Figure 1
From: Vein networks in hydrothermal systems provide constraints for the monitoring of active volcanoes
(A) Location of Lipari Island. (B) Shaded relief of Lipari Island with location of the main eruptive vents. (C) Geological map of the alteration zones, fractures and faults, and sites of measurements. Background colors in C indicate the different geological units along with ages11 as shown in the right insets. The thin dashed black line indicates the trail. (D) Outcrop A5 (E1 zone, view from the South) showing a system of ca. N-S striking gypsum and anhydrite filled veins with a sub-parallel arrangement affecting the welded to altered scorias of Timpone Ospedale Formation. (E) Outcrop A4 (E2 zone, view from the Southwest) showing cm-sized veins with orthogonal (a), quasi-anastomosed (b), and sub-parallel (c) arrangement. (F) Gypsum crystals filling a now inactive hydrothermal vent (measurement station A4 in C). The maps A, B, and C of this figure were generated with Adobe Illustrator CC 2015.0.0 by Adobe Systems (www.adobe.com, institution licensing).
