![]() ![]() Geol Soc Amer Bull 81:409–420īateman PC, Clark LD, Huber NK, Moore JG, Reinhart CD (1963) The Sierra Nevada batholith-a synthesis of recent work across the central part. US Geol Survey Prof Paper 1483:186īateman PC, Dodge FC (1970) Variations of major element chemical constituents across the central Sierra Nevada batholith. US Geol Survey Prof Pap 470:208īateman PC (1992) Plutonism in the central part of the Sierra Nevada batholith, California. Elsevier, Amsterdam, pp 1–12īateman PC (1965) Geology and tungsten mineralization of the Bishop district California. In: Barker F (ed) Trondjhemites, Dacites and related rocks. US Geol Survey Open-File Report 87–589īarker F (1979) Trondhjemite: definition, environment and hypotheses of origin. Contrib Mineral Petrol 98:224–256īacon CR, Hildreth W, Druitt TH (1987) Partition coefficients determined from phenocryst and glass analyses of the climatic ejecta of Mount Mazama, Oregon. Tectonophysics 161:201–212īacon CR, Druitt TH (1988) Compositional evolution of the zoned calcalkaline magma chamber of Mount Mazama, Crater Lake, Oregon. Geochim Cosmochim Acta 53:197–214Īrndt NT, Goldstein SL (1989) An open boundary between lower continental crust and mantle: its role in crust formation and crustal recycling. Nature 286:335–342Īnders E, Grevesse N (1989) Abundances of the elements: meteoritic and solar. ![]() Geol Soc Amer Bull 100:891–911Īllegre CJ, Othman DB (1980) Nd–Sr isotopic relationship in granitoid rocks and continental crust development: a chemical approach to orogenesis. Voluminous gabbroic residues of partial melting may be lost to the mantle by their conversion to garnet-pyroxene assemblages during batholithic magmatic crustal thickening.Īgue JJ, Brimhall GH (1988) Regional variations in bulk chemistry, mineralogy, and the compositions of mafic and accessory minerals in the batholiths of California. Granitic partial melts derived by this process may also be silicic end members for mixing events leading to large-volume intermediate composition Sierran plutons such as the Cretaceous Lamarck Granodiorite. These results are evidence that the El Capitan Granite, and perhaps similar intrusions in the Sierra Nevada batholith with lithospheric-mantle-like isotopic values, were extracted from LILE-enriched, hydrous (hornblende-bearing) gabbroic rocks in the Sierran lower crust. in Contrib Mineral Petrol 148:635–661, 2005) have major-element and modeled trace-element (REE, Rb, Ba, Sr, Th, U) compositions matching those of the Cretaceous El Capitan Granite, a prominent granite and silicic granodiorite pluton in the central part of the Sierra Nevada batholith (Yosemite, CA, USA) locally mingled with coeval, isotopically similar quartz diorite through gabbro intrusions (Ratajeski et al. Low-temperature (825 and 850☌) partial melts synthesized at 700 MPa in biotite-hornblende gabbros from the central Sierra Nevada batholith (Sisson et al. Partial melting of mafic intrusions recently emplaced into the lower crust can produce voluminous silicic magmas with isotopic ratios similar to their mafic sources. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |