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A nested diapir model for the reversely zoned Turtle Pluton, southeastern California

Published online by Cambridge University Press:  03 November 2011

Charlotte M. Allen
Charlotte M. Allen
Affiliation:
C. M. Allen,Department of Geology, The Australian National University, GPO Box 4, Canberra City, ACT 2601, Australia
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Abstract

Most zoned plutons described in the geological literature have mafic rims and felsic cores and are referred to as “normally zoned”, whereas relatively few “reversely zoned” intrusions (felsic rims and mafic cores) have been described. That unusual zonation pattern has been variously attributed to in situ processes or to the reordering of an underlying, vertically stratified, magma chamber either by intrusion through an orifice or by emplacement of composite diapirs. The Turtle Pluton is an early Cretaceous, reversely zoned, intrusion that is divided into four facies: a Rim Sequence that is graditionally zoned from bt + ilm + muse monzogranite to hb + bt + mt + sph granodiorite; a Core Facies of more homogeneous hb + bt + mt + sph granodiorite to quartz monzodiorite; between these two facies, a structural discontinuity termed the Schlieren Zone; and an Eastern Facies of monzogranite to granodiorite. Field relationships, distribution of strain, and geochemical and isotopic studies (including a range of initial87Sr/86Sr from 0·7085–0·7065) suggest that the reverse zonation of the Turtle Pluton is the result of sequential emplacement of two diapirs each derived from the same underlying, vertically stratified, magma chamber, and that the Rim Sequence zonation is chiefly the result of mixing of intermediate and felsic magmas from distinct sources accompanied by minor fractional crystallisation.

Keywords

early Cretaceousmafic enclavesmagma mixingMojave Desertsource rocks
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 83 , Issue 1-2: Second Hutton Symposium: The Origin of Granites and Related Rocks , 1992 , pp. 179 - 190
Copyright
Copyright © Royal Society of Edinburgh 1992

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References

Allen, C. M. 1989. Petrogenesis of the reversely zoned Turtle pluton, southeastern California. Unpublished Ph.D. Thesis, Virginia Polytechnic Institute and State University.Google Scholar
Allen, C. M. 1991. Local equilibrium of mafic enclaves and granitoids of the Turtle pluton, S.E. California: mineral chemical and isotopic evidence. AM MINERAL 76, 574–88.Google Scholar
Ayuso, R. A. 1984. Field relations, crystallization, and petrography of reversely zoned granitic pluton in the Bottle Lake Complex, Maine. PROF PAP US GEOL SURV 1320.Google Scholar
Bateman, P. C. & Chappell, B. W. 1979. Crystallization, fractionation, and solidification of the Tuolume Intrusive Series, Yosemite National Park, California. BULL GEOL SOC AM 90 465–82.Google Scholar
Bateman, P. C. & Wones, D. R. 1972. Geologic map of the Huntington Lake quadrangle, central Sierra Nevada, California. US GEOL SURV QUADRANGLE MAP GQ 987.Google Scholar
Bourne, J. & Danis, D. 1987. A proposed model for the formation of reversely zoned plutons based on a study of the Lacorne Complex, Superior Province, Quebec, CAN J EARTH SCI 24, 2506–20.CrossRefGoogle Scholar
Bowen, N. L. 1922. The reaction principal in petrogenesis. J. GEOL 30, 177–98.CrossRefGoogle Scholar
Chappell, B. W., White, A. J. R. & Wyborn, D. 1987. The importance of residual source material (restite) in granite petrogenesis. J PETROL 28, 1111–38.Google Scholar
Courrioux, G. 1987. Oblique diapirism: the Criffell granodiorite/granite zoned pluton (southwest Scotland). J STRUCTURAL GEOL 9, 313–30.CrossRefGoogle Scholar
DePaolo, D. J. 1981. Trace element and isotopic effects of combined wallrock assimilation and fractional crystallization. EARTH PLANET SCI LETT 53, 189–202.CrossRefGoogle Scholar
DePaolo, D. J. & Wasserburg, G. L. 1976. Inferences about magma sources and mantle structure from variations of 143Nd/M4Nd. GEOPHYS RES LETT 7, 743–6.CrossRefGoogle Scholar
Dilles, J. H. 1987. Petrology of the Yerrington Batholith, Nevada: evidence for evolution of porphyry copper ore deposits. ECON GEOL 82, 1750–89.Google Scholar
Ermanovics, I. F. 1970. Zonal structure of the Perth Road monzonite, Grenville Province, Ontario. CAN J EARTH SCI 7, 414–34.Google Scholar
Fridrich, C. J. & Mahood, G. A. 1984. Reverse zoning in the resurgent intrusions of the Grizzly Peak cauldron, Sawatch Range, Colorado. BULL GEOL SOC AM 95, 779–87.Google Scholar
Frost, T. P. & Mahood, G. A. 1987. Field, chemical, and physical constraints on mafic-felsic magma interaction in the Lamark Granodiorite, Sierra Nevada, California. BULL GEOL SOC AM 99, 272–91.2.0.CO;2>CrossRefGoogle Scholar
Hewitt, D. A. & Wones, D. R. 1984. Experimental phase relations of the micas. In Bailey, S. W. (ed.) Micas MINERAL SOC AM, REV MINERAL 13, 201–56.Google Scholar
Hibbard, M. J. 1981. The magma mixing origin of mantled feldspars. CONTRIB MINERAL PETROL 76, 158–70.CrossRefGoogle Scholar
Howard, K. A., Stone, P., Pernokas, M. A. & Marvin, R. F. 1982. Geologic and geochronologic reconnaissance of the Turtle Mountains area, California: West border of the Whipple detachment terrane. In Frost, E. G. & Martin, D. L. (eds) Mesozoic-Cenozoic Tectonic Evolution of the Colorado River Region, California, Arizona, and Nevada, 314–54. San Diego: Cordilleran Publishers.Google Scholar
Howard, K. A., Nielson, J. E., Simpson, R. W., Hazlett, R. W., Alminas, H. V., Nakata, J. K. & McDonnell, J. R. Jr, 1988. Mineral Resources of the Turtle Mountains Wilderness Study Area, San Bernardino County, California. BULL US GEOL SURV 1717–B.Google Scholar
Howard, K. A. & John, B. E. 1988. Crustal extension along a rooted system of imbricate low-angle faults: Colorado River extensional corridor, California and Arizona. In Dewey, J. F. & Hancock, P. L. (eds) Continental Extensional Tectonics. GEOL SOC LONDON SPEC PAP 28, 299–311.CrossRefGoogle Scholar
Hutton, D. H. W. 1982. A method for the determination of initial shape of deformed xenoliths. TECTONOPHYSICS 85, 45–50.CrossRefGoogle Scholar
Hutton, D. H. W. 1988. Granite emplacement mechanisms and tectonic controls: inferences from deformation studies TRANS R SOC EDINBURGH EARTH SCI 79, 245–55.Google Scholar
Langmuir, C. H., Vocke, R. D. & Hanson, G. N. 1977. A general mixing equation with applications to Icelandic basalts. EARTH PLANET SCI LETT 37, 380–92.Google Scholar
Le Bas, M. J. & Streckeisen, A. L. 1991. THE IUGS systematics of igneous rocks. J. GEOL SOC LONGON 148, 825–33.CrossRefGoogle Scholar
Loomis, T. P. 1982. Numerical simulations of crystallization processes of plagioclase in complex melts: the origin of irregular and oscillatory zoning in plagioclase. CONTRIB MINERAL PETROL 81, 219–29.Google Scholar
Loomis, T. P. & Welber, P. W. 1982. Crystallization processes in the Rocky Hill Granodiorite pluton, California: an interpretation based on compositional zoning of plagioclase. CONTRIB MINERAL PETROL 81, 230–9.Google Scholar
McBirney, A. R., Baker, B. H. & Nilson, R. H. 1985. Liquid factionation. Part I: basic principles and experimental simulations. J. VOLCANOL GEOTHERM RES 24, 1–24.CrossRefGoogle Scholar
Nabelek, P. I., Papike, J. J. & Laul, J. C. 1986. The Notch Peak Granite Stock, Utah: Origin of reverse zoning and petrogenesis. J PETROL 27, 1035–9.Google Scholar
Naney, M. T. 1983. Phase equilibria of rock-forming ferromagnesian silicates in granitic systems. AM J SCI 283, 993–1033.CrossRefGoogle Scholar
Nironen, M. 1989. Emplacement and structural setting of granitoids in the Early Proterozoic Tampere and Savo Melts, Finland—implications for contrasting crustal evolution. BULL GEOL SURV FINLAND 346.Google Scholar
Ramsay, J. C. 1989. Emplacement kinematics of a granite diapir: the Chindamore batholith, Zimbabwe, J. STRUCT GEOL 11, 191–209.CrossRefGoogle Scholar
Sparks, R. S. J. & Marshall, L. A. 1986. Thermal and mechanical constraints on mixing between mafic and silicic magmas. J VOLCANOL GEOTHERM RES 29, 99–124.Google Scholar
Speer, J. A. 1987. Evolution of magmatic AFM mineral assemblages in granitoid rocks: the hornblende + melt = biotite reaction in the Liberty Hill pluton, South Carolina. AM MINERAL 72, 863–78.Google Scholar
Waugh, B. J. 1985. The origin of mafic enclaves within a granodioritic pluton of the Turtle Mountains, California, Unpublished B.Sc. Thesis, Carleton College.Google Scholar
Wernicke, R. S. 1987. Geology petrography and geochemistry of the El Topo Pluton, Baja, California Norte, Mexico. Unpublished MS Thesis, San Diego State University,Google Scholar
White, A. J. R. & Chappell, B. W. 1977. Ultrametamorphism and granitoid genesis. TECTONOPHYSICS 43, 7–22.CrossRefGoogle Scholar
Wones, D. R. & Gilbert, M. C. 1982. Amphiboles in the igneous environment. In Veblen, D. R. and Ribbe, P. H. (eds) Amphiboles: petrology and experimental phase relations. MINERAL SOC AM, REV MINERAL 9B, 355–90.Google Scholar
Zen, , E-an, . 1988. Phase relations of peraluminous granitic rocks and their petrogenetic implications. ANN REV EARTH PLANET SCI 16, 21–51.CrossRefGoogle Scholar