| subsurface microbial diversity in deep-granitic-fracture water in colorado. | a microbial community analysis using 16s rrna gene sequencing was performed on borehole water and a granite rock core from henderson mine, a >1,000-meter-deep molybdenum mine near empire, co. chemical analysis of borehole water at two separate depths (1,044 m and 1,004 m below the mine entrance) suggests that a sharp chemical gradient exists, likely from the mixing of two distinct subsurface fluids, one metal rich and one relatively dilute; this has created unique niches for microorganisms. the ... | 2008 | 17981950 |