List of Articles Stable isotope

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  1 - Pale environment modeling using carbon and oxygen stable isotopes in cement and pedogenic carbonates (Case study: Saqqez river basin)
  Zahra HashemiDehaghi bahareh osanlou  
  have been used as an important tool in paleoenvironment indices reconstruction including temperature, effective precipitation and atmospheric carbonate gas concentration during carbonate formation and determining vegetation history and geomorphic processes. In view of t More

  have been used as an important tool in paleoenvironment indices reconstruction including temperature, effective precipitation and atmospheric carbonate gas concentration during carbonate formation and determining vegetation history and geomorphic processes. In view of this, 16 samples including eight samples of paleosols horizon pedogenic carbonate and eight samples of river conglomerate carbonate cements were collected to measure of carbon and oxygen stable isotope composites. The low values of δ18O showed that the air temperature during carbonates formation was 7.9 ˚C which was cooler ca. 5.5 ˚C compared to current air temperature. The δ13C value during formation of pedogenic carbonates and soil profile evolution showed that C4 vegetation is dominated that means the ecosystems with C4 dominate vegetation have growth period in warm season and considerable moisture stress. The correlation between δ18O and δ13C values was higher in pedogenic carbonates demonstrating precipitation water and CO2 in soil (vegetation reparation ratio) are main controlling factor of these values however, in cement carbonates as well as precipitation water and CO2, groundwater, organism and primary carbonates sources could be affected carbon isotope values. Manuscript profile
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  2 - Water/Rock interaction in Panah-Kuh skarn using carbon and oxygen stable isotopes in different calcite types, west of Yazd
  Azam Zahedi Mohammad Boomeri
  The Panah-Kuh calcic and magnesian skarns are located about 50km northwest of Taft City in Yazd province. Intrusion of Panah-Kuh granodiorite stock with an Oligocene-Miocene age into limestone-dolomite rocks of the Jamal Formation led to the formation of calcic and magn More

  The Panah-Kuh calcic and magnesian skarns are located about 50km northwest of Taft City in Yazd province. Intrusion of Panah-Kuh granodiorite stock with an Oligocene-Miocene age into limestone-dolomite rocks of the Jamal Formation led to the formation of calcic and magnesian skarn in the Panah-Kuh district. Values of δ18O of the granitic rocks and δ18O and δ13C values of the calcite types were determined in this study. Based on these data, δ18O and δ13C values in the studied calcite types are lower than those of sedimentary calcites. These isotopic variations are mainly produced by infiltration of magmatic fluids into carbonate rocks in the Panah-Kuh deposit. Depletetion of the δ18O and δ13C value in the calcite types of Panah-Kuh skarn can be explained by magmatic fluids interaction (δ18O =11.0‰) that interacted with unaltered limestone rocks at 350-450oC with X(〖CO〗_2 ) = 0.05 and water/rock ratio of 25 to 50% .   Manuscript profile
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  3 - Water/Rock interaction in Panah-Kuh skarn using carbon and oxygen stable isotopes in different calcite types, west of Yazd
  Azam Zahedi Mohammad Boomeri
  The Panah-Kuh calcic and magnesian skarns are located about 50km northwest of Taft City in Yazd province. Intrusion of Panah-Kuh granodiorite stock with an Oligocene-Miocene age into limestone-dolomite rocks of the Jamal Formation led to the formation of calcic and magn More

  The Panah-Kuh calcic and magnesian skarns are located about 50km northwest of Taft City in Yazd province. Intrusion of Panah-Kuh granodiorite stock with an Oligocene-Miocene age into limestone-dolomite rocks of the Jamal Formation led to the formation of calcic and magnesian skarn in the Panah-Kuh district. Values of δ18O of the granitic rocks and δ18O and δ13C values of the calcite types were determined in this study. Based on these data, δ18O and δ13C values in the studied calcite types are lower than those of sedimentary calcites. These isotopic variations are mainly produced by infiltration of magmatic fluids into carbonate rocks in the Panah-Kuh deposit. Depletetion of the δ18O and δ13C value in the calcite types of Panah-Kuh skarn can be explained by magmatic fluids interaction (δ18O =11.0‰) that interacted with unaltered limestone rocks at 350-450oC with X(〖CO〗_2 ) = 0.05 and water/rock ratio of 25 to 50% .   Manuscript profile
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  4 - The identification of the recharge source in the important karstic springs of Khuzestan province using stable isotopes (18O and 2H)
  HamidReza Mohammadi-Behzad دکتر اسماعیل کلانتری  Charchi Arash Nadri
  Sabzab and Bibitalkhone Karst springs are the main discharging points of the Kamarun and Pabdeh karstic anticlines (Asmari dolomite and limestone) in Khuzestan province. The exposed surface of both anticlines are not sufficient to feed the aforementioned springs. Accord More

  Sabzab and Bibitalkhone Karst springs are the main discharging points of the Kamarun and Pabdeh karstic anticlines (Asmari dolomite and limestone) in Khuzestan province. The exposed surface of both anticlines are not sufficient to feed the aforementioned springs. According to the general water balance estimation and the discharge hydrographs of springs, there are important water resources in the region (including the Shahid Abbaspour dam reservoir as well as the Shirgun anticline in the vicinity of the host anticlines of springs) which could contribute in feeding the springs. All of water resources in the target (discharge) and the recharge area were sampled during two rainy (February 2013) and dry (July 2013) periods. The origin of the spring's waters in the target area evaluated using these isotope data, as well as the local meteoric water line (LMWL) in the study area. The average elevation of the recharge area and the probable recharge fraction from the water bodies resources in the region estimated for the springs. The results show that the recharge area elevation of the springs in the target area corresponds to the recharge area elevation in the neighboring karstic anticline. It was also revealed that the Shahid Abbaspour dam reservoir participate in recharging the Sabzab spring. However, the volume of input water from the dam reservoir in comparsion to Shirgun karstic catchment is not considerable. Manuscript profile
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  5 - An investigation on sedimentary facies and hydrochemistry characteristics of carbonate deposits in the Ab-e Ask region, Southeast of Damavand volcano
  S.  Rahmani Javanmard Mohsen Ranjbaran V. Amiri
  Calcareous springs of Ab-e Ask are located 85 km northeast of Tehran, in the southern range of the Damavand volcano. Microscopic studies represent the existence of four abiotic and two microbialite facies in the Ab-e Ask travertines. The travertines are the main deposit More

  Calcareous springs of Ab-e Ask are located 85 km northeast of Tehran, in the southern range of the Damavand volcano. Microscopic studies represent the existence of four abiotic and two microbialite facies in the Ab-e Ask travertines. The travertines are the main deposit types of these springs. Based on sedimentation sequence and lithofacies these travertines are categorized as first type (vent and channel), second type (pound, dam, and cascade), and third type (laminated) travertines. On a δ18O versus δ13C plot (VPDB), these travertines are plotted in the oncoid and crystalline crust lithofacies fields. These facies show the character of hydrothermal spring and set the spring in the thermogenic group. Positive values of the Langelier Saturation Index (LSI) for Pashnak, Nadaali, and Zagh springs indicate that these water samples are supersaturated with respect to calcium carbonate, which leads to considerable sedimentation around the springs. In contrast, a negative LSI value at the Sare Pole spring indicates the water is undersaturated with respect to calcium carbonate. Therefore, this spring has a lesser role in travertine deposition compared to the other springs. Also, the position of the samples on the modified Gibbs and Van Wirdum diagrams, suggests that the interaction of water with carbonate and to some extent silicate rocks is considered as the most important source of Ca and Na. Manuscript profile
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  6 - Carbon and oxygen stable isotope study of the Majdar travertine deposits, southeast of Ardabil
  َAli Lotfi Bakhsh
  Freshwater carbonates differ from each other according to isotopic geochemical properties. The study of carbon and oxygen stable isotopes is one of the most important study tools for carbonates, including travertine deposits. In Majdar area, which is located in the west More

  Freshwater carbonates differ from each other according to isotopic geochemical properties. The study of carbon and oxygen stable isotopes is one of the most important study tools for carbonates, including travertine deposits. In Majdar area, which is located in the western Alborz-Azerbaijan tectonic zone, Quaternary travertine deposits are located in the Eocene porphyry andesite volcanic units. Based on mineralogical studies, travertines are mainly composed of aragonite. The mean values of δ13C and δ18O isotopes of travertines in the study area are + 6.47 and -8.77, respectively, which indicates the thermogenic origin of travertines. Also, the mean value of δ13C (CO2) is -2.73, which suggests an inorganic and endogenic origin for CO2. It is thought that CO2-rich hydrothermal fluids have provided the calcium bicarbonate ions needed to form travertine after circulation within the calcareous unit in the area and reacting with it. Then, these fluids ascended through the fault systems and deposited travertine on the surface. Manuscript profile