Geochemical and Mineral Properties of Quaternary Deep-Sea Sediments in the Central-Tropical Pacific and Its Response to the Mid-Pleistocene Transition

Global climate and oceanic water masses have undergone profound changes during the middle Pleistocene transition; however, due to a lack of foraminiferal fossils, the nonfossiliferous pelagic deposits were less detected in previous reports. In this work, a gravity core from the Kamehameha Basin in t...

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Autores principales:	Haifeng Wang, Liang Yi, Xiguang Deng, Gaowen He
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	magnetostratigraphy clay minerals geochemical properties deep-sea sediments mid-Pleistocene transition Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/73bfc834abb446ceb3020cc780cf1bd6
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spelling	oai:doaj.org-article:73bfc834abb446ceb3020cc780cf1bd62021-11-25T18:04:48ZGeochemical and Mineral Properties of Quaternary Deep-Sea Sediments in the Central-Tropical Pacific and Its Response to the Mid-Pleistocene Transition10.3390/jmse91112542077-1312https://doaj.org/article/73bfc834abb446ceb3020cc780cf1bd62021-11-01T00:00:00Zhttps://www.mdpi.com/2077-1312/9/11/1254https://doaj.org/toc/2077-1312Global climate and oceanic water masses have undergone profound changes during the middle Pleistocene transition; however, due to a lack of foraminiferal fossils, the nonfossiliferous pelagic deposits were less detected in previous reports. In this work, a gravity core from the Kamehameha Basin in the Central Pacific was studied in terms of magnetostratigraphy, clay mineral and geochemical elements. The main results are: (1) nine magnetozones are recognized in the core, which can be correlated to the geomagnetic polarity timescale from chrons C2n to C1n; (2) smectite is the dominant clay mineral, and the others are illite, chlorite and kaolinite; and (3) the sediments are mainly composed of Al<sub>2</sub>O<sub>3</sub>, Fe<sub>2</sub>O<sub>3</sub>, MnO, Na<sub>2</sub>O and TiO<sub>2</sub>. Based on these results, a geochronological framework for the study area was established, and the depositional rates are estimated as 3–7 m/Myr in the Quaternary, showing an increase during the middle Pleistocene transition. By comparing the findings to various paleoenvironmental processes, it is inferred that the increased sedimentation in the Kamehameha Basin may have resulted from the induced weathering processes and the strengthened aeolian inputs from inner Asia. Moreover, regional circulation related to bottom water evolution has experienced a rapid reorganization across the middle Pleistocene transition. All these findings illustrate the potential of deep-sea sediments in the central tropical Pacific in revealing some key features in paleoclimatology and paleoceanography, which are worthy of further investigation in the future.Haifeng WangLiang YiXiguang DengGaowen HeMDPI AGarticlemagnetostratigraphyclay mineralsgeochemical propertiesdeep-sea sedimentsmid-Pleistocene transitionNaval architecture. Shipbuilding. Marine engineeringVM1-989OceanographyGC1-1581ENJournal of Marine Science and Engineering, Vol 9, Iss 1254, p 1254 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	magnetostratigraphy clay minerals geochemical properties deep-sea sediments mid-Pleistocene transition Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
spellingShingle	magnetostratigraphy clay minerals geochemical properties deep-sea sediments mid-Pleistocene transition Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Haifeng Wang Liang Yi Xiguang Deng Gaowen He Geochemical and Mineral Properties of Quaternary Deep-Sea Sediments in the Central-Tropical Pacific and Its Response to the Mid-Pleistocene Transition
description	Global climate and oceanic water masses have undergone profound changes during the middle Pleistocene transition; however, due to a lack of foraminiferal fossils, the nonfossiliferous pelagic deposits were less detected in previous reports. In this work, a gravity core from the Kamehameha Basin in the Central Pacific was studied in terms of magnetostratigraphy, clay mineral and geochemical elements. The main results are: (1) nine magnetozones are recognized in the core, which can be correlated to the geomagnetic polarity timescale from chrons C2n to C1n; (2) smectite is the dominant clay mineral, and the others are illite, chlorite and kaolinite; and (3) the sediments are mainly composed of Al<sub>2</sub>O<sub>3</sub>, Fe<sub>2</sub>O<sub>3</sub>, MnO, Na<sub>2</sub>O and TiO<sub>2</sub>. Based on these results, a geochronological framework for the study area was established, and the depositional rates are estimated as 3–7 m/Myr in the Quaternary, showing an increase during the middle Pleistocene transition. By comparing the findings to various paleoenvironmental processes, it is inferred that the increased sedimentation in the Kamehameha Basin may have resulted from the induced weathering processes and the strengthened aeolian inputs from inner Asia. Moreover, regional circulation related to bottom water evolution has experienced a rapid reorganization across the middle Pleistocene transition. All these findings illustrate the potential of deep-sea sediments in the central tropical Pacific in revealing some key features in paleoclimatology and paleoceanography, which are worthy of further investigation in the future.
format	article
author	Haifeng Wang Liang Yi Xiguang Deng Gaowen He
author_facet	Haifeng Wang Liang Yi Xiguang Deng Gaowen He
author_sort	Haifeng Wang
title	Geochemical and Mineral Properties of Quaternary Deep-Sea Sediments in the Central-Tropical Pacific and Its Response to the Mid-Pleistocene Transition
title_short	Geochemical and Mineral Properties of Quaternary Deep-Sea Sediments in the Central-Tropical Pacific and Its Response to the Mid-Pleistocene Transition
title_full	Geochemical and Mineral Properties of Quaternary Deep-Sea Sediments in the Central-Tropical Pacific and Its Response to the Mid-Pleistocene Transition
title_fullStr	Geochemical and Mineral Properties of Quaternary Deep-Sea Sediments in the Central-Tropical Pacific and Its Response to the Mid-Pleistocene Transition
title_full_unstemmed	Geochemical and Mineral Properties of Quaternary Deep-Sea Sediments in the Central-Tropical Pacific and Its Response to the Mid-Pleistocene Transition
title_sort	geochemical and mineral properties of quaternary deep-sea sediments in the central-tropical pacific and its response to the mid-pleistocene transition
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/73bfc834abb446ceb3020cc780cf1bd6
work_keys_str_mv	AT haifengwang geochemicalandmineralpropertiesofquaternarydeepseasedimentsinthecentraltropicalpacificanditsresponsetothemidpleistocenetransition AT liangyi geochemicalandmineralpropertiesofquaternarydeepseasedimentsinthecentraltropicalpacificanditsresponsetothemidpleistocenetransition AT xiguangdeng geochemicalandmineralpropertiesofquaternarydeepseasedimentsinthecentraltropicalpacificanditsresponsetothemidpleistocenetransition AT gaowenhe geochemicalandmineralpropertiesofquaternarydeepseasedimentsinthecentraltropicalpacificanditsresponsetothemidpleistocenetransition
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Geochemical and Mineral Properties of Quaternary Deep-Sea Sediments in the Central-Tropical Pacific and Its Response to the Mid-Pleistocene Transition

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