system at Coso. This investigation is Part of an ongoing study being perCos0 is one of several high-tempeformed through an agreement betwen rature geothermal systems associated California Energy Company and the Earth with recent volcanic activity in the Science Laboratory Division/university Basin and Range province. Within this of Utah Research Institute. fracture-dominatedsystem, temperatnres...

Geothermal areas are long recognized to be susceptible to remote earthquake triggering, probably due to the high seismicity rates and presence of geothermal fluids. However, anthropogenic injection and extraction activity may alter the stress state and fluid flow within the geothermal fields. Here we examine the remote triggering phenomena in the Coso geothermal field and its surrounding areas ...

Vapor-dominated geothermal systems are proposed to originate by downward extension (by the "heat pipe" mechanism) into hot dry fractured rock above a large cooling igneous intrusion. High temperature zones found by drilling are shallow parts of the original hot dry rock where the penetration of the vapor reservoir was limited, and hot dry rock may extend under much of these reservoirs. An earli...

The geothermal potential of West Mesa has historically been assumed to be small because it is thought to be dominated by a left-stepping transpressional regime that is generally tight and not conducive to open fluid pathways. This may not be the complete picture, however. The 85 MWe Heber geothermal project appears to be located in a right stepover from the northwest trending seismogenic extens...

High temperature geothermal systems are the modern analogue of epithermal precious metal ore deposits. In these systems, gold and silver are transported primarily as bisulfide complexes, with the precious metals being deposited in response to boiling and mixing of the deep geothermal fluid. In order for the geothermal system to produce an economic precious metal deposit within the typical lifet...

A proper protection system guarantees reliable and safe operation for a geothermal power plant. It is one of the most important factors during system engineering design and must be carefully selected to avoid equipment damage due to failures. The process design should include the selection of a protection scheme as well as adequate main and auxiliary equipment and installation considerations. A...

Concept of the deep-seated geothermal resources Deep-seated geothermal resources is defined as the depth of 3000-4000m at temperature of approximately 350 degrees C. And it is considered that those deep-seated geothermal resources exist below shallow geothermal reservoirs whch already exploited. 580,000 KW. And it is indispensable to explore geothermal resources " to increase it rapidly. In Jap...

Geoscientists from the Coso Operating Company, EGI-Utah, GeoMechanics International, and the U.S. Geological Survey are cooperating in a multi-year study to develop an Enhanced Geothermal System (EGS) in the Coso Geothermal Field. Key to the creation of an EGS is an understanding of the relationship among natural fracture distribution, fluid flow, and the ambient tectonic stresses that exist wi...

There are more than 3000 natural geothermal outcrops in China. The two high temperature geothermal areas in China include the Taiwan geothermal zone and the Himalayan geothermal zone. Low temperature geothermal areas are widely distributed in the vast area of Chinese mainland. The distribution of hot springs, geothermal wells and heat flow are controlled by geological structure. Taking the Ordo...