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, as well as during land-based work. We analyze the samples geochemically and mineralogically to better understand how ocean crust and ocean islands form and develop. Furthermore, we study hydrothermal
Section: FB5
of many elements are in the range of 1 ppt (= 1 part per trillion = 0.000000000001 g per ml ) or better. Laboratory equipment: High-resolution double-focussing ICP-MS ThermoFinnigan Element2 NewWave UP193
at these hot springs. Our methods We analyze the rock samples geochemically and mineralogically to better understand how ocean crust and ocean islands form and evolve. In addition, we investigate the mass
Ophiolite Complex we sampled hydrothermally overprinted rocks from the exposed crustal cross-section to better understand the conditions and history of fluid through fast-spreading oceanic crust.