Analysis of magnetic anomalies over Yellowstone National Park: Mapping of Curie point isothermal surface for geothermal reconnaissance

Bhattacharyya, B. K.; Leu, L. K.

doi:10.1029/jb080i032p04461

Cited by 215 publications

(110 citation statements)

References 6 publications

(4 reference statements)

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“…Correlation with magnetotelluric soundings Stanley et al (1977) have calculated the depth to the highly conductive zone from magnetotelluric soundings in the eastern Snake River Plain-Yellowstone region. They found a close correspondence of the depth of 5 to 7 km for the conductive layer to the depth of 5 to 6 km for the base of the magnetic crust in Yellowstone (Bhattacharyya and Leu, 1975). A good correlation is also found between the depth to the base of the magnetic crust and the depth to the top of the highly conductive layer in the crust in the eastern Snake River Plain.…”

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confidence: 60%

Interpretation of magnetic anomalies over southern Idaho using generalized multibody models

Bhattacharyya¹,

Mabey²

1980

Open-File Report

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Data from1 several aeromagnetic surveys over southern Idaho, flown at different times, elevations, and line spacings, have been integrated into a consistent digital data set at a fixed elevation of 3.8 km above sea level* The integrated magnetic field then was continued upward to the levels of 7.6 km and 11.4 km above sea level. The dominant feature in the magnetic maps of southern Idaho is a zone of high intensity over the Snake River Plain. Over the western part of the plain, the magnetic anomaly pattern is relatively simple, with a high along the south edge Idaho batholith seems to consist of uniform, weakly magnetized rocks from the surface to a depth greater than 6 km. The bottom of the magnetic crust ranges in depth from 7 to 26 km below sea level, agreeing well with depths to the top of the highly conductive crust interpreted from magnetotelluric soundings in eastern Idaho.

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confidence: 60%

Interpretation of magnetic anomalies over southern Idaho using generalized multibody models

Bhattacharyya¹,

Mabey²

1980

Open-File Report

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“…This data was collected in 1974-1975. In this study, the centroid depth and forward modelling of the spectral peak methods of the aeromagnetic data were used to determine CPD. Bhattacharyya and Leu (1977) presented a method for determining the centroid of rectangular parallel piped sources, which it had been used in their earlier study (Bhattacharyya and Leu 1975) to investigate the Curie depths of Yellowstone Park. This method was further developed by Okubo et al (1985) who combined and expanded the ideas of the methods to the purpose of geothermal exploration.…”

Section: Methodsmentioning

confidence: 99%

“…Bhattacharyya and Leu (1975) mapped Curie point isothermal surface for geothermal reconnaissance of the Yellowstone National Park in USA. In this area, CPD was estimated 4-8 km.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Curie point depths and heat flow from Ardebil province, Iran, using aeromagnetic data

et al. 2016

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This study attempts to estimate the Curie point depth (CPD) using the centroid and forward modelling of the spectral peak methods in the Sabalan geothermal field in Ardabil, NW of Iran. The reduced-to-pole aeromagnetic data were divided into 18 overlapping blocks of the sizes of 100 × 100 km. In the centroid method, the average depth to the top of the deepest crustal block, Z t , was first computed by linear fitting to the second longest wavelength segment of the power spectrum of aeromagnetic data. Then, depth to the centroid of the deepest crustal block, Z 0 , was computed by linear fitting to the longest wavelength segment of the power spectrum of the aeromagnetic data. The depth to the magnetic bottom was obtained from Z b = 2Z 0 − Z t . In the forward modelling of the spectral peak method, the modelled spectra fitted to the observed spectrum iteratively and Z t and Z b were finally estimated. According to the obtained results, the CPD varies from 10 to 18.6 km. The Curie temperature of magnetite was used to determine the thermal gradient and the heat flow in the area. The study area is found to have a great energy potential in the west, northwest and the southwest of the Sabalan with shallow CPD, high geothermal gradient and heat flow.

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“…In an area where so much of the magnetic signal originates in near-surface basalts with well-characterized normal and reversed remnant magnetization, and where higher-than-usual magnetic data already exist or are being added to d , a rigorous modern magnetic analysis like that performed recently for Yellowstone by Finn and Morgan (2002) might resolve questions about the signal-to-noise content of near-surface magnetic sources in the 1964 and Geophysical Data for the Northern Rocky Mountains magnetic residual data sets and refine subsurface details in areas where dense well data is lacking. Since detailed geothermal data and modeling exist for the eastern Snake River Plain and its environs, a detailed depth-to-Curie point analysis of the INL area similar to that of Bhattacharyya and Leu (1975) for Yellowstone would also contribute to the analysis of unexpected anomalies like that of Lava Ridge. These suggested analyses will not be performed for the OU 10-08 model development project.…”

Section: C-27mentioning

confidence: 99%

Development Report on the Idaho National Laboratory Sitewide Three-Dimensional Aquifer Model

Wood¹,

Helm-Clark²,

Huang³

et al. 2007

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A sub-regional scale, three-dimensional flow model of the Snake River Plain Aquifer was developed to support remediation decisions for Waste Area Group 10, Operable Unit 10-08 at the Idaho National Laboratory (INL) Site. This model has been calibrated primarily to water levels and secondarily to groundwater velocities interpreted from stable isotope disequilibrium studies and the movement of anthropogenic contaminants in the aquifer from facilities at the INL. The three-dimensional flow model described in this report is one step in the process of constructing a fully three-dimensional groundwater flow and contaminant transport model as prescribed in the Idaho National Engineering and Environmental Laboratory Operable Unit 10-08 Sitewide Groundwater Model Work Plan.An updated three-dimensional hydrogeologic conceptual model is presented along with the geologic basis for the conceptual model. Sediment-dominated three-dimensional volumes were used to represent the geology and constrain groundwater flow as part of the conceptual model. Hydrological, geochemical, and geological data were summarized and evaluated to infer aquifer behavior. A primary observation from development and evaluation of the conceptual model was that relative to flow on a regional scale, the aquifer can be treated with steady-state conditions. Boundary conditions developed for the three-dimensional flow model are presented along with inverse simulations that estimate parameterization of hydraulic conductivity. Inverse simulations were performed using the pilot-point method to estimate permeability distributions. Thermal modeling at the regional aquifer scale and at the sub-regional scale using the inverted permeabilities is presented to corroborate the results of the flow model.The results from the flow model show good agreement with simulated and observed water levels almost always within 1 meter. Simulated velocities show generally good agreement with some discrepancies in an interpreted low-velocity region near the toe of the Arco Hills. This discrepancy persisted in each of the aquifer bottom thickness scenarios that were simulated precluding decisions on which aquifer bottom thickness to use in transport simulations. When joint-calibration was performed using both water levels and velocities assigned as calibration targets, the discrepancy was prevented. This result highlighted the need to consider multiple calibration objectives and not rely solely on calibration to water levels.

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Analysis of magnetic anomalies over Yellowstone National Park: Mapping of Curie point isothermal surface for geothermal reconnaissance

Cited by 215 publications

References 6 publications

Interpretation of magnetic anomalies over southern Idaho using generalized multibody models

Interpretation of magnetic anomalies over southern Idaho using generalized multibody models

Estimation of Curie point depths and heat flow from Ardebil province, Iran, using aeromagnetic data

Development Report on the Idaho National Laboratory Sitewide Three-Dimensional Aquifer Model

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