Selected Publications (all reviewed) Sugitani, K. (1992) Geochemical characteristics of Archean cherts and other sedimentary rocks in the Pilbara Block, Western Australia: evidence for Archean seawater enriched in hydrothermally-derived iron and silica. Precambrian Research 57, 21-47. Sugitani, K., Horiuchi, Y., Adachi, M., Sugisaki, R. (1996) Anomalously low Al2O3/TiO2 values for Archean cherts from the Pilbara Block, Western Australia–possible evidence for extensive chemical weathering on the early earth. Precambrian Research, 80, 49-76. Sugitani, K., Mimura, K. (1998) Redox change in sedimentary environments of Triassic bedded cherts, central Japan: possible reflection of sea-level change. Geological Magazine, 135, 735-753. Sugitani, K., Yamamoto, K., Wada, H., Binu-Lal, S.S., Yoneshige, M. (2002) Geochemistry of Archean carbonaceous cherts deposited at immature island-arc setting in the Pilbara Block, Western Australia. Sedimentary Geology, 151, 45-66. Sugitani, K., Mimura, K., Suzuki, K., Nagamine, K., Sugisaki, R. (2003) Stratigraphy and sedimentary petrology of an Archean volcanic–sedimentary succession at Mt. Goldsworthy in the Pilbara Block, Western Australia: implications of evaporite (nahcolite) and barite deposition. Precambrian Research, 120, 55-79. Takiguchi, T., Sugitani, K., Yamamoto, K., Suzuki, K. (2006) Biogeochemical signatures preserved in ancient siliceous sediments; new perspectives to Triassic radiolarian bedded chert compositions. Geochemical Journal, 40, 33-45. Sugitani, K., Yamashita, F., Nagaoka, T., Yamamoto, K., Minami, M., Mimura, K., Suzuki, K. (2006) Geochemistry and sedimentary petrology of Archean clastic sedimentary rocks at Mt. Goldsworthy, Pilbara Craton, Western Australia: Evidence for the early evolution of continental crust and hydrothermal alteration. Precambrian Research, 147, 124-147. Sugitani, K., Yamashita, F., Nagaoka, T., Minami, M., Yamamoto, K. (2006) Geochemistry of heavily altered Archean volcanic and volcaniclastic rocks of the Warrawoona Group, at Mt. Goldsworthy in the Pilbara Craton, Western Australia: Implications for alteration and origin. Geochemical Journal., 40, 523-535. Sugitani, K., Mimura, K., Allwood, A.C., Yamamoto, K. (2006) Rare earth element geochemistry of carbonaceous black chert of 3.4 Ga Strelley Pool Chert at Mt. Goldsworthy and Mt. Grant, Pilbara Craton: Implications for environment of deposition and habitat of microbes on early Earth. Geochimica Cosmochimica Acta, S70, A622 (proceedings). Sugitani, K., Grey, K., Allwood, A.C., Nagaoka, T., Mimura, K., Minami, M., Marshall, C.P., Van Kranendonk, M.J., Walter, M.R. (2007) Diverse microstructures from Archaean chert from the Mount Goldsworthy – Mount Grant area, Pilbara Craton, Western Australia: microfossil, dubiofossils, or pseudofossils? Precambrian Research 158, 228-262. Sugitani, K., Grey, K., Nagaoka, T., Mimura, K., 2009. Three-dimensional morphological and textural complexity of Archean putative microfossils from the northeastern Pilbara Craton: indications of biogenicity of large (> 15µm) spheroidal and spindle-like structures. Astrobiology 9, 603-615. Sugitani, K., Grey, K., Nagaoka, T., Mimura, K., Walter, M.R., 2009. Taxonomy and biogenicity of Archaean spheroidal microfossils (c. 3.0 Ga) from the Mount Goldsworthy-Mount Grant area in the northeastern Pilbara Craton, Western Australia. Precambrian Research 173, 50-59. Grey, K., Sugitani, K., 2009. Palynology of Archean microfossils (ca. 3.0 Ga) from the Mount Grant area, Pilbara Craton, Western Australia: further evidence of biogenicity. Precambrian Research 173, 60-69. Oehler, D.Z., Robert, F., Walter, M.R., Sugitani, K., Allwood, A., Meibom, A., Mostefaoui, S., Selo, M., Thomen, A., Gibson, E.K., 2009. NanoSIMS: insights to biogenicity and syngeneity of Archaean carbonaceous structures. Precambrian Research 173, 70-78. Sugahara, H., Sugitani, K., Mimura, K., Yamashita, F., Yamamoto, K., 2010. A systematic rare-earth elements and yttrium study of Archean cherts at the Mount Goldsworthy greenstone belt in the Pilbara Craton: Implications for the origin of microfossil-bearing black cherts. Precambrian Research 177, 73-87. Schopf, J.W., Kudryavtsev, A.B., Sugitani, K., Walter, M.R., 2010. Precambrian microbe-like pseudofossils: A promising solution to problem. Precambrian Research 179, 191-205. Oehler, D.Z., Robert, F., Walter, M.R., Sugitani, K., Meibom, A., Mostefaoui, S., Gibson, E.K., 2010. Diversity in the Archaean Biosphere: New Insights from NanoSIMS. Astrobiology 10, 413-424. Sugitani, K., Lept, K., Nagaoka,T., Mimura, K., Vankranendonk, M., Oehler, D.Z., Walter, M.R., 2010. Biogenicity of morphologically diverse carbonaceous microstructures from the ca. 3400 Ma Strelley Pool Formation, in the Pilbara Craton, Western Australia. Astrobiology10, 899-920. Sugitani, K., Mimura, K., Walter, M.R., 2011. Farrel Quartzite microfossils in the Goldsworthy greenstone belt, Pilbara Craton, Western Australia. Additional evidence for a diverse and evolved biota on the Archean Earth. In J. Seckbach and V. Tewari (Eds.) Cellular Origin, Life in Extreme Habitats and Astrobiology. Stromatolites: Interaction of Microbes with Sediments. p. 117-132, Springer, Dordrecht. Sugitani K. (2011) Early to Middle Archean microfossil records from the Pilbara Craton, Western Australia; its significance in the early evolution of life (in Japanese). Chikyukagaku (Geochemistry) 45, 265-279. Sugitani1 K., Mimura, K., Nagaoka, T., Lepot, K., Takeuchi, M. (2013) Microfossil assemblage from the 3400 Ma Strelley Pool Formation in the Pilbara Craton, Western Australia: Results form a new locality. Precambrian Research 226, 59-74. House, C.H., Oehler, D.Z., Sugitani, K., Mimura, K. (2013) Carbon isotopic analyses of ca. 3.0 Ga microstructures imply planktonic autotrophs inhabited Earth’s early oceans. Geology 41, 651-654. Lepot, K., Williford, K.H., Ushikubo, T., Sugitani, K., Mimura, K., Spicuzza, M.J., Valley, J.W. (2013) Texture-specific isotopic compositions in 3.4 Gyr old organic matter support selective preservation in cell-like structures. Geochimica et Cosmochimica Acta 112, 66-86. Sugitani, K., Mimura, K., Takeuchi, M., Lepot, K., Ito, S., Javaux, E.J. (in press) Early evolution of large micro-organisms with cytological complexity revealed by microanalyses of 3.4 Ga organic-walled microfossils. Geobiology Sugitani, K., Mimura, K., Takeuchi, M.,Yamaguchi, T., Suzuki, K., Senda, R., Asahara, Y., Wallis, S., Van Kranendonk, M.J. (in press) A Paleoarchean coastal hydrothermal field inhabited by diverse microbial communities: the Strelley Pool Formation, Pilbara Craton, Western Australia. Geobiology