Preliminary Study of Accretion Complexes of Mangilu Area, Pangkep Ragency South Sulawesi

The exposure of Mesozoic rocks in the Mangilu area, both as a result tectonic deformation form mélange, low-high degree metamorphism and deep-sea sediments (flysch, radiolarian cherts, sediment flow olistostrome), which formed subduction zone indicates complex accretionary rocks. purpose this study is to identify trace era. method used was field observation, including collection geological data, deformation, rock groups laboratory analysis (petrography). In general, accretion divided into 2 categories, namely a). oceanic volcanic crust; b). terigenous from continents with sialic beds. group consists gabbro, diabase, dolerite, pillow hyaloclastic lava, consist chert mali limestone. terigen sedimentary flysch type sandstones olistostrome components granite, granodiorite, dacite diabase. Other found autoclastic breccia area metaperidotite, serpentinite, quartzite metachert. Based on Oceanic Plate Stratigraphy (OPS) arrangement, bottom up, ultramafic/serpentinite, basaltic hyaloclastic, chert, limestone sediments. mixing originating plates continental breccias that has experienced strong thurst Tertiary