Geochemistry of fluids discharged from mud volcanoes in SE Caspian Sea (Gorgan Plain, Iran)
| Autor: | Farhadian Babadi M.[1], Mehrabi B.[1], Tassi F.[2, Cabassi J.[3, Pecchioni E.[2], Shakeri A.[1], Vaselli O.[3 |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
020209 energy
TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY mud volcanoes 0202 electrical engineering electronic engineering information engineering Geochemistry Mud volcanoes fluid geochemistry secondary geochemical processes Gorgan Plain Caspian Sea Iran Geology 02 engineering and technology 010502 geochemistry & geophysics 01 natural sciences 0105 earth and related environmental sciences Mud volcano |
| Zdroj: | International geology review 63 (2021): 437–452. doi:10.1080/00206814.2020.1716400 info:cnr-pdr/source/autori:Farhadian Babadi M.[1], Mehrabi B.[1], Tassi F.[2,3], Cabassi J.[3,2], Pecchioni E.[2], Shakeri A.[1], Vaselli O.[3,2]/titolo:Geochemistry of fluids discharged from mud volcanoes in SE Caspian Sea (Gorgan Plain, Iran)/doi:10.1080%2F00206814.2020.1716400/rivista:International geology review/anno:2021/pagina_da:437/pagina_a:452/intervallo_pagine:437–452/volume:63 |
| DOI: | 10.1080/00206814.2020.1716400 |
| Popis: | A geochemical study was carried out on gas, water and mud samples from four mud volcanoes in Gorgan Plain, SE Caspian Sea (Iran) in order to investigate fluid primary sources and secondary processes controlling fluid chemistry. The chemical composition of light alkanes and the isotopic feature of methane indicated an origin related to a thermogenic source. Gases discharged from Neftlijeh evidenced anaerobic biodegradation processes with addition of secondary microbial methane. Chemical composition of discharged waters revealed two main groups i) brine-type Na+–Cl− waters from Gharenyaregh and Neftlijeh mud volcanoes, which were marked by relatively high Na+/Cl−, B/Cl− and Li/Cl− ratios and low Ca2+/Cl−, Mg2+/Cl− and K+/Cl− ratios, ii) waters from Sofikam and Inche, characterized by relatively low Na+/Cl−, B/Cl− and Li/Cl− ratios and relatively high Ca2+/Cl−, Mg2+/Cl− and K+/Cl− ratios. The chemical and isotopic characteristics of the discharged waters suggest that evaporated Caspian seawater trapped in sediments is likely representing a reliable water source. The maximum formation depth at Gharenyaregh and Neftlijeh mud volcanoes were estimated at about 6 km depth whereas the generation depth of the rest was significantly shallower. Thus, the observed compositional differences can be related to the different depths of the fluid source feeding them. |
| Databáze: | OpenAIRE |
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