Geochemical characteristics of soil radon and carbon dioxide within the Dead Sea Fault and Karasu Fault in the Amik Basin (Hatay), Turkey

Yüce, Galip; Fu, Ching‐Chou; D’Alessandro, W.; Gulbay, A.H.; Lai, Chih‐Wei; Bellomo, S.; Yang, Tsanyao Frank; Italiano, Francesco; Walia, Vivek

doi:10.1016/j.chemgeo.2017.01.003

Cited by 50 publications

(38 citation statements)

References 98 publications

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“…However, both theories have the problem that, except for the river valley, there is no explicitly depressive topography and the sediment thickness is less in the center of the suggested pull-apart basin than in the margin ( [28], Figure 9). This is contrary to what would be expected [34]. Yuce at al.…”

Section: Geofluidscontrasting

confidence: 86%

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Nonvolcanic Carbon Dioxide Emission at Continental Rifts: The Bublak Mofette Area, Western Eger Rift, Czech Republic

et al. 2019

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This study presents the results of gas flux measurements of cold, mantle-derived CO2 release at the Bublák mofette field (BMF), located inside of the N-S directed Počátky Plesná fault zone (PPFZ). The PPFZ is presently seismically active, located in the eastern part of the Cheb Basin, western Eger Rift, Central Europe. The goal of the work was to identify the linkage between tectonics and gas flux. The investigated area has a size of 0,43 km2 in which 1.115 locations have been measured. Besides classical soil CO2 gas flux measurements using the closed chamber method (West Systems), drone-based orthophotos were used in combination with knowledge of plant zonation to find zones of high degassing in the agriculturally unused part of the BMF. The highest observed soil CO2 gas flux is 177.926,17 g m-2 d-1, and the lowest is 0,28 g m-2 d-1. Three statistical methods were used for the calculation of the gas flux: arithmetic mean, kriging, and trans-Gaussian kriging. The average CO2 soil degassing of the BMF is 30 t d-1 for an area of 0,43 km2. Since the CO2 soil degassing of the Hartoušov mofette field (HMF) amounts to 23 t d-1 for an area of 0,35 km2, the average dry degassing values of the BMF and HMF are in the same magnitude of order. The amount of CO2 flux from wet mofettes is 3 t d-1 for the BMF and 0,6 t d-1 for the HMF. It was found that the degassing in the BMF and HMF is not in accordance with the pull-apart basin interpretation, based on the direction of degassing as well as topography and sediment fill of the suggested basins. En-echelon faults inside of the PPFZ act as fluid channels to depth (CO2 conduits). These structures inside the PPFZ show beginning faulting and act as tectonic control of CO2 degassing.

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Section: Geofluidscontrasting

confidence: 86%

“…The proportion of length to width is usually 3 : 1, and they are shown as depressional structures [33]. According to Yuce et al [34], who analyzed degassing in the Amik Basin (SE-Turkey), leakage occurs mainly at the basin sidewall faults.…”

Section: Research Areamentioning

confidence: 99%

Nonvolcanic Carbon Dioxide Emission at Continental Rifts: The Bublak Mofette Area, Western Eger Rift, Czech Republic

et al. 2019

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“…Therefore, the abnormal variations in soil gas CO 2 concentration at wells DHT, HBLG, TJYC, and WFS could be responses to the seismic sequence. The peaks in CO 2 concentration could be attributed to increased contributions of gas from underlying limestones as observed in different geological contexts [24,37].…”

Section: Relationship Between Earthquakes and Soil Gas Chemicalmentioning

confidence: 84%

“…Soil gas anomalies are usually complex as they are subject to multiple influences (atmospheric, biogenic, organic, and from the deep crust and mantle; [11,[22][23][24]) and occasionally their relationships with seismic events may be ambiguous [4,7,25,26]. Accordingly, if the observation of soil gas in fault zones is to become a useful method of fault activity assessment and seismic forecasting, further analysis of their relationships is required and the source identification for soil gas in the seismically active areas is a prerequisite.…”

Section: Introductionmentioning

confidence: 99%

Evidence of Multiple Sources of Soil Gas in the Tangshan Fault Zone, North China

Zhi

Liu

et al. 2019

Geofluids

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The sources of soil gases in the Tangshan fault zone, North China, were discussed, based on the soil gas compositions and isotopic ratios obtained by measurement in the field and sample analysis in the laboratory. Soil gas compositions and isotopic ratios indicate that air (A) end-member, limestone (L) end-member, and sediment (S) end-member are the major end-member components contributing to the soil gas in our study area, with fractional contributions in the range of 2-15 vol.%, 23-36 vol.%, and 62-65 vol.%, respectively, to CO 2 from the gas wells. According to the relationship among the 3 He/ 4 He, average CO 2 concentration, and He concentration of soil gas, the deepest depth the fault cut downward and the most developed fractures in the segment where the Heibeiligong (HBLG) well located were inferred, and the shallower depth the fault cut downward and the more developed fractures in the fault segments where the Weifengshan (WFS), Siwangzhuang (SWZ), Tianjingyice (TJYC), and Douhetai (DHT) wells located were inferred. Significant variations in CO 2 concentration were observed in soil gases sampled in DHT, HBLG, and WFS soil gas wells in concomitance with a local seismic sequence by 2018 confirming for the first time a possible source of carbon dioxide generated in underlying limestones.

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“…Это объясняется тем, что подобные структуры являются путями миграции для природных газов, поднимающихся из глубоких горизонтов земной коры, к которым вблизи поверхности присоединяется и радон. В качестве такихкарьерных для радона -газов выделяются углерод, азот, водород, метан и другие [Etiope, Martinelli, 2002;Elío et al, 2015;Yuce et al, 2017;Kumar et al, 2018;Shuleikin, 2018;Yang et al, 2003].…”

Section: сеть разломных зон северо-восточной части ковыктинского лу пunclassified

Mapping the internal structures of fault zones of the sedimentary cover: a tectonophysical approach applied to interpret TDEM data (Kovykta gas condensate field)

Семинский

Buddo

Бобров

et al. 2019

Geodin. tektonofiz.

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The article presents the results of studying the internal structures of platform fault zones with the use of a new tectonophysical approach to processing and interpretation of electrical exploration data obtained by the transient elec‐ tromagnetic method in the near field zone (TEM). In the study of the central part of the Kovykta gas condensate field (East Siberia, Russia), we applied the ideas of tectonophysics envisaging three stages of fault formation, which determine the three‐membered transverse zoning of a fully formed fault zone. Each subzone is characterized by a certain level of rock disturbance and corresponding electrical conductivity. Based on the analysis of electrical conductivity values, the boundaries can be determined between locations differing by the degrees of rock disturbance of the sedimentary stra‐ tum. Using a map of this parameter, it becomes possible to generally establish the boundaries of fault zones and specify internal subzones. The new approach was applied to assess the electrical conductivity of the reservoirs of the Kovykta field. It is established that there are several zones of faulting in the sedimentary stratum, which have not reached a final stage of development when a single fault plane is formed. Currently, these are zones of increased fracturing and dense occurrence of second‐order ruptures that are typical of platform settings due to their relatively weak tectonic activity. The zones are structurally non‐uniform, as evidenced by rheological layering of the sedimentary cover in the vertical cross‐section. A 3D electrical conductivity model of the largest fault zone in the study area shows alternating segments with more or less developed internal structures. Such segments are confined to layers that differ with respect to frac‐ turing. Exploration and development of hydrocarbon deposits can benefit from 3D modeling of large fault zones with the use of the tectonophysical approach for processing and interpretation of the TEM data. The models can provide addition‐ al arguments for improved decision making about locations for trouble‐free well drilling, as well as for selecting more effective methods for drilling sedimentary strata composed of complex horizontal layers.

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Geochemical characteristics of soil radon and carbon dioxide within the Dead Sea Fault and Karasu Fault in the Amik Basin (Hatay), Turkey

Cited by 50 publications

References 98 publications

Nonvolcanic Carbon Dioxide Emission at Continental Rifts: The Bublak Mofette Area, Western Eger Rift, Czech Republic

Nonvolcanic Carbon Dioxide Emission at Continental Rifts: The Bublak Mofette Area, Western Eger Rift, Czech Republic

Evidence of Multiple Sources of Soil Gas in the Tangshan Fault Zone, North China

Mapping the internal structures of fault zones of the sedimentary cover: a tectonophysical approach applied to interpret TDEM data (Kovykta gas condensate field)

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