High-temperature memory in calcic amphiboles and constraints on compositional control of their 40Ar/39Ar ages

Geology

Volumn 26, Issue 1, 1998, Pages 31-34

  Siebel, Wolfgang ^a   Henjes Kunst, Friedhelm ^b   Rhede, Dieter ^a  

^a GFZ GERMAN RESEARCH CENTRE FOR GEOSCIENCES   (Germany)

^b FEDERAL INSTITUTE FOR GEOSCIENCES AND NATURAL RESOURCES BGR   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

SCANNING ELECTRON MICROSCOPY; SILICATE MINERALS;

CALCIC AMPHIBOLE; COMPOSITIONAL CONTROL; HEATING EXPERIMENT; HIGH TEMPERATURE; HIGHEST TEMPERATURE; MEDIUM TEMPERATURE; SCANNING ELECTRONS; THERMAL EVENTS;

ARGON;

AMPHIBOLE; ARGON-ARGON DATING; GRANITE; HERCYNITE; HIGH TEMPERATURE; HORNBLENDE; ARGON/ARGON DATING; GEOCHRONOLOGY; THERMAL MEMORY;

EID: 0031961099     PISSN: 00917613     EISSN: None     Source Type: Journal    
DOI: 10.1130/0091-7613(1998)026<0031:HTMICA>2.3.CO;2     Document Type: Article

References (19)

1. 40Ar in metamorphic hornblende: Contributions to Mineralogy and Petrology, v. 105, p. 691-703.
2. Cosca, M. A., and O'Nions, R. K., 1994, A reexamination of the influence of composition on argon retentivity in metamorphic calcic amphiboles: Chemical Geology, v. 112, p. 39-56.
3. Dahl, P. S., 1996, The effects of composition on retentivity of argon and oxygen in hornblende and related amphiboles: A field-tested empirical model: Geochimica et Cosmochimica Acta, v. 60, p. 3687-3700.
4. 39Ar vacuum heating: Geochimica et Cosmochimica Acta, v. 52, p. 2457-2465.
5. 40Ar in hornblende: Contributions to Mineralogy and Petrology, v. 78, p. 324-331.
6. Holl, P. K., von Drach, V., Müller-Sohnius, D., and Köhler, H., 1989, Caledonian ages in Variscan rocks: Rb-Sr and Sm-Nd isotope variations in dioritic intrusives from the northwestern Bohemian massif, West Germany: Tectonophysics, v. 157, p. 179-194.
7. Köhler, H., and Hölzl, S., 1996, The age of the Leuchtenberg granite (NE Bavaria, Germany): A revision on account of new U-Pb zircon ages: Neues Jahrbuch für Mineralogie Monatshefte, v. 1996, no. 5, p. 212-222.
8. Leake, B. E., Elias, E. M., and Farrow, C. M., 1988, The relationship of argon retentivity and chemical composition of hornblende: Geochimica et Cosmochimica Acta, v. 52, p. 2165.
9. Lee, J. K. W., 1993, The argon release mechanisms of hornblende in vacuo: Chemical Geology, v. 106, p. 133-170.
10. 39Ar geochronology and the interpretation of thermal histories: Geology, v. 19, p. 872-876.
11. 39Ar ages for terrestrial rocks: Barberton Mountain komatiites: Nature, v. 307, p. 352-354.
12. O'Nions, R. K., Smith, D. G. W., Baadsgaard, H., and Motion, R. D., 1969, Influence of chemical composition on argon retentivity in metamorphic calcic amphiboles from south Norway: Earth and Planetary Science Letters, v. 5, p. 339-345.
13. Onstott, T. C., and Peacock, M. W., 1987, Argon retentivity of hornblende. A field experiment in a slowly cooled metamorphic terrane: Geochimica et Cosmochimica Acta, v. 51, p. 2891-2903.
14. Onstott, T. C., and Pringle-Goodell, L., 1988, The influence of microstructures on the relationship between argon retentivity and chemical composition of hornblende: Geochimica et Cosmochimica Acta, v. 52, p. 2167-2168.
15. Siebel, W., 1995, Anticorrelated Rb-Sr and K-Ar age discordances, Leuchtenberg granite, NE Bavaria, Germany: Contributions to Mineralogy and Petrology, v. 120, p. 197-211.
16. Siebel, W., Wendt, I., and Höhndorf, A., 1995, Origin of late Variscan granitoids from NE Bavaria, Germany, exemplified by REE and Nd isotope systematics: Chemical Geology, v. 125, p. 249-270.
17. Siebel, W., Trzebski, R., Stettner, G., Hecht, L., Casten, U., Höhndorf, A., and Müller, P., 1997, Granitoid magmatism of the NW Bohemian massif revealed: Gravity data, composition, age relations and phase concept: Geologische Rundschau, v. 86, p. S45-S63.
18. Troll, G., 1968, Gliederung der redwitzitischen Gesteine Bayerns nach Stoff- und Gefügemerkmalen. Teil I: Die Typlokalität von Marktredwitz in Oberfranken: Bayerische Akademie der Wissenschaften Abhandlungen, v. 133, p. 1-86.
19. Wartho, J., Dodson, M. H., Rex, D. C., and Guise, P. G., 1991, Mechanisms of Ar release from Himalayan metamorphic hornblende: American Mineralogist, v. 76, p. 1446-1448.