Geochemical composition and crystallization conditions of melts from the Mid Atlantic Ridge near Ascension Island (7-11°S)

deridge; dredge; drg; from mantle to ocean: energy-, material- and life-cycles at spreading axes; m41/2; m41/2_132; m41/2_133; m41/2_136; m41/2_137; m41/2_138; m41/2_139; m41/2_140; m41/2_141; m41/2_142; m41/2_143; m41/2_144; m41/2_145; m41/2_146; m41/2_147; m41/2_148; m41/2_149; m41/2_151; m41/2_152; m41/2_153; m41/2_154; m41/2_155; m41/2_156; m41/2_157; m41/2_158; m41/2_159; m41/2_160; m41/2_161; m41/2_162; m41/2_163; m41/2_164; m41/2_166; m41/2_167; m41/2_169; m41/2_170; m41/2_171; m41/2_172; m41/2_173; m41/2_174; m41/2_188; m41/2_189; m41/2_190; m41/2_191; m41/2_194; m41/2_195; m41/2_196; m41/2_197; m41/2_198; m41/2_199; m41/2_200; m41/2_201; m41/2_202; m41/2_203; meteor (1986); mid-atlantic ridge at 4-11°s