Melting in an Archaean mantle plume: heads it's basalts and tails it's komatiites. Nature 339, 697-699.Campbell, I.H., Griffiths, R.W., and Hill, R.I., 1989, Melt- ing in an Archaean mantle plume: Head it's basalts, tail it's komatiites: Nature, v. 339, p. 697-699....
(andesite, volcanic tuff, agglomerate, siliceous tuff and trachyte), associated with the Cretaceous subduction of the Paleo-Pacific plate from the east with magmatism in an extensional tectonic setting (Wu et al., 2005a, 2005b; Zheng, 2009; Zhao and Zheng, 2009; Goss et al., 2010; Yang ...
The highly refractory compositions of diamond inclusion minerals could imply preferential diamond growth in the more reducing parts of the cratonic root, depleted by ultra-hot melting in response to heat plumes from a deeper former boundary layer that vanished at the end of the Archaean13. This ...
In contrast, the higher Al2O3/TiO2, lower (Gd/Yb)N, for Gadwal boninites in combination with negative Nb, Zr, Hf, Ti anomalies and lower Cu/Pd at relatively higher Pd/Ir and Pd concentrations reflect high degree melting of refractory mantle wedge under hydrous conditions in an intra...
(EDR) in the early Earth (Fig.1); (2) EER remained isolated until the present; (3) and ASE formed as a mixture of the EDR and an intact region in the mantle. Based on these assumptions, the difference between the Sm/Nd ratios of the EDR and CHUR during formation of the EER can...
In Iceland, the interaction between a mantle plume and the mid-Atlantic ridge gives rise to an anomalously (Archaean-like) high geothermal gradient resulting in thick basaltic crust able to melt at shallow depth. Even in this favorable context though, the characteristic Archaean TTG trace element...
N-MORBIn order to understand the melting processes that occur within recycled oceanic crust and mantle in a heterogeneous plume (e.g., that beneath the Hawaiian Islands), a series of high-pressure-high-temperature layered experiments were performed at 2.9 GPa, 5 GPa, and 8 GPa, from 1300掳...
PlumePeridotiteEvolutionKomatiites are ultramafic volcanic rocks containing more than 18 per cent MgO (ref. 1) that erupted mainly in the Archaean era (more than 2.5 gigayears ago). Although such compositions occur in later periods of Earth history (for example, the Cretaceous komatiites of ...
Archaean continental crust formed from mafic cumulates Open access Mantle plume and rift-related volcanism during the evolution of the Rio Grande Rise Open access07 February 2022 Introduction Deciphering the petrogenesis of granitic rocks has important implications for the understanding of the growth of...