Geochemistry and Mantle Potential Temperature of Late Cenozoic Basaltic Rocks from the Northern and Western Continental Margins of the South China Sea

Xiaobo Yuan; Wang Ding

doi:doi:10.11648/j.earth.20200905.14

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Geochemistry and Mantle Potential Temperature of Late Cenozoic Basaltic Rocks from the Northern and Western Continental Margins of the South China Sea

Xiaobo Yuan, Wang Ding

Published in Earth Sciences (Volume 9, Issue 5)

Received: 9 August 2020 Accepted: 25 August 2020 Published: 21 September 2020

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Abstract

Deep dynamic processes of the evolution of the South China Sea (SCS) are recorded by the large-scale magmatism in the SCS and its surrounding regions. The geochemical analysis of whole-rock and olivine phenocryst was conducted on the Late Cenozoic basaltic rocks, which are exposed in the continental margins of the northern (the Leiqiong Area) and western (the Kontum Area) SCS. Consistent geochemical characteristics were shown on the basaltic rocks based on the results, which are similar to OIB from intra-plate environment. Mantle potential temperature (T_p ) was measured by MgO of parental magma compositions and by olivine-liquid equilibria thermometry, with an average of 1489°C beneath the Leizhou Peninsula, 1555°C beneath the Northern Hainan and 1458°C beneath the Kontum Area. Compared with T_p of SCS MORB, the mantle excess temperature is about 78–175°C in the studied areas. The highest excess temperature within typical plume-affected regions. Our results provide the evidence based on temperature for the existence of the Hainan Plume. The data of highest T_p under the North Hainan may indicate the upper reaches of mantle plume. The mantle source of post-spreading magmatism in SCS and its surrounding region is likely to be correlated to that of pre-spreading volcanic activities in the northern continental margins.

Published in	Earth Sciences (Volume 9, Issue 5)
DOI	10.11648/j.earth.20200905.14
Page(s)	178-191
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2020. Published by Science Publishing Group

Keywords

Hainan Plume, Mantle Potential Temperature, Geochemistry, The South China Sea, Post-Spreading

References

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Xiaobo Yuan, Wang Ding. (2020). Geochemistry and Mantle Potential Temperature of Late Cenozoic Basaltic Rocks from the Northern and Western Continental Margins of the South China Sea. Earth Sciences, 9(5), 178-191. https://doi.org/10.11648/j.earth.20200905.14

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Xiaobo Yuan; Wang Ding. Geochemistry and Mantle Potential Temperature of Late Cenozoic Basaltic Rocks from the Northern and Western Continental Margins of the South China Sea. Earth Sci. 2020, 9(5), 178-191. doi: 10.11648/j.earth.20200905.14

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Xiaobo Yuan, Wang Ding. Geochemistry and Mantle Potential Temperature of Late Cenozoic Basaltic Rocks from the Northern and Western Continental Margins of the South China Sea. Earth Sci. 2020;9(5):178-191. doi: 10.11648/j.earth.20200905.14

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@article{10.11648/j.earth.20200905.14,
  author = {Xiaobo Yuan and Wang Ding},
  title = {Geochemistry and Mantle Potential Temperature of Late Cenozoic Basaltic Rocks from the Northern and Western Continental Margins of the South China Sea},
  journal = {Earth Sciences},
  volume = {9},
  number = {5},
  pages = {178-191},
  doi = {10.11648/j.earth.20200905.14},
  url = {https://doi.org/10.11648/j.earth.20200905.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20200905.14},
  abstract = {Deep dynamic processes of the evolution of the South China Sea (SCS) are recorded by the large-scale magmatism in the SCS and its surrounding regions. The geochemical analysis of whole-rock and olivine phenocryst was conducted on the Late Cenozoic basaltic rocks, which are exposed in the continental margins of the northern (the Leiqiong Area) and western (the Kontum Area) SCS. Consistent geochemical characteristics were shown on the basaltic rocks based on the results, which are similar to OIB from intra-plate environment. Mantle potential temperature (Tp ) was measured by MgO of parental magma compositions and by olivine-liquid equilibria thermometry, with an average of 1489°C beneath the Leizhou Peninsula, 1555°C beneath the Northern Hainan and 1458°C beneath the Kontum Area. Compared with Tp  of SCS MORB, the mantle excess temperature is about 78–175°C in the studied areas. The highest excess temperature within typical plume-affected regions. Our results provide the evidence based on temperature for the existence of the Hainan Plume. The data of highest Tp  under the North Hainan may indicate the upper reaches of mantle plume. The mantle source of post-spreading magmatism in SCS and its surrounding region is likely to be correlated to that of pre-spreading volcanic activities in the northern continental margins.},
 year = {2020}
}

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TY  - JOUR
T1  - Geochemistry and Mantle Potential Temperature of Late Cenozoic Basaltic Rocks from the Northern and Western Continental Margins of the South China Sea
AU  - Xiaobo Yuan
AU  - Wang Ding
Y1  - 2020/09/21
PY  - 2020
N1  - https://doi.org/10.11648/j.earth.20200905.14
DO  - 10.11648/j.earth.20200905.14
T2  - Earth Sciences
JF  - Earth Sciences
JO  - Earth Sciences
SP  - 178
EP  - 191
PB  - Science Publishing Group
SN  - 2328-5982
UR  - https://doi.org/10.11648/j.earth.20200905.14
AB  - Deep dynamic processes of the evolution of the South China Sea (SCS) are recorded by the large-scale magmatism in the SCS and its surrounding regions. The geochemical analysis of whole-rock and olivine phenocryst was conducted on the Late Cenozoic basaltic rocks, which are exposed in the continental margins of the northern (the Leiqiong Area) and western (the Kontum Area) SCS. Consistent geochemical characteristics were shown on the basaltic rocks based on the results, which are similar to OIB from intra-plate environment. Mantle potential temperature (Tp ) was measured by MgO of parental magma compositions and by olivine-liquid equilibria thermometry, with an average of 1489°C beneath the Leizhou Peninsula, 1555°C beneath the Northern Hainan and 1458°C beneath the Kontum Area. Compared with Tp  of SCS MORB, the mantle excess temperature is about 78–175°C in the studied areas. The highest excess temperature within typical plume-affected regions. Our results provide the evidence based on temperature for the existence of the Hainan Plume. The data of highest Tp  under the North Hainan may indicate the upper reaches of mantle plume. The mantle source of post-spreading magmatism in SCS and its surrounding region is likely to be correlated to that of pre-spreading volcanic activities in the northern continental margins.
VL  - 9
IS  - 5
ER  -

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Xiaobo Yuan

Institute of Marine Science, Hebei Normal University of Science and Technology, Qinhuangdao, China
Wang Ding

Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan

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Xiaobo Yuan, Wang Ding. (2020). Geochemistry and Mantle Potential Temperature of Late Cenozoic Basaltic Rocks from the Northern and Western Continental Margins of the South China Sea. Earth Sciences, 9(5), 178-191. https://doi.org/10.11648/j.earth.20200905.14

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Xiaobo Yuan; Wang Ding. Geochemistry and Mantle Potential Temperature of Late Cenozoic Basaltic Rocks from the Northern and Western Continental Margins of the South China Sea. Earth Sci. 2020, 9(5), 178-191. doi: 10.11648/j.earth.20200905.14

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Xiaobo Yuan, Wang Ding. Geochemistry and Mantle Potential Temperature of Late Cenozoic Basaltic Rocks from the Northern and Western Continental Margins of the South China Sea. Earth Sci. 2020;9(5):178-191. doi: 10.11648/j.earth.20200905.14

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@article{10.11648/j.earth.20200905.14,
  author = {Xiaobo Yuan and Wang Ding},
  title = {Geochemistry and Mantle Potential Temperature of Late Cenozoic Basaltic Rocks from the Northern and Western Continental Margins of the South China Sea},
  journal = {Earth Sciences},
  volume = {9},
  number = {5},
  pages = {178-191},
  doi = {10.11648/j.earth.20200905.14},
  url = {https://doi.org/10.11648/j.earth.20200905.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20200905.14},
  abstract = {Deep dynamic processes of the evolution of the South China Sea (SCS) are recorded by the large-scale magmatism in the SCS and its surrounding regions. The geochemical analysis of whole-rock and olivine phenocryst was conducted on the Late Cenozoic basaltic rocks, which are exposed in the continental margins of the northern (the Leiqiong Area) and western (the Kontum Area) SCS. Consistent geochemical characteristics were shown on the basaltic rocks based on the results, which are similar to OIB from intra-plate environment. Mantle potential temperature (Tp ) was measured by MgO of parental magma compositions and by olivine-liquid equilibria thermometry, with an average of 1489°C beneath the Leizhou Peninsula, 1555°C beneath the Northern Hainan and 1458°C beneath the Kontum Area. Compared with Tp  of SCS MORB, the mantle excess temperature is about 78–175°C in the studied areas. The highest excess temperature within typical plume-affected regions. Our results provide the evidence based on temperature for the existence of the Hainan Plume. The data of highest Tp  under the North Hainan may indicate the upper reaches of mantle plume. The mantle source of post-spreading magmatism in SCS and its surrounding region is likely to be correlated to that of pre-spreading volcanic activities in the northern continental margins.},
 year = {2020}
}

Copy | Download

TY  - JOUR
T1  - Geochemistry and Mantle Potential Temperature of Late Cenozoic Basaltic Rocks from the Northern and Western Continental Margins of the South China Sea
AU  - Xiaobo Yuan
AU  - Wang Ding
Y1  - 2020/09/21
PY  - 2020
N1  - https://doi.org/10.11648/j.earth.20200905.14
DO  - 10.11648/j.earth.20200905.14
T2  - Earth Sciences
JF  - Earth Sciences
JO  - Earth Sciences
SP  - 178
EP  - 191
PB  - Science Publishing Group
SN  - 2328-5982
UR  - https://doi.org/10.11648/j.earth.20200905.14
AB  - Deep dynamic processes of the evolution of the South China Sea (SCS) are recorded by the large-scale magmatism in the SCS and its surrounding regions. The geochemical analysis of whole-rock and olivine phenocryst was conducted on the Late Cenozoic basaltic rocks, which are exposed in the continental margins of the northern (the Leiqiong Area) and western (the Kontum Area) SCS. Consistent geochemical characteristics were shown on the basaltic rocks based on the results, which are similar to OIB from intra-plate environment. Mantle potential temperature (Tp ) was measured by MgO of parental magma compositions and by olivine-liquid equilibria thermometry, with an average of 1489°C beneath the Leizhou Peninsula, 1555°C beneath the Northern Hainan and 1458°C beneath the Kontum Area. Compared with Tp  of SCS MORB, the mantle excess temperature is about 78–175°C in the studied areas. The highest excess temperature within typical plume-affected regions. Our results provide the evidence based on temperature for the existence of the Hainan Plume. The data of highest Tp  under the North Hainan may indicate the upper reaches of mantle plume. The mantle source of post-spreading magmatism in SCS and its surrounding region is likely to be correlated to that of pre-spreading volcanic activities in the northern continental margins.
VL  - 9
IS  - 5
ER  -

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