20032555 Che Yao (Institute of Geomechanics, CSGS, Beijing); Hu Baolin The Microgoethite of Microorganism Origin in Rushui Reservoir and its Enrichment of Trace Elements (Acta Geoscientia Sinica, ISSN1006-3021, CN11-3474/P, 24(2), 2003, p. 161 - 166, 6 illus. , 3 tables, 10 refs. ) Key words:goethite minor elements Hubei Province