Major and trace elements and interelement ratios at DSDP Leg 81 Holes ...

• Main Authors: Richardson, Colin, Oakley, P J, Cann, Joe R
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1984
• Subjects: Deep Sea Drilling Project DSDP; East Greenland; Greenland
• Online Access: https://dx.doi.org/10.1594/pangaea.807094; https://doi.pangaea.de/10.1594/PANGAEA.807094

Fifty-two samples of basalt from the four holes drilled on the Leg 81 transect across the Rockall margin were analyzed by X-ray fluorescence for Rb, Sr, Y, Zr, and Nb. On the basis of these results 13 samples were chosen for major and supplementary trace-element analysis. The results show no progressive change in the character of the volcanism, from Hole 555 in the continental domain through Holes 552 and 553A in the dipping reflector sequence to Hole 554A on the outer high. Two distinct magma types are present, apparently reflecting heterogeneity of the underlying mantle, but both types are present in both Holes 553A and 555, while Hole 552 and Hole 554 are each composed of a single type. Both magma types have a clear ocean-floor basalt signature when examined by discrimination diagrams, as does the basalt from Deep Sea Drilling Project Site 112, which formed at the same time as the Leg 81 basalts slightly farther south along the spreading center. In contrast, the basalts of East Greenland, formed at the ... : Supplement to: Richardson, Colin; Oakley, P J; Cann, Joe R (1984): Trace and major element geochemistry of basalts from Leg 81. In: Roberts, DG; Schnittker, D; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 81, 795-806 ...