 | | Journal (article/letter/editorial) | | Alteration and Fluid Geochemistry of the Tongonan Geothermal Field, Philippines Graeme L. SCOTT Abstract: The...during the history of the Tongonan Geothermal Field. Thermal activity in the Tongonan area began in the Miocene...gas was released to a geothermal fluid and condensed in groundwater with geothermal steam. The condensate...hydrothermal eruptions. The output of gas to the geothermal fluid decreased, while the salinity (10,000 mg/kg...mg/kg or ~ 2 wt% NaCl) and the temperature of the geothermal fluid remained nearly constant throughout the |  | | Journal (article/letter/editorial) | | ISOTOPE SHIFT DATAAND THE NATURAL EVOLUTION OF GEOTHERMAL SYSTEMS PETER BLATTNER New Zealand Geological...Isotope shift data and the natural evolution of geothermal systems. In: Y. Kitano (Guest-Editor), Water--Rock...Since most of the actual isotope exchange in geothermal systems takes place in reaction zones with a...water throughput, or hydrological maturity, of geothermal systems in terms of the measurable isotope shifts...late stages of evolution. Several examples of geothermal systems are discussed and placed into a tentative |  | Bargar, Keith E., Keith, Terry E.C., Trusdell, Frank A., Evans, S.R., Sykes, M.L. (1996) Hydrothermal alteration mineralogy of SOH drill holes, Kilauea East Rift Zone geothermal area, Hawaii. Open-File Report Vol. 1996 (96-10) US Geological Survey doi:10.3133/ofr9610 | Report (issue) | | Mineralogy of SOH Drill Holes, Kilauea East Rift Zone Geothermal Area, Hawaii By Keith E. Bargar 1 , Terry E...FIGURES 1. Map showing the location of three SOH geothermal drill holes and the earlier HGP-A drill hole...for fluid inclusions in hydrothermal anhydrite, calcite, and quartz crystals from the SOH drill holes ...of fluid inclusions in hydrothermal anhydrite, calcite, and quartz crystals fro67 ten locations in SOH-4...A. liquid-rich, secondary fluid inclusions in calcite; B. liquid-rich, secondary fluid inclusions in |  | | Journal (article/letter/editorial) | | The chemistry of geothermal waters in Iceland. III. Chemical geothermometry in geothermal investigations...revised_form December 13, 1982) Abtraet-New data from geothermal wells in Iceland have permitted empirical calibration...estimating underground temperamres in fumarolic geothermal fields. Its application involves analysis of...applications of geochemistry in the exploration of geothermal resources involves estimation of underground...is possible to evaluate temperatures in deep geothermal reservoirs below the cooiing zones by using chemical |  | | Journal (article/letter/editorial) | | located in the Coromandel Peninsula of the North Island of New Zealand (Fig. 1). It contains *A digital... Auckland 38°S 0 200 km 0 N Great Barrier Island Coromandel Peninsula 20 km Alluvial sediments...location of the Hauraki goldfield within the North Island of New Zealand. Previously published fluid inclusion...inclusion fluids with the reservoir fluids in geothermal fields from around the world. Furthermore, the...lesser vein breccias and local quartz after platy calcite; the veins have rare cavities lined by comb quartz |  | Bird, Dennis K., Schiffman, Peter, Elders, Wilfred A., Williams, Alan E., McDowell, S. Douglas (1984) Calc-silicate mineralization in active geothermal systems. Economic Geology, 79 (4) 671-695 doi:10.2113/gsecongeo.79.4.671 | Journal (article/letter/editorial) | | worldwide.The mostcommonmetasomatic calc-silicates in geothermal systems areheulandite, laumontite,wairakite,prehnite...Suchobservations are critical erals in worldwide active geothermal systemsare in evaluatingcalc-silicatephaserelationsin...andcompositional In the pasttwentyyearsexplorationof geothermal variationsof specificcalc-silicatemineralsin...pressuresin deep drill holes. Calc-Silicate Minerals in Geothermal Systems Metasomaticcalc-silicatesreported in...Taiwan X X X X System • landitc Tongonan, Philippines X Broadlands, New X itc dote bole |  | | Report (issue) | | Deposit Modeling, held December 5-14, 1985, in the Philippines. The bibliography compiles many of the recent...and remote-sensing investigations. Studies of geothermal systems are included because of their analogy...R., and Fuffield, W. A., 1980, Coso Geothermal Area, Geothermal investigations in the Coso Range, California;...Pleistocene high silica rhyolites of the Coso Volcanic Field, Inyo County, California; Journal of Geophysical...minerals from Mofete 2, Mofete 5 and San Vito 3 geothermal wells, Phlegrean Fields, Campania, Italy: International |  | | Report (issue) | | and remote-sensing investigations. Studies of geothermal systems are included because of their analogy...R., and Duffield, W. A., 1980, Coso Geothermal Area, Geothermal investigations in the Coso Range, California:...Pleistocene high silica rhyolites of the Coso Volcanic Field, Inyo County, California: Journal of Geophysical...minerals from Mofete 2, Mofete 5 and San Vito 3 geothermal wells, Phlegrean Fields, Campania, Italy: International...in epithermal precious-metal bearing, fossil geothermal systems in the Great Basin, in The role of heat |  | | Report (chapter) | | Chicago on July 8, 2015 Environmental impact of geothermal energy utilization STEF/~N A R N O R S S O N...(e-mail stefanar@raunvis.hi.is) Abstract: Presently geothermal energy accounts for 0.25% of the annual world-wide...Extraction of heat from geothermal reservoirs involves drillings. Exploitation of geothermal resources is generally...it preferable as a source for power and heat. Geothermal energy exploitation has locally some adverse...and cause land subsidence. The development of geothermal fields must sometimes be evaluated against the |  | | Book | | DEPOSITS Developments in Economic Geology 12 geothermal resources: an energy alternative by Harsh K...Bibliography: p. Includes index. 1. Geothermal e n g i n e e r i n g . 2. Geothermal resources. I. Title. II. Series...and Shri Vishnu Kumar FOREWORD The monograph Geothermal Resources: An Energy Alternative by Harsh K....a readable, coherent account of all facets of geothermal energy development. The development of alternative...to bring alternative energy resources on line. Geothermal energy promises to play a role in supplying electric |  | | Report (issue) | | GEOLOGICAL SURVEY Estimated temperatures for geothermal drill holes at Medicine Lake Volcano, northeastern...volcano showing the location of 11 of the 12 geothermal prospect drill holes included in this study ...hydrothermal alteration minerals with depth in sampled geothermal drill holes of the Medicine Lake volcano area...showing: 23. a. Rhombic calcite crystals coating a fracture, b. Scalenohedral calcite crystals that line a...14. 15. Hydrothermal minerals identified from geothermal drill holes at Medicine Lake volcano and the |  | | Report (volume) | | the last years from several working groups in the field of experimental studies and spectroscopic work....the epdiote minerals, from low temperature in geothermal fields (Chapter 6, Bird and Spieler), to common...(Bonazzi et al. 1996), named after its locality Andros Island/Greece; dissakisite(Ce) (Grew et al. 1991), named...unpublished results), and in hydrothermal epidote from geothermal fields (Bird and Spieler 2004), and might in...define a field of optical positive sign on the Al-rich side of the ternary system, and this field extends |
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