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"The Lord Howe Volcanic Complex, Australia: its geochemistry and origin" by Megan L. Williams and Brian G. Jones

The Lord Howe Volcanic Complex (LHVC) is part of a seamount chain associated with the detached continental crust of Zealandia. We present petrographic and geochemical data for the LHVC, including the first reported data for Balls Pyramid and the first trace element data for Lord Howe Island, clarifying the tectonic affiliation and general mantle source characteristics. Classification and discrimination diagrams based on concentrations and ratios of immobile elements, such as rare earth and high field strength elements, Th, Ti, Y, and Mg, show the LHVC comprises transitional to alkali basalts and at least two, and probably three, shield building complexes, consistent with an intraplate tectonic setting. Primitive-mantle normalised trace element patterns, variation in Dy/Yb for a restricted range of Dy/Dy , Zr/Yb > 90, and variations in Zr/Hf and P2O5/TiO2 through the eruptive sequences indicate the mantle source may be a laterally heterogeneous enriched garnet peridotite that has und ....

Balls Pyramid , New South Wales , Lord Howe Island , Lord Howe Volcanic Complex , Lord Howe Seamount , Nriched Mantle , Igneous Petrology , Lord Howe Island , Ord Howe Seamount Chain , Antle Metasomatism , Trace Element Geochemistry ,

Frontiers | Dragonfly Conservation in the Increasingly Stressed African Mediterranean-Type Ecosystems

Frontiers | Dragonfly Conservation in the Increasingly Stressed African Mediterranean-Type Ecosystems
frontiersin.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from frontiersin.org Daily Mail and Mail on Sunday newspapers.

Eastern Cape , South Africa , United Kingdom , Region Flamande , United States , Kwazulu Natal , Castillay Leóp , Mediterranean Sea , Oceans General , South African , Calopteryx Exul Selys , El Kala Nord , Van Beek , Africa Samways , Van Etten , Soleimani Pari , Notulae Odonatologicae , Lindenia Tetraphylla , Calopteryx Exul , Urothemis Edwardsii Selys Libellulidae , Ashraf Vaghefi , Africa Modiba , Iafrique Centrale , Van Wilgen , Maghribian Endemicgomphus , Mohamed Khalil Mellal ,