Geochemical Characteristics of Cenozoic Jining Basalts of the Western North China Craton: Evidence for the Role of the Lower Crust, Lithosphere, and Asthenosphere in Petrogenesis
The Jining volcanic field located in the southern margin of the Mongolian plateau and the western North China Block consists of four rock types: quartz tholeiite, olivine tholeiite, alkali olivine basalt and basanite. These rocks have a wide range of K-Ar ages from ~36 to < 0.2 Ma. The early volc...
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Springer
2011-01-01
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http://tao.cgu.org.tw/images/attachments/v221p001.pdf
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| author | Kung-Suan Ho Yan Liu Ju-Chin Chen Chen-Feng You Huai-Jen Yang |
| author_facet | Kung-Suan Ho Yan Liu Ju-Chin Chen Chen-Feng You Huai-Jen Yang |
| author_sort | Kung-Suan Ho |
| collection | DOAJ |
| description | The Jining volcanic field located in the southern margin of the Mongolian plateau and the western North China Block consists of four rock types: quartz tholeiite, olivine tholeiite, alkali olivine basalt and basanite. These rocks have a wide range of K-Ar ages from ~36 to < 0.2 Ma. The early volcanism was voluminous and dominated by flood-type fissure eruptions of tholeiites, whereas the later phase was represented by sparse eruptions of basanitic lavas. Thirty-six samples analyzed in this study show a wide range in SiO2 contents from 44% ~ 54%. They all are sodium-rich and high-Ti basalts that, however, show marked isotopic variations between two end-members: (1) tholeiites that have higher 87Sr/86Sr of 0.7048 ~ 0.7052, and lower £`Nd of -0.8 to -2.4 and Pb isotope ratios (206Pb/204Pb of 16.9 ~ 17.2, 207Pb/204Pb of 15.3 ~ 15.4 and 208Pb/204Pb of 37.1 ~ 37.7); and (2) basanites that have lower 87Sr/86Sr of 0.7035 ~ 0.7044, and higher £`Nd of +1.3 to +4.9 and Pb isotope ratios (206Pb/204Pb of 17.7 ~ 18.0, 207Pb/204Pb of 15.4 ~ 15.5 and 208Pb/204Pb of 37.8 ~ 38.2). Alkali olivine basalt that occurs as a subordinate rock type is geochemically similar to the basanites, but isotopically similar to the tholeiites, characterized by the highest 87Sr/86Sr ratio among the three basaltic suites, coupled with a low Nb/U value (~33). |
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| spelling | doaj.art-29255aeea3f3408a9fa414c775b2bf042022-12-22T01:56:20ZengSpringerTerrestrial, Atmospheric and Oceanic Sciences1017-08392311-76802011-01-0122100110.3319/TAO.2010.06.28.01(TT)985Geochemical Characteristics of Cenozoic Jining Basalts of the Western North China Craton: Evidence for the Role of the Lower Crust, Lithosphere, and Asthenosphere in PetrogenesisKung-Suan HoYan LiuJu-Chin ChenChen-Feng YouHuai-Jen YangThe Jining volcanic field located in the southern margin of the Mongolian plateau and the western North China Block consists of four rock types: quartz tholeiite, olivine tholeiite, alkali olivine basalt and basanite. These rocks have a wide range of K-Ar ages from ~36 to < 0.2 Ma. The early volcanism was voluminous and dominated by flood-type fissure eruptions of tholeiites, whereas the later phase was represented by sparse eruptions of basanitic lavas. Thirty-six samples analyzed in this study show a wide range in SiO2 contents from 44% ~ 54%. They all are sodium-rich and high-Ti basalts that, however, show marked isotopic variations between two end-members: (1) tholeiites that have higher 87Sr/86Sr of 0.7048 ~ 0.7052, and lower £`Nd of -0.8 to -2.4 and Pb isotope ratios (206Pb/204Pb of 16.9 ~ 17.2, 207Pb/204Pb of 15.3 ~ 15.4 and 208Pb/204Pb of 37.1 ~ 37.7); and (2) basanites that have lower 87Sr/86Sr of 0.7035 ~ 0.7044, and higher £`Nd of +1.3 to +4.9 and Pb isotope ratios (206Pb/204Pb of 17.7 ~ 18.0, 207Pb/204Pb of 15.4 ~ 15.5 and 208Pb/204Pb of 37.8 ~ 38.2). Alkali olivine basalt that occurs as a subordinate rock type is geochemically similar to the basanites, but isotopically similar to the tholeiites, characterized by the highest 87Sr/86Sr ratio among the three basaltic suites, coupled with a low Nb/U value (~33). http://tao.cgu.org.tw/images/attachments/v221p001.pdf K-Ar datingSr-Nd-Pb isotopePetrogenesisCenozoic Jining basaltsWestern North China Craton |
| spellingShingle | Kung-Suan Ho Yan Liu Ju-Chin Chen Chen-Feng You Huai-Jen Yang Geochemical Characteristics of Cenozoic Jining Basalts of the Western North China Craton: Evidence for the Role of the Lower Crust, Lithosphere, and Asthenosphere in Petrogenesis Terrestrial, Atmospheric and Oceanic Sciences K-Ar dating Sr-Nd-Pb isotope Petrogenesis Cenozoic Jining basalts Western North China Craton |
| title | Geochemical Characteristics of Cenozoic Jining Basalts of the Western North China Craton: Evidence for the Role of the Lower Crust, Lithosphere, and Asthenosphere in Petrogenesis |
| title_full | Geochemical Characteristics of Cenozoic Jining Basalts of the Western North China Craton: Evidence for the Role of the Lower Crust, Lithosphere, and Asthenosphere in Petrogenesis |
| title_fullStr | Geochemical Characteristics of Cenozoic Jining Basalts of the Western North China Craton: Evidence for the Role of the Lower Crust, Lithosphere, and Asthenosphere in Petrogenesis |
| title_full_unstemmed | Geochemical Characteristics of Cenozoic Jining Basalts of the Western North China Craton: Evidence for the Role of the Lower Crust, Lithosphere, and Asthenosphere in Petrogenesis |
| title_short | Geochemical Characteristics of Cenozoic Jining Basalts of the Western North China Craton: Evidence for the Role of the Lower Crust, Lithosphere, and Asthenosphere in Petrogenesis |
| title_sort | geochemical characteristics of cenozoic jining basalts of the western north china craton evidence for the role of the lower crust lithosphere and asthenosphere in petrogenesis |
| topic | K-Ar dating Sr-Nd-Pb isotope Petrogenesis Cenozoic Jining basalts Western North China Craton |
| url |
http://tao.cgu.org.tw/images/attachments/v221p001.pdf
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