Contributions to Mineralogy and Petrology

, Volume 101, Issue 2, pp 198–206 | Cite as

Evidence for an Early Archean component in the Middle to Late Archean gneisses of the Wind River Range, west-central Wyoming: conventional and ion microprobe U-Pb data

  • John N. Aleinikoff
  • Ian S. Williams
  • William Compston
  • John S. Stuckless
  • Ronald G. Worl


Gneissic rocks that are basement to the Late Archean granites comprising much of the Wind River Range, west-central Wyoming, have been dated by the zircon U-Pb method using both conventional and ion microprobe techniques. A foliated hornblende granite gneiss member from the southern border of the Bridger batholith is 2670±13 Ma. Zircons from a granulite just north of the Bridger batholith are equant and faceted, a typical morphology for zircon grown under high grade metamorphic conditions. This granulite, which may be related to a second phase of migmatization in the area, is 2698±8 Ma. South of the Bridger batholith, zircons from a granulite (charnockite), which is related to an earlier phase of migmatization in the Range, yield a discordia with intercept ages of about 2.3 and 3.3 Ga. However, ion microprobe analyses of single zircon grains indicate that this rock contains several populations of zircon, ranging in age from 2.67 to about 3.8 Ga. Based on zircon morphology and regional geologic relationships, we interpret the data as indicating an age of ≃3.2 Ga for the first granulite metamorphism and migmatization. Older, possibly xenocrystic zircons give ages of ≃3.35, 3.65 and ≃3.8 Ga. Younger zircons grew at 2.7 and 2.85 Ga in response to events, including the second granulite metamorphism at 2.7 Ga, that culminated in the intrusion of the Bridger batholith and migmatization at 2.67 Ga. These data support the field and petrographic evidence for two granulite events and provide some temporal constraints for the formation of continental crust in the Early and Middle Archean in the Wyoming Province.


Zircon Continental Crust Granite Gneiss Single Zircon Gneissic Rock 
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  1. Baadsgaard H (1973) U-Th-Pb dates on zircons from the early Precambrian Amîtsoq gneisses, Godthaab district, West Greenland. Earth Planet Sci Lett 19:22–38CrossRefGoogle Scholar
  2. Baker CL (1946) Geology of the northwestern Wind River Mountains, Wyoming. Geol Soc Am Bull 57:565–596Google Scholar
  3. Barker F, Millard HT, Jr, Lipman PW (1979) Four low-K siliceous rocks of the western USA. In: Barker F (ed) Trondhjemites, dacites, and related rocks. Elsevier, Amsterdam, pp 415–433Google Scholar
  4. Bayley RW, Proctor PD, Condie KC (1973) Geology of the South Pass area, Fremont County, Wyoming. US Geol Surv Prof Paper 793:39Google Scholar
  5. Black LP, Gale NH, Moorbath S, Pankhurst RJ, McGregor VR (1971) Isotopic dating of very early Precambrian amphibolite facies gneisses from the Godthaab district, West Greenland. Earth Planet Sci Lett 12:245–259Google Scholar
  6. Black LP, Williams IS, Compston W (1986) Four zircon ages from one rock: the history of a 3930-Ma-old granulite from Mount Sones, Enderby Land, Antarctica. Contrib Mineral Petrol 94:427–437CrossRefGoogle Scholar
  7. Cliff RA (1985) Isotopic dating in metamorphic belts. J Geol Soc London 142:97–110Google Scholar
  8. Collerson KD (1983) Ion microprobe zircon geochronology of the Uivak gneisses: implications for the evolution of early terrestrial crust in the North Atlantic Craton. In: Ashwal LD, Card KD (eds) Workshop on a cross section of Archean crust, LPI Tech Rep 83–03. Lunar Planet Inst, Houston, pp 28–33Google Scholar
  9. Compston W, Kinny PD, Williams IS, Foster JJ (1986) The age and Pb loss behaviour of zircons from the Isua supracrustal belt as determined by ion microprobe. Earth Palnet Sci Lett 80:71–81Google Scholar
  10. Compston W, Pidgeon RT (1986) Jack Hills, evidence of more very old detrital zircons in Western Australia. Nature 321:766–769CrossRefGoogle Scholar
  11. Cumming GL, Richards JR (1975) Ore lead isotope ratios in a continuously changing earth. Earth Planet Sci Lett 28:155–171CrossRefGoogle Scholar
  12. Fischer LB, Stacey JS (1986) Uranium-lead zircon ages and common lead measurements for the Archean gneisses of the Granite Mountains, Wyoming. In: Peterman ZE, Schnabel DC (eds) Shorter contributions to isotope research. US Geol Surv Bull 1622:14–23Google Scholar
  13. Frost BR, Hulsebosch TP, Koesterer ME (1985) Multiple granulite metamorphic events in the Archean of the Wind River Mountains, Wyoming. Geol Soc Am Abst Progr 16:513Google Scholar
  14. Frost CD, Frost BR, Koesterer ME, Hulsebosch TP (1986) Development of Archean crust in the Wind River Mountains, Wyoming. In: Ashwal LD (ed) Workshop on early crustal genesis: the world's oldest rocks, LPI Tech Rep no 86–04. Lunar Planet Inst, Houston, pp 40–45Google Scholar
  15. Froude DO, Ireland TR, Kinny PD, Williams IS, Compston W, Williams IR, Myers JS (1983) Ion microprobe identification of 4,100–4,200-Myr-old terrestrial zircons. Nature 304:616–618CrossRefGoogle Scholar
  16. Goldich SS, Fischer LB (1986) Air-abrasion experiments in U-Pb dating of zircon. Chem Geol Iso Geo Sect 58:195–215Google Scholar
  17. Goldich SS, Mudrey MG (1972) Dilatancy model for discordant U-Pb ages. In: Tugarinov AI (ed) Contributions to recent geochemistry and analytical and analytical chemistry, Nauka Publ Office Moscow, pp 415–418Google Scholar
  18. Granger HC, McKay EJ, Mattick RE, Patton LL, MacIlroy P (1971) Mineral Resources of the Glacier Primitive Area, Wyoming. US Geol Surv Bull 1319-F:113Google Scholar
  19. Grauert B, Wagner ME (1975) Age of the granulite-facies metamorphism of the Wilmington complex, Delaware-Pennsylvania Piedmont. Am J Sci 275:683–691Google Scholar
  20. Kinny PD (1986) 3820 Ma zircons from a tonalitic Amitsoq gneiss in the Goth\(\dot a\)b district of southern West Greenland. Earth Planet Sci Lett 79:337–347CrossRefGoogle Scholar
  21. Koesterer ME, Frost CD, Frost BR, Hulsebosch TP, Bridgwater D, Worl RG (1987) Development of the Archean crust in the Medina Mountain area, Wind River Range, Wyoming. Precamb Res 37:287–304Google Scholar
  22. Krogh TE (1973) A low-contamination method for hydrothermal decomposition of zircon and extraction of U and Pb for isotopic age determinations. Geochim Cosmochim Acta 37:485–494CrossRefGoogle Scholar
  23. Link PK, Anderson IC, Hengesh JV, Worl RG (1985) Geologic map of the Horseshoe Lake quadrangle, Sublette county, Wyoming. US Geol Surv Open-file Rep 85-0449Google Scholar
  24. Ludwig KR (1980) Calculation of uncertainties of U-Pb isotope data. Earth Planet Sci Lett 46:212–220Google Scholar
  25. Mogk DW, Mueller PA (1987) Tectonic evolution of Archean basement in the Spanish Peaks area, northern Madison Range. Geol Soc Am Abst Progr 19:775Google Scholar
  26. Moorbath S, O'Nions RK, Pankhurst RJ, Gale NH, McGregor VR (1972) Further rubidium-strontium age determinations on the very early Precambrian rocks of the Godthaab district. West Greenland. Nature Phys Sci 240:78–82Google Scholar
  27. Mueller PA, Wooden JL, Odom AL, Bowes DR (1982) Geochemistry of the Archean rocks of the Quad Creek and Hellroaring Plateau areas of the eastern Beartooth Mountains. In : Mueller PA, Wooden JL (eds) Precambrian geology of the Beartooth Mountains, Montana and Wyoming. Montana Bur Mines Geol Spec Publ 84:69–82Google Scholar
  28. Naylor RS, Steiger RH, Wasserburg GJ (1970) U-Th-Pb and Rb-Sr systematics in 2700×106-year old plutons from the southern. Wind River Range, Wyoming. Geochim Cosmochim Acta 34:1133–1159CrossRefGoogle Scholar
  29. Pearson RC, Kiilsgaard TH, Patton LL (1971) Mineral resources of the Popo Agie Primitive area, Fremont and Sublette counties. Wyoming. US Geol Surv Bull 1353-B:55Google Scholar
  30. Peterman ZE (1979) Geochronology and the Archean of the United States. Econ 74:1544–1562Google Scholar
  31. Peterman ZE (1982) Geochronology of the southern Wyoming age province — a summary. 1982 Archean Geochemistry Field Conference Part I. Guide to Field Trips. Golden, Colo School Mines, pp 1–23Google Scholar
  32. Peterman ZE, Zartman RE, Sims PK (1986) A protracted Archean history in the Watersmeet gneiss dome, northern Michigan. In: Peterman ZE, Schnabel DC (eds) Shorter contributions to isotope research. US Geol Surv Bull 1622:51–64Google Scholar
  33. Shuster RD, Mueller PA, Erslev EE, Bowes DR (1987) Age and composition of the pre-Cherry Creek metamorphic complex of the southern Madison Range, southwestern Montana. Geol Soc Am Abst Progr 19:843Google Scholar
  34. Spall H (1971) Paleomagnetic and K-Ar age of mafic dikes from the Wind River Range, Wyoming. Geol Soc Am Bull 182:2457–2472Google Scholar
  35. Stuckless JS, Hedge CE, Worl RG, Simmons KR, Nkomo IT, Wenner DB (1985) Isotopic studies of the late Archean plutonic rocks of the Wind River Range, Wyoming. Geol Soc Am Bull 96:850–860CrossRefGoogle Scholar
  36. Williams IS, Kinny PD, Black LP, Compston W, Froude DO, Ireland TR (1985) Dating Archaean zircon by ion microprobe — new light on an old problem. In: Burke K, Ashwal LD (eds) Workshop on the early earth: the interval from accretion to the older Archaen, LPI Tech Rep 85–01, Lunar Planet Inst, Houston, pp 84–86Google Scholar
  37. Wooden JL, Mueller PA (1987) Pb isotopic evidence for Middle and Early Archean crust in the northern Wyoming Province. Geol Soc Am Abst Progr 19:896–897Google Scholar
  38. Wooden JL, Mueller PA, Hunt DK, Bowes DR (1982) Geochemistry and Rb-Sr geochronology of Archean rocks from the interior of the southeastern Beartooth Mountains, Montana and Wyoming. In: Mueller PA, Wooden JL (eds) Montana Bur Mines Geol Spec Publ 84:45–55Google Scholar
  39. Worl RG, Koesterer ME, Hulsebosch TP (1986) Geologic map of the Bridger Wilderness and Green-Sweetwater roadless area, Sublette and Fremont counties, Wyoming. US Geol Surv Map MF-1636-B: scale 1:250000Google Scholar

Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • John N. Aleinikoff
    • 1
  • Ian S. Williams
    • 2
  • William Compston
    • 2
  • John S. Stuckless
    • 1
  • Ronald G. Worl
    • 1
  1. 1.US Geological SurveyDenverUSA
  2. 2.Research School of Earth SciencesAustralian National UniversityCanberraAustralia

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