Helium isotope geochemistry of ultrahigh-pressure metamorphic eclogites;from the Dabie-Sulu terrane in east China | |
Li, YH3; Li, JC; Song, HB; Liu, XC | |
刊名 | ACTA GEOLOGICA SINICA-ENGLISH EDITION |
2000 | |
卷号 | 74期号:1页码:14-18 |
关键词 | eclogites helium isotope Dabie-Sulu terrane |
ISSN号 | 1000-9515 |
英文摘要 | The He-3/He-4 ratios of most eclogites from the Dabie-Sulu terrane range from 0.056 to 0.67 Ra; the data points fall into the mixing part of the crust and the mantle in the He-3-He-4 diagram. The He-3/He-4 ratios of eclogites are obviously correlated with the types of their surrounding rocks. The helium isotope composition of the eclogites from the Bixiling complex possesses characters of mantle-derived rocks with the He-3/He-4 ratio being 5.6 Ra. The He-4 concentration of the eclogites exhibits visible inverse correlation with the delta(18)O value of the quartz in the eclogites from the Sulu area. The delta(18)O values of the eclogites change synchronously with those of the country rocks. Those results suggest that protoliths of the eclogites were basic-ultrabasic rock bodies or veins intruding into the continental crust in the early stage; strong exchange and hybridization between the basic-ultrabasic rocks and continental rocks and the atmospheric water during the intrusion led to abrupt increase of the He-3/He-4 ratios, delta(18)O values and epsilon(Nd)(0) values of the intrusive bodies or veins, which show characters of continental rocks. This indicates that the eclogites are autochthonous. |
学科主题 | 变质岩岩石学 |
WOS关键词 | MOUNTAINS ; ROCKS |
WOS研究方向 | Geology |
语种 | 英语 |
出版者 | GEOLOGICAL SOC CHINA |
WOS记录号 | WOS:000085807700003 |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.197/handle/2HKVOGP0/37386] |
专题 | 中国地质科学院矿产资源研究所 |
作者单位 | 1.Chinese Acad Geol Sci, Inst Mineral Deposits, Beijing, Peoples R China. 2.Chinese Acad Geol Sci, Inst Geomech, Beijing, Peoples R China. 3.中国地质科学院矿产资源研究所 |
推荐引用方式 GB/T 7714 | Li, YH,Li, JC,Song, HB,et al. Helium isotope geochemistry of ultrahigh-pressure metamorphic eclogites;from the Dabie-Sulu terrane in east China[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2000,74(1):14-18. |
APA | Li, YH,Li, JC,Song, HB,&Liu, XC.(2000).Helium isotope geochemistry of ultrahigh-pressure metamorphic eclogites;from the Dabie-Sulu terrane in east China.ACTA GEOLOGICA SINICA-ENGLISH EDITION,74(1),14-18. |
MLA | Li, YH,et al."Helium isotope geochemistry of ultrahigh-pressure metamorphic eclogites;from the Dabie-Sulu terrane in east China".ACTA GEOLOGICA SINICA-ENGLISH EDITION 74.1(2000):14-18. |
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