Boron content of Lake Ulubat sediment: A key to interpret the morphological history of NW Anatolia, Turkey

Kazancı, Nizamettin; Toprak, Özlem; Leroy, Suzanne A.G.; Öncel, Salim; İleri, Özden; Emre, Ömer; Costa, Pedro; Erturaç, Korhan; McGee, E.J.

doi:10.1016/j.apgeochem.2005.09.003

Cited by 22 publications

(17 citation statements)

References 23 publications

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“…KC‐5 was located at the base of the southern scarp in a small fault‐bounded and sediment‐filled depression at a depth of 1270 m. The pore fluid profiles from these two cores are nearly identical and distinguish themselves from the other basin cores by their unusually high boron content. This is not surprising considering that more than 60% of the world's boron reserves are located in Turkey and much of that is located in the 30,000 km 2 Susurluk Drainage Basin, south of the Sea of Marmara, which drains into the Çınarck Basin [ Kazancı et al , 2006]. These cores also exhibit a shallower sulfate‐methane reaction zone depth than most basin cores.…”

Section: Results and Interpretationsmentioning

confidence: 99%

Pore fluid chemistry of the North Anatolian Fault Zone in the Sea of Marmara: A diversity of sources and processes

Tryon

Henry

Çağatay

et al. 2010

Geochem Geophys Geosyst

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[1] As part of the 2007 Marnaut cruise in the Sea of Marmara, an investigation of the pore fluid chemistry of sites along the Main Marmara Fault zone was conducted. The goal was to define the spatial relationship between active faults and fluid outlets and to determine the sources and evolution of the fluids. Sites included basin bounding transtensional faults and strike-slip faults cutting through the topographic highs. The basin pore fluids are dominated by simple mixing of bottom water with a brackish, low-density Pleistocene Lake Marmara end-member that is advecting buoyantly and/or diffusing from a relatively shallow depth. This mix is overprinted by shallow redox reactions and carbonate precipitation. The ridge sites are more complex with evidence for deep-sourced fluids including thermogenic gas and evidence for both silicate and carbonate diagenetic processes. One site on the Western High displayed two mound structures that appear to be chemoherms atop a deep-seated fluid conduit. The fluids being expelled are brines of up to twice seawater salinity with an exotic fluid chemistry extremely high in Li, Sr, and Ba. Oil globules were observed both at the surface and in cores, and type II gas hydrates of thermogenic origin were recovered. Hydrate formation near the seafloor contributes to increase brine concentration but cannot explain

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Section: Results and Interpretationsmentioning

confidence: 99%

Pore fluid chemistry of the North Anatolian Fault Zone in the Sea of Marmara: A diversity of sources and processes

Tryon

Henry

Çağatay

et al. 2010

Geochem Geophys Geosyst

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“…2002; Kazancı et al 2004Kazancı et al , 2006, only a short summary is given here. Limnological characteristics of Lake Ulubat were first reported based on sampling completed in 1997.…”

Section: Methodsmentioning

confidence: 99%

“…Sampling was conducted again in 2002 and 2004 (Kazancı et al 1998(Kazancı et al , 2006Toprak 2004;Turgut 2005). The water content of the lake sediment was detected in the first survey by the stick-pushing method (Suliman 1998).…”

Section: Methodsmentioning

confidence: 99%

Wind control on the accumulation of heavy metals in sediment of Lake Ulubat, Anatolia, Turkey

et al. 2009

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Freshwater Lake Ulubat (z mean = 1.5-2.0 m and Area = ~138 km 2), NW Anatolia, Turkey was filled in by fine-to-medium-grain silts during the late Holocene. Deposition in Lake Ulubat has been 1.6 cm yr-1 for the last 50 years, but the sedimentation rate over the last ~1,600 years was lower (0.37 mm yr-1). The organic matter and carbonate contents of the infill show cyclic changes that reflect environmental fluctuations. The silt-dominated lithology and the vertically uniform heavy metal distributions are probably due to wind-controlled sedimentation in the lake. Heterogeneous mud, derived from a large, mountainous drainage basin, is deposited in the lake mostly during summer, June to October, when conditions are hot and calm. Winter months are stormier and sediments are re-suspended due to the shallow water depth and the effect of waves on the lake bottom. It is likely that re-suspended sediments, particularly fine-grained particles, together with the heavy metals, are transported out of the lake via the outlet, especially during periods of high lake level. This resuspension and removal process probably caused the lake sediments to become silt-dominated and depleted in heavy metals. The role of broad shallow lakes in sequestering sediments and heavy metals can be described more accurately when wind data are considered. Such information may also be helpful for land-use planning in downstream areas.

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“…The deeper peaks (19-18 cm in core K6.2 and 32-31 cm in core K7.2) very likely represent 1963, the year of maximum fallout from the testing of nuclear weapons (Appleby, 2001). The second peaks (7-6 cm in core K6.2 and 13-12 cm in core K7.2) probably represent 1986, the year of the Chernobyl accident, which affected the study area (UNSCEAR, 1988;Karakelle et al, 2002;Kazancı et al, 2006). Position FIGURE 8…”

Section: Cs and 210 Pbmentioning

confidence: 99%

Palaeolimnology of Lake Sapanca and identification of historic earthquake signals, Northern Anatolian Fault Zone (Turkey)

Schwab

Werner

Dulski³

et al. 2009

Quaternary Science Reviews

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Lake Sapanca is located on a strand of the Northern Anatolian Fault Zone (NAFZ, Turkey), where a series of strong earthquakes (Ms > 6.0) have occurred over the past hundred years. Identifying prehistoric earthquakes in and around Lake Sapanca is key to a the better understanding of plate movements along the NAFZ. This study contributes to the development of palaeolimnological tools to identify past earthquakes in Lake Sapanca. To this end several promising proxies were investigated, specifically lithology, magnetic susceptibility, grain size (thin-section and laser analysis), geochemistry, pollen concentration, diatom assemblages, demonstrates that a combination of indicators can be used to recognize earthquakerelated event layers in cores that encompass a longer period of time.

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Boron content of Lake Ulubat sediment: A key to interpret the morphological history of NW Anatolia, Turkey

Abstract: Freshwater Lake Ulubat (c. 1.5

Cited by 22 publications

References 23 publications

Pore fluid chemistry of the North Anatolian Fault Zone in the Sea of Marmara: A diversity of sources and processes

Pore fluid chemistry of the North Anatolian Fault Zone in the Sea of Marmara: A diversity of sources and processes

Wind control on the accumulation of heavy metals in sediment of Lake Ulubat, Anatolia, Turkey

Palaeolimnology of Lake Sapanca and identification of historic earthquake signals, Northern Anatolian Fault Zone (Turkey)

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