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作者:Cornelia Class , Anton le Roex
来源:[J].Earth and Planetary Science Letters(IF 4.349), 2011, Vol.305 (1), pp.92-102
摘要:Abstract(#br)The DUPAL anomaly in the South Atlantic is present in intra-plate volcanism associated with the Tristan–Gough, Discovery and Shona plumes, and along adjacent sections of the southern Mid-Atlantic Ridge, and has been variably attributed to either shallow continenta...
作者:Maurizio Mazzucchelli , Anna Cipriani , Christophe Hémond ...
来源:[J].LITHOS(IF 3.779), 2016, Vol.248-251, pp.257-271
摘要:Abstract(#br)The sub-continental lithospheric mantle of South America has been known for some time to carry the DUPAL isotope anomaly as seen in volcanics from the Paraná volcanic province. However, this has not allowed discriminating whether the DUPAL anomaly is a primary fea...
作者:Marcel Regelous , Yaoling Niu , Wafa Abouchami ...
来源:[J].LITHOS(IF 3.779), 2009, Vol.112 (1-2), pp.57-72
摘要:...7036) and 208 Pb/ 204 Pb for a given 206 Pb/ 204 Pb ratio, which are characteristics of lavas from the Dupal Anomaly in the South Atlantic, and of many EM-1 type intraplate lavas generally.(#br)Our data place constraints on the origin of the Dupal Anomaly. The enrichments...
作者:Lianxing Wen
来源:[J].Earth and Planetary Science Letters(IF 4.349), 2006, Vol.246 (1), pp.138-148
摘要:... The geochemical DUPAL anomaly maximum in the South Atlantic and Indian Oceans is also shown to geographically coincide with the VLVP boundary when the past plate motions are taken into account. These observations can be explained and related by invoking a mechanism that ...
作者:Xijun Liu , Jifeng Xu , Paterno R. Castillo ...
来源:[J].LITHOS(IF 3.779), 2014, Vol.189, pp.185-200
摘要:Abstract(#br)It has been suggested that the Dupal isotopic anomaly in the mantle can be traced in the Paleozoic ophiolites from the Neo- and Paleo-Tethyan Ocean (275–350 Ma). The Karamaili ophiolite (KO) and Dalabute ophiolite (DO) in the eastern and western corners, respec...
作者:Yoshiro Nishio , Shun’ichi Nakai , Teruaki Ishii ...
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2006, Vol.71 (3), pp.745-759
摘要:Abstract(#br)The DUPAL anomaly, a radiogenic isotope anomaly discovered in the Indian Ocean mantle, has been interpreted as due to a large-scale mantle heterogeneity. To provide new constraints on the DUPAL origin, we analyzed isotope ratios of Li, Sr, and Nd in fresh N-MORB ...
作者:R. Parai , S. Mukhopadhyay , J.J. Standish
来源:[J].Earth and Planetary Science Letters(IF 4.349), 2012, Vol.359-360, pp.227-239
摘要:... In particular, we find low mantle source 40 Ar/ 36 Ar and 129 Xe/ 130 Xe ratios in the eastern region of the study area, which may reflect the noble gas signature of the Dupal mantle domain. Our observations require that the sampled mantle domain either is very ancient (>4.4...
作者:William M. White
来源:[J].Chemical Geology(IF 3.154), 2015, Vol.419, pp.10-28
摘要:...(#br)As the geochemical perspective of the mantle has evolved, so has the geophysical one, and it now reveals a highly heterogeneous lowermost mantle dominated by two large low-shear-wave velocity provinces (LLSVPs) beneath Africa and the South Pacific and associated with the DUPAL...
作者:Cécile Gautheron , Manuel Moreira , Chloé Gerin ...
来源:[J].Chemical Geology(IF 3.154), 2015, Vol.417, pp.163-172
摘要:Abstract(#br)Helium isotopes were measured on 53 glass samples from the South West Indian Ridge from 32 to 68° E. The 4 He/ 3 He ratio is heterogeneous along the SWIR, with values down to 74,000 and up to 114,000 (R/Ra between 9.8 and 6.3), more variable than for helium isot...
作者:Zhen Zhang , Sanzhong Li , Yanhui Suo ...
来源:[J].Geological Journal(IF 1.659), 2016, Vol.51, pp.644-651
摘要:Abstract(#br)The Dupal anomaly has been a frequently discussed feature since it was first proposed three decades ago. We here limit the distribution of the Dupal anomaly based on more than 10 000 Sr–Nd–Pb isotopic composition analyses and classify the anomaly into three ...

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