Early Cretaceous Basalt and Picrite Dykes of the Southern Etendeka Region, NW Namibia: Windows into the Role of the Tristan Mantle Plume in Parana-Etendeka Magmatism期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Early Cretaceous Basalt and Picrite Dykes of the Southern Etendeka Region, NW Namibia: Windows into the Role of the Tristan Mantle Plume in Parana-Etendeka Magmatism

Authors:	THOMPSON, R. N. GIBSON, S. A. DICKIN, A. P. SMITH, P. M.

Affiliation:	¹DEPARTMENT OF GEOLOGICAL SCIENCES, UNIVERSITY OF DURHAM, SOUTH ROAD, DURHAM DH1 3LE, UK ²DEPARTMENT OF EARTH SCIENCES, UNIVERSITY OF CAMBRIDGE, DOWNING STREET, CAMBRIDGE CB2 3EQ, UK ³DEPARTMENT OF GEOLOGY, McMASTER UNIVERSITY, 1280 MAIN STREET WEST, HAMILTON, ONT., CANADA L8S 4M1

Abstract:	Abundant dykes in the southern Etendeka region, NW Namibia,mostly contain 820% MgO. Almost all can be allocatedto previously described Early Cretaceous magma types. Horingbaai-typebasaltspicrites occur up to 120 km inland. Some havesuperficially mid-ocean ridge basalt (MORB)-like compositions:(La/Nb)_n

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