Stable isotope geochemistry of Quaternary calcretes in the Mersin area, southern Turkey – A comparison and implications for their origin

Eren, Muhsın

doi:10.1016/j.chemer.2010.12.002

Cited by 26 publications

(16 citation statements)

References 34 publications

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“…Therefore, positive δ 13 C values of lacustrine carbonates, as well as calcretes, indicate precipitation from lake and surface water or groundwater under isotopic equilibrium with atmospheric CO 2 (Botz and Von Der Borch, 1984). Calcretes with positive δ 13 C values indicate a pedogenic environment with low plant respiration and a predominance of C 4 plants (Harrison et al, 1993;Eren, 2011 O values, and these samples show high Ba/Sr values. Therefore, these values are due to increased water depth in the lake, indicating a significant input of most likely surface water that was strongly influenced by the weathering products of ignimbrites with high Ba/Sr values.…”

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Geology, mineralogy, geochemistry, and depositional environment of a Late Miocene/Pliocene fluviolacustrine succession, Cappadocian Volcanic Province, central Anatolia, Turkey

Göz¹,

Kadır²,

Gürel³

et al. 2014

Turkish J Earth Sci

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has been provided concerning the local palaeoclimates, and the effects of the Messinian Salinity Crisis on terrestrial areas surrounding the Mediterranean Sea are currently a matter of discussion. Therefore, the goals of this paper are to describe the mineralogy, geochemistry, and depositional environment of the Late Miocene/Pliocene fluviolacustrine deposits and associated palaeosols and calcretes within the CVP and to interpret the palaeoenvironmental and palaeoclimatic evolution data.

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confidence: 99%

Geology, mineralogy, geochemistry, and depositional environment of a Late Miocene/Pliocene fluviolacustrine succession, Cappadocian Volcanic Province, central Anatolia, Turkey

Göz¹,

Kadır²,

Gürel³

et al. 2014

Turkish J Earth Sci

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Section: Discussionmentioning

confidence: 99%

“…The isotope values of the calcrete samples collected from the hard laminated crust and the nodular and/or tubular horizon, including the fracture infills, are in the range of δ 18 O and δ 13 C for the pedogenic calcretes (Alonso-Zarza, 2003;Bajnóczi et al, 2006;Eren, 2011;Küçükuysal, 2016). Eren (2011) and Küçükuysal (2016) provided worldwide and mainly regional isotopic comparisons of calcretes, respectively. These δ 18 O and δ 13 C values reflect calcrete development under the influence of meteoric water and soil-forming processes, respectively (Purvis and Wright, 1991;Strong et al, 1992;Leone et al, 2000;Alonso-Zarza, 2003;Alonso-Zarza and Arenas, 2004;Eren, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…A great number of studies exist on the different aspects of calcretes in the world and also in Turkey, including isotopic studies (e.g., Cerling, 1984;Andrews et al, 1998;Chiquet et al, 2000;Leone et al, 2000;Srivastava, 2001;Achyuthan, 2003;Nash and McLaren, 2003;Dworkin et al, 2005;Durand et al, 2006;Kovda et al, 2006;Achyuthan et al, 2007;Zhou and Chafetz, 2009;Gallala et al, 2010;Meléndez et al, 2011;Horn et al, 2013;Mortazavi et al, 2013;Elidrissi et al, 2017; literature from Turkey given in Table 1). However, comparative isotopic studies on calcretes are very limited and include worldwide comparisons (Salomons et al, 1978;Talma and Netterberg, 1983;Eren, 2011). The isotope values of Quaternary calcretes from both Adana and Mersin provinces were previously studied by Kaplan et al (2014) and Eren et al (2008).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of stable isotope values of Quaternary calcretes from Adana and Mersin provinces: implications on controlling factors

Eren¹,

Kaplan²,

Kadır³

et al. 2019

Turkish J Earth Sci

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Calcretes are widespread in Adana and Mersin provinces and form under different morphologies. Most calcrete profiles comprise a hard laminated crust/hardpan at the top, gradually intergrading into the nodular and/or tubular/columnar horizon with depth. This study compares the δ 18 O and δ 13 C values of calcretes from both provinces and discusses the controlling factors and environmental conditions. The δ 18 O and δ 13 C values are characteristic for the pedogenic calcretes. The Adana calcrete mean δ 18 O values of the hardpan, nodules and tubes, and fractures-infills are 0.69‰, 0.77‰, and 1.04‰ PDB heavier than those of the Mersin calcretes, respectively. The overall difference between the two groups is 0.78‰ PDB. The differences are related to the high evaporation rate in Adana province in respect to Mersin province under similar climatic conditions, except for the evaporation rate. The high evaporation rate in Adana province is due to higher ventilation. The δ 13 C values of both provinces are almost the same, reflecting calcrete formation in soil with abundant C 3 vegetation similar to contemporary vegetation. In addition, the mean δ 18 O and δ 13 C values of the hardpan calcretes slightly differ from those of the columnar horizon, showing a depletion in heavy isotopes. The depletion in the mean δ 18 O values of hard laminated crust in respect to the columnar horizon is 0.09‰ PDB for Adana calcretes and 0.12‰ PDB for Mersin calcretes. This is related to the relatively thick water film from which the calcretes formed by precipitation and displacive replacement processes. The difference in the mean δ 13 C values is 0.32‰ PDB for the Adana calcretes and 0.11‰ PDB for the Mersin calcretes, and the depletion in δ 13 C values of the hard laminated crust reflects proximity of the bioactive horizon in the soil.

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“…However, much more attention was devoted to the Mediterranean paleosols around Adana and Mersin in the south of Turkey. Paleosols and related calcretes are widespread throughout Turkey, for example, in Southern Anatolia in Adana (Kapur et al 1987(Kapur et al , 1990(Kapur et al , 1993(Kapur et al , 2000Atalay 1996), in Mersin (Eren 2007;Eren et al 2008;Kadir & Eren 2008;Eren & Hatlpoglu-Bagcl 2010;Eren 2011) and in Central Anatolia in Klr ehir (Atabey et al 1998;Gürel & Kadir 2006 in Cappadocia and in Ankara (Küçükuysal 2011 andKüçükuysal et al 2012). The age of the calcretes in Southern Anatolia was determined by ESR and TL (Özer et al 1989;Atalay 1996) and in Central Anatolia by ESR .…”

Section: Introductionmentioning

confidence: 99%

Mineralogical, geochemical and micromorphological evaluation of the Plio-Quaternary paleosols and calcretes from Karahamzall, Ankara (Central Turkey)

Küçükuysal¹,

Kapur²

2014

Geologica Carpathica

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Abstract:We present the mineralogical, micromorphological, and geochemical characteristics of the paleosols and their carbonates from Karahamzall, Ankara (Central Turkey). The paleosols include calcretes of powdery to nodular forms and alternate with channel deposits. The presence of pedofeatures, such as clay cutans, floating grains, circumgranular cracks, MnO linings, secondary carbonate rims, traces of past bioturbation and remnants of root fragments are all the evidence of pedogenesis. Bw is the most common soil horizon showing subangular-angular blocky to granular or prismatic microstructures. Calcretes, on the other hand, are evaluated as semi-mature massive, nodular, tubular or powdery forms. The probable faunal and floral passages may also imply the traces of life from when these alluvial deposits were soil. The presence of early diagenetic palygorskite and dolomite together with high salinization, high calcification and low chemical index of alteration values are evidence of the formation of calcretes under arid and dry conditions. δ 13 C compositions of the carbonates ranging from -7.11 ‰ to -7.74 ‰ VPDB are comformable with the world pedogenic carbonates favouring the C4 vegetation; likely δ 18 O compositions of the carbonates are between -3.97 ‰ and -4.91 ‰ which are compatible with the paleosols formed under the influence of meteroic water in the vadose zone.

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Stable isotope geochemistry of Quaternary calcretes in the Mersin area, southern Turkey – A comparison and implications for their origin

Cited by 26 publications

References 34 publications

Geology, mineralogy, geochemistry, and depositional environment of a Late Miocene/Pliocene fluviolacustrine succession, Cappadocian Volcanic Province, central Anatolia, Turkey

Geology, mineralogy, geochemistry, and depositional environment of a Late Miocene/Pliocene fluviolacustrine succession, Cappadocian Volcanic Province, central Anatolia, Turkey

Comparison of stable isotope values of Quaternary calcretes from Adana and Mersin provinces: implications on controlling factors

Mineralogical, geochemical and micromorphological evaluation of the Plio-Quaternary paleosols and calcretes from Karahamzall, Ankara (Central Turkey)

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