Massive seafloor mounds depict potential for seafloor mineral deposits in the Great South Basin (GSB) offshore New Zealand

Abstract Seafloor mounds are enigmatic features along many continental margins and are often interpreted as gas hydrate pingoes, seep deposits, mud volcanoes, or hydrothermal mounds. When such mounds occur in basins with past volcanic activities, they have the potential to host seafloor metalliferou...

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Autores principales:	Omosanya Kamaldeen Olakunle, Lawal Muhedeen Ajibola, Iqbal H. Muhammad, Yizhaq Makovsky
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e7745485d8054cbc9d583d309f7bf560
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spelling	oai:doaj.org-article:e7745485d8054cbc9d583d309f7bf5602021-12-02T17:15:33ZMassive seafloor mounds depict potential for seafloor mineral deposits in the Great South Basin (GSB) offshore New Zealand10.1038/s41598-021-88620-x2045-2322https://doaj.org/article/e7745485d8054cbc9d583d309f7bf5602021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88620-xhttps://doaj.org/toc/2045-2322Abstract Seafloor mounds are enigmatic features along many continental margins and are often interpreted as gas hydrate pingoes, seep deposits, mud volcanoes, or hydrothermal mounds. When such mounds occur in basins with past volcanic activities, they have the potential to host seafloor metalliferous deposits, which is generally overlooked. Using geophysical datasets, we document the fluid plumbing systems that promoted the formation of seafloor mounds in the Great South Basin (GSB), offshore New Zealand. We also investigate these mounds as potential seafloor metalliferous deposits. Our results reveal 9 seafloor mounds (~ 137 m high) above gigantic (~ 5.4 km high) fluid escape pipes that are associated with deeper crystalline rocks. The structural make-up of the mounds, their geospatial relationships with the pipes and intrusive rocks, and geophysical properties suggest a primary volcanic or hydrothermal origin for the culpable fluids and mounds respectively. Fluids derived from deeper coal beds and shallow foraminiferal oozes in the basin constitute secondary fluid sources focused along polygonal faults and lateral flow cells. A main sub-vertical and minor lateral fluid plumbing patterns are proposed. The relationship between the mounds, pipes, underlying intrusive rocks, and upward routing of mineral-rich fluids could have implications for the formation of ore-grade mineral deposits on the seafloor in the GSB.Omosanya Kamaldeen OlakunleLawal Muhedeen AjibolaIqbal H. MuhammadYizhaq MakovskyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-19 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Omosanya Kamaldeen Olakunle Lawal Muhedeen Ajibola Iqbal H. Muhammad Yizhaq Makovsky Massive seafloor mounds depict potential for seafloor mineral deposits in the Great South Basin (GSB) offshore New Zealand
description	Abstract Seafloor mounds are enigmatic features along many continental margins and are often interpreted as gas hydrate pingoes, seep deposits, mud volcanoes, or hydrothermal mounds. When such mounds occur in basins with past volcanic activities, they have the potential to host seafloor metalliferous deposits, which is generally overlooked. Using geophysical datasets, we document the fluid plumbing systems that promoted the formation of seafloor mounds in the Great South Basin (GSB), offshore New Zealand. We also investigate these mounds as potential seafloor metalliferous deposits. Our results reveal 9 seafloor mounds (~ 137 m high) above gigantic (~ 5.4 km high) fluid escape pipes that are associated with deeper crystalline rocks. The structural make-up of the mounds, their geospatial relationships with the pipes and intrusive rocks, and geophysical properties suggest a primary volcanic or hydrothermal origin for the culpable fluids and mounds respectively. Fluids derived from deeper coal beds and shallow foraminiferal oozes in the basin constitute secondary fluid sources focused along polygonal faults and lateral flow cells. A main sub-vertical and minor lateral fluid plumbing patterns are proposed. The relationship between the mounds, pipes, underlying intrusive rocks, and upward routing of mineral-rich fluids could have implications for the formation of ore-grade mineral deposits on the seafloor in the GSB.
format	article
author	Omosanya Kamaldeen Olakunle Lawal Muhedeen Ajibola Iqbal H. Muhammad Yizhaq Makovsky
author_facet	Omosanya Kamaldeen Olakunle Lawal Muhedeen Ajibola Iqbal H. Muhammad Yizhaq Makovsky
author_sort	Omosanya Kamaldeen Olakunle
title	Massive seafloor mounds depict potential for seafloor mineral deposits in the Great South Basin (GSB) offshore New Zealand
title_short	Massive seafloor mounds depict potential for seafloor mineral deposits in the Great South Basin (GSB) offshore New Zealand
title_full	Massive seafloor mounds depict potential for seafloor mineral deposits in the Great South Basin (GSB) offshore New Zealand
title_fullStr	Massive seafloor mounds depict potential for seafloor mineral deposits in the Great South Basin (GSB) offshore New Zealand
title_full_unstemmed	Massive seafloor mounds depict potential for seafloor mineral deposits in the Great South Basin (GSB) offshore New Zealand
title_sort	massive seafloor mounds depict potential for seafloor mineral deposits in the great south basin (gsb) offshore new zealand
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/e7745485d8054cbc9d583d309f7bf560
work_keys_str_mv	AT omosanyakamaldeenolakunle massiveseafloormoundsdepictpotentialforseafloormineraldepositsinthegreatsouthbasingsboffshorenewzealand AT lawalmuhedeenajibola massiveseafloormoundsdepictpotentialforseafloormineraldepositsinthegreatsouthbasingsboffshorenewzealand AT iqbalhmuhammad massiveseafloormoundsdepictpotentialforseafloormineraldepositsinthegreatsouthbasingsboffshorenewzealand AT yizhaqmakovsky massiveseafloormoundsdepictpotentialforseafloormineraldepositsinthegreatsouthbasingsboffshorenewzealand
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Massive seafloor mounds depict potential for seafloor mineral deposits in the Great South Basin (GSB) offshore New Zealand

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