East Mariana Basin tholeiites: Cretaceous intraplate basalts or rift basalts related to the Ontong Java plume?

Petrology and Geochemistry of Neogene Continental Basalts and Related Rocks in Northern Taiwan (iii): Alkali Basalts and Tholeiites from Shiting-yinko Area

Basaltic rocks exposed in the Shiting to Yinko area in northern Taiwan are considered to represent a member of the products of the Neogene intraplate volcanism in the Fujian-Taiwan region of the SE China continental margin. This paper presents new age dating, petrographic (including mineral chemistry) and geochemical data which suggest the existence of two groups of the basaltic rocks: the earl...

Flood basalts and hot-spot tracks: plume heads and tails.

Continental flood basalt eruptions have resulted in sudden and massive accumulations of basaltic lavas in excess of any contemporary volcanic processes. The largest flood basalt events mark the earliest volcanic activity of many major hot spots, which are thought to result from deep mantle plumes. The relative volumes of melt and eruption rates of flood basalts and hot spots as well as their te...

Interactions of the Greater Ontong Java mantle plume component with the Osbourn Trough

The Ontong Java-Manihiki-Hikurangi plateau (OJMHP) is considered to have originated from a starting mantle plume, and have been rifted apart by two spreading ridges. However, the ages of these spreading ridges and their possible interactions with the presumed mantle plume are unclear. The Manihiki-Hikurangi plateau has been rifted apart by the Osbourn Trough which formed the southwestern Pacifi...

Emperor Seamounts: Trace Elements in Transitional Tholeiites, Alkali Basalts, and Hawaiites-mantle Homogeneity or Heterogeneity and Magmatic Processes

P. Cambon, Centre Octanologique de Bretagne, CNEXO, B. P. 337, 29273 Brest cedex, France J. L. Joron, Institut de Physique du Globe, 4, place Jussieu, 75230 Paris cedex 05, and Laboratoire P. Sue, Centre d'Etudes Nucléaires, B. P. no 2, 91 190 Gif-sur-Yvette, France H. Bougault, Centre Ocdanologique de Bretagne, CNEXO, B. P. 337, 29273 Brest cedex, France M. Treuil, Institut de Physique du Glob...

Chlorine in Lunar Basalts