Geothermal Resources

Simmons, S. W.

doi:10.1016/b978-0-12-409548-9.12546-1

Cited by 5 publications

(2 citation statements)

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“…Some hot springs emanate from volcanic parts from the bottom of the ocean floor (McCall 2013). To add, surface waters of hot springs may be classified into three: they are considered coming from geysers; some originated from fumaroles, while others are created from cold gas seeps (Simmons 2021). Regardless of how hot springs are formed and how they are classified in terms of origin, they offer both medical and biological significance.…”

Section: Introductionmentioning

confidence: 99%

Current report on the prevalence of free-living amoebae (FLA) in natural hot springs: a systematic review

Fabros

Diesta

Oronan

et al. 2021

Journal of Water and Health

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The occurrence of potentially pathogenic free-living amoebae (FLA) in natural hot springs is considered a public health concern. FLAs are known to cause serious health outcomes to a wide spectrum of mammalian hosts. The present study aimed to provide the distribution of isolated cases of FLAs in hot springs through a systematic review process of available published articles online. Relevant studies are published between January 2010 and January 2020 involving the isolation of Naegleria spp., Acanthamoeba spp., Balamuthia spp., Sappinia spp., and Vermamoeba spp. in natural hot springs in the United States, South America, North America, Europe, Asia, and Africa. Articles were identified through a search of PubMed and Google Scholar databases. Out of 94 articles screened, a total of 20 articles are included in the study with consideration of established inclusion and exclusion criteria. The most common FLAs isolated in hot springs are Acanthamoeba spp. (134; 48.5%) and Naegleria spp. (127; 46.0%). Other FLAs isolated in hot springs include Balamuthia spp. (2; 0.7%) and Vermamoeba spp. (13; 4.7%). FLA in hot springs used for recreational and medical purposes is a potential source of infection. It is recommended that strict surveillance and maintenance of hot springs be implemented to prevent potential future infection.

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Section: Introductionmentioning

confidence: 99%

Current report on the prevalence of free-living amoebae (FLA) in natural hot springs: a systematic review

Fabros

Diesta

Oronan

et al. 2021

Journal of Water and Health

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“…The legacy of geothermal energy developments globally shows long histories of production of high-temperature resources at Larderello, Italy (>100 years), Wairakei, New Zealand (>60 years), and The Geysers, USA (>60 years) that continue through today (e.g., Simmons, 2021). At Roosevelt Hot Springs, production-related pressure drawdown has induced a several-fold increase in the supply of deep, hot chloride water, and this has been significant for the sustainability of the resource.…”

Section: Research Papermentioning

confidence: 99%

Interpretation of hydrothermal conditions, production-injection induced effects, and evidence for enhanced geothermal system-type heat exchange in response to >30 years of production at Roosevelt Hot Springs, Utah, USA

et al. 2021

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The Roosevelt Hot Springs hydrothermal system is located at the base of the Mineral Mountains in southwestern Utah on the eastern side of the Basin and Range. Hydrothermal activity is related to relatively recent bimodal magmatism, and the system is hosted in coarsely crystalline rock made of Oligocene–Miocene granitoids and Precambrian gneiss. The hydrothermal plume covers ∼5 km2, with a maximum temperature of 268 °C at ∼750 m depth, and a vertically extensive fault-fracture mesh east of the Opal Mound fault controls the upflow of hydrothermal fluids. Power generation (currently 38 MWe gross) began in 1984, and up through 2016, four wells were used for fluid production, and three wells were used for edge-field injection. Chemical analyses of produced fluids show that modern reservoir fluid compositions are similar to but more concentrated than those at the start of production, having near-neutral pH, total dissolved solids of 7000–10,000 mg/kg, and ionic ratios of Cl/HCO3 ∼50–100, Cl/SO4 ∼50–100, and Na/K ∼4–5. Chemical geothermometers indicate equilibration temperatures that mainly range between 240° and 300 °C. Early production induced a steep drop in pressure (∼3.0–3.5 MPa), which was accompanied by a 250–300 m lowering of piezometric levels in wells and development of a shallow steam zone across the system. Hydrothermal fluid compositions evolved continuously in response to production-related steam-loss and injection breakthrough, which is reflected by gradual increases in chloride of up to 35% and stable isotope ratios of up to ∼2‰δ18O and ∼10‰δD. Simple mixing model calculations suggest that there has been a significant amount, ∼10–20 MWth, of sustained multi-decadal heat mining and enhanced geothermal system (EGS)–type heat transfer by the injectate as it returns to the production zone. Overall, the two factors that have sustained long-term power production (currently 38 MWe gross) are the increased upflow of deep chloride water and, to a lesser extent, the mining of heat at <1 km depth.

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Genesis of the Hajibolagh-Zalibolagh Cu-(Ag) intermediate-sulfidation epithermal deposit, Urumieh-Dokhtar magmatic arc, Iran: Evidence from ore geology, fluid inclusions, and stable isotopes

Fazli,

Ghaderi,

Tajeddin

et al. 2024

Ore Geology Reviews

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Geothermal Resources

Cited by 5 publications

References 31 publications

Current report on the prevalence of free-living amoebae (FLA) in natural hot springs: a systematic review

Current report on the prevalence of free-living amoebae (FLA) in natural hot springs: a systematic review

Interpretation of hydrothermal conditions, production-injection induced effects, and evidence for enhanced geothermal system-type heat exchange in response to >30 years of production at Roosevelt Hot Springs, Utah, USA

Genesis of the Hajibolagh-Zalibolagh Cu-(Ag) intermediate-sulfidation epithermal deposit, Urumieh-Dokhtar magmatic arc, Iran: Evidence from ore geology, fluid inclusions, and stable isotopes

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Geothermal Resources

Cited by 5 publications

References 31 publications

Current report on the prevalence of free-living amoebae (FLA) in natural hot springs: a systematic review

Current report on the prevalence of free-living amoebae (FLA) in natural hot springs: a systematic review

Interpretation of hydrothermal conditions, production-injection induced effects, and evidence for enhanced geothermal system-type heat exchange in response to &gt;30 years of production at Roosevelt Hot Springs, Utah, USA

Genesis of the Hajibolagh-Zalibolagh Cu-(Ag) intermediate-sulfidation epithermal deposit, Urumieh-Dokhtar magmatic arc, Iran: Evidence from ore geology, fluid inclusions, and stable isotopes

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Interpretation of hydrothermal conditions, production-injection induced effects, and evidence for enhanced geothermal system-type heat exchange in response to >30 years of production at Roosevelt Hot Springs, Utah, USA