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| Content Provider | Springer Nature Link |
|---|---|
| Author | Zhi, Xiachen Peng, Zicheng Chen, Daogong Yu, Chunjiang Sun, Weidong Reisberg, Laurie |
| Copyright Year | 2001 |
| Abstract | The basalt-borne peridotite xenoliths from Jiangsu-Anhui provinces were analyzed for whole rock Os isotopic compositions in two laboratories of USTC, China and CRPG, France, respectively. The$^{187}$Os/$^{188}$Os ratio of the sample set ranges from 0.119 to 0.129 (25 samples, USTC) and from 0.117 to 0.131 (17 samples, CRPG). The Os isotopic compositions of most samples are less than 0.129 and depleted relatively to the primitive mantle, showing a good correlation with the major element compositions. With the$^{187}$Os/$^{188}$Os-Al$_{2}$O$_{3}$ alumichron, the samples yield a model age of 2.5 ± 0.1 Ga (data of USTC) and 1.9 ± 0.1 Ga (data of CRPG), late Archean to early Pro-terozoic. The two samples with the lowest$^{187}$Os/$^{188}$Os ratio (0.119 and 0.117) have the T$_{RD}$ (Re depleted age) of 1.1 Ga (USTC) and 1.4 Ga (CRPG), mid-Proterozoic. The Os isotope model age shows that the peridotite xenoliths from Cenozoic alkali basalt in Jiangsu-Anhui provinces have an old formation age (early- to mid- Proterozoic). They are not newly produced mantle after the Phanerozoic replacement of the lithosphere mantle, but residual fractions of Proterozoic mantle. |
| Starting Page | 1110 |
| Ending Page | 1118 |
| Page Count | 9 |
| File Format | |
| ISSN | 10069313 |
| Journal | Science in China Series D: Earth Sciences |
| Volume Number | 44 |
| Issue Number | 12 |
| e-ISSN | 18622801 |
| Language | English |
| Publisher | Science in China Press |
| Publisher Date | 2001-01-01 |
| Publisher Place | Beijing |
| Access Restriction | Subscribed |
| Subject Keyword | peridotite xenoliths Os isotope model age subcontinental lithospheric mantle Jiangsu-Anhui provinces Geosciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth and Planetary Sciences |
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