Update on the fluid geochemistry monitoring time series for geothermal systems in Dominica, Lesser Antilles island arc: 2009–2017

Joseph, E. P.; Frey, H. V.; Manon, Matthew R.F.; Onyeali, Mazi-Mathias C.; DeFranco, Karyn; Metzger, Tara; Aragosa, Carli

doi:10.1016/j.jvolgeores.2019.03.010

Cited by 5 publications

(5 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After 2016, the Cl − concentration increased, indicating a supply from different aquifers. Similar temporal changes in chemical composition occur in several volcanic areas, influenced by different aquifers [ 5 , 39 , 40 ].…”

Section: Resultsmentioning

confidence: 88%

“…The chemical composition of thermal water is often used to estimate the reservoir temperature [ 5 , 30 , 31 , 32 ]. Most of the springs in the TVG do not reach equilibrium with minerals, and cation geothermometry may provide uncertain results [ 34 ].…”

Section: Resultsmentioning

confidence: 99%

“…In many volcanic areas, chemical monitoring has been conducted to reveal the state of the volcano, in order to reduce the volcanic hazards [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. The hydrothermal system in the volcanic area usually has a direct connection to the magma system [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…Long-term geochemical variation of the thermal waters is useful for understanding the magmatic-hydrothermal system in volcanic areas. The chemical composition of volcanic thermal water is affected by feeding from different aquifers [ 3 , 5 ] or the pressure and temperature variations in shallow hydrothermal systems [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Analysis of Hydrothermal Systems Beneath Tayukeng through Long-Term Geochemical Signals of Hydrothermal Fluids in Tatun Volcano Group, Taiwan

Yeh

Hsu

2021

IJERPH

View full text Add to dashboard Cite

The Tatun Volcano Group (TVG) is located in northern Taiwan and consists of many springs and fumaroles. The Tayukeng (TYK) area is the most active fumarole site in the TVG. In this study, we analyzed the long-term geochemical variations of hydrothermal fluids and proposed a mechanism responsible for the variation in TYK. There are two different aquifers beneath the TYK area: a shallow SO42−-rich aquifer and a deeper aquifer rich in Cl−. TYK thermal water was mainly supplied by the shallow SO42−-rich aquifer; therefore, the thermal water showed high SO42− concentrations. After 2015, the inflow of deep thermal water increased, causing the Cl− concentrations of the TYK to increase. Notably, the inferred reservoir temperatures based on quartz geothermometry increased; however, the surface temperature of the spring decreased. We inferred that the enthalpy was lost during transportation to the surface. Therefore, the surface temperature of the spring does not increase with an increased inflow of deep hydrothermal fluid. The results can serve as a reference for understanding the complex evolution of the magma-hydrothermal system in the TVG.

show abstract

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of Hydrothermal Systems Beneath Tayukeng through Long-Term Geochemical Signals of Hydrothermal Fluids in Tatun Volcano Group, Taiwan

Yeh

Hsu

2021

IJERPH

View full text Add to dashboard Cite

show abstract

“…Dominica is one of the largest and most mountainous islands within the Caribbean [7], measuring roughly 47 km in length and 29 km at its widest point [35]. It is geologically young (Figure 2a), originating from volcanic activity in the early Miocene [36], and contains nine volcanic complexes with seven active volcanic centres dating back to the late Pleistocene [37]. The large concentration of active volcanoes is amongst the highest on Earth [38].…”

Section: Geological Backgroundmentioning

confidence: 99%

InSAR Monitoring of Landslide Activity in Dominica

Fobert

Singhroy²,

Spray

2021

Remote Sensing

View full text Add to dashboard Cite

Dominica is a geologically young, volcanic island in the eastern Caribbean. Due to its rugged terrain, substantial rainfall, and distinct soil characteristics, it is highly vulnerable to landslides. The dominant triggers of these landslides are hurricanes, tropical storms, and heavy prolonged rainfall events. These events frequently lead to loss of life and the need for a growing portion of the island’s annual budget to cover the considerable cost of reconstruction and recovery. For disaster risk mitigation and landslide risk assessment, landslide inventory and susceptibility maps are essential. Landslide inventory maps record existing landslides and include details on their type, location, spatial extent, and time of occurrence. These data are integrated (when possible) with the landslide trigger and pre-failure slope conditions to generate or validate a susceptibility map. The susceptibility map is used to identify the level of potential landslide risk (low, moderate, or high). In Dominica, these maps are produced using optical satellite and aerial images, digital elevation models, and historic landslide inventory data. This study illustrates the benefits of using satellite Interferometric Synthetic Aperture Radar (InSAR) to refine these maps. Our study shows that when using continuous high-resolution InSAR data, active slopes can be identified and monitored. This information can be used to highlight areas most at risk (for use in validating and updating the susceptibility map), and can constrain the time of occurrence of when the landslide was initiated (for use in landslide inventory mapping). Our study shows that InSAR can be used to assist in the investigation of pre-failure slope conditions. For instance, our initial findings suggest there is more land motion prior to failure on clay soils with gentler slopes than on those with steeper slopes. A greater understanding of pre-failure slope conditions will support the generation of a more dependable susceptibility map. Our study also discusses the integration of InSAR deformation-rate maps and time-series analysis with rainfall data in support of the development of rainfall thresholds for different terrains. The information provided by InSAR can enhance inventory and susceptibility mapping, which will better assist with the island’s current disaster mitigation and resiliency efforts.

show abstract

Hydrogeology constrained by multi-isotopes and volatiles geochemistry of hot springs in Tatun Volcanic Group, Taiwan

Chao

You

et al. 2021

Journal of Hydrology

View full text Add to dashboard Cite

Update on the fluid geochemistry monitoring time series for geothermal systems in Dominica, Lesser Antilles island arc: 2009–2017

Cited by 5 publications

References 44 publications

Analysis of Hydrothermal Systems Beneath Tayukeng through Long-Term Geochemical Signals of Hydrothermal Fluids in Tatun Volcano Group, Taiwan

Analysis of Hydrothermal Systems Beneath Tayukeng through Long-Term Geochemical Signals of Hydrothermal Fluids in Tatun Volcano Group, Taiwan

InSAR Monitoring of Landslide Activity in Dominica

Hydrogeology constrained by multi-isotopes and volatiles geochemistry of hot springs in Tatun Volcanic Group, Taiwan

Contact Info

Product

Resources

About