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16 19 00' N 70 20' W Loma La Cuaba volcanic edifice 70 00' W Pueblo Viejo District (location of Fig. 2) Loma Navisa volcanic edifice 69 40' W & S a m a n á B a y Kilometers 18 50' N Guaimarote Hatillo thrust Managua Early Cretaceous metavolcanic rock units El Altar zone Ozama shear zone Los Ranchos Fm. Maimon DOMINICAN REPUBLIC HISPANIOLA uncertain age Loma Caribe peridotite MAP AREA

17 Epiclastic Epiclastic Epiclastic Epiclastic Epiclastic Epiclastic Epiclastic Epiclastic Epiclastic lapilli tuff lapilli tuff lapilli tuff lapilli tuff lapilli tuff lapilli tuff lapilli tuff lapilli tuff lapilli tuff BENCH BENCH BENCH BENCH BENCH BENCH BENCH BENCH BENCH FIVE FIVE FIVE FIVE FIVE FIVE FIVE FIVE FIVE Dacite Dacite Dacite Dacite Dacite Dacite Dacite Dacite Dacite Tertiary diorite Tertiary diorite Tertiary diorite Tertiary diorite Tertiary diorite Tertiary diorite Tertiary diorite Tertiary diorite Tertiary diorite dikes dikes dikes dikes dikes dikes dikes dikes dikes Sandstone Sandstone Sandstone Sandstone Sandstone Sandstone Sandstone Sandstone Sandstone Hatillo Hatillo Hatillo Hatillo Hatillo Hatillo Hatillo Hatillo Hatillo UPPER UPPER UPPER UPPER UPPER UPPER UPPER UPPER UPPER MOORE MOORE MOORE MOORE MOORE MOORE MOORE MOORE MOORE CUMBA CUMBA CUMBA CUMBA CUMBA CUMBA CUMBA CUMBA CUMBA Andesite Andesite Andesite Andesite Andesite Andesite Andesite Andesite Andesite NORTH NORTH NORTH NORTH NORTH NORTH NORTH NORTH NORTH SOUTH SOUTH SOUTH SOUTH SOUTH SOUTH SOUTH SOUTH SOUTH S S S S S S S S S Crumble Crumble Crumble Crumble Crumble Crumble Crumble Crumble Crumble Las Lagunas Las Lagunas Las Lagunas Las Lagunas Las Lagunas Las Lagunas Las Lagunas Las Lagunas Las Lagunas & 250 meters 500 0

18 PUEBLO VIEJO STRATIGRAPHY EARLY MIDDLE (?) CRETACEOUS CRETACEOUS TERTIARY Fine-grained, unaltered diorite dikes and plugs. Las Lagunas Thin to medium bedded calcareous shales and phyllites with interbedded limestone layers. Hatillo Massively bedded reef limestones. Los Ranchos Dacite dome and. Includes: - massively-bedded lapilli tuff with hydrothermally altered lithic fragments and quartz eyes (v pattern). - massive dacite porphyry dome with quartz phenocrysts (+ pattern). - matrix-supported dacite vent (triangle pattern). Medium-bedded (5-50cm) epiclastic carbonaceous sandstones with interbedded carbonaceous siltstones. Conglomeratic adjacent to domes. Thinly-bedded (.5-5cm) epiclastic carbonaceous siltstones with interbedded carbonaceous sandstone. Coarser-grained adjacent to domes. Epiclastic lapilli tuff s with interbedded carbonaceous sediments. Grades laterally into carbonaceous sandstone. Coarsely-fragmental epiclastic crumble containing abundant unsorted andesite clasts and lesser epiclastic sedimentary clasts. Occurs within and adjacent to exogenous basaltic andesite domes. Andesite flows, domes, and s. Includes: - massively-bedded lapilli tuff with abundant mafic to intermediate fragments and no quartz eyes (v pattern). - massive, crowded-feldspar porphyry domes and flows (+ pattern). - steeply-dipping andesite dikes (shaded).

19 Crumble NW 46 MOORE DACITE Epiclastic lapilli tuff Dacite 2 g/t Au SE 1 g/t g/t g/t Au Au Au Dacite vent Cover ANDESITE & NW 2 g/t Au 1 g/t Au MOORE DACITE AND VENT BRECCIA 1 g/t Au Dacite SE Sandstone 2 g/t g/t g/t g/t g/t g/t g/t g/t g/t Au Au Au Au Au Au Au Au Au? g/t Au Epiclastic lapilli tuff ANDESITE g/t g/t g/t g/t g/t g/t g/t g/t g/t Au Au Au Au Au Au Au Au Au meters

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21 g/t Au 1 g/t Au Crumble Andesite Dike Sandstone W E SOUTH & W Crumble 1 g/t Au 2 g/t Au Andesite Dike 1 g/t Au E SOUTH ANDESITE Sandstone meters 200 ANDESITE

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24 S AND GOLD DEPOSIT UNMINERALIZED EPICLASTIC SEDIMENTARY BASIN MOORE AND GOLD DEPOSIT AND GOLD DEPOSIT? A. CARBONACEOUS SANDSTONE AND MUDSTONE B. CARBONACEOUS CONGLOMERATES LAPILLI TUFF HALTILLO LIMESTONE COARSE EPICLASTICS DIATREME FISSURE