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Silicon and oxygen isotopic composition of igneous rocks from the eastern Manus Basin

This paper reports silicon and oxygen isotopes of 20 kinds of igneous rocks and their major elements from the eastern Manus Basin. Combining silicon and oxygen isotopic data from other studies, we suppose that both delta super(30)Si and delta super(18)O values increase with the increasing of SiO sub... Full description

Journal Title: Journal of Ocean University of China June 2014, Vol.13(3), pp.421-427
Main Author: Zhao, Huijing
Other Authors: Zeng, Zhigang , Yin, Xuebo , Chen, Shuai
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 1672-5182 ; E-ISSN: 1993-5021 ; DOI: 10.1007/s11802-014-2288-z
Link: http://search.proquest.com/docview/1529934458/?pq-origsite=primo
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title: Silicon and oxygen isotopic composition of igneous rocks from the eastern Manus Basin
format: Article
creator:
  • Zhao, Huijing
  • Zeng, Zhigang
  • Yin, Xuebo
  • Chen, Shuai
subjects:
  • Crystallization
  • Oxygen Isotopes
  • Igneous Rocks
  • Silicon
  • Chemical Composition
  • Hydrothermal Alteration
  • Oxygen Isotope Ratio
  • Major Elements
  • Isew, Bismarck Sea, Manus Basin
  • Marine
  • Tectonics and Crustal Structure
  • Geology and Geophysics
ispartof: Journal of Ocean University of China, June 2014, Vol.13(3), pp.421-427
description: This paper reports silicon and oxygen isotopes of 20 kinds of igneous rocks and their major elements from the eastern Manus Basin. Combining silicon and oxygen isotopic data from other studies, we suppose that both delta super(30)Si and delta super(18)O values increase with the increasing of SiO sub(2) content. It means that the fractionation of silicon and oxygen isotopes are affected by the silica content. The positive correlation between CaO/Al sub(2)O sub(3) ratios and MgO and that between Si/Al and SiO sub(2) content indicate that clinopyroxene is the predominant mineral phase in our samples. We suppose that the fractionation of silicon and oxygen isotopes are influenced by mineral fractional crystallization. Probably, it is due to their different silicon and oxygen bridges. In this study, the delta super(30)S sub(imean value) = -0.17ppt plus or minus 0.17ppt and delta super(18)O sub(mean value) = +6.07ppt plus or minus 0.57ppt are higher than normal delta super(30)Si and delta super(18)O values of mantle, and we propose that these igneous rocks in the eastern Manus Basin are affected by hydrothermal alteration.
language: eng
source:
identifier: ISSN: 1672-5182 ; E-ISSN: 1993-5021 ; DOI: 10.1007/s11802-014-2288-z
fulltext: fulltext
issn:
  • 16725182
  • 1672-5182
  • 19935021
  • 1993-5021
url: Link


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titleSilicon and oxygen isotopic composition of igneous rocks from the eastern Manus Basin
creatorZhao, Huijing ; Zeng, Zhigang ; Yin, Xuebo ; Chen, Shuai
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ispartofJournal of Ocean University of China, June 2014, Vol.13(3), pp.421-427
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subjectCrystallization ; Oxygen Isotopes ; Igneous Rocks ; Silicon ; Chemical Composition ; Hydrothermal Alteration ; Oxygen Isotope Ratio ; Major Elements ; Isew, Bismarck Sea, Manus Basin ; Marine ; Tectonics and Crustal Structure ; Geology and Geophysics
descriptionThis paper reports silicon and oxygen isotopes of 20 kinds of igneous rocks and their major elements from the eastern Manus Basin. Combining silicon and oxygen isotopic data from other studies, we suppose that both delta super(30)Si and delta super(18)O values increase with the increasing of SiO sub(2) content. It means that the fractionation of silicon and oxygen isotopes are affected by the silica content. The positive correlation between CaO/Al sub(2)O sub(3) ratios and MgO and that between Si/Al and SiO sub(2) content indicate that clinopyroxene is the predominant mineral phase in our samples. We suppose that the fractionation of silicon and oxygen isotopes are influenced by mineral fractional crystallization. Probably, it is due to their different silicon and oxygen bridges. In this study, the delta super(30)S sub(imean value) = -0.17ppt plus or minus 0.17ppt and delta super(18)O sub(mean value) = +6.07ppt plus or minus 0.57ppt are higher than normal delta super(30)Si and delta super(18)O values of mantle, and we propose that these igneous rocks in the eastern Manus Basin are affected by hydrothermal alteration.
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abstractThis paper reports silicon and oxygen isotopes of 20 kinds of igneous rocks and their major elements from the eastern Manus Basin. Combining silicon and oxygen isotopic data from other studies, we suppose that both delta super(30)Si and delta super(18)O values increase with the increasing of SiO sub(2) content. It means that the fractionation of silicon and oxygen isotopes are affected by the silica content. The positive correlation between CaO/Al sub(2)O sub(3) ratios and MgO and that between Si/Al and SiO sub(2) content indicate that clinopyroxene is the predominant mineral phase in our samples. We suppose that the fractionation of silicon and oxygen isotopes are influenced by mineral fractional crystallization. Probably, it is due to their different silicon and oxygen bridges. In this study, the delta super(30)S sub(imean value) = -0.17ppt plus or minus 0.17ppt and delta super(18)O sub(mean value) = +6.07ppt plus or minus 0.57ppt are higher than normal delta super(30)Si and delta super(18)O values of mantle, and we propose that these igneous rocks in the eastern Manus Basin are affected by hydrothermal alteration.
doi10.1007/s11802-014-2288-z
urlhttp://search.proquest.com/docview/1529934458/
date2014-06-01