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Dacite Melt at the Puna Geothermal Venture Wellfield, Big Island of Hawaii

GRC Transactions, Vol. 33, 2009
William Teplo, Bruce Marsh, Jeff Hulen, Paul Spielman, Mike Kaleikini, David Fitch, and William Rickard
Consulting Geologist: Dept. Earth & Planetary Sci., • Johns Hopkins University • Ormat • PGV • Resource Group

Dec 2, 2008

The research article discusses the discovery of dacite melt during the drilling of an injection well at the Puna Geothermal Venture wellfield in Hawaii.

Dacite melt can contribute to the formation of various valuable mineral deposits, depending on the specific geological conditions. Some examples include precious metal deposits like gold and silver, base metal deposits such as copper and lead, as well as certain types of hydrothermal mineral deposits like epithermal veins and porphyry deposits.

The specific mineralization associated with dacite melt is influenced by factors such as the composition of the melt, temperature, pressure, and availability of fluids and mineralizing agents in the surrounding rock.

The research article titled "Dacite Melt at the Puna Geothermal Venture Wellfield, Big Island of Hawaii" discusses the discovery of dacitic melt during the drilling of injection well KS-13 at the Puna Geothermal Venture (PGV) wellfield in Hawaii.

The authors describe the mineralogical and chemical characteristics of the dacite glass cuttings encountered and estimate the temperature of the magma based on its composition. The study suggests that the presence of an anhydrous dacite melt indicates a high rock temperature of approximately 1050°C and demonstrates the potential for commercial exploitation of this heat source.

The findings shed light on the geologic conditions and magma-related activities in the Kilauea Lower East Rift Zone, providing insights into geothermal energy resources in the area.

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