Carbon-oxygen isotopic covariation of the Changarzeh Pb±Ag deposit (south Natanz): implication on fluid/rock interaction and CO2 degassing processes

Tale Fazel, Ebrahim

doi:10.22071/gsj.2020.240744.1820

Document Type : Original Research Paper

Author

Ebrahim Tale Fazel

Assistant Professor, Department of Geology, Faculty of Science, University of Bu-Ali Sina, Hamedan, Iran

https://doi.org/10.22071/gsj.2020.240744.1820

Abstract

Study of carbon-oxygen isotopic variations in the gangue carbonate minerals and related host rocks has an important role in identifying carbonate hosted lead and zinc deposits and its mechanism of sulfide ore formation. The yellow color dolostone unit attributed to the Shotori Formation with the Middle Triassic age is the main host of sulfide mineralization which deposited on the shale horizon attributed to the Sorkh-Kuh Formation. Galena, sphalerite, pyrite and silver-bearing sulfosalts are the most important sulfide ore minerals in the area, which were formed accompanied with the first (Cal-1) and second (Cal-2) generation calcites. Based on the results of carbon-oxygen isotope data, δ13C and δ18O values in Cal-1 varies from -3.2 to -0.7 ‰ and 12.9 to 14.6 ‰, respectively; and δ13C and δ18O values in Cal-2 varies from -7.3 to -4.4 ‰ and 13.7 to 16.4 ‰, respectively. The carbon-oxygen isotopic composition in the dolostone host rock with compared to calcites has a higher δ13C content (varies between -3.2 to 2.9 ‰) and a wider δ18O range (varies between 22.6 to 28.8 ‰).

Keywords

Main Subjects

Economic Geology

References

References

Barnes, H.L., 1997- Geochemistry of Hydrothermal Ore Deposits. John Wiley and Sons.pp. 750.

Berberian, M., and King, G.C.P., 1981- Towards a paleogeography and tectonic evolution of Iran. Can. J. Earth Sci. 18, 210–265.DOI: 10.1139/e81-019.

Bottinga, Y., 1968- Calculation of fractionation factors for carbon and oxygen isotopic exchange in the system calcite-carbon dioxide-water. The Journal of Physical Chemistry, 72, 800–808.DOI: 10.1016/S0012-821X(68)80012-3.

Demény, A., Ahijado, A., Casillas, R., and Vennemann, T.W., 1998- Crustal contamination and fluid/rock interaction in the carbonatites of Fuerteventura (Canary Islands, Spain): a C, O, H isotope study. Lithos 44, 101–115.DOI: 10.1016/S0024-4937(98)00050-4.

Du, L.J., Li, B., Huang, Z.L., Zhou, J.X., Zou, G.F., and Yan, Z.F., 2017- Carbon-oxygen isotopic geochemistry of the Yangla Cu skarn deposit, SW China: Implications for the source and evolution of hydrothermal fluids. Ore Geology Reviews, 88, 809–821.DOI: 10.1016/j.oregeorev.2017.01.026.

Friedman, L., and O’Neil, J.R., 1977- Compilation of stable isotope fractionation factors of geochemical interest. U.S. Geol. Surv., Prof. Pap. 440-KK.DOI: 10.3133/pp440KK.

Ghorbani, M., 2013- Economic Geology Ore Deposits of Iran. Springer-Verlag, pp. 640.

Hoefs, J., 2015- Stable Isotope Geochemistry. Springer. Seventh edition. pp. 402.

Jiang, S.Y., Ding, Q.F., Yang, S.Y., Zhu, Z.Y., Sun, M.Z., Sun, Y., and Bian, L.Z., 2011- Discovery and significance of carbonate mud mounds from Cu-polymetallic deposits in the Middle and Lower Yangtze metallogenic belt: examples from the Wushan and Dongguashan deposits. Acta Geol. Sin. 85, 744–756. DOI: 10.1016/0016-7037(73)90268-8.

Momenzadeh, M., 1976- Strata-bound lead zinc ores in the lower Cretaceous and Jurassic sediments in the Malayer-Esfahan District (West Central Iran): Lithology, metal content, zonation and Genesis. Unpublished PhD thesis. University of, Heidelberg, Germany, pp. 300.

Ohmoto, H., 1972- Systematics of sulfur and carbon isotopes in hydrothermal ore deposits. Econ. Geol. 67, 551–578.DOI:10.2113/gsecongeo.67.5.551.

O’Neil, J.R., Clayton, R.N., and Mayeda, T.K., 1969- Oxygen isotope fractionation in divalent metal carbonates. Journal of Chemical Physics, 51, 5547–5558. DOI: 10.1063/1.1671982.

Peng, J.T., and Hu, R.Z., 2001- Carbon and oxygen isotope systematics in the Xikuangshan giant antimony deposit, Central Hunan. Geol. Rev. 47, 34–41. DOI: 10.1007/s11430-006-0862-y.

Ray, J.S., Veizer, J., and Davis, W.J., 2003- C, O, Sr and Pb isotope systematics of carbonate sequences of the Vindhyan Supergroup, India: age, diagenesis, correlations and implications for global events. Precambrian Res. 121, 103–140. DOI: 10.1016/S0301-9268(02)00223-1.

Rajabi, A., Rastad, E., and Canet, C., 2012- Metallogeny of Cretaceous carbonate-hosted Zn–Pb deposits of Iran: geotectonic setting and data integration for future mineral exploration. Int. Geol. Rev. 54, 1649–1672.DOI: 10.1080/00206814.2012.659110.

Ren, T., Zhang, X., Han, R., and Hou, B., 2015- Carbon-oxygen isotopic covariations of calcite from Langdu skarn copper deposit, China: implications for sulfide precipitation. Chin. J. Geochem. 34, 21–27.DOI: 10.1007/s11631-014-0014-6.

Spangenberg, J, Fontbot L., Sharp Z.D., and Hunziker. J., 1996- Carbon and oxygen isotope study of hydrothermal carbonates in the zinc-lead deposits of the San Vicente district, central Peru: a quantitative modeling on mixing processes and CO₂ degassing.Chemical Geology 133, 289-315. DOI: 10.1016/S0009-2541(96)00106-4.

Stöcklin, J., 1968- Structural history and tectonics of Iran: a review. Am. Assoc. Pet. Geol. Bull. 52, 1229–1258.

Taylor, S.R., and McLennan, S.M., 1985- The continentalcrust: It’s composition and evolution. Oxford,Blackwell Scientific, 32p. DOI: 10.1002/gj.3350210116.

Taylor Jr., H.P., Frechen, J., and Degens, E.T., 1967- Oxygen and carbon isotope studies of carbonatites from the Laacher See District, West Germany and the Alnö District, Sweden. Geochim. Cosmochim. Acta 31, 407–430.DOI:10.1016/S0009-2541(96)00106-4.

Veizer, J., and Hoefs, J., 1976- The nature of ¹⁸O/¹⁶O and ¹³C/¹²C secular trends in sedimentary carbonate rocks. Geochim. Cosmochim. Acta 40, 1387–1395. DOI: 10.1016/0016-7037(76)90129-0.

Warren, J., 2000- Dolomite: Occurrence, evolution and economically important associations. Earth-Science Review, 52, 1–81.DOI: 10.1016/S0012-8252(00)00022-2.

Zheng, Y.F., and Chen, J.F., 2000- Stable Isotope Geochemistry. Science Press. pp. 340.

Zheng, Y.F., 1990- Carbon-oxygen isotopic covariation in hydrothermal calcite during degassing of CO₂. Mineralium Deposita, 25, 246–250. DOI: 10.1007/BF00198993.

Zheng, Y.F., and Hoefs, J., 1993- Carbon and oxygen isotopic covariations in hydrothermal calcites: theoretical modeling on mixing processes and application to Pb-Zn deposits in the Harz mountains, Germany. Miner. Deposita 28, 79–89. DOI: 10.1007/BF00196332.

Zhou, J.X., Huang, Z.L., Lv, Z.C., Zhu, X.K., Gao, J.G., and Mirnejad, H., 2014- Geology, isotope geochemistry and ore genesis of the Shanshulin carbonate-hosted Pb-Zn deposit, southwest China. Ore Geol. Rev. 63, 209–225. DOI: 10.1016/j.oregeorev.2014.05.012.

Zhou, J.X., Wang, X.C., Wilde, S.A., Luo, K., Huang, Z.L., Wu, T., and Jin, Z.G., 2018- New insights into the metallogeny of MVT Zn-Pb deposits: A case study from the Nayongzhi in South China, using field data, fluid compositions, and in situ S-Pb isotopes. American Mineralogist, 103, 91–108. DOI: 10.2138/am-2018-6238.

Scientific Quarterly Journal of Geosciences

Carbon-oxygen isotopic covariation of the Changarzeh Pb±Ag deposit (south Natanz): implication on fluid/rock interaction and CO2 degassing processes

References

References

Volume 31, Issue 2 - Serial Number 120
Volume 31, Issue 2, Serial Number 120, Summer 2021
September 2021
Pages 163-172

Carbon-oxygen isotopic covariation of the Changarzeh Pb±Ag deposit (south Natanz): implication on fluid/rock interaction and CO2 degassing processes

References

References

Volume 31, Issue 2 - Serial Number 120Volume 31, Issue 2, Serial Number 120, Summer 2021September 2021Pages 163-172

Volume 31, Issue 2 - Serial Number 120
Volume 31, Issue 2, Serial Number 120, Summer 2021
September 2021
Pages 163-172