| Nd—Sr Isotope Geological Study on the Age of Armantai Ophiolite,Xinjiang,China |
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| 摘 要： |
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| 关 键 词： | 钕同位素 锶同位素 新疆 蛇绿岩 成岩时代 等时代年龄 |
Nd-Sr isotope geological study on the age of Armantai ophiolite, Xinjiang, China |
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| Authors: | Xuan Huang Chengwei Jin Baoshan Sun Jun Pan Renhu Zhang |
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| Institution: | (1) Institute of Geology, Chinese Academy of Sciences, 100029 Beijing |
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| Abstract: | Sm-Nd and Rb-Sr whole-rock isochron dating of the samples of cumulated gabbro, diabase and andesitic porphyrite from the Armantai
ophiolite, Xinjiang, yielded the ages of 561 ± 41 Ma (εNd(t) = 6.1) and 392 ± 17 Ma (87Sr/86Sr)i = 0.7041], which stand for the ages of creation and later metamorphism of the ophiolites, respectively. The creation environment
of the Armantai ophiolites seems to a back-arc basin caused by the southward subduction of the palaeo-Asia Ocean.
This project was specially granted by the State under the Key Scientific and Technological Program for the “Eight Five-Year
Plan” period. |
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| Keywords: | ophiolite age Nd-Sr isochron Armantai Xinjiang |
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