Hamilton Warren B
Department of Geophysics, Colorado School of Mines, Golden, CO 80401, USA.
Science. 2007 Nov 2;318(5851):746; author reply 746. doi: 10.1126/science.1144931.
The claim by Furnes et al. (Reports, 23 March 2007, p. 1704) that Greenland metavolcanic rocks require Paleoarchean sea-floor spreading is incompatible with their own data. The purported sheeted dikes have the composition of pyroxenitic komatiite and could not have fed the adjacent ferroandesitic pillow lavas. Neither type has ophiolitic analogs, and both are likely ensialic.
弗内斯等人（《报告》，2007年3月23日，第1704页）声称格陵兰变质火山岩需要古太古代海底扩张，这与其自身的数据相矛盾。所谓的席状岩墙具有辉石质科马提岩的成分，无法为相邻的铁安山质枕状熔岩提供岩浆。这两种类型都没有蛇绿岩类似物，而且很可能是陆内成因的。
