Mud volcanism and fluid geochemistry in the Cheleken peninsula, western Turkmenistan

Davide Oppo; Rossella Capozzi; Aman Nigarov; Paltamet Esenov

doi:10.1016/j.marpetgeo.2014.05.009

Mud volcanism and fluid geochemistry in the Cheleken peninsula, western Turkmenistan

Davide Oppo, Rossella Capozzi, Aman Nigarov, Paltamet Esenov

Geology and Geophysics

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

A geological and geochemical study has been carried out to investigate the relationships between major mud volcano structures and deep fluid migration in the Cheleken peninsula, in the South Caspian Basin. The fluid geochemistry allowed the origin and migration of the saline waters and the hydrocarbons to be deduced along with the regional source and reservoir rocks. The emitted waters formed by the mixing of deep highly saline water from the main source rocks of the Maykop Fm with the Caspian-like pore water contained in the Pliocene reservoirs. The water composition is very similar to that emitted by the mud volcanoes in Azerbaijan, allowing comparisons to be done between the reservoirs in the western and eastern sides of the South Caspian Basin. The associated oil is derived from a mixed type II/III kerogen deposited in a sub-oxic marine environment and generated during the early oil window. The oil biomarkers indicate that the source rock is the Maykop Fm., as previously determined for the other areas of the South Caspian Basin.The spontaneous emissions, showing different morphologies, are mainly aligned along normal and transtensive fault systems, which provide effective pathways for rapid fluid ascent from deep reservoirs to the surface. ?? 2014 Elsevier Ltd.

Original language	English
Pages (from-to)	122-134
Number of pages	13
Journal	Marine and Petroleum Geology
Volume	57
DOIs	https://doi.org/10.1016/j.marpetgeo.2014.05.009
Publication status	Published - Nov 2014

Bibliographical note

Acknowledgements
The Authors are indebted with Dr. Barbara Cerasetti, scientific coordinator of the Italian Archaeological Program in Turkmenistan (Dipartimento di Storia, Culture, Civiltà – Università di Bologna – Ministero per gli Affari Esteri – MAE), for the logistical help before and during the field activities in Turkmenistan. Our thanks to the administration of the National Institute of Deserts, Flora and Fauna and to the Turkmenistan Government. Funding was provided by Prof. G. Gabbianelli and by PRIN 2009 grants to Prof. Rossella Capozzi. The authors are grateful to the reviewer Dr. Adriano Mazzini and editor Jonathan Craig for the very helpful suggestions.

Keywords

Fluid geochemistry
Fluid sources
Migration pathway
Mud volcanoes
Western Turkmenistan

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Cite this

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title = "Mud volcanism and fluid geochemistry in the Cheleken peninsula, western Turkmenistan",

abstract = "A geological and geochemical study has been carried out to investigate the relationships between major mud volcano structures and deep fluid migration in the Cheleken peninsula, in the South Caspian Basin. The fluid geochemistry allowed the origin and migration of the saline waters and the hydrocarbons to be deduced along with the regional source and reservoir rocks. The emitted waters formed by the mixing of deep highly saline water from the main source rocks of the Maykop Fm with the Caspian-like pore water contained in the Pliocene reservoirs. The water composition is very similar to that emitted by the mud volcanoes in Azerbaijan, allowing comparisons to be done between the reservoirs in the western and eastern sides of the South Caspian Basin. The associated oil is derived from a mixed type II/III kerogen deposited in a sub-oxic marine environment and generated during the early oil window. The oil biomarkers indicate that the source rock is the Maykop Fm., as previously determined for the other areas of the South Caspian Basin.The spontaneous emissions, showing different morphologies, are mainly aligned along normal and transtensive fault systems, which provide effective pathways for rapid fluid ascent from deep reservoirs to the surface. ?? 2014 Elsevier Ltd.",

keywords = "Fluid geochemistry, Fluid sources, Migration pathway, Mud volcanoes, Western Turkmenistan",

author = "Davide Oppo and Rossella Capozzi and Aman Nigarov and Paltamet Esenov",

note = "Acknowledgements The Authors are indebted with Dr. Barbara Cerasetti, scientific coordinator of the Italian Archaeological Program in Turkmenistan (Dipartimento di Storia, Culture, Civilt{\`a} – Universit{\`a} di Bologna – Ministero per gli Affari Esteri – MAE), for the logistical help before and during the field activities in Turkmenistan. Our thanks to the administration of the National Institute of Deserts, Flora and Fauna and to the Turkmenistan Government. Funding was provided by Prof. G. Gabbianelli and by PRIN 2009 grants to Prof. Rossella Capozzi. The authors are grateful to the reviewer Dr. Adriano Mazzini and editor Jonathan Craig for the very helpful suggestions.",

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N1 - Acknowledgements The Authors are indebted with Dr. Barbara Cerasetti, scientific coordinator of the Italian Archaeological Program in Turkmenistan (Dipartimento di Storia, Culture, Civiltà – Università di Bologna – Ministero per gli Affari Esteri – MAE), for the logistical help before and during the field activities in Turkmenistan. Our thanks to the administration of the National Institute of Deserts, Flora and Fauna and to the Turkmenistan Government. Funding was provided by Prof. G. Gabbianelli and by PRIN 2009 grants to Prof. Rossella Capozzi. The authors are grateful to the reviewer Dr. Adriano Mazzini and editor Jonathan Craig for the very helpful suggestions.

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N2 - A geological and geochemical study has been carried out to investigate the relationships between major mud volcano structures and deep fluid migration in the Cheleken peninsula, in the South Caspian Basin. The fluid geochemistry allowed the origin and migration of the saline waters and the hydrocarbons to be deduced along with the regional source and reservoir rocks. The emitted waters formed by the mixing of deep highly saline water from the main source rocks of the Maykop Fm with the Caspian-like pore water contained in the Pliocene reservoirs. The water composition is very similar to that emitted by the mud volcanoes in Azerbaijan, allowing comparisons to be done between the reservoirs in the western and eastern sides of the South Caspian Basin. The associated oil is derived from a mixed type II/III kerogen deposited in a sub-oxic marine environment and generated during the early oil window. The oil biomarkers indicate that the source rock is the Maykop Fm., as previously determined for the other areas of the South Caspian Basin.The spontaneous emissions, showing different morphologies, are mainly aligned along normal and transtensive fault systems, which provide effective pathways for rapid fluid ascent from deep reservoirs to the surface. ?? 2014 Elsevier Ltd.

AB - A geological and geochemical study has been carried out to investigate the relationships between major mud volcano structures and deep fluid migration in the Cheleken peninsula, in the South Caspian Basin. The fluid geochemistry allowed the origin and migration of the saline waters and the hydrocarbons to be deduced along with the regional source and reservoir rocks. The emitted waters formed by the mixing of deep highly saline water from the main source rocks of the Maykop Fm with the Caspian-like pore water contained in the Pliocene reservoirs. The water composition is very similar to that emitted by the mud volcanoes in Azerbaijan, allowing comparisons to be done between the reservoirs in the western and eastern sides of the South Caspian Basin. The associated oil is derived from a mixed type II/III kerogen deposited in a sub-oxic marine environment and generated during the early oil window. The oil biomarkers indicate that the source rock is the Maykop Fm., as previously determined for the other areas of the South Caspian Basin.The spontaneous emissions, showing different morphologies, are mainly aligned along normal and transtensive fault systems, which provide effective pathways for rapid fluid ascent from deep reservoirs to the surface. ?? 2014 Elsevier Ltd.

KW - Fluid geochemistry

KW - Fluid sources

KW - Migration pathway

KW - Mud volcanoes

KW - Western Turkmenistan

U2 - 10.1016/j.marpetgeo.2014.05.009

DO - 10.1016/j.marpetgeo.2014.05.009

M3 - Article

SN - 0264-8172

VL - 57

SP - 122

EP - 134

JO - Marine and Petroleum Geology

JF - Marine and Petroleum Geology

ER -

Mud volcanism and fluid geochemistry in the Cheleken peninsula, western Turkmenistan

Abstract

Bibliographical note

Keywords

UN SDGs

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