1 \u00a0 \u00a0 Canberra, A.C.T. 0200, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C.M.","family":"Allen","sequence":"additional","affiliation":[{"name":"Department of Geology, Australian National University 1 \u00a0 \u00a0 Canberra, A.C.T. 0200, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[1997,3,1]]},"reference":[{"key":"2025102822212023700_b1","doi-asserted-by":"crossref","first-page":"289","DOI":"10.2475\/ajs.280.4.289","article-title":"Mineral equilibria and crystallization conditions in the late Precambrian Wolf River rapakivi massif, Wisconsin","volume":"280","author":"Anderson","year":"1980","journal-title":"American Journal of Science"},{"key":"2025102822212023700_b2","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1130\/MEM161-p133","article-title":"Proterozoic anorogenic granite plutonism of North America","volume":"161","author":"Anderson","year":"1983","journal-title":"Geological Society of America Memoir"},{"key":"2025102822212023700_b3","doi-asserted-by":"crossref","first-page":"287","DOI":"10.1016\/0301-9268(78)90045-1","article-title":"Geochemistry and evolution of the Wolf River Batholith: a late Precambrian rapakivi massif in north Wisconsin, U.S.A","volume":"7","author":"Anderson","year":"1978","journal-title":"Precambrian Research"},{"key":"2025102822212023700_b4","unstructured":"Atkinson\n              P.\n            \n          \n          Geology and geochemistry of the Victoria Valley Batholith, Grampians Ranges, south-eastern Australia\n          1976\n          Unpublished B.Sc. Honours Thesis, La Trobe University, Melbourne, Vic"},{"key":"2025102822212023700_b5","doi-asserted-by":"crossref","first-page":"737","DOI":"10.1007\/BF02596906","article-title":"Peralkaline acid volcanic rocks of oceanic islands","volume":"38","author":"Baker","year":"1974","journal-title":"Bulletin of Volcanology"},{"key":"2025102822212023700_b6","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1016\/0301-9268(75)90001-7","article-title":"The Pikes Peak Batholith, Colorado Front Range, and a model for the origin of the gabbro\u2013anorthosite\u2013syenite\u2013potassic granite suite","volume":"2","author":"Barker","year":"1975","journal-title":"Precambrian Research"},{"key":"2025102822212023700_b7","first-page":"24","article-title":"The Mount Hope Group and its comagmatic granites on the Mount Allen 1:100 000 Sheet, New South Wales","author":"Barron","year":"1982","journal-title":"Quarterly Notes New South Wales Geological Survey"},{"issue":"(B11)","key":"2025102822212023700_b8","doi-asserted-by":"crossref","first-page":"17797","DOI":"10.1029\/JB095iB11p17797","article-title":"Enclaves from the A-type granite of the M\u00e9gantic Complex, White Mountain magma series: clues to granite magmagenesis","volume":"95","author":"B\u00e9dard","year":"1990","journal-title":"Journal of Geophysical Research"},{"key":"2025102822212023700_b9","doi-asserted-by":"crossref","first-page":"425","DOI":"10.1007\/BF00372289","article-title":"Age, origin and evolution of the anorogenic complex of Evisa (Corsica): a K\u2013Li\u2013Rb\u2013Sr study","volume":"65","author":"Bonin","year":"1978","journal-title":"Contributions to Mineralogy and Petrology"},{"key":"2025102822212023700_b10","author":"Bowen","year":"1928","journal-title":"The Evolution of the Igneous Rocks"},{"key":"2025102822212023700_b11","unstructured":"Budd\n              A. R.\n            \n          \n          Internal differentiation and mineralization of the Banshea pluton, New South Wales\n          Unpublished B.Sc. Honours Thesis, Australian National University, Canberra, A.C.T"},{"key":"2025102822212023700_b12","first-page":"1","article-title":"Late-stage processes of felsic magmatism","volume":"8","author":"Burnham","year":"1980","journal-title":"Mining Geology, Special Issue"},{"key":"2025102822212023700_b13","unstructured":"Camacho\n              A.\n            \n          \n          Geochemistry of some fractionated western Tasmanian granites\n          1987\n          Unpublished M.Sc. 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J.\n            \n          \n          Gabo Island Granite Suite\n          1977\n          Unpublished B.Sc. 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J.\n            \n          \n          The petrology and geochemistry of Mid to Late Palaeozoic magmatism in the Temora region, New South Wales\n          1991\n          Unpublished Ph.D. Thesis, La Trobe University, Melbourne, Vic"},{"key":"2025102822212023700_b75","doi-asserted-by":"crossref","first-page":"209","DOI":"10.1080\/14400958808527941","article-title":"Peralkaline granites near Temora, southern New South Wales: tectonic and petrological implications","volume":"35","author":"Wormald","year":"1988","journal-title":"Australian Journal of Earth Sciences"},{"key":"2025102822212023700_b76","author":"Wyborn","year":"1986","journal-title":"Araluen, N.S.W.\u20141:100 000 Geological Map Commentary"},{"key":"2025102822212023700_b77","doi-asserted-by":"crossref","first-page":"21","DOI":"10.1080\/08120098708729392","article-title":"The Boggy Plain Supersuite: a distinctive belt of I-type igneous rocks of potential economic significance in the Lachlan Fold Belt","volume":"34","author":"Wyborn","year":"1987","journal-title":"Australian Journal of Earth Sciences"},{"key":"2025102822212023700_b78","unstructured":"Yacopetti\n              C. M.\n            \n          \n          The A-type granites of the Lachlan Fold Belt\n          1987\n          Unpublished B.Sc. 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