Sistem Panas Bumi Daerah Candi Umbul-Telomoyo Berdasarkan Kajian Geologi Dan Geokimia

Hermawan, Dudi; Widodo, Sri; Mulyadi, Eddy

doi:10.47599/bsdg.v7i1.91

Cited by 10 publications

(11 citation statements)

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“…In this study, the authors experimented with quartz conductive geothermometer by [32], Na/Li for sedimentary setting by [33] and Na-K-Ca for samples containing excess Ca by [34], as presented in Table 2. The results are lower than the estimated temperature of Na/K geothermometers, as published by [15][16] [17]. The geothermometer of the cold springs suggests a reservoir temperature of 175-221°C.…”

Section: Role Of the Cold Springs To The Systemcontrasting

confidence: 60%

“…The outflows are towards Candi Umbul and Pakis Dadu thermal springs in the SW and Candi Dukuh thermal springs in the NE. [16] published the geochemical study of the thermal springs, and the conclusion of the system agrees with [15]. On the other hand, [17] proposed a different model and concluded that there are two reservoirs in the area based on the fluid evolution study of CTL-1 and CTL-2 core samples of the Geological Agency, one is located beneath Candi Umbul and Pakis Dadu, while the other is beneath Candi Dukuh.…”

Section: Geothermal System Of Candi Umbul Telomoyomentioning

confidence: 76%

“…Sedimentary and volcanic rock seems to host a geothermal reservoir in Candi Umbul Telomoyo [15]. Tertiary sedimentary rock formation under the Quaternary volcanic, namely Penyatan Formation and Kerek Formation, could have contributed to the system as studied by [14].…”

Section: Geothermal System Of Candi Umbul Telomoyomentioning

confidence: 99%

“…Three thermal manifestations have been reported in various publications (among others are [15][17] [18]), namely Candi Dukuh, Candi Umbul, and Pakis Dadu which surround Telomoyo-Andong Volcanic Complex at its foot (lower elevation, at 467-578 masl). These warm springs are generally neutral with temperature of 34.6-36.3°C with presence of gas bubbles and carbonate deposition.…”

Section: Field Observation and Analysesmentioning

confidence: 99%

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Geochemistry of Cold Springs in Geothermal Exploration Stage – Case Study of Candi Umbul Telomoyo, Central Java

Abdillah,

Sidik,

Putra

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Cold springs in geothermal fields are often overlooked during the exploration stage. The best practice of geothermal exploration suggests thermal manifestation as an indicator of a geothermal system in the subsurface. This common practice neglects cold springs as valuable information points related to the system. Thermal-contaminated cold springs can be helpful to indicate the presence of inferred geothermal activity below the surface during the exploration stage. It becomes important where thermal features are absent or limited, as in Candi Umbul Telomoyo. Candi Dukuh, Candi Umbul, and Pakis Dadu thermal springs are located at the periphery of the Telomoyo Volcanic Complex, at relatively low altitude. Those thermal springs are used to construct the existing conceptual models of the geothermal system. In this study, the authors tried to consider the presence of slightly acidic cold springs (pH 5.24-5.61). Located within the Suropati Depression in the North, and the flank of Mt. Telomoyo in the South, both Keningar and Sendang Ari Wulan cold springs are located at higher altitude with higher TDS and are enriched in Cl and SO4 compared to the others. These cold springs are associated with the argillic alteration zone and observed to have iron oxide deposition at the discharge area. Sendang Ari Wulan fluid is plotted at the same zone as the thermal springs on Na-Cl•SO4 facies of the Piper diagram, while Keningar fluid is plotted on HCO3-Ca•Mg facies are similar to other cold springs. Although Sendang Ari Wulan shows a better correlation to the thermal springs, based on Piper diagram, both Keningar and Sendang Ari Wulan cold springs are classified as HCO3-SO4 and SO4-HCO3-Cl. These observations show the possibility of contamination of the geothermal system occurring below the Keningar and Sendang Ari Wulan cold springs, which is higher than the thermal springs. This interpretation is supported by the anomaly of high Hg and CO2 surrounding the acidic Keningar and Sendang Ari Wulan cold springs, three temperature gradient wells that prove the presence of three times higher-than-normal geothermal gradient. The research concludes that cold springs data are indeed useful in aiding the interpretation, especially during the exploration stage.

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Section: Role Of the Cold Springs To The Systemcontrasting

confidence: 60%

Section: Geothermal System Of Candi Umbul Telomoyomentioning

confidence: 76%

Section: Geothermal System Of Candi Umbul Telomoyomentioning

confidence: 99%

Section: Field Observation and Analysesmentioning

confidence: 99%

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Geochemistry of Cold Springs in Geothermal Exploration Stage – Case Study of Candi Umbul Telomoyo, Central Java

Abdillah,

Sidik,

Putra

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…The lineament density is calculated by dividing the study area into grids, calculating the lineament parameters for each grid, and making lineament density contours [14]. This lineament density map helps identify areas with intensive tectonic activity, visualizes the density of faults and fractures with good permeability, and shows zones of structural openings (jogs) as potential pathways for emerging fluids so that they can become weak or sliding zones [15].…”

Section: Methodsmentioning

confidence: 99%

Landslide disaster mitigation and adaptation strategy in one of the East Java horseshoe areas using geographic information system analysis

Irawan,

Haeruddin,

Aminah

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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The horseshoe area of East Java is an area that has abundant natural resource potential. In the northern part of the horseshoe region there is a very good biological natural resource with the potential to be used as a food source. Meanwhile, in the southern part is rich with biological and mining potential. This potential causes changes in land use in the northern and southern regions which can trigger landslides in the Horseshoe area. Changes in land use that change the topography and vegetation to become steep and barren will have a very significant impact on landslides. This study aims to map and predict areas affected by erosions using environmental and physical data using Geographic Information System (GIS) Analysis. The results of the mapping are areas that have threats and are vulnerable as well as capacity to erosion. Based on the results of the mapping, it shows that the index of threats greatly influences the hazard of landslides that occur in the area. Based on the result of the mapping, it shows that the disaster mitigation and adaptation strategy is to reduce the threat index or very high vulnerabilities that affect the risk of landslides that occur in an area.

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Microtremor data and HVSR method of geothermal manifestation of Mt. Telomoyo, Central Java, Indonesia

Yuliyanto,

Yulianto

2023

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Sistem Panas Bumi Daerah Candi Umbul-Telomoyo Berdasarkan Kajian Geologi Dan Geokimia

Cited by 10 publications

References 0 publications

Geochemistry of Cold Springs in Geothermal Exploration Stage – Case Study of Candi Umbul Telomoyo, Central Java

Geochemistry of Cold Springs in Geothermal Exploration Stage – Case Study of Candi Umbul Telomoyo, Central Java

Landslide disaster mitigation and adaptation strategy in one of the East Java horseshoe areas using geographic information system analysis

Microtremor data and HVSR method of geothermal manifestation of Mt. Telomoyo, Central Java, Indonesia

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