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作者:François Nauret , Christophe Hémond , René C. Maury ...
来源:[J].LITHOS(IF 3.779), 2012, Vol.146-147, pp.143-151
摘要:Abstract(#br)Four Late Pleistocene magnesian andesites (locally called “bajaites”) from Baja California have been dated by the unspiked K–Ar method and analyzed for major, trace elements and Sr, Nd, Pb, Th and U isotopes. They display very large 230 Th excesses (50% to ...
作者:Tarun C. Khanna , V.V. Sesha Sai , Michael Bizimis ...
来源:[J].Precambrian Research(IF 4.441), 2015, Vol.258, pp.260-277
摘要:Abstract(#br)The ∼2.7 Ga Veligallu greenstone terrane in the eastern Dharwar craton is one of the least studied Neoarchean greenstone belts in India. To our knowledge, there is no published dataset that provides a detailed account of the petrogenetic processes, which culmina...
作者:Mayuko Nishio , Kohki Yoshida
来源:[J].Cretaceous Research(IF 1.63), 2014, Vol.48, pp.39-53
摘要:... Latter chromian spinels can be considered as a record of island arc activity including high Mg-andesite in Early Cretaceous time. Because adequate source rocks of the spinels are elusive near the basin compared with those of detrital garnets and tourmalines, these rocks ar...
作者:Bernard J. Wood , Simon P. Turner
来源:[J].Earth and Planetary Science Letters(IF 4.349), 2009, Vol.283 (1), pp.59-66
摘要:...(#br)When the effects of H 2 O and clinopyroxene undersaturation are added together we obtain a line in Pressure–H 2 O space which describes the conditions under which a given high Mg-andesite could be in equilibrium with a harzburgite residue. Application to rocks from W...
作者:Marion Geißler , Christoph Breitkreuz , Hubert Kiersnowski
来源:[J].International Journal of Earth Sciences(IF 2.261), 2008, Vol.97 (5), pp.973-989
摘要:... The three sub-provinces are: (a) the Mecklenburg–Vorpommern Sub-Province (MVSP) dominated by silica-rich lava domes and subvolcanic intrusions, (b) the Eastern Brandenburg Sub-Province (EBSP) dominated by a Mg-andesite shield volcano complex, which extends into western Pol...

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