Hayati Koyuncu, PhD | Colorado School of Mines (original) (raw)

Papers by Hayati Koyuncu, PhD

Research paper thumbnail of Spectral Remote Sensing of Anomalous Mineralogy Induced by Hydrocarbon Migration and Uranium Mineralization: San Rafael Swell, Utah, USA

Research paper thumbnail of Landsat Lineament Analysis of the Southern Colorado Front Range

Remote sensing in …, 1989

Research paper thumbnail of Submarine and coastal karstic groundwater discharges along the southwestern Mediterranean coast of Turkey

Hydrogeol J, 2011

A 120 km-long part of the southwestern coast of Turkey, with well-developed karst terrain in cont... more A 120 km-long part of the southwestern coast of Turkey, with well-developed karst terrain in contact with the sea, has been investigated by systematic diving surveys to determine the submarine groundwater discharges (SGDs). The physical, chemical and isotopic data have been used to determine the rate of the fresh groundwater end member (FEM) and its temporal dynamics. About 150 SGDs have been detected by diving surveys employed mostly up to a depth of 30 m below sea level (bsl). Among those, 15 SGDs are in the form of coastal or submarine caves with entrances ranging between sea surface and 40 m bsl. The FEM contribution in SGDs ranges from a few percent to more than 80%. Stable isotope data suggest a range of mean recharge area elevations extending from the coast to more than 1,000 m inland. In many of the SGDs, the FEMs are characterized by tritium-based residence times ranging from recent to several decades. Hypothetical geochemical calculations of mixing between freshwater and seawater end members reveal that more than 45% of freshwater contribution is required for karst development in the SGDs. Models suggest a threshold pH of 7.6 or lower for the carbonate rock dissolution.

Research paper thumbnail of Mineral resources of the San Rafael Swell Wilderness Study Areas, including Muddy Creek, Crack Canyon, San Rafael Reef, Mexican Mountain, and Sids Mountain …

This paper reports on the San Rafael Swell Wilderness Study areas, which includes the Muddy Creek... more This paper reports on the San Rafael Swell Wilderness Study areas, which includes the Muddy Creek, Crack Canyon, San Rafael Reef, Mexican Mountain, and Sids Mountain Wilderness Study Areas, in Emery County, south-central Utah. Within and near the Crack Canyon ...

Research paper thumbnail of LANDSAT LINEAMENT ANALYSIS OF THE SOUTHERN COLORADO FRONT RANGE

Remote sensing in …, 1989

Research paper thumbnail of Remote sensing study for mineral resource appraisal of the San Rafael Swell, Emery County, Utah

Research paper thumbnail of Hydrogeological processes in karst terranes(Antalya, 7-17 October 1990)

Research paper thumbnail of Spectral remote sensing of anomalous mineralogy induced by hydrocarbon migration and uranium mineralization, San Rafael Swell, Utah, USA

ESA, Environment Observation and Climate Modelling …, 1992

Research paper thumbnail of Submarine and coastal karstic groundwater discharges along the southwestern Mediterranean coast of Turkey

Hydrogeology …, 2011

A 120 km-long part of the southwestern coast of Turkey, with well-developed karst terrain in cont... more A 120 km-long part of the southwestern coast of Turkey, with well-developed karst terrain in contact with the sea, has been investigated by systematic diving surveys to determine the submarine groundwater discharges (SGDs). The physical, chemical and isotopic data have been used to determine the rate of the fresh groundwater end member (FEM) and its temporal dynamics. About 150 SGDs have been detected by diving surveys employed mostly up to a depth of 30 m below sea level (bsl). Among those, 15 SGDs are in the form of coastal or submarine caves with entrances ranging between sea surface and 40 m bsl. The FEM contribution in SGDs ranges from a few percent to more than 80%.

Research paper thumbnail of Determination of the origin of the waters of Köyceǧiz Lake, Turkey

Journal of …, 1995

The Köyceǧiz Lake in south-western Turkey is a meromictic lake, comprised of waters of both therm... more The Köyceǧiz Lake in south-western Turkey is a meromictic lake, comprised of waters of both thermal and cold-karstic origin. The lake is principally fed from surface flow, ground water recharge from alluvium and thermal discharges located at the bottom of the lake. As indicated by physical and chemical observations, the lake is composed of two hydrochemically distinct water layers. There is a transition zone between these two layers at a depth of approximately 10 m. The bottom layer, which contains more mineralized water, is recognized easily by the smell of hydrogen sulfide gas. A decrease in pH and dissolved oxygen and an increase in specific conductivity and ionic constituents are observed at the transition zone in depth profiles at all measurement sites throughout the year. The isotopic compositions of the representative observation points widely scatter and indicate the mixing of thermal and cold-karstic waters. As indicated by satellite imagery data, the morphology of the lake shores are primarily controlled by structural elements, which are mostly normal faults. Echo-sounding profiles point out that some of the fault lines, along which the lake bottom springs seem to be located, extend through the lake bottom. Current velocity observations also indicate possible sites of thermal ground water discharges located at the lake bottom.

Research paper thumbnail of Spectral Remote Sensing of Anomalous Mineralogy Induced by Hydrocarbon Migration and Uranium Mineralization: San Rafael Swell, Utah, USA

Research paper thumbnail of Landsat Lineament Analysis of the Southern Colorado Front Range

Remote sensing in …, 1989

Research paper thumbnail of Submarine and coastal karstic groundwater discharges along the southwestern Mediterranean coast of Turkey

Hydrogeol J, 2011

A 120 km-long part of the southwestern coast of Turkey, with well-developed karst terrain in cont... more A 120 km-long part of the southwestern coast of Turkey, with well-developed karst terrain in contact with the sea, has been investigated by systematic diving surveys to determine the submarine groundwater discharges (SGDs). The physical, chemical and isotopic data have been used to determine the rate of the fresh groundwater end member (FEM) and its temporal dynamics. About 150 SGDs have been detected by diving surveys employed mostly up to a depth of 30 m below sea level (bsl). Among those, 15 SGDs are in the form of coastal or submarine caves with entrances ranging between sea surface and 40 m bsl. The FEM contribution in SGDs ranges from a few percent to more than 80%. Stable isotope data suggest a range of mean recharge area elevations extending from the coast to more than 1,000 m inland. In many of the SGDs, the FEMs are characterized by tritium-based residence times ranging from recent to several decades. Hypothetical geochemical calculations of mixing between freshwater and seawater end members reveal that more than 45% of freshwater contribution is required for karst development in the SGDs. Models suggest a threshold pH of 7.6 or lower for the carbonate rock dissolution.

Research paper thumbnail of Mineral resources of the San Rafael Swell Wilderness Study Areas, including Muddy Creek, Crack Canyon, San Rafael Reef, Mexican Mountain, and Sids Mountain …

This paper reports on the San Rafael Swell Wilderness Study areas, which includes the Muddy Creek... more This paper reports on the San Rafael Swell Wilderness Study areas, which includes the Muddy Creek, Crack Canyon, San Rafael Reef, Mexican Mountain, and Sids Mountain Wilderness Study Areas, in Emery County, south-central Utah. Within and near the Crack Canyon ...

Research paper thumbnail of LANDSAT LINEAMENT ANALYSIS OF THE SOUTHERN COLORADO FRONT RANGE

Remote sensing in …, 1989

Research paper thumbnail of Remote sensing study for mineral resource appraisal of the San Rafael Swell, Emery County, Utah

Research paper thumbnail of Hydrogeological processes in karst terranes(Antalya, 7-17 October 1990)

Research paper thumbnail of Spectral remote sensing of anomalous mineralogy induced by hydrocarbon migration and uranium mineralization, San Rafael Swell, Utah, USA

ESA, Environment Observation and Climate Modelling …, 1992

Research paper thumbnail of Submarine and coastal karstic groundwater discharges along the southwestern Mediterranean coast of Turkey

Hydrogeology …, 2011

A 120 km-long part of the southwestern coast of Turkey, with well-developed karst terrain in cont... more A 120 km-long part of the southwestern coast of Turkey, with well-developed karst terrain in contact with the sea, has been investigated by systematic diving surveys to determine the submarine groundwater discharges (SGDs). The physical, chemical and isotopic data have been used to determine the rate of the fresh groundwater end member (FEM) and its temporal dynamics. About 150 SGDs have been detected by diving surveys employed mostly up to a depth of 30 m below sea level (bsl). Among those, 15 SGDs are in the form of coastal or submarine caves with entrances ranging between sea surface and 40 m bsl. The FEM contribution in SGDs ranges from a few percent to more than 80%.

Research paper thumbnail of Determination of the origin of the waters of Köyceǧiz Lake, Turkey

Journal of …, 1995

The Köyceǧiz Lake in south-western Turkey is a meromictic lake, comprised of waters of both therm... more The Köyceǧiz Lake in south-western Turkey is a meromictic lake, comprised of waters of both thermal and cold-karstic origin. The lake is principally fed from surface flow, ground water recharge from alluvium and thermal discharges located at the bottom of the lake. As indicated by physical and chemical observations, the lake is composed of two hydrochemically distinct water layers. There is a transition zone between these two layers at a depth of approximately 10 m. The bottom layer, which contains more mineralized water, is recognized easily by the smell of hydrogen sulfide gas. A decrease in pH and dissolved oxygen and an increase in specific conductivity and ionic constituents are observed at the transition zone in depth profiles at all measurement sites throughout the year. The isotopic compositions of the representative observation points widely scatter and indicate the mixing of thermal and cold-karstic waters. As indicated by satellite imagery data, the morphology of the lake shores are primarily controlled by structural elements, which are mostly normal faults. Echo-sounding profiles point out that some of the fault lines, along which the lake bottom springs seem to be located, extend through the lake bottom. Current velocity observations also indicate possible sites of thermal ground water discharges located at the lake bottom.