Chemical analysis of ODP Hole 104-642E ...

• Main Authors: Viereck-Götte, Lothar, Hertogen, Jan GH, Parson, Lindsey M, Morton, Andrew C, Love, Dave, Gibson, Ian L
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1989
• Subjects: Drilling/drill rig; Leg104; Joides Resolution; Ocean Drilling Program ODP; Greenland; Norwegian Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.736975; https://doi.pangaea.de/10.1594/PANGAEA.736975

During Ocean Drilling Program Leg 104 a 900-m-thick sequence of volcanic rocks was drilled at Hole 642E on the Vøring Plateau, Norwegian Sea. This sequence erupted in two series (upper and lower series) upon continental basement. The upper series corresponds to the seaward-dipping seismic reflectors and comprises a succession of about 122 flows of transitional oceanic tholeiite composition. They have been subdivided into several formations consisting of flows related to each other by crystal fractionation processes, magma mixing, or both. Major- and trace-element chemistry indicates affinities to Tertiary plateau lavas of northeast Greenland and to Holocene lavas from shallow transitional segments of the Mid-Atlantic Ridge, such as Reykjanes Ridge. The tholeiitic magmas have been derived from a slightly LREE-depleted mantle source. Two tholeiitic dikes that intruded the lower series derive from an extremely depleted mantle source. Interlayered volcaniclastic sediments are dominantly ferrobasaltic and more ... : Supplement to: Viereck-Götte, Lothar; Hertogen, Jan GH; Parson, Lindsey M; Morton, Andrew C; Love, Dave; Gibson, Ian L (1989): Chemical stratigraphy and petrology of the Vøring Plateau: theoleiitic lavas and interlayered volcaniclastic sediments at ODP Hole 642E. In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 367-396 ...