Diffusive Isotopic Contamination of Mafic Magma by Coexisting Silicic Liquid in the Muskox Intrusion
Abstract
Shifts in 87Sr/86Sr and 143Nd/144Nd ratios measured in cumulates from the upper levels of the Muskox mafic intrusion indicate that isotopic and bulk chemical exchange were decoupled across a mafic-silicic liquid interface during crystallization of the intrusion. Modeling of diffusive exchange between liquid layers demonstrates that isotopic compositions of silicate liquids in layered magma chambers may be strongly affected by this process on time scales of 103 to 104 years. Diffusive contamination can be used to place constraints on the physical processes and time scales of magmatic systems.
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References
BAKER, D.R., CHEMICAL INTERDIFFUSION OF DACITE AND RHYOLITE - ANHYDROUS MEASUREMENTS AT 1 ATM AND 10 KBAR, APPLICATION OF TRANSITION-STATE THEORY, AND DIFFUSION IN ZONED MAGMA CHAMBERS, CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 104: 407 (1990).
BAKER, D.R., INTERDIFFUSION OF HYDROUS DACITIC AND RHYOLITIC MELTS AND THE EFFICACY OF RHYOLITE CONTAMINATION OF DACITIC ENCLAVES, CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 106: 462 (1991).
BAKER, D.R., TRACER VERSUS TRACE-ELEMENT DIFFUSION - DIFFUSIONAL DECOUPLING OF SR CONCENTRATION FROM SR ISOTOPE COMPOSITION, GEOCHIMICA ET COSMOCHIMICA ACTA 53: 3015 (1989).
CAMPBELL, I.H., A LABORATORY INVESTIGATION OF ASSIMILATION AT THE TOP OF A BASALTIC MAGMA CHAMBER, JOURNAL OF GEOLOGY 95: 155 (1987).
Clark, S., Magmatic Processes: Physicochemical Principles: 289 (1987).
DEPAOLO, D.J., TRACE-ELEMENT AND ISOTOPIC EFFECTS OF COMBINED WALLROCK ASSIMILATION AND FRACTIONAL CRYSTALLIZATION, EARTH AND PLANETARY SCIENCE LETTERS 53: 189 (1981).
DEPAOLO, D.J., ISOTOPIC STUDIES OF PROCESSES IN MAFIC MAGMA CHAMBERS .1. THE KIGLAPAIT INTRUSION, LABRADOR, JOURNAL OF PETROLOGY 26: 925 (1985).
HALLIDAY, A.N., EVIDENCE FOR LONG RESIDENCE TIMES OF RHYOLITIC MAGMA IN THE LONG VALLEY MAGMATIC SYSTEM - THE ISOTOPIC RECORD IN PRECALDERA LAVAS OF GLASS MOUNTAIN, EARTH AND PLANETARY SCIENCE LETTERS 94: 274 (1989).
HARMER, R.E., FIELD RELATIONS AND STRONTIUM ISOTOPE SYSTEMATICS OF THE MARGINAL ROCKS OF THE EASTERN BUSHVELD COMPLEX, ECONOMIC GEOLOGY 80: 813 (1985).
HARRISON, T.M., KINETICS OF ZIRCON DISSOLUTION AND ZIRCONIUM DIFFUSION IN GRANITIC MELTS OF VARIABLE WATER-CONTENT, CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 84: 66 (1983).
HUPPERT, H.E., THE GENERATION OF GRANITIC MAGMAS BY INTRUSION OF BASALT INTO CONTINENTAL-CRUST, JOURNAL OF PETROLOGY 29: 599 (1988).
HUPPERT, H.E., ON CONVECTIVE STYLE AND VIGOR IN SHEET-LIKE MAGMA CHAMBERS - COMMENT, JOURNAL OF PETROLOGY 32: 851 (1991).
IRVINE, T.N., HEAT TRANSFER DURING SOLIDIFICATION OF LAYERED INTRUSIONS .1. SHEETS AND SILLS, CANADIAN JOURNAL OF EARTH SCIENCES 7: 1031 (1970).
IRVINE, T.N., SPECIAL PUBLICATIONS OF THE GEOLOGICAL SOCIETY OF SOUTH AFRICA 1: 441 (1970).
Irvine, T. N., Physics of Magmatic Processes: 325 (1980).
Irvine, T. N., Ultramafic and Related Rocks: 38 (1967).
JAEGER, J.C., THE TEMPERATURE IN THE NEIGHBORHOOD OF A COOLING INTRUSIVE SHEET, AMERICAN JOURNAL OF SCIENCE 255: 306 (1957).
LESHER, C.E., DECOUPLING OF CHEMICAL AND ISOTOPIC EXCHANGE DURING MAGMA MIXING, NATURE 344: 235 (1990).
LESHER, C.E., TRANSACTIONS OF THE AMERICAN GEOPHYSICAL UNION 72: 309 (1991).
MAGARITZ, M, DIFFUSION OF SR, BA AND NA IN OBSIDIAN, GEOCHIMICA ET COSMOCHIMICA ACTA 42: 595 (1978).
MAGARITZ, M, DIFFUSION OF EU AND GD IN BASALT AND OBSIDIAN, GEOCHIMICA ET COSMOCHIMICA ACTA 42: 847 (1978).
MARSH, B.D., ON CONVECTIVE STYLE AND VIGOR IN SHEET-LIKE MAGMA CHAMBERS, JOURNAL OF PETROLOGY 30: 479 (1989).
MATTINSON, J.M., AGE, ORIGIN, AND THERMAL HISTORIES OF SOME PLUTONIC ROCKS FROM SALINIAN BLOCK OF CALIFORNIA, CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 67: 233 (1978).
OLDENBURG, C.M., SELF-ORGANIZATION IN CONVECTIVE MAGMA MIXING, EARTH-SCIENCE REVIEWS 29: 331 (1990).
OLDENBURG, C.M., DYNAMIC MIXING IN MAGMA BODIES - THEORY, SIMULATIONS, AND IMPLICATIONS, JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS 94: 9215 (1989).
SHIRLEY, D.N., COMPACTION OF IGNEOUS CUMULATES, JOURNAL OF GEOLOGY 94: 795 (1986).
SPARKS, RSJ, EVIDENCE FOR LONG RESIDENCE TIMES OF RHYOLITIC MAGMA IN THE LONG VALLEY MAGMATIC SYSTEM - THE ISOTOPIC RECORD IN PRECALDERA LAVAS OF GLASS MOUNTAIN - REPLY, EARTH AND PLANETARY SCIENCE LETTERS 99: 387 (1990).
STEWART, B.W., ISOTOPIC STUDIES OF PROCESSES IN MAFIC MAGMA CHAMBERS .2. THE SKAERGAARD INTRUSION, EAST GREENLAND, CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 104: 125 (1990).
TRIAL, A.F., NATURAL-CONVECTION BOUNDARY-LAYER FLOWS IN ISOTHERMAL TERNARY-SYSTEMS - ROLE OF DIFFUSIVE COUPLING, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 31: 941 (1988).
WATSON, E.B., DIFFUSION OF SM, SR, AND PB IN FLUORAPATITE, GEOCHIMICA ET COSMOCHIMICA ACTA 49: 1813 (1985).
WATSON, E.B., BEHAVIOR OF ALKALIS DURING DIFFUSIVE INTERACTION OF GRANITIC XENOLITHS WITH BASALTIC MAGMA, JOURNAL OF GEOLOGY 92: 121 (1984).
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Science
Volume 255 | Issue 5045
7 February 1992
7 February 1992
Copyright
1992 by the American Association for the Advancement of Science.
Submission history
Received: 11 October 1991
Accepted: 2 December 1991
Published in print: 7 February 1992
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