Geothermal studies in China

Wang, Jing; Mo-xiang, Chen; Wang, Jian; Xiao, Deng; Wang, Jun; Hsienchieh, Shen; Liang-Ping, Hsiung; Yan, Shi; Zhi-Cheng, Fan; Xiu-Wen, Liu; Ge-Shan, Huang; Wenren, Zhang; Hai-Hui, Shao; Zhang, Rongyan

doi:10.1016/0377-0273(81)90014-7

“…By contrast, limestones within the IYSZ and adjoining Gangdese arc evidently continued to experience alteration in the presence of some combination of higher temperatures and meteoric waters with variable d 18 O values. Alteration in this setting is unsurprising given the high geothermal gradients (Francheteau et al, 1984), hydrothermal alteration and abundant modern hot spring activity (Ji-Yang et al, 1981), and deep burial and ongoing deformation (Laskowski et al, 2018) 12, 13).…”

Section: Oxygen and Clumped Isotope Recordmentioning

confidence: 99%

“…No thermochronologic data have been generated from 1LQ, but AFT and AHe data from 6LQ and 7LQ ~40 km west along strike suggest cooling from >80°C after 10-12 Ma (Li et al, 2015). Heat flow values of 88-242 mW m -2 ~150 km to the east of 1LQ (Francheteau et al, 1984), rapid cooling at 10 Ma and estimated paleogeothermal gradients as high as 400°C/km ~200 km west of 1LQ (Mahéo et al, 2007), and abundant hot springs along the India-Asia suture zone (Ji-Yang et al, 1981) all suggest the possibility of high temperatures and/or high-temperature fluid interactions at modest burial depths. The challenge in this scenario comes in explaining the low T(47) and d 18 Opc values from section 1LQ.…”

Section: Liuqu Conglomeratementioning

confidence: 99%

Resetting Southern Tibet: The serious challenge of obtaining primary records of Paleoaltimetry

Quade

¹

,

Leary

²

,

Dettinger

³

et al. 2020

Global and Planetary Change

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Over the last several decades a number of studies have attempted to reconstruct the rise of the Himalaya and Tibet since India-Asia collision began in the early Cenozoic, with rather contradictory results. Here, we evaluate the efforts at reconstructing the history of this major mountain-building event as archived in oxygen, carbon, and clumped isotope records from carbonates exposed on the southern Tibetan Plateau. We find that a number of potential isotopic records of paleoaltimetry from Tibet -using both conventional oxygen and clumped isotope systems-may have been reset during burial and heating. Without exception, the marine d 18 O values

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“…Oxygen and hydrogen isotope analyses were performed in the Water Isotope and Water-Rock Interaction Laboratory at the Institute of Geology and Geophysics, Chinese Academy of Sciences, using a laser absorption water isotope spectrometer analyzer (L1102-I, Picarro) which used wavelength scanning optical cavity ring-down spectroscopy (WS-CRDS) technology. Analysis of δ 18 O and δD used the Vienna Standard Mean Ocean Water (V-SMOW) as the standard. The analytical precision of δ 18 O and δD measurements was ±0.1‰ and ±0.5‰, respectively [37].…”

Section: Geological Settingsmentioning

confidence: 99%

“…The study of geothermal fluids can increase the understanding of the geological significance of geothermal genesis, reservoir temperature, heating mechanism, circulation depth, and supply source [15][16][17][18] and can also act as a basis for exploring mantle-derived material and the shallow response resulting from the geodynamic process of plate subduction. The isotopic composition of gas is widely used to study deep structural changes and the transport mechanism in cratons (e.g., [19][20][21][22][23][24]).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fluid Geochemistry within the North China Craton: Spatial Variation and Genesis

Lu

¹

,

Li

²

,

Zhi

³

et al. 2021

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The North China Craton (NCC) is a typical representative of the ancient destruction craton. Numerous studies have shown that extensive destruction of the NCC occurred in the east, whereas the western part was only partially modified. The Bohai Bay Basin is in the center of the destruction area in the eastern NCC. Chemical analyses were conducted on 122 hot spring samples taken from the eastern NCC and the Ordos Basin. The δ 2 H and δ 18 O in water, δ 13 C in CO2, and 3He/4He and 4He/20Ne ratios in gases were analyzed in combination with chemical analyses of water in the central and eastern NCC. The results showed an obvious spatial variation in chemical and isotopic compositions of the geofluids in the NCC. The average temperature of spring water in the Trans-North China Block (TNCB) and the Bohai Bay Basin was 80.74°C, far exceeding that of the Ordos Basin of 38.43°C. The average δ D in the Eastern Block (EB) and the TNCB were −79.22‰ and −84.13‰, respectively. The He isotope values in the eastern region (TNCB and EB) ranged from 0.01 to 2.52, and the rate of contribution of the mantle to He ranged from 0 to 31.38%. δ 13 C ranged from −20.7 to −6.4‰ which indicated an organic origin. The chemical compositions of the gases in the EB showed that N2 originated mainly from the atmosphere. The EB showed characteristics of a typical gas subduction zone, whereas the TNCB was found to have relatively small mantle sources. The reservoir temperatures in the Ordos Basin and the eastern NCC (EB and TNCB) calculated by the K-Mg temperature scale were 38.43°C and 80.74°C, respectively. This study demonstrated clear spatial variation in the chemical and isotopic compositions of the geofluids in the NCC, suggesting the presence of geofluids from the magmatic reservoir in the middle-lower crust and that active faults played an important role in the transport of mantle-derived components from the mantle upwards.

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Mapping the spatial distribution of fossil geothermal manifestations and assessment of geothermal potential of the Tangyin rift, Southeast of Taihang Mountain in China

Mahwa

¹

,

Li

²

,

Ping

³

et al. 2022

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The spatial prediction of geothermal sites along the southeast side of Taihang Mountain in the Tangyin rift is a critical goal in the development of renewable energy resources in cities such as Hebi in Henan province, which has significant potential for geothermal energy production due to the existence of deep faults and Cenozoic volcano. The study aimed to delineate areas with high geothermal manifestations for detailed geothermal exploration and well-test drilling. To define favorable zones for geothermal potentiality, multi-source datasets were chosen to generate evidence thematic layers that demonstrate the distribution of geothermal anomalies such as geologic maps, structural maps, Land Surface Temperature maps (LST), and hydrothermal mineral alterations maps. The remote sensing and Geographical Information System (GIS) approaches were integrated to map fossil geothermal manifestations and appraise the promising geothermal zones from Landsat 8 OLI/TIRS and Advanced Spaceborne Thermal Emission and Reflection Radiometer-Digital Elevation Model (ASTER-DEM) dataset using the Analytic Hierarchy Process (AHP), which is one of the Mult-criteria Decision Making methods. Results show LST values ranging from 22.6°C to 45.4°C, with the highest values found along the faults and volcanic areas. The hydrothermal alteration minerals discriminated from band ratios of 4/2, 6/5, and 6/7 for iron oxide, ferrous minerals, and clays reveal the presence of high amount of montmorillonite and illite minerals along the faults and volcanoes which are related to hot fluid circulation from subsurface. Structural analysis shows that the major structural trend follows the NNE Tangdong and Tangxi faults, with high density on the west side of the Tangxi fault where there is good exposure of outcrop but less fault density on the east side due to sedimentation in a low land which may conceal geological structures. Lastly, all the thematic layers of geothermal factors were reclassified, ranked, and integrated by the weight overlay logic model based on the influence of geothermal suitability to map potential areas for geothermal resources whereby 5 zones were obtained ranging from very poor to very good. The promising potential sites are mostly found along the highly deep structures of the major Tangxi fault crosscutting the permeable lithology of carbonate rocks and around the Hebi volcanoes. The distribution of hot springs and geothermal wells of the Hebi field were correlated and verified against the potential geothermal anomalies map. The overall integrated method proposes an advanced technique for designing the Tangyin rift’s exploration plan and development actions for geothermal resources utilization, which can be used for exploration of any unveiling geothermal potential sites.

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Geothermal studies in China

Cited by 19 publications

References 0 publications

Resetting Southern Tibet: The serious challenge of obtaining primary records of Paleoaltimetry

Resetting Southern Tibet: The serious challenge of obtaining primary records of Paleoaltimetry

Fluid Geochemistry within the North China Craton: Spatial Variation and Genesis

Mapping the spatial distribution of fossil geothermal manifestations and assessment of geothermal potential of the Tangyin rift, Southeast of Taihang Mountain in China

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