Iron isotope, major and trace element characterization of early Archean supracrustal rocks from SW Greenland: Protolith identification and metamorphic overprint

Geochimica et Cosmochimica Acta

Volumn 71, Issue 19, 2007, Pages 4745-4770

  Dauphas, Nicolas ^a,b   van Zuilen, Mark ^c   Busigny, Vincent ^a,b   Lepland, Aivo ^d   Wadhwa, Meenakshi ^e   Janney, Philip E ^e  

^a UNIVERSITY OF CHICAGO   (United States)

^b FIELD MUSEUM OF NATURAL HISTORY   (United States)

^c INSTITUT DE PHYSIQUE DU GLOBE DE PARIS   (France)

^d GEOLOGICAL SURVEY OF NORWAY   (Norway)

^e ARIZONA STATE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ARCHEAN; BANDED IRON FORMATION; ISOTOPIC COMPOSITION; METAMORPHISM; PROTOLITH; RARE EARTH ELEMENT; SUPRACRUSTAL ROCK; TRACE ELEMENT;

AKILIA; ARCTIC; GREENLAND; ISUA GREENSTONE BELT;

EID: 35248872900     PISSN: 00167037     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.gca.2007.07.019     Document Type: Article

References (130)

1. Ague J.J. Evidence for major mass transfer and volume strain during regional metamorphism of pelites. Geology 19 (1991) 855-858
2. Alibert C., and McCulloch M.T. Rare earth element and neodymium isotopic compositions of the banded iron-formations and associated shales from Hamersley, western Australia. Geochim. Cosmochim. Acta 57 (1993) 187-204
3. 2O): implication for iron stable isotope geochemistry. Geochim. Cosmochim. Acta 69 (2005) 825-837
4. Anders E., and Grevesse N. Abundances of the elements: meteoritic and solar. Geochim. Cosmochim. Acta 53 (1989) 197-214
5. André L., Cardinal D., Alleman L.Y., and Moorbath S. Silicon isotopes in ∼3.8 Ga West Greenland rocks as clues to the Eoarchaean supracrustal Si cycle. Earth Planet. Sci. Lett. 254 (2006) 162-173
6. Appel P.W.U. On the early Archaean Isua iron formation, West Greenland. Precambrian Res. 11 (1980) 73-87
7. Appel P.W.U. Rare earth elements in the early Archaean Isua iron-formation, West Greenland. Precambrian Res. 20 (1983) 243-258
8. Appel P.W.U., Fedo C.M., Moorbath S., and Myers J.S. Recognizable primary volcanic and sedimentary features in a low-strain domain of the highly deformed, oldest known (∼3.7-3.8 Gyr) Greenstone Belt, Isua, West Greenland. Terra Nova 10 (1998) 57-62
9. Archer C., and Vance D. Coupled Fe and S isotope evidence for Archean microbial Fe(III) and sulfate reduction. Geology 34 (2006) 153-156
10. Balci N., Bullen T.D., Witte-Lien K., Shanks W.C., Motelica M., and Mandernack K.W. Iron isotope fractionation during microbially stimulated Fe(II) oxidation and Fe(III) precipitation. Geochim. Cosmochim. Acta 70 (2006) 622-639
11. Bau M., and Möller P. Rare earth element systematics of the chemically precipitated component in Early Precambrian iron formations and the evolution of the terrestrial atmosphere-hydrosphere-lithosphere system. Geochim. Cosmochim. Acta 57 (1993) 2239-2249
12. Bau M. Controls on the fractionation of isovalent trace elements in magmatic and aqueous systems: evidence from Y/Ho Zr/Hf, and lanthanide tetrad effect. Contrib. Mineral. Petrol. 123 (1996) 323-333
13. Bau M., and Dulski P. Distribution of yttrium and rare-earth elements in the Penge and Kuruman iron-formations, Transvaal Supergroup, South Africa. Precambrian Res. 79 (1996) 37-55
14. Bau M. Scavenging of dissolved yttrium and rare earths by precipitating iron oxyhydroxide: experimental evidence for Ce oxidation Y-Ho fractionation and lanthanide tetrad effect. Geochim. Cosmochim. Acta 63 (1999) 67-77
15. Beard B.L., Johnson C.M., Cox L., Sun H., Nealson K.H., and Aguilar C. Iron isotope biosignatures. Science 285 (1999) 1889-1892
16. Beard B.L., Johnson C.M., von Damm K.L., and Poulson R.L. Iron isotope constraints on Fe cycling and mass balance in oxygenated Earth oceans. Geology 31 (2003) 629-632
17. Beard B.L., Johnson C.M., Skulan J.L., Nealson K.H., Cox L., and Sun H. Application of Fe isotopes to tracing the geochemical and biological cycling of Fe. Chem. Geol. 195 (2003) 87-117
18. Beard B.L., and Johnson C.M. Inter-mineral Fe isotope variations in mantle-derived rocks and implications for the Fe geochemical cycle. Geochim. Cosmochim. Acta 68 (2004) 4727-4743
19. Boak J.L., and Dymek R.F. Metamorphism of the ca. 3800 Ma supracrustal rocks at Isua, West Greenland: implications for early Archaean crustal evolution. Earth Planet. Sci. Lett. 59 (1982) 155-176
20. Bolhar R., Kamber B.S., Moorbath S., Fedo C.M., and Whitehouse M.J. Characterisation of early Archaean chemical sediments by trace element signatures. Earth Planet. Sci. Lett. 222 (2004) 43-60
21. Brantley S.L., Liermann L., and Bullen T.D. Fractionation of Fe isotopes by soil microbes and organic acids. Geology 29 (2001) 535-538
22. Brantley S.L., Liermann L.J., Guynn R.L., Anbar A., Icopini G.A., and Barling J. Fe isotopic fractionation during mineral dissolution with and without bacteria. Geochim. Cosmochim. Acta 68 (2004) 3189-3204
23. 2+-significance for banded iron formations. Nature 303 (1983) 163-164
24. Bullen T.D., White A.F., Childs C.W., Vivit D.V., and Schulz M.S. Demonstration of significant abiotic iron isotope fractionation. Geology 29 (2001) 699-702
25. Byrne R.H., and Kim K.-H. Rare earth element scavenging in seawater. Geochim. Cosmochim. Acta 54 (1990) 2645-2656
26. Byrne R.H., and Lee J.H. Comparative yttrium and rare earth element chemistries in seawater. Mar. Chem. 44 (1993) 121-130
27. Cates N.L., and Mojzsis S.J. Chemical and isotopic evidence for widespread Eoarchean metasedimentary enclaves in southern West Greenland. Geochim. Cosmochim. Acta 70 (2006) 4229-4257
28. Cates N.L., and Mojzsis S.J. Pre-3750 Ma supracrustal rocks from the Nuvvuagittuq supracrustal belt, northern Québec. Earth Planet. Sci. Lett. 255 (2007) 9-21
29. Cloud P. Banded iron-formation-a gradualist's dilemna. In: Trendall A.F., and Morris R.C. (Eds). Iron-Formation: Formation: Facts and Problems (1983), Elsevier, Amsterdam 401-416
30. Croal L.R., Johnson C.M., Beard B.L., and Newman D.K. Iron isotope fractionation by Fe(II)-oxidizing photoautotrophic bacteria. Geochim. Cosmochim. Acta 68 (2004) 1227-1242
31. Crosby H.A., Johnson C.M., Roden E.E., and Beard B.L. Coupled Fe(II)-Fe(III) electron and atom exchange as a mechanism for Fe isotope fractionation during dissimilatory iron oxide reduction. Environ. Sci. Technol. 39 (2005) 6698-6704
32. Crosby H.A., Roden E.E., Johnson C.M., and Beard B.L. The mechanisms of iron isotope fractionation produced during dissimilatory Fe(III) reduction by Shewanella putrefaciens and Geobacter sulfurreducens. Geobiology 5 (2007) 169-189
33. Danielson A., Möller P., and Dulski P. The europium anomalies in banded iron formations and the thermal history of the oceanic crust. Chem. Geol. 97 (1992) 89-100
34. Dauphas N., van Zuilen M., Wadhwa M., Davis A.M., Marty B., and Janney P.E. Clues from Fe isotope variations on the origin of early archean BIFs from Greenland. Science 306 (2004) 2077-2080
35. Dauphas N., Janney P.E., Mendybaev R.A., Wadhwa M., Richter F.M., Davis A.M., van Zuilen M., Hines R., and Foley C.N. Chromatographic separation and multicollection-ICPMS analysis of iron. Investigating mass-dependent and -independent isotope effects. Anal. Chem. 76 (2004) 5855-5863
36. Dauphas N., and Rouxel O. Mass spectrometry and natural variations of iron isotopes. Mass Spectrom. Rev. 25 (2006) 515-550 Erratum 25, 831-832
37. Dauphas N., Cates N.L., Mojzsis S.J., and Busigny V. Identification of chemical sedimentary protoliths using iron isotopes in the >3750 Ma Nuvvuagittuq supracrustal belt, Canada. Earth Planet. Sci. Lett. 254 (2007) 358-376
38. David J., Parent M., Stevenson R., Nadeau P. and Godin L. (2002) La sequence supracrustale de Porpoise Cove, region d'Inukjuak: un exemple unique de croûte paléo-archéenne (ca. 3.8 Ga) dans la Province du Supérieur, in L'exploration minérale au Québec, notre savoir, vos découvertes, Ministère des Ressources Naturelles, Québec, DV 2002-10, p. 17.
39. Derry L.A., and Jacobsen S.B. The chemical evolution of Precambrian seawater: evidence from REEs in banded iron formations. Geochim. Cosmochim. Acta 54 (1990) 2965-2977
40. 54Fe double spike. Geochim. Cosmochim. Acta 70 (2006) 118-132
41. Dimroth E. The oldest rocks on Earth: stratigraphy and sedimentology of the 3.8 billion years old Isua supracrustal sequence. In: Sidorenko A.V. (Ed). Sedimentary Geology of the Highly Metamorphosed Precambrian Complexes (1982), Nauka, Moscow
42. Dymek R.F., and Klein C. Chemistry, petrology and origin of banded iron-formation lithologies from the 3800 Ma Isua Supracrustal Belt, West Greenland. Precambrian Res. 39 (1988) 247-302
43. Elderfield H. The oceanic chemistry of rare-earth elements. Phil. Trans. R. Soc. Lond. A 325 (1988) 105-126
44. Fedo C.M. Setting and origin for problematic rocks from the >3.7 Ga Isua Greenstone Belt, southern west Greenland: Earth's oldest coarse clastic sediments. Precambrian Res. 101 (2000) 69-78
45. Fedo C.M., Myers J.S., and Appel P.W.U. Depositional setting and paleogeographic implications of Earth's oldest supracrustal rocks, the >3.7 Ga Isua Greenstone belt, West Greenland. Sediment. Geol. 141 (2001) 61-77
46. Fedo C.M., and Whitehouse M.J. Metasomatic origin of quartz-pyroxene rock, Akilia, Greenland and implications for Earth's earliest life. Science 296 (2002) 1448-1452
47. Fedo C.M., and Whitehouse M.J. Origin and significance of Archean quartzose rocks at Akilia, Greenland-response. Science 298 (2002) 917a
48. Fedo C.M., and Whitehouse M.J. The origin of a most contentious rock-response. Science 298 (2002) 961-962
49. Fedo C.M., Whitehouse M.J., and Kamber B.S. Geological constraints on detecting the earliest life on Earth: a perspective from the Early Archaean (older than 3.7 Gyr) of southwest Greenland. Phil. Trans. R. Soc. (Lond.) B 361 (2006) 851-867
50. Frei R., Bridgwater D., Rosing M., and Stecher O. Controversial Pb-Pb and Sm-Nd isotope results in the early Archaean Isua (west Greenland) oxide iron formation: preservation of primary signatures versus secondary disturbances. Geochim. Cosmochim. Acta 63 (1999) 473-488
51. Frei R., and Rosing M.T. The least terrestrial leads; implications for the early Archaean crustal evolution and hydrothermal-metasomatic processes in the Isua supracrustal belt (west Greenland). Chem. Geol. 181 (2001) 47-66
52. Frei R., and Jensen B.K. Re-Os, Sm-Nd isotope and REE systematics on ultramafic rocks and pillow basalts from the Earth's oldest oceanic crustal fragments (Isua Supracrustal Belt and Ujaragssuit nunât area, W. Greenland). Chem. Geol. 196 (2003) 163-191
53. Frei R., and Polat A. Source heterogeneity for the major components of ∼3.7 Ga banded iron formations (Isua Greenstone Belt, Western Greenland): tracing the nature of interacting water masses in BIF formation. Earth Planet. Sci. Lett. 253 (2007) 266-281
54. Friend C.R.L., Nutman A.P., and Bennett V.C. Origin and significance of Archean quartzose rocks at Akilia, Greenland-comment. Science 298 (2002) 917a
55. Frost C.D., von Blanckenburg F., Schoenberg R., Frost B.R., and Swapp S.M. Preservation of Fe isotope heterogeneities during diagenesis and metamorphism of banded iron formation. Contrib. Mineral. Petrol. 153 (2007) 211-235
56. Furnes H., de Wit M., Staudigel H., Rosing M., and Muehlenbachs K. A vestige of Earth's oldest ophiolite. Science 315 (2007) 1704-1707
57. Govindaraju K. 1994 compilation of working values and sample description for 383 geostandards. Geostandard. Newslett. 18 (1994) 1-158
58. Grau G., Rosing M., Bridgwater D., and Gill R.C.O. Resetting of Sm-Nd systematics during metamorphism of >3.7 Ga rocks: implications for isotopic models of early earth differentiation. Chem. Geol. 133 (1996) 225-240
59. Griffin W.L., McGregor V.R., Nutman A., Taylor P.N., and Bridgwater D. Early Archeaean granulite-facies metamorphism south of Ameralik, West Greenland. Earth Planet. Sci. Lett. 50 (1980) 59-74
60. Icopini G.A., Anbar A.D., Ruebush S.S., Tien M., and Brantley S.L. Iron isotope fractionation during microbial reduction of iron: the importance of adsorption. Geology 32 (2004) 205-208
61. Jacobsen S.B., and Pimentel-Klose M.R. A Nd isotopic study of the Hamersley and Michipicoten banded iron formations: the source of REE and Fe in Archean oceans. Earth Planet. Sci. Lett. 87 (1988) 29-44
62. Jochum K.P., Seufert H.M., Spettel B., and Pal me H. The solar system abundances of Nb, Ta, and Y, and the relative abundances of refractory lithophile elements in differentiated planetary bodies. Geochim. Cosmochim. Acta 50 (1986) 1173-1183
63. Jochum K.P., McDonough W.F., Palme H., and Spettel B. Compositional constraints on the continental lithospheric mantle from trace elements in spinel peridotite xenoliths. Nature 340 (1989) 548-550
64. Johnson C.M., Beard B.L., Beukes N.J., Klein C., and O'Leary J.M. Ancient geochemical cycling in the Earth as inferred from Fe isotope studies of banded iron formations from the Transvaal Craton. Contrib. Mineral. Petrol. 144 (2003) 523-547
65. Johnson C.M., Roden E.E., Welch S.A., and Beard B.L. Experimental constraints on Fe isotope fractionation during magnetite and Fe carbonate formation coupled to dissimilatory hydrous ferric oxide reduction. Geochim. Cosmochim. Acta 69 (2005) 963-993
66. Kasting J.F. Theoretical constraints on oxygen and carbon dioxide concentrations in the Precambrian atmosphere. Precambrian Res. 34 (1987) 205-229
67. Komiya T., Maruyama S., Masuda T., Nohda S., Hayashi M., and Okamoto K. Plate tectonics at 3.8-3.7 Ga: field evidence from the Isua accretionary complex, southern West Greenland. J. Geol. 107 (1999) 515-554
68. Komiya T., Maruyama S., Hirata T., Yurimoto H., and Nohda S. Geochemistry of the oldest MORB and OIB in the Isua Supracrustal Belt, southern West Greenland: implications for the composition and temperature of early Archean upper mantle. The Island Arc 13 (2004) 47-72
69. Lepland A., Arrhenius G., and Cornell D. Apatite in early Archean Isua supracrustal rocks, southern West Greenland: its origin, association with graphite and potential as a biomarker. Precambrian Res. 118 (2002) 221-241
70. Lovley D.R. Dissimilatory Fe(III) and Mn(IV) reduction. Microbiol. Rev. 55 (1991) 259-287
71. Manning C.E., Mojzsis S.J., and Harrison T.M. Geology, age and origin of supracrustal rocks at Akilia, West Greenland. Am. J. Sci. 306 (2006) 303-366
72. Markl G., von Blanckenburg F., and Wagner T. Iron isotope fractionation during hydrothermal ore deposition and alteration. Geochim. Cosmochim. Acta 70 (2006) 3011-3030
73. McDonough W.F., and Sun S.-S. The composition of the Earth. Chem. Geol. 120 (1995) 223-253
74. McGregor V.R., and Mason B. Petrogenesis and geochemistry of metabasaltic and metasedimentary enclaves in the Ami{dotless}̂tsoq gneisses, West Greenland. Am. Mineral. 62 (1977) 887-904
75. Mojzsis S.J., Arrhenius G., McKeegan K.D., Harrison T.M., Nutman A.P., and Friend C.R.L. Evidence for life on Earth before 3800 million years ago. Nature 384 (1996) 55-59
76. Mojzsis S.J., and Harrison T.M. Origin and significance of Archean quartzose rocks at Akilia, Greenland-comment. Science 298 (2002) 917a
77. Mojzsis S.J., Coath C.D., Greenwood J.P., McKeegan K.D., and Harrison T.M. Mass-independent isotope effects in Archean (2.5 to 3.8 Ga) sedimentary sulfides determined by ion microprobe analysis. Geochim. Cosmochim. Acta 67 (2003) 1635-1658
78. Moorbath S., O'Nions R.K., and Pankhurst R.J. Early Archaean age of the Isua iron formation, West Greenland. Nature 245 (1973) 138-139
79. Myers J.S., and Crowley J.L. Vestiges of life in the oldest Greenland rocks? A review of early Archaean geology in the Godthaabsfjord region, and reappraisal of field evidence for >3850 Ma life on Akilia. Precambrian Res. 103 (2000) 101-124
80. Myers J.S. Protoliths of the 3.8-3.7 Ga Isua greenstone belt, West Greenland. Precambrian Res. 105 (2001) 129-141
81. Nozaki Y., Zhang Y.S., and Amakawa H. The fractionation between Y and Ho in the marine environment. Earth Planet. Sci. Lett. 148 (1997) 329-340
82. Nutman A.P., Allaart J.H., Bridgwater D., Dimroth E., and Rosing M.T. Stratigraphic and geochemical evidence for the depositional environment of the early Archaean Isua supracrustal belt, southern West Greenland. Precambrian Res. 25 (1984) 365-396
83. Nutman A.P. The early Archaean to Proterozoic history of the Isuakasia area, southern West Greenland. Geol. Survey Greenland Bull. (1986) 154
84. Nutman A.P., Fryer B., and Bridgwater D. The early Archaean Nulliak (supracrustal) assemblage, northern Labrador. Can. J. Earth Sci. 26 (1989) 2159-2168
85. Nutman A.P., McGregor V.R., Friend C.R.L., Bennett V.C., and Kinny P.D. The Itsaq Gneiss Complex of southern West Greenland; the world's most extensive record of early crustal evolution (3900-3600 Ma). Precambrian Res. 78 (1996) 1-39
86. Nutman A.P., Mojzsis S.J., and Friend C.R.L. Recognition of ≥3850 Ma water-lain sediments in West Greenland and their significance for the early Archaean Earth. Geochim. Cosmochim. Acta 61 (1997) 2475-2484
87. Nutman A.P., Friend C.R.L., Bennett V.C., and McGregor V.R. The early Archaean Itsaq Gneiss Complex of southern West Greenland: the importance of field observations in interpreting age and isotopic constraints for early terrestrial evolution. Geochim. Cosmochim. Acta 64 (2000) 3035-3060
88. Nutman A.P., Friend C.R.L., and Bennett V.C. Evidence for 3650-3600 Ma assembly of the northern end of the Itsaq Gneiss Complex, Greenland: implication for early Archaean tectonics. Tectonics 21 (2002) 10.1029/2000TC001203
89. Nutman A.P., McGregor V.R., Shiraishi K., Friend C.R.L., Bennett V.C., and Kinny P.D. >3850 Ma BIF and mafic inclusions in the early Archaean Itsaq Gneiss Complex around Akilia, southern West Greenland? The difficulties of precise dating of zircon-free protoliths in migmatites. Precambrian Res. 117 (2002) 185-224
90. Nutman A.P., and Friend C.R.L. Petrography and geochemistry of apatites in banded iron formation, Akilia, W. Greenland: consequences for oldest life evidence. Precambrian Res. 147 (2006) 100-106
91. O'Hara K., and Blackburn W.H. Volume-loss model for trace-element enrichments in mylonites. Geology 17 (1989) 524-527
92. 2-rich atmosphere before ∼1.8 billion years ago. Nature 429 (2004) 395-399
93. 2 greenhouse to compensate for reduced solar luminosity on early Earth. Nature 277 (1979) 640-642
94. Pack A., Russell S.S., Shelley J.M.G., and van Zuilen M. Geo- and cosmochemistry of the twin elements yttrium and holmium. Geochim. Cosmochim. Acta. 71 (2007) 4592-4608
95. Palin J.M. The origin of a most contentious rock-comment. Science 298 (2002) 961
96. Perry E.C., and Ahmad S.N. Carbon isotope composition of graphite and carbonate minerals from 3.8-AE metamorphosed sediments, Isukasia, Greenland. Earth Planet. Sci. Lett. 36 (1977) 280-284
97. Piepgras D.J., Wasserburg G.J., and Dasch E.J. The isotopic composition of Nd in different ocean masses. Earth Planet. Sci. Lett. 45 (1979) 223-236
98. Polat A., Hofmann A.W., and Rosing M.T. Boninite-like volcanic rocks in the 3.7-3.8 Ga Isua greenstone belt, West Greenland: geochemical evidence for intra-oceanic subduction zone processes in the early Earth. Chem. Geol. 184 (2002) 231-254
99. Polat A., and Hofmann A.W. Alteration and geochemical patterns in the 3.7-3.8 Ga Isua greenstone belt, West Greenland. Precambrian Res. 126 (2003) 197-218
100. Polyakov V.B., and Mineev S.D. The use of Mössbauer spectroscopy in stable isotope geochemistry. Geochim. Cosmochim. Acta 64 (2000) 849-865
101. Polyakov V.B., Clayton R.N., Horita J., and Mineev S.D. Equilibrium iron isotope fractionation factors of minerals: Reevaluation from the data of nuclear inelastic resonant X-ray scattering and Mössbauer spectroscopy. Geochim. Cosmochim. Acta. 71 (2007) 3833-3846
102. Quinn K.A., Byrne R.H., and Schijf J. Comparative scavenging of Yttrium and the rare earth elements in seawater: competitive influences of solution and surface chemistry. Aquat. Geochem. 10 (2004) 59-80
103. Rollinson H. (2002) The metamorphic history of the Isua Greenstone Belt, West Greenland. In The Early Earth: Physical, Chemical and Biological Development (eds. C. M. R. Fowler, C. J. Ebinger and C. J. Hawkesworth). Geological Society, Special Publications, London, 199, pp. 329-350.
104. Rollinson H. Garnet growth chronologies indicate a complex metamorphic history for the Isua Greenstone Belt. Precambrian Res. 126 (2003) 181-196
105. Rose N.M., Rosing M.T., and Bridgwater D. The origin of metacarbonate rocks in the Archean Isua Supracrustal Belt, West Greenland. Am. J. Sci. 296 (1996) 1004-1044
106. Rosing M.T., Rose N.M., Bridgwater D., and Thomsen H.S. Earliest part of Earth's stratigraphic record: a reappraisal of the >3.7 Ga Isua (Greenland) supracrustal sequence. Geology 24 (1996) 43-46
107. 13C-Depleted carbon microparticles in >3700-Ma sea-floor sedimentary rocks from West Greenland. Science 283 (1999) 674-676
108. Rouxel O., Dobbek N., Ludden J., and Fouquet Y. Iron isotope fractionation during oceanic crust alteration. Chem. Geol. 202 (2003) 155-182
109. Rouxel O.J., Bekker A., and Edwards K. Iron isotope constraints on the Archean and Paleoproterozoic ocean redox state. Science 307 (2005) 1088-1091
110. Rouxel O.J., Bekker A., and Edwards K.J. Response to comment on Iron isotope constraints on the Archean and Paleoproterozoic ocean redox state. Science 311 (2006) 177b
111. Rye R., Kuo P.H., and Holland H.D. Atmospheric carbon dioxide concentrations before 2.2 billion years ago. Nature 378 (1995) 603-605
112. Schidlowski M., Appel P.W.U., Eichmann R., and Junge C.E. Carbon isotope geochemistry of the 3.7 × 109-yr-old Isua sediments, West Greenland: implications for the Archaean carbon and oxygen cycles. Geochim. Cosmochim. Acta 43 (1979) 189-199
113. Schiøtte L., Compston W., and Bridgwater D. U-Th-Pb ages of single zircons in Archaean supracrustals from the Nain Province, Labrador, Canada. Can. J. Earth Sci. 26 (1989) 2636-2644
114. Severmann S., Johnson C.M., Beard B.L., German C.R., Edmonds H.N., Chiba H., and Green D.R.H. The effect of plume processes on the Fe isotope composition of hydrothermally derived Fe in the deep ocean as inferred from the Rainbow vent site, Mid-Atlantic Ridge, 36°14′N. Earth Planet. Sci. Lett. 225 (2004) 63-76
115. Severmann S., Johnson C.M., Beard B.L., and McManus J. The effect of early diagenesis on the Fe isotope compositions of porewaters and authigenic minerals in continental margin sediments. Geochim. Cosmochim. Acta 70 (2006) 2006-2022
116. Sharma M., Polizzotto M., and Anbar A.D. Iron isotopes in hot springs along the Juan de Fuca Ridge. Earth Planet. Sci. Lett. 194 (2001) 39-51
117. Shimizu H., Umemoto N., Masuda A., and Appel P.W.U. Sources of iron-formation in the Archean Isua and Malene supracrustals, West Greenland: evidence from La-Ce and Sm-Nd isotopic data and REE abundances. Geochim. Cosmochim. Acta 54 (1990) 1147-1154
118. Skulan J.L., Beard B.L., and Johnson C.M. Kinetic and equilibrium Fe isotope fractionation between aqueous Fe(III) and hematite. Geochim. Cosmochim. Acta 66 (2002) 2995-3015
119. Staubwasser M., von Blanckenburg F., and Schoenberg R. Iron isotopes in the early marine diagenetic iron cycle. Geology 34 (2006) 629-632
120. Tamura H., Goto K., and Nagayama M. The effect of ferric hydroxide on the oxygenation of ferrous ions in neutral solutions. Corros. Sci. 16 (1976) 197-207
121. Taylor P.D.P., Maeck R., and De Bièvre P. Determination of the absolute isotopic composition and atomic weight of a reference sample of natural iron. Int. J. Mass Spectrom. Ion Process. 121 (1992) 111-125
122. van Zuilen M.A., Lepland A., and Arrhenius G. Reassessing the evidence for the earliest traces of life. Nature 418 (2002) 627-630
123. van Zuilen M.A., Lepland A., Teranes J., Finarelli J., Wahlen M., and Arrhenius G. Graphite and carbonates in the 3.8 Ga old Isua Supracrustal Belt, southern West Greenland. Precambrian Res. 126 (2003) 331-348
124. van Zuilen M.A., Mathew K., Wopenka B., Lepland A., Marti K., and Arrhenius A. Nitrogen and argon isotopic signatures in graphite from the 3.8-Ga-old Isua Supracrustal Belt, southern West Greenland. Geochim. Cosmochim. Acta 69 (2005) 1241-1252
125. Welch S.A., Beard B.L., Johnson C.M., and Braterman P.S. Kinetic and equilibrium Fe isotope fractionation between aqueous Fe(II) and Fe(III). Geochim. Cosmochim. Acta 67 (2003) 4231-4250
126. Whitehouse M.J., Kamber B.S., and Moorbath S. Age significance of U-Th-Pb zircon data from early Archaean rocks of west Greenland-a reassessment based on combined ion-microprobe and imaging studies. Chem. Geol. 160 (1999) 201-224
127. Whitehouse M.J., Kamber B.S., Fedo C.M., and Lepland A. Integrated Pb- and S-isotope investigation of sulphide minerals from the early Archaean of southwest Greenland. Chem. Geol. 222 (2005) 112-131
128. Widdel F., Schnell S., Heising S., Ehrenreich A., Assmus B., and Schink B. Ferrous iron oxidation by anoxygenic phototrophic bacteria. Nature 362 (1993) 834-836
129. Yamaguchi K.E., and Ohmoto H. Comment on Iron isotope constraints on the Archean and Paleoproterozoic ocean redox state. Science 311 (2006) 177a
130. Zhang J., Amakawa H., and Nozaki Y. The comparative behaviors of Yttrium and Lanthanides in the seawater of the North Pacific. Geophys. Res. Lett. 21 (1994) 2677-2680