Geological Map of Ammouliani Island, Northern Greece
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G E O L O G I C A L M A P O F A M M O U L I A N I I S L A N D , N O R T H E R N G R E E C E Plougarlis P. Anastasios, Tranos D. Markos Department of Geology, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece LEGEND FIELD PHOTOS OF AMMOULIANI ISLAND MAP UNITS 1 2 3 Surficial Deposits Alluvial deposits: light colored loose material consisting mainly of sands, Hal gravely sands and less gravels that form a thin blanket filling up the plain terrain of the island. 489700 495680 N S Plan view Plan view Coastal deposits: light colored medium- to coarse-grained sands and sandy 4465600 4465600 Two-mica Gneiss (gn2) Granite Gneiss - Anatexite (grgn) Hcd pebble gravels. At places dune sands and beach rocks. 76 A 10 78 66 80 80 N N 4 5 6 10 82 8 82 Lake to lagoon sediments: undifferentiated fine-grained lake to brackish 30 84 Hlg deposits in ephemeral coastal lake to lagoon environment. 60 70 grgn 80 Limb π-circle 70 76 40 FA 20 64 14 74 70 FAP N 50 54 74 80 Limb BASEMENT ROCKS 72 54 qgn 78 FA B 52 80 80 24 30 NW SE NE SW Plan view Serbo-Macedonian Massif 60 40 74 36 20 64 74 16 76 64 76 n = 139 Ammouliani Unit 76 32 40 20 n = 139 Quartzofeldspathic muscovite Gneiss (qgn) 84 44 78 Trigona 72 78 72 60 20 10 40 AMMOULIANI Quartzofeldspathic muscovite gneiss: light grey, milky to whitish colored 78 72 40 26 22 F2 Folds qgn well foliated and intensely deformed gneiss and augen gneiss with 50 80 66 4 74 97,67 60 62 7 8 9 C 58 gn2 74 granoblastic fabric consisting of quartz, feldspars, muscovite biotite and 50 46 64 30 46 46 garnet. Quartz veins of thickness of 10 to 30 cm interlayering the foliation 34 76 48 62 N N 10 66 20 66 grgn 46 56 form pinch and swell structures. At places, bands or interlayers of dark brown 36 54 biotite gneiss and augen gneiss indicate strong mylonitization (Paleozoic or 30 π-circle Mesozoic). 76 54 30 42 50 46 54 Hal lgn 44 60 24 60 60 FA Granite gneiss - Anatexite: light grey, whitish colored granitic gneiss and 54 50 74 grgn pegmatoids with signs of anatexis. Anatexis is well observed at several 40 66 Limb 70 40 20 50 Kokkinia FA places with granitic gneiss (leucosome) to form migmatitic layering along with lgn Limb NW SE Plan view NW SE dark brown biotite granites to biotite gneiss (melanosome) (Paleozoic or 40 76 34 60 70 60 66 60 82 mr FAP Mesozoic). 70 70 48 70 40 Marble (mr) Biotite Gneiss (bign) 24 88 70 44 68 75 gn2 mr amph 72 50 80 64 64 n = 47 n = 47 46 64 54 74 lgn Vertiskos Unit 55 10 60 70 qgn 70 60 88 10 11 12 48 72 F3a Folds Two-mica gneiss: in general brown colored, medium-grained monotonous gn 80 60 80 2 56 74 gn2 gneiss with lepidoblastic fabric that consist of muscovite, biotite, quartz and 60 44 15 qgn feldspars (Paleozoic or older). 64 bign 50 78 70 N N 30 64 64 74 70 50 54 46 Lefkes grgn Kerdilion Unit 80 54 88 86 80 60 mr 66 60 72 26 50 20 Marble: bluish white to white colored medium-grained marbles with 40 16 mr lgn FA 68 76 66 mr Hcd 80 46 76 70 Plan view SSE NNW W E granoblastic fabric. Foliation is not distinguishable in hand-specimen Kalopigado FAP samples. It is found in interlayers with the biotite gneiss and amphibolite gn mr Hal 70 Limb 36 2 FA Amphibolite - Hornblende Plagioclase microcline (Paleozoic or older). 80 80 amph amph Granite (gr) 74 80 A΄ Limb π-circle Ftelias Bay 20 60 74 70 70 Hal gneiss (amph) gneiss (lgn) 70 40 70 64 20 80 bign Biotite Gneiss: dark grey to dark brown foliated fine- to medium-grained 35 70 70 n = 41 n = 41 13 14 15 bign 60 bign biotite gneiss with lepidoplastic fabric. The minerals are biotite, rarely garnet, 80 74 70 Hlg feldspars and quartz. The contacts with the marbles and the hornblende amph 60 F3b Folds 60 64 gr gneiss are comfortable and parallel to the main foliation (Paleozoic or older). N 82 Hcd N 66 68 Hal 78 80 60 B΄ Amphibolite - Hornblende gneiss: greyish green to dark green 66 Hcd amph amphibolites, hornblende gneiss and biotite-hornblende gneiss with 68 fibroblastic fabric. They consist of hornblende, epidote, quartz, plagioclase Hcd N S Plan view Plan view and rarely garnet. Contacts with marbles and biotite gneiss are comfortable C΄ Hal Glastri Bay and parallel to the main foliation (Paleozoic or older). Tsarki Bay S1 - S2 Foliation IGNEOUS ROCKS n = 483 n = 47 16 17 18 S1 S2 Granite (Ammouliani): medium- to coarse-grained cream to whitish granite. Hal 68 40 gr It consists of quartz, feldspars, biotite and muscovite. At places, well foliated Foliation being a gneissic granite to an augen gneiss due to crustal-plastic deformation. It is considered part of the Eocene Ouranoupolis (OG) and 70 N Sithonia (SG) granitoids. N 56 78 gr 70 50 56 66 gr 58 Plagioclase microcline gneiss: whitish to pink, mainly medium-grained Profitis Ilias gr lgn orthogneiss consisting of muscovite, biotite, K-feldspar, plagioclase and Psili Raxi ESE WNW NNW SSE N S quartz. Other minerals are allanite, epidote (zoisite-clinozoisite), apatite and 36 64 zircon (Mesozoic?). 56 S1 - S3 Foliation F2 Folds 70 Hcd 500 m 98,08 80 19 20 21 60 68 52 n = 58 20 40 GEOLOGICAL SYMBOLS n = 67 Lineation Granite Foliation gr (Ouranoupolis) Geological contact Projection coordinate system: Greek Grid (GGRS87) 4461600 Tectonic contact 4461600 489700 495680 Plan view Plan view Plan view Fault F1 Folds F3 Folds F4 Folds Fault inferred or concealed SCHEMATIC STRATIGRAPHIC COLUMN CROSS SECTIONS OF AMMOULIANI ISLAND GEOLOGICAL SETTING AND REFERENCE MAPS OF AMMOULIANI ISLAND (m) NNW SSE 62 Shear zone and its possible extension 100 o o o 23 24 25 gn2 LEGEND lgn 0 Post-Alpine Sediments 68 Strike and dip of foliation BULGARIA qgn amph amph E U R O P E N Quaternary sediments gn2 -100 gn2 Sidironero 35 Neogene sediments 68 qgn 100m OM Strike and dip of foliation with the plunge of lineation qgn -200 YR Thrust mr mr grgn F Molasse - type sediments grgn bign 200m Falakro Mt. amph lgn -300 lgn Vrontou Mt. Internal Hellenides 30 Plunge of fold axis Strymon R. amph bign Lekani Mt. Axios Zone GREECE Drama Xanthi 74 Circum Rhodope Belt Thrust System Fold with dip of limbs and plunge of fold axis b Serres 48 mr (m) NW SE 41o Hellenic Hinterland 56 amph Strymon Line Nestos R. gr 100 41o Vertiskos Mt. Serbo-Macedonian Massif bign FG Vertiskos Unit 0 SITE OF FIELD PHOTOS gn amph gn2 2 A F R I C A Kerdilion Unit -100 amph a 5 16 Kerdilia Rhodope Massif 13 Hellenides Mt. Thassos 17 3 15 -200 grgn gr Langada Strymonikos Gulf Island Sidironero Unit bign Lake Volvi Lake 80 Axios R. Thessaloniki 60 7 amph bign N 4 40 VERTISKOS UNIT In Hinterland Pangeon Unit 21 20 20 lgn AG 6 -300 t 19 97,67 ernal ACID MAGMATIC INTRUSION StG Igneous Rocks 14 c 20 B B΄ AG Volcanic rocks (Oligocene) 40 Ext 60 12 Thermaikos Gulf NORTH AEGEAN SEA MG IG ernal Hellenides Granitoids (Tertiary) 1 (m) NW SE 18 AMMOULIANI Granitoids (Mesozoic) 8 9 20 UNIT 100 OG 80 10 60 ? gn 2 40 2 Ammouliani 20 Basic-Ultra basic rocks (Mesozoic) 0 gn Island Siggitikos Gulf gn2 2 GG gn2 Athos Normal & possible normal fault -100 amph Peninsula Thrust & possible thrust fault gn2 11 qgn Sithonia KERDILION UNIT -200 lgn SG Orogenic fabric trajectories Peninsula o OG qgn 42 AG: Arnea granitoid OG: Ouranoupoli granitoid grgn gr o Kassandra -300 42 Peninsula 30 km IG: Ierissos granitoid MG: Monopigado granitoid 98,08 80 bign 60 20 40 SG: Sithonia granitoid GG: Gregoriou granitoid b c 23o 24o C C΄ StG: Stratoni granitoid FG: Flamouri granitoid © Journal of Maps, 2014.