Gypsiferous carbonates at Honaz Dağı (Denizli): First documentation of Triassic gypsum in western Turkey and its tectonic significance

Gündoğan, İbrahim; Helvacı, Cahit; Sözbi̇li̇r, Hasan

doi:10.1016/j.jseaes.2007.09.005

Cited by 37 publications

(20 citation statements)

References 61 publications

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“…Meteoric water can mix with for example karstic water, and form corrosive fluids that enhance carbonate dissolution. Strontium isotope analyses, both on bulk samples and crystalline cement bands have shown that the Lycian nappes (Mesozoic) are a likely candidate as source rock in the Ballık area Gündo gan et al, 2008;Kele et al, 2011). Surfacing along normal faults of CO 2 -rich, thermal fluids results in the precipitation of travertines (Goldscheider et al, 2010;Nador, 1993;Sierralta et al, 2010).…”

Section: Geological Settingmentioning

confidence: 99%

Acoustic properties in travertines and their relation to porosity and pore types

Soete

Kleipool

Claes

et al. 2015

Marine and Petroleum Geology

105

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Sonic velocities of Pleistocene travertines were measured under variable confining pressures. Combined with petrographical characteristics and petrophysical data, i.e. porosity, permeability and density, it was determined that travertine porosity, pore types and cementation control compressional-wave (V p ) and shear-wave velocity (V s ). At 40 MPa confining pressures, V p ranges between 3695 and 6097 m/s and V s between 2037 and 3140 m/s. Velocity variations in travertines are, as with all carbonates, primarily linked to sample heterogeneity, i.e. differences in fabric, texture and porosity. They thus not necessarily emanate from changes in mineralogy or composition. Body wave velocities have a positive correlation with sample density and an inverse correlation with porosity. The travertines, sampled in extensional settings with normal faulting activity, define a specific compressional-wave velocity (y-axis) versus porosity (x-axis) equation, i.e. (log(y) ¼ À0.0048x þ 3.7844) that differs from the V p -porosity paths defined by marine carbonates. Acoustic wave velocities are higher for travertines than for marine carbonates. Travertine precipitates form rigid rock frames, often called framestone, with large primary pores. Marine carbonates on the other hand often consist of (cemented) transported sediments, resulting in a rock frame that permits slower wave propagation when compared to the continental limestones.Acoustic velocity variations are linked to variations in pore types. Mouldic pores (macropores) show faster wave propagation than expected from their total porosities. Microporosity, interlaminar and interpeloidal porosity result in slower acoustic velocities. Framework pores and micro-moulds are associated with lowered acoustic velocities, while vug porosity is found above, on and below the general velocity-porosity trend. Not only the pore type, but also pore shapes exert control on body wave velocities. Cuboid-and rod-like pore shapes increase the velocity, while plate-and blade-like pore shapes have a negative effect on the velocity. The study demonstrates how seismic sections in travertine systems can contain seismic reflections that are not caused by non-carbonate intercalations, but relate to geobody boundaries, in which the seismic expression is function of porosity, pore types and shapes. This study provides and relates petrophysical data, i.e. porosity, permeability and acoustic velocities of travertines and is of importance for the interpretation of seismic reflection data in subsurface continental carbonate reservoirs.

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Section: Geological Settingmentioning

confidence: 99%

Acoustic properties in travertines and their relation to porosity and pore types

Soete

Kleipool

Claes

et al. 2015

Marine and Petroleum Geology

105

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“…The Honaz Fault Zone is a 15 km-long north-facing steplike normal fault that bounds the southern margin of the modern graben ( Figure 2) (Aydan, Kumsar, & Tano, 2005;Bozkuş et al, 2001;Gündoğan, Helvacı, & Sözbilir, 2008;Okay, 1989;Özkul et al, 2013;Koçyiğit, 2005;Kaymakcı, 2006). The northward arched structure exhibits prominent Quaternary fault scarps and significant morphological variations along the mountain front.…”

Section: Honaz Faultmentioning

confidence: 99%

Tectonic analysis of the Honaz Fault (western Anatolia) using geomorphic indices and the regional implications

Özkaymak

2014

Geodinamica Acta

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Honaz Dağı (Honaz Mountain, Denizli) is the highest peak in western Anatolia (2517 m) and represents the southern margin of the Denizli Graben Horst System in the western Anatolia Extensional Province. Honaz Fault is a 2-km-wide, 15-km-long northward arc-shaped dip-slip listric normal fault that bounds the northern margin of Honaz Dağı, and has been formed under an N-S-trending extensional tectonic regime since the early Quaternary. This study uses fieldwork and digital elevation model-based geomorphic analysis to identify the kinematic behaviour of the Honaz Fault. Morphometric indices, such as axial river profiles, drainage basin geometries, triangular facets, mountain-front lineament patterns and sinuosities, document the impact of active tectonics on the evolution of the Honaz Fault and its surroundings, as do valley floor width-to-height ratios and mountain front facet characteristics. These neotectonic indices suggest a relatively high degree of tectonic activity along the Honaz Fault, and suggest that the Quaternary landscape evolution of Honaz Dağı was governed by structural and climate-related erosional processes. Combined geomorphic indices and field data suggest that the analysed dip-slip normal fault segments of the Honaz Fault are linear and highly active, and could generate earthquakes with magnitudes of 6.7. Morphometric analyses of the fault trace along the mountain front yield minimum slip rates of .15-.38 mm/y for the Honaz Fault, which are similar to slip rates calculated for active normal faults in the Aegean region.

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“…The metasediments of the Menderes Massif that have undergone high pressure metamorphism are now gneisses, marbles, schists and recrystallized limestones. The allochthonous Lycian Nappes are composed of limestone, dolomite, gypsum and turbiditic sandstones, overlain by ophiolites (Gündoğan et al ., ).…”

Section: Geological Settingmentioning

confidence: 97%

Sedimentology of coexisting travertine and tufa deposits in a mounded geothermal spring carbonate system, Obruktepe, Turkey

et al. 2017

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The recent discoveries of deeply buried Cretaceous reservoir bodies in the Atlantic Ocean revealed that relationships between the distribution of spring carbonate deposits and faults are poorly understood. The well‐exposed Quaternary deposits at Obruktepe (Denizli Basin, Turkey) provide an opportunity to reconstruct the three‐dimensional sedimentary architecture of such a system. Integration of sedimentological, lithofacies and geochemical analyses reveals complexity in the lateral relationships between sedimentary environments, faults and geothermal spring carbonates. Five environmental systems are distinguished based on the lithofacies analysis: (i) vent; (ii) smooth slope; (iii) travertine‐terrace; (iv) tufa‐barrage; and (v) flood systems. Encrusting, baffling and settling sedimentary processes are reflected in data acquired at several scales, from lithofacies observations to the morphology and arrangement of geobodies, together with microfabrics and stable carbon and oxygen isotope data. Mean values of +4·9‰ δ13C and −8·74‰ δ18O Vienna PeeDee Belemnite reflect geothermal circulation of springwaters. The environmental distribution and lithofacies indicate a lateral continuum between travertine and tufa deposits within this hot spring system. This finding supports two depositional models in which water flow variation is the main control on both CaCO3 precipitation and the resulting formation of travertine and tufa. The proposed models address the factors responsible for the development of these complex mound‐shaped carbonate spring deposits, and how they are related to fluid circulation at depth and in association with faults.

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Gypsiferous carbonates at Honaz Dağı (Denizli): First documentation of Triassic gypsum in western Turkey and its tectonic significance

Cited by 37 publications

References 61 publications

Acoustic properties in travertines and their relation to porosity and pore types

Acoustic properties in travertines and their relation to porosity and pore types

Tectonic analysis of the Honaz Fault (western Anatolia) using geomorphic indices and the regional implications

Sedimentology of coexisting travertine and tufa deposits in a mounded geothermal spring carbonate system, Obruktepe, Turkey

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