Presentation on theme: "Ni-laterites, Ni in soils in east Albania"— Presentation transcript:
1Ni-laterites, Ni in soils in east Albania Simplified tectonic map of central part of Albania (Hoxha, 2001). B: Distribution of ophiolites along of the Balkan Peninsula (after Bortolotti et al., 1996).
2Ni-laterites, Ni in soils in east Albania Geological map of the Prrjenas intramontane basin (from the Geological Map of Albania 1:200,000). Noticeable that the chain of Ni-laterite deposits follows always the boundary of serpentinite and the cover Cretaceous limestone.
3Ni-laterites, Ni in soils in east Albania Panoramic view of the Prrenjas intramontane basin with indication of the position of the village, the mines and the typical lithologies of the major chines.
4Ni-laterites, Ni in soils in east Albania Synoptic profiles of major types of the Ni-laterite deposits of the Balkan Peninsula. Compiled according to: Ivanov, 1960; Augusthitis (1962); Arkaxhiu and Kici (1990); Skarpelis et al., 1996; Skarpelis, 1997; Eliopoulos and Economou-Eliopoulos, 2000; Peci and Grazhdani, 2001 and field observations of ID in (a)-(d): deposits of Cretaceous age. The first column (a) represents the most typical profile; the laterite deposited more-or-less autochtonously on the weathered ultrabsic rock. (b): The lateritic material was redeposited and covers slightly- or unwathered ultrabasite. (c) & (d): The lateritic material was resedimented on Mesozoic limestone. (e): the footwall and henging wall of the deposit is bordered by faults, the stratigraphic age of the cover sequenci is unknown. (f): Paleogene cover with alternating deposition of lateritic and siliciclastic material. (g): Deposits in the Miocene sequences.
5Ni-laterites, Ni in soils in east Albania Major stages of post-sedimentary overprint of the laterite deposits of the Balkan Peninsula and the Greek archipelago.
6Ni-laterites, Ni in soils in east Albania Geological setting of laterite ore deposits of the Edessa are, Greece a: Messimeri; b: Vrita; c: Flamuria (from Michaildis, 1990). These profiles show how different are the stratigraphic successions even within a small area further these profiles are representing well the characteristic tilting and thrusting.
7Ni-laterites, Ni in soils in east Albania The base of the Bitincka laterite layer shows a complex geometry, partly due to the deposition on the irregular surface of the serpentinite, but a young faulting has also some role.
8Ni-laterites, Ni in soils in east Albania The immediate cover sequence in Bitincka.
9Ni-laterites, Ni in soils in east Albania Ni-silicate veins in the Ni-laterite.
10Ni-laterites, Ni in soils in east Albania Serpentinite pebbles and clasts in protolaterite – Kurbneshi, northern Albania.
11Ni-laterites, Ni in soils in east Albania Limestone fragments in Ni-laterite – Katjeli.
12Ni-laterites, Ni in soils in east Albania Ni-laterite mines and dumps are throning above the settlements.
13Ni-laterites, Ni in soils in east Albania Microscopic reflected light image of a weathered chromite grain (gray) which is replaced along cracks by hematite (white). Width of picture is ca. 270 µm (from Augustithis, 1962).
14Ni-laterites, Ni in soils in east Albania from Michailidis et al. (1985)