Ion microprobe analysis of graphite from ca. 3.8 Ga metasediments, Isua supracrustal belt, West Greenland: Relationship between metamorphism and carbon isotopic composition - Ueno, Yuichiro; Yurimoto, Hisayoshi; Yoshioka, Hideyoshi; Komiya, Tsuyoshi; Maruyama, Shigenori (Geochimica et Cosmochimica Acta, 2002)