Investigator’s Annual Reports (IAR’s) for Crater Lake National Park
Magma migration and Hydrothermal Convection in High Cascade volcanoes
Report Number: 12845
Permit Number: CRLA199902-003
Current Status: Checked in
Date Received: Jan 01, 1999
Reporting Year: 1998
Principal Investigator: Michael Ryan, U.S. Geological Survey, Reston, VA
Park-assigned Study Id. #: CRLA199902-003
Permit Expiration Date: Jan 01, 2000
Permit Start Date: Jan 01, 1998
Study Starting Date: Jan 01, 1996
Study Ending Date: Jan 01, 2006
Study Status: Completed
Activity Type: Research
Subject/Discipline: Geothermal / Volcanology
Objectives: Determination of the transport mechanisms and the three-dimensional structure of thermophilic and hyperthermophilic microbial communities. The work is done in relationship to the spatial structure(s) of the thermal intervals and isotherms of their optimal temperature range and limiting temperatures.
Findings and Status: Galerkin-based finite-element numerical simulations have been completed for the determination of the flow velocity vectors and the thermal structure of theoretical end-member microbial transport scenarios. These include: (I) Continuous convective transport of microbes in fractured and microporous volcanic rock; (II) Continuous convective transport in multiply- fractured volcanic rock.;These simulations have produced maps of two-dimensional slices through the subsurface of fractured volcanic substructures appropriate to the deep structure of Yellowstone’s fracture-controlled hydrothermal conduits. In cross-section the simulations depict the time-space evolution of the regions of stability for (i) thermophilic microbes (50-80 C); (ii) hyperthermophilic microbes (80-113 C); and selected macromolecules (114-~200 C).; Manuscripts for Journal publication reporting these, and other, general findings are now in preparation.
For this study, were one or more specimens collected and removed from the park but not destroyed during analyses? No
Funding provided this reporting year by NPS: 0
Funding provided this reporting year by other sources: 0
Full name of college or university: n/a
Annual funding provided by NPS to university or college this reporting year: 0
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