T J Lin, H C Ver Eecke, E A Breves, M D Dyar, J W Jamieson, M D Hannington, H Dahle, J L Bishop, M D Lane, D A Butterfield, D S Kelley, M D Lilley, J A Baross, J F Holden
Rock and fluid samples were collected from three hydrothermal chimneys at the Endeavour Segment, Juan de Fuca Ridge to evaluate linkages among mineralogy, fluid chemistry, and microbial community composition within the chimneys. Mössbauer, midinfrared thermal emission, and visible-near infrared spectroscopies were utilized for the first time to characterize vent mineralogy, in addition to thin-section petrography, X-ray diffraction, and elemental analyses. A 282°C venting chimney from the Bastille edifice was composed primarily of sulfide minerals such as chalcopyrite, marcasite, and sphalerite...
February 2016: Geochemistry, Geophysics, Geosystems: G³