13. Data Report: Alteration and vein log of Holes 917A and 918D, Southeast Greenland margin1

Damon A.H. Teagle2 and Jeffrey C. Alt2


This data report provides a systematic documentation of the low-temperature alteration associated with the formation of a volcanic-rifted margin by the quantification of alteration effects and vein mineralogy and distributions in basalts recovered on Leg 152 (Larsen, Saunders, Clift, et al., 1994). Basaltic rocks from Holes 917A and 918D (Fig. 1) have been investigated to provide a quantitative description of the extents of recrystallization and secondary mineral abundance resulting from low-temperature alteration and weathering. Only limited descriptions of alteration and secondary mineral distributions were undertaken on board ship during Leg 152, and the data presented here provide an essential complement to the shipboard logs of the limited amount of basalt recovered during Leg 163 from Sites 988, 989, and 990 (Duncan, Larsen, Allan, et al., 1996).

Date of initial receipt: 12 January 1998
Date of acceptance: 1 September 1998
Ms 163SR-116

1Examples of how to reference the whole or part of this volume can be found under "Citations" in the preliminary pages of the volume.
2Department of Geological Sciences, 2534 C.C. Little Building, University of Michigan, Ann Arbor, MI 48109-1063, U.S.A. Damon.Teagle@soc.soton.ac.uk