| Title | A New Geothermal Study in Underwater Boreholes on Lake Baikal (Continental Rift Zone) |
|---|---|
| Authors | Raissa P. Dorofeeva and Albert D. Duchkov |
| Year | 1995 |
| Conference | World Geothermal Congress |
| Keywords | geothermal gradient, thermal conductivity, heat flow, core, underwater borehole |
| Abstract | Geothermal measurements in two m deep underwater boreholes in Baikal N. E) yielded a thermal gradient of 41 and average heat flow of 73 These values arc different from earlier shallow measurements. The downhole temperature at depths and 88 m sub-bottom showed an increase with depth from 3.41 to Thermal conductivity determined by needle prohe on 109 samples immediately after the core tends he lower than that measured on 553 samples several weeks later in (1.16 against 1.76 The systematic difference of about 30% between the two methods may be due to the effect of outgassing and consolidation of sediments. A sound resolution of the questions encountered can be obtained by repeated measurements in underwater boreholes to be drilled in 1995 - 1997. |