Iridium anomaly but no shocked quartz from Late Archean microkrystite layer: Oceanic impact ejecta?

Geology

Volumn 26, Issue 3, 1998, Pages 195-198

  Simonson, Bruce M ^a   Davies, Darian ^a   Wallace, Malcolm ^b   Reeves, Shane ^b   Hassler, Scott W ^c  

^a OBERLIN COLLEGE   (United States)

^b UNIVERSITY OF MELBOURNE   (Australia)

^c CALIFORNIA STATE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

IRIDIUM; OCEAN CURRENTS; SILICATES; TEXTURES;

ENERGY WAVES; IMPACT EJECTA; IMPACT STRUCTURES; QUARTZ GRAINS; SHOCKED QUARTZ; SIDEROPHILE ELEMENTS; SILICATE MELTS; WESTERN AUSTRALIA;

QUARTZ;

ARCHEAN; DEPOSITIONAL ENVIRONMENT; EJECTA; IMPACT STRUCTURE; IRIDIUM; QUARTZ; SHOCK METAMORPHISM; SIDEROPHILE ELEMENT; SPHERULE; ARCHAEAN; IMPACT EJECTA; IRIDIUM ANOMALY; MICROKRYSTITE;

AUSTRALIA; HAMERSLEY RANGE; WESTERN AUSTRALIA;

EID: 0031818368     PISSN: 00917613     EISSN: None     Source Type: Journal    
DOI: 10.1130/0091-7613(1998)026<0195:IABNSQ>2.3.CO;2     Document Type: Article

References (35)

1. Anders, E., and Ebihara, M., 1982, Solar-system abundances of the elements: Geochimica et Cosmochimica Acta, v. 46, p. 2363-2380.
2. Basu, A., Young, S. W., Suttner, L. J., James, W. C., and Mack, G. H., 1975, Re-evaluation of the use of undulatory extinction and polycrystallinity in detrital quartz for provenance interpretation: Journal of Sedimentary Petrology, v. 45, p. 873-882.
3. Boulter, C. A., 1987, Subaqueous deposition of accretionary lapilli: Significance for palaeoenvironmental interpretations in Archaean greenstone belts: Precambrian Research, v. 34, p. 231-246.
4. Connor, A. G., and Meakins, A. L., 1989, Final report on Billygoat Core E46/129, Balfour Downs, Western Australia: Perth, Western Australia, CRA Exploration Report No. 15885, 6 p.
5. Gersonde, R., Kyte, F. T., Bleil, U., Diekmann, B., Flores, J. A., Gohl, K., Grahl, G., Hagen, R., Kuhn, G., Sierro, F. J., Volker, D., Abelmann, A., and Bostwick, J. A., 1997, Geological record and reconstruction of the late Pliocene impact of the Eltanin asteroid in the Southern Ocean: Nature: v. 390, p. 357-363.
6. Glass, B. P., and Burns, C. A., 1987, Late Eocene crystal-bearing spherules: Two layers or one?: Meteoritics, v. 22, p. 265-279.
7. Glass, B. P., and Burns, C. A., 1988, Microkrystites: A new term for impact-produced glassy spherules containing primary crystallites [abs.]: Proceedings Lunar and Planetary Science 18th, p. 455-458.
8. Gostin, V. A., Haines, P. W., Jenkins, R. J. F., Compston, W., and Williams, I. S., 1986, Impact ejecta horizon within Late Precambrian shales, Adelaide Geosyncline, South Australia: Science, v. 233, p. 198-200.
9. Gostin, V. A., Keays, R. R., and Wallace, M. W., 1989, Iridium anomaly from the Acraman impact ejecta horizon: Impacts can produce sedimentary iridium peaks: Nature, v. 340, p. 542-544.
10. Grieve, R. F., 1995, The record of terrestrial impact cratering: GSA Today, v. 5, p. 189, 194-196.
11. Grieve, R. F., Langenhorst, F., and Stöffler, D., 1996, Shock metamorphism of quartz in nature and experiment: II. Significance in geoscience: Meteoritics, v. 31, p. 6-35.
12. Hassler, S. W., 1993, Depositional history of the Main Tuff Interval of the Wittenoom Formation, Late Archean-Early Proterozoic Hamersley Group, Western Australia: Precambrian Research, v. 60, p. 337-359.
13. Hassler, S. W., Robey, H. F., Davies, D., and Simonson, B., 1996, Modeling of sedimentary bedforms produced by impact-induced tsunami in the ∼2.6 Hamersley Basin [abs.], Western Australia: Lunar and Planetary Science XXVII, p. 503-504.
14. Hoatson, D. M., and Keays, R. R., 1989, Formation of platiniferous sulfide horizons by crystal fractionation and magma mixing in the Munni layered intrusion. West Pilbara Block, Western Australia: Economic Geology, v. 84, p. 1775-1804.
15. John, C., and Glass, B. P., 1974, Clinopyroxene-bearing glass spherules associated with North American microtektites: Geology, v. 2, p. 599-602.
16. Koeberl, C., and Reimold, W. U., 1995, Early Archaean spherule beds in the Barberton Mountain Land, South Africa: No evidence for impact origin: Precambrian Research, v. 74, p. 1-33.
17. Margolis, S. V., Claeys, P., and Kyte, F. T., 1991, Microtektites, microkrystites, and spinels from a Late Pliocene asteroid impact in the southern ocean: Science, v. 251, p. 1594-1597.
18. Matter, A., and Ramseyer, K., 1985, Cathodoluminescence microscopy as a tool for provenance studies of sandstones, in Zuffa, G. G., ed., Provenance of arenites: Dordrecht, D. Reidel Publishing Company, p. 191-211.
19. Montanari, A., 1991, Authigenesis of impact spheroids in the K/T boundary clay from Italy: New constraints for high-resolution stratigraphy of terminal Cretaceous events: Journal of Sedimentary Petrology, v. 61, p. 315-339.
20. Nisbet, E. G., 1987, The Young Earth - An introduction to Archaean geology: Boston, Allen and Unwin, 402 p.
21. Owen, M. R., and Anders, M. H., 1988, Evidence from cathodoluminescence for non-volcanic origin of shocked quartz at the Cretaceous-Tertiary boundary: Nature, v. 334, p. 145-147.
22. Simonson, B. M., 1992, Geological evidence for a strewn field of impact spherules in the early Precambrian Hamersley Basin of Western Australia: Geological Society of America Bulletin, v. 104, p. 829-839.
23. Simonson, B. M., Beukes, N. J., and Hassler, S. W., 1997, Discovery of a Neoarchean impact spherule horizon in the Transvaal Supergroup of South Africa and possible correlations to the Hamersley Basin of Western Australia [abs.]: Lunar and Planetary Science XXVIII, p. 1323-1324.
24. Simonson, B. M., and Hassler, S. W., 1997, Revised correlations in the Early Precambrian Hamersley Basin based on a horizon of resedimented impact spherules: Australian Journal of Earth Sciences, v. 44, p. 37-48.
25. Simonson, B. M., and Jarvis, D. G., 1993, Microfabrics of oolites and pisolites in the early Precambrian Carawine Dolomite of Western Australia, in Rezak, R., and Lavoie, D., eds., Carbonate microfabrics: Heidelberg, Springer-Verlag, p. 227-237.
26. Simonson, B. M., Hassler, S. W., and Schubel, K. A., 1993a, Lithology and proposed revisions in stratigraphic nomenclature of the Wittenoom Formation (Dolomite) and overlying formations, Hamersley Group, Western Australia: Geological Survey of Western Australia Report 34, Professional Papers, p. 65-79.
27. Simonson, B. M., Schubel, K. A., and Hassler, S. W., 1993b, Carbonate sedimentology of the early Precambrian Hamersley Group of Western Australia: Precambrian Research, v. 60, p. 287-335.
28. Smit, J., Alvarez, W., Montanari, A., Swinburne, N., Van Kempen, T. M., Klaver, G. T., and Lustenhouwer, W. J., 1992, "Tektites" and microkrystites at the Cretaceous Tertiary boundary: Two strewn fields, one crater?: Proceedings Lunar and Planetary Science 22nd, p. 87-100.
29. Trendall, A. F., 1983, The Hamersley Basin, in Trendall, A. F., and Morris, R. C., eds., Iron-formations: Facts and problems: Amsterdam, Elsevier, p. 69-129.
30. Trendall, A. F., 1990, Hamersley Basin, in Geology and mineral resources of Western Australia: Geological Survey of Western Australia Memoir 3, p. 163-190.
31. Trendall, A. F., Nelson, D. R., de Laeter, J. R., and Hassler, S. W., 1998, Precise zircon U-Pb ages from the Marra Mamba Iron Formation and Wittenoom Formation, Hamersley Group, Western Australia: Australian Journal of Earth Sciences, v. 45 (in press).
32. Wallace, M. W., Gostin, V. A., and Keays, R. R., 1990a, Spherules and shard-like clasts from the Late Proterozoic Acraman impact ejecta horizon, South Australia: Meteoritics, v. 25, p. 161-165.
33. Wallace, M. W., Gostin, V. A., and Keays, R. R., 1990b, Acraman impact ejecta and host shales: Evidence for low-temperature mobilization of iridium and other platinoids: Geology, v. 18, p. 132-135.
34. Wallace, M. W., Gostin, V. A., and Keays, R. R., 1996, Sedimentology of the Neoproterozoic Acraman impact-ejecta horizon, South Australia: Australian Geological Survey Organization Journal of Australian Geology and Geophysics, v. 16, p. 443-451.
35. Woodhead, J. D., Hergt, J. M., and Simonson, B. M., 1998, Isotopic dating of an Archean bolide impact horizon, Hamersley Basin, Western Australia: Geology, v. 26, p. 47-50.