Hydrothermal CO2 degassing in seismically active zones during the late Quaternary

Uysal, I. Tonguç; Feng, Yuexing; Zhao, Jian‐xin; Işık, Veysel; Nuriel, Perach; Golding, Suzanne D.

doi:10.1016/j.chemgeo.2009.05.011

Cited by 154 publications

(155 citation statements)

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“…Carbonate veins of hydrothermal origin, which arise in seismically active geothermal systems of extensional provinces, are ascribed mostly to cold/dry climate events (De Filippis et al, 2012;Uysal et al, 2009). However, this is not universally valid.…”

Section: Hydrothermal and Non-hydrothermal Fracturefilling Veinsmentioning

confidence: 99%

“…For instance, at Pamukkale and Kırşehir geothermal fields of the Turkey, high Sr and δ 13 C values, up to 7392 ppm (Özkul et al, 2013) and +9.2‰ V-PDB of the hydrothermal veins (De Filippis et al, 2012;Uysal et al, 2007Uysal et al, , 2009) have been measured. The Baltaşı travertine mass along the BYS contains in some places fracture-fill veins (Figure 14(d)) that are formed of calcite.…”

Section: Hydrothermal and Non-hydrothermal Fracturefilling Veinsmentioning

confidence: 99%

“…In tectonically active regions, vein formation is widespread and are associated with fluid circulation and fault reactivation (De Filippis et al, 2012;Özkul et al, 2013;Uysal et al, 2009Uysal et al, , 2011Verhaert et al, 2004).…”

Section: Hydrothermal and Non-hydrothermal Fracturefilling Veinsmentioning

confidence: 99%

“…Sampling and analytical procedures 3.1. U-series dating Dating of travertine and associated carbonate veins is important because it places constraints on the timing of tectonic and palaeoseismic activity (Hancock et al 1999;Temiz et al, 2013;Uysal et al, 2007Uysal et al, , 2009 carrier was added. In order to concentrate the U and Th elements from the bulk solution, a Fe(OH) 3 precipitate was created by adding a solution of ammonium hydroxide until obtaining a pH between 7 and 9.…”

Section: Geological Frameworkmentioning

confidence: 99%

“…Consequently, in recent years there has been a significant increase in the number of studies on these precipitates (e.g. Andrews, 2006;Hancock, Chalmers, Altunel, & Çakir, 1999;Jones & Renaut, 2010;Mesci, 2004Mesci, , 2013Özkul, Gökgöz, & Horvatinčić, 2010;Özkul et al, 2013, 2014Pedley, 2009;Uysal et al, 2007Uysal et al, , 2009). Although there is little consensus on the use of the terms travertine and tufa (Capezzuoli, Gandin, & Pedley, 2014;Jones & Renaut, 2010), tufa is herein considered to be a product of CaCO 3 precipitation from cool (near ambient temperature) water regimes that typically contain remains of micro-and macrophytes, invertebrates and bacteria.…”

Section: Introductionmentioning

confidence: 99%

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Travertine occurrences along major strike-slip fault zones: structural, depositional and geochemical constraints from the Eastern Anatolian Fault System (EAFS), Turkey

et al. 2015

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The Eastern Anatolian Fault System (EAFS) is a left-lateral strike-slip fault zone, 30 km wide and 700 km long, that is the second most important neotectonic structure of Turkey. In this study, relationship between travertine precipitation and tectonic activity of some segments along this major strike-slip fault zone has been investigated by a multidisciplinary research. Structural, sedimentological, geochemical and geochronological studies were conducted on several travertine occurrences along the Karlıova-Bingöl segment (KBS) and the Adıyaman Fault Zone (AFZ) of the EAFS. The Baltaşı travertine mass on the AFZ was cross-cut by many extensional fractures that were filled by calcite veins. Geochemical analyses of the calcite veins indicate that some are hydrothermal in origin, whereas others are non-hydrothermal. Hydrothermal circulation in the crust was caused intermittently by the left-lateral strike-slip movements that have oblique-to normal-slip components in both the (KBS) and the (BYS) segments. Our results suggest that, from at least 325 ka until present, tectonic activity was consistently accompanied by travertine deposition. Based on dating of the travertine occurrences in the valley of the Göynük Stream around Hacılar and Elmalı, it is concluded that the NE-trending KBS is currently still active.

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Section: Hydrothermal and Non-hydrothermal Fracturefilling Veinsmentioning

confidence: 99%

Section: Hydrothermal and Non-hydrothermal Fracturefilling Veinsmentioning

confidence: 99%

Section: Hydrothermal and Non-hydrothermal Fracturefilling Veinsmentioning

confidence: 99%

Section: Geological Frameworkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Travertine occurrences along major strike-slip fault zones: structural, depositional and geochemical constraints from the Eastern Anatolian Fault System (EAFS), Turkey

et al. 2015

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Geochemistry of Geologic Sequestration of Carbon Dioxide

Kharaka

Cole

2011

Frontiers in Geochemistry

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Geologic sequestration of carbon dioxide (CO 2 ) is considered one plausible option to reduce greenhouse gases (GHGs) emissions to mitigate global warming and related climate changes. Geochemical studies are essential for providing improved understanding of CO 2 -brine -mineral interactions, which strongly affect storage injectivity and security. Reservoir capacity and integrity are strongly dependent on the four main CO 2 -trapping mechanisms: ' structural ' , ' residual ' , ' solution ' and ' mineral ' . The bulk of CO 2 will be stored initially as a supercritical fl uid, with some rapidly dissolving in formation water, but mineral and additional solution -trapping will be slower, yet more permanent. Results from natural analogues indicate that dissolution in brine is the major sink for CO 2 . Geochemical results from Frio tests (Texas) proved powerful in: (i) tracking the successful injection of CO 2 ; (ii) detecting CO 2 in the overlying ' B ' sandstone; (iii) showing mobilization of metals and organics, and major changes in chemical and isotopic compositions of brine. Modelling and Fe isotopes indicate dissolution of calcite and Fe -oxyhydroxides, and well -pipe corrosion.Geochemical changes, including pH -lowering, alkalinity increases and metals mobilization, were also observed in shallow groundwater following CO 2 injection at the zero -emission research and technology (ZERT) site, Montana. Results show highly sensitive chemical and isotopic tracers that can be used to monitor injection performance, and provide early detection of CO 2 and brine leakages into groundwater.

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Influence of biotic vs abiotic processes on the genesis of non‐marine carbonates along the Cameroon Volcanic Line (Cameroon) and palaeofluid provenance

Bissé

Ekoko

Gerber

et al. 2021

The Depositional Record

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Continental spring carbonates are perfect examples of the interaction of biotic and abiotic processes, and they preserve evidence of the velocity of the flow and the chemical composition of the spring water. This study focuses on non-marine carbonates from fossil and active springs from the Bongongo and Ngol areas along the Cameroon Volcanic Line in South-West Cameroon. Here, hydrothermal fluids reach the surface giving rise to small thermal springs, with temperatures between 31 and 49°C, and streams creating waterfalls, terracettes and barrage carbonate deposits. Petrographic analyses of these carbonates revealed that they are made up of stacked laminae of fibrous coarse crystals of low-Mg calcite and laminae of alternate microsparite and micrite. The fibrous coarsely crystalline calcite, often with feather-like fabric, grows from thin layers of micrite and peloids. Filaments of putative microbial origin are preserved within this peloidal micrite. The laminated microsparite and micrite microfacies is characterised by an intricate mesh of hollow filaments of microbial origin. The long feather-like crystals of calcite formed in fast-flowing water where the enhanced CO 2 degassing has favoured the precipitation of CaCO 3 . The laminated micrite and microsparite, on the other hand, are probably formed in ponds where degassing and CO 2 removal was lower and the calcite precipitation was fostered by microbial activity. The fast-forming carbonates show higher Ce contents and very low total rare earth elements, revealing a preferential uptake of Ce with respect to other rare earth elements. This process would explain the positive or null Ce anomaly in continental spring carbonates elsewhere. The geochemical composition of these carbonates can be used as proxy for the characterisation of fluid/rock interactions between the groundwater and the substratum and for the characterisation of the sources of calcium and other elements that constitute tufa and travertines. The samples from Ngol are characterised by light rare earth element enrichment while those from Bongongo are overall enriched in heavy rare earth elements. Carbonates from both localities have a strong positive Eu anomaly (>4), suggesting a contribution | 103 BISSE Et al.

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Hydrothermal CO2 degassing in seismically active zones during the late Quaternary

Cited by 154 publications

References 67 publications

Travertine occurrences along major strike-slip fault zones: structural, depositional and geochemical constraints from the Eastern Anatolian Fault System (EAFS), Turkey

Travertine occurrences along major strike-slip fault zones: structural, depositional and geochemical constraints from the Eastern Anatolian Fault System (EAFS), Turkey

Geochemistry of Geologic Sequestration of Carbon Dioxide

Influence of biotic vs abiotic processes on the genesis of non‐marine carbonates along the Cameroon Volcanic Line (Cameroon) and palaeofluid provenance

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