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Article Navigation >  Acta Sedimentologica Sinica  > 2019  >  37(3): 511-518

HUANG Xin, JIAN Xing, ZHANG Wei, HONG DongMing, GUAN Ping, DU JinXue, ZHANG PengFei. Detrital Garnet Geochemistry-based Provenance Analysis and Interpretation: The effect of grain size[J]. Acta Sedimentologica Sinica, 2019, 37(3): 511-518. doi: 10.14027/j.issn.1000-0550.2018.161
Citation: HUANG Xin, JIAN Xing, ZHANG Wei, HONG DongMing, GUAN Ping, DU JinXue, ZHANG PengFei. Detrital Garnet Geochemistry-based Provenance Analysis and Interpretation: The effect of grain size[J]. Acta Sedimentologica Sinica, 2019, 37(3): 511-518. doi: 10.14027/j.issn.1000-0550.2018.161
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Detrital Garnet Geochemistry-based Provenance Analysis and Interpretation: The effect of grain size

doi: 10.14027/j.issn.1000-0550.2018.161
  • 1.

    State Key Laboratory of Marine Environmental Science(Xiamen University), College of Ocean and Earth Science, Xiamen, Fujian 361102, China;

  • 2.

    Ministry of Education Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China;

  • 3.

    School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;

  • 4.

    Pingbei Petroleum Cooperation Development Project Department of Changqing Oilfield Company, Yan'an, Shaanxi 717408, China

Funds:  National Natural Science Foundation of China, No. 41806052;Natural Science Foundation of Fujian Province, No. 2017J05067; Xiamen University Fundamental Research Funds for the Central Universities, No.20720160114; XMU Training Project of Innovation and Enterpreneurship for Undergraduates, No. 2017X0642
  • Received Date: 2018-06-06
  • Rev Recd Date: 2018-08-16
  • Publish Date: 2019-06-10
  • Single mineral geochemistry is an important approach for sedimentary provenance analysis and is widely used. Whether grain size compositions of clastic minerals (i.e., hydrodynamic sorting process) affect sedimentary provenance interpretation is not yet clear, and not enough attention has been given to this issue. In this paper, 680 detrital garnets (0.068-0.557 mm) from the Tertiary sedimentary rocks in the northern Qaidam basin were studied, and the provenance of the detrital garnets with different grain sizes was interpreted based on major element geochemical data. Fe2+ and Mn2+ contents are higher when the grain size of the garnet is between 0.063 mm and 0.125 mm, so the result of sedimentary provenance interpretation is more likely to be from the metamorphism of lower-level amphibolite facies. In the other grains, Ca2+ and Mg2+ contents are higher, and the resulting explanation of provenance is the broad result of low-grade metamorphic facies, intermediate-acidic igneous rocks and eclogite, etc. Different geochemical compositions caused by the difference of grain size of the clastic garnet show the grain size of the detrital garnets, which will affect the geochemistry-based provenance interpretation. Therefore, in the case of single mineral geochemistry-based provenance analysis, concentrating on detrital minerals with certain grain size compositions (0.063-0.125 mm or 0.125-0.25 mm) can eliminate the influence of the hydrodynamic sorting process and help obtain more accurate provenance interpretation results.e
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  • Received:  2018-06-06
  • Revised:  2018-08-16
  • Published:  2019-06-10

Detrital Garnet Geochemistry-based Provenance Analysis and Interpretation: The effect of grain size

doi: 10.14027/j.issn.1000-0550.2018.161
  • 1. State Key Laboratory of Marine Environmental Science(Xiamen University), College of Ocean and Earth Science, Xiamen, Fujian 361102, China;
  • 2. Ministry of Education Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China;
  • 3. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;
  • 4. Pingbei Petroleum Cooperation Development Project Department of Changqing Oilfield Company, Yan'an, Shaanxi 717408, China
Funds:  National Natural Science Foundation of China, No. 41806052;Natural Science Foundation of Fujian Province, No. 2017J05067; Xiamen University Fundamental Research Funds for the Central Universities, No.20720160114; XMU Training Project of Innovation and Enterpreneurship for Undergraduates, No. 2017X0642
  • Received Date: 2018-06-06
  • Rev Recd Date: 2018-08-16
  • Publish Date: 2019-06-10

Abstract: Single mineral geochemistry is an important approach for sedimentary provenance analysis and is widely used. Whether grain size compositions of clastic minerals (i.e., hydrodynamic sorting process) affect sedimentary provenance interpretation is not yet clear, and not enough attention has been given to this issue. In this paper, 680 detrital garnets (0.068-0.557 mm) from the Tertiary sedimentary rocks in the northern Qaidam basin were studied, and the provenance of the detrital garnets with different grain sizes was interpreted based on major element geochemical data. Fe2+ and Mn2+ contents are higher when the grain size of the garnet is between 0.063 mm and 0.125 mm, so the result of sedimentary provenance interpretation is more likely to be from the metamorphism of lower-level amphibolite facies. In the other grains, Ca2+ and Mg2+ contents are higher, and the resulting explanation of provenance is the broad result of low-grade metamorphic facies, intermediate-acidic igneous rocks and eclogite, etc. Different geochemical compositions caused by the difference of grain size of the clastic garnet show the grain size of the detrital garnets, which will affect the geochemistry-based provenance interpretation. Therefore, in the case of single mineral geochemistry-based provenance analysis, concentrating on detrital minerals with certain grain size compositions (0.063-0.125 mm or 0.125-0.25 mm) can eliminate the influence of the hydrodynamic sorting process and help obtain more accurate provenance interpretation results.e

HUANG Xin, JIAN Xing, ZHANG Wei, HONG DongMing, GUAN Ping, DU JinXue, ZHANG PengFei. Detrital Garnet Geochemistry-based Provenance Analysis and Interpretation: The effect of grain size[J]. Acta Sedimentologica Sinica, 2019, 37(3): 511-518. doi: 10.14027/j.issn.1000-0550.2018.161
Citation: HUANG Xin, JIAN Xing, ZHANG Wei, HONG DongMing, GUAN Ping, DU JinXue, ZHANG PengFei. Detrital Garnet Geochemistry-based Provenance Analysis and Interpretation: The effect of grain size[J]. Acta Sedimentologica Sinica, 2019, 37(3): 511-518. doi: 10.14027/j.issn.1000-0550.2018.161
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