Electrical resistivity structure of the Xiaojiang strike-slip fault system (SW China) and its tectonic implications

Li, Xin; Bai, Donglu; Ma, Xueli; Chen, Yun; Варенцов, И.М.; Xue, Gang; Xue, Shuai; Lozovsky, I. N.

doi:10.1016/j.jseaes.2019.01.031

Cited by 39 publications

(22 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Aquifer rocks dissolved in the infiltrating water and freshening started, consisting of cation exchange during groundwater flow. The values of δD and δ 18 O of springs from high mountain areas were more negative, while the river water values collected in lower altitude regions were less negative, which is constant with the previous results [41,50]. According to the relation between the oxygen isotope and the recharging elevation (δ 18 O = −0.002ALT − 6.327) [52], the recharging elevation is calculated to be about 1.8~4.5 km.…”

Section: Origin Of Hot Spring Watersupporting

confidence: 80%

“…and ±1% (2S.D.) were obtained for δ 18 O and δD in a standard water sample, respectively [46]. The inductively coupled plasma emission spectrometer Optima-5300 DV (PerkinElmer Inc.) was used to detect SiO 2 .The threshold value of continuous monitoring was calculated according to the equation X + 2σ (X: average value; 2σ: twice of variance).…”

Section: Sampling and Analyzing Methodsmentioning

confidence: 99%

“…likely associated with partial melting at high temperatures [18,72,88,89]. Additionally, the XJF is characterized by moderately high total strain rates and low 3 He/ 4 He values (mostly < 0.10 RA), suggesting that crustal He degassing dominates such fault regions [35].…”

Section: The Hydrogeochemical Circulation Model Of Hot Spring Waters In Xiaojiang Faultmentioning

confidence: 99%

“…The majority of the water samples were distributed near to the local meteoric water line (LMWL) of the Kunming δD = 6.56 δ 18 O-2.96 (R 2 = 0.91, n = 151) [48], indicating that the spring waters were mainly originated from meteoric water [49][50][51] (Figure 2). Nanpan river that is the main river along the XJF with δD mean of −69.7‰ and δ 18 O mean of −9.3‰ plots on the GMWL. Groundwater was induced by precipitation recharging from high altitude regions.…”

Section: Origin Of Hot Spring Watermentioning

confidence: 99%

“…The fault zone subvertical conductors of the XJF were interpreted to represent fault damage zones that formed by strike-slip faulting/shearing along the faults and filled with deeply sourced magmatic and/or metamorphic fluids. The lower crust is broadly characterized by enhanced conductivity and likely associated with partial melting at high temperatures [18,72,88,89]. Additionally, the XJF is characterized by moderately high total strain rates and low 3 He/ 4 He values (mostly <0.10 RA), suggesting that crustal He degassing dominates such fault regions [35].…”

Section: The Hydrogeochemical Circulation Model Of Hot Spring Waters In Xiaojiang Faultmentioning

confidence: 99%

See 4 more Smart Citations

Hydrogeochemical Characteristics of Hot Springs and Their Short-Term Seismic Precursor Anomalies along the Xiaojiang Fault Zone, Southeast Tibet Plateau

Zhou

Yan

et al. 2021

Water

View full text Add to dashboard Cite

Significant hydrogeochemical changes may occur prior- and post-earthquakes. The Xiaojiang fault zone (XJF), situated in a highly deformed area of the southeastern margin of the Tibetan Plateau, is one of the active seismic areas. In this study, major and trace elements, and hydrogen and oxygen isotopes of 28 sites in hot springs along the XJF were investigated from June 2015 to April 2019. The meteoric water acts as the primary water source of the hot spring in the XJF and recharged elevations ranged from 1.8 to 4.5 km. Most of the hot spring water in the study area was immature water and the water–rock reaction degree was weak. The temperature range was inferred from an equation based on the SiO2 concentration and chemical geothermal modeling: 24.3~96.0 °C. The circulation depth for the springs was estimated from 0.45 to 4.04 km. We speculated the meteoric water firstly infiltrated underground and became heated by heat sources, and later circulated to the earth’s surface along the fault and fracture and finally constituted hot spring recharge. Additionally, a continuous monitoring was conducted every three days in the Xundian hot spring since April 2019, and in Panxi and Qujiang hot springs since June 2019. There were short-term (4–35 d) seismic precursor anomalies of the hydrochemical compositions prior to the Xundian ML4.2, Dongchuan ML4.2, and Shuangbai ML5.1 earthquakes. The epicentral distance of anomalous sites ranged from 19.1 to 192.8 km. The anomalous amplitudes were all over 2 times the anomaly threshold. The concentrations of Na+, Cl−, and SO42− are sensitive to the increase of stress in the XJF. Modeling on hydrology cycles of hot springs can provide a plausible physicochemical basis to explain geochemical anomalies in water and the hydrogeochemical anomaly may be useful in future earthquake prediction research of the study area.

show abstract

Section: Origin Of Hot Spring Watersupporting

confidence: 80%

Section: Sampling and Analyzing Methodsmentioning

confidence: 99%

Section: The Hydrogeochemical Circulation Model Of Hot Spring Waters In Xiaojiang Faultmentioning

confidence: 99%

Section: Origin Of Hot Spring Watermentioning

confidence: 99%

Section: The Hydrogeochemical Circulation Model Of Hot Spring Waters In Xiaojiang Faultmentioning

confidence: 99%

See 3 more Smart Citations

Hydrogeochemical Characteristics of Hot Springs and Their Short-Term Seismic Precursor Anomalies along the Xiaojiang Fault Zone, Southeast Tibet Plateau

Zhou

Yan

et al. 2021

Water

View full text Add to dashboard Cite

show abstract

Two Unconnected Low-Velocity Zones in the Eastern Boundary of the Sichuan-Yunnan Block Revealed with High-Resolution Ambient Noise Tomography

Fang

Liu

et al. 2023

Pure Appl. Geophys.

View full text Add to dashboard Cite

The Anninghe-Zemuhe-Xiaojiang fault zone (AZXFZ) is an important boundary fault zone on the southeastern margin of the Tibetan Plateau, with frequent strong earthquakes. Previous studies have imaged widespread low-velocity zones in this area. However, there are still many disputes on the connectivity and genesis of the low-velocity zones. In this study, we obtain the Rayleigh wave phase velocity dispersion curves at 4–25-s periods using observations from 378 broadband stations located near the AZXFZ. The new 3D S-wave velocity model has a lateral resolution of about 30 km in 0–35-km depth and is obtained by direct inversion of surface wave dispersion data. The new results clearly image two low-velocity zones and a high-velocity zone in the middle crust of the study region. The low-velocity zone on the western side of the Lijiang-Xiaojinhe fault is related to the eastward flow of crustal material and the movement of the left lateral strike-slip faults in the Tibetan Plateau, while the low-velocity anomaly distributed along the Daliangshan fault and Xiaojiang fault is the superimposition effect of shear heating of the faults and upwelling of mantle material. The uplift of Gongga Shan is a combination of the continuous accumulation of crustal material in the middle and lower crust of the southeastern margin of the Tibetan Plateau as well as the bending and compression of the Sichuan-Yunnan Block and the Xianshuihe-Anninghe fault zone.

show abstract

Structural styles and impact of fault subsidence in the lake fuxian basin and adjacent area

Anees,

Zhang,

Ashraf

et al. 2024

Mar Geophys Res

View full text Add to dashboard Cite

Electrical resistivity structure of the Xiaojiang strike-slip fault system (SW China) and its tectonic implications

Cited by 39 publications

References 63 publications

Hydrogeochemical Characteristics of Hot Springs and Their Short-Term Seismic Precursor Anomalies along the Xiaojiang Fault Zone, Southeast Tibet Plateau

Hydrogeochemical Characteristics of Hot Springs and Their Short-Term Seismic Precursor Anomalies along the Xiaojiang Fault Zone, Southeast Tibet Plateau

Two Unconnected Low-Velocity Zones in the Eastern Boundary of the Sichuan-Yunnan Block Revealed with High-Resolution Ambient Noise Tomography

Structural styles and impact of fault subsidence in the lake fuxian basin and adjacent area

Contact Info

Product

Resources

About