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GEOLOGIC HISTORY OF THE COSO GEOTHERMAL SYSTEM
- M. Adams, Joseph N. Moore, S. Bjornstad, D. Norman
- Geology
- 2000
The Coso geothermal system is developed within a PlioPleistocene volcanic field. At least three episodes of geothermal activity have affected the area during the last 300,000 years. Travertine…
Mineralization and hydrothermal history of the Tiwi geothermal system
- Joseph N. Moore, T. Powell, M. Heizler, D. Norman
- Geology
- 1 August 2000
Tiwi is one of several large geothermal fields in the Philippines. In 1992, the drilling of Matalibong-25 provided nearly 1,650 m of continuous core from the geothermal reservoir. A maximum…
N2-Ar-He compositions in fluid inclusions: Indicators of fluid source
- D. Norman, J. Musgrave
- Geology
- 1 February 1994
METHANE AND EXCESS N 2 AND Ar IN GEOTHERMAL FLUID INCLUSIONS
- D. Norman, Joseph N. Moore
- Geology
- 1999
Examination of thousands of fluid inclusion gas analyses has led us to question some working hypotheses associated with interpretations of N2/Ar ratios in geothermal volatiles. Fluid inclusion gas…
Fluid inclusion gas compositions from an active magmatic–hydrothermal system: a case study of The Geysers geothermal field, USA
- Joseph N. Moore, D. Norman, B. M. Kennedy
- Geology
- 1 March 2001
40 Ar/ 39 Ar dating and mineral paragenesis for carlin-type gold deposits along the Getchell Trend, Nevada; evidence for Cretaceous and Tertiary gold mineralization
- J. Groff, M. Heizler, W. McIntosh, D. Norman
- Geology
- 1 August 1997
The orebodies at the Getchell and Twin Creeks mines were studied through mineral paragenesis, geologic relationships, and 40 Ar/ 39 Ar dating. Mineral paragenetic relationships are based on…
Analysis of volatiles in fluid inclusions by mass spectrometry
- D. Norman, F. J. Sawkins
- Geology
- 25 March 1987
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