Mineral Resources Potential - Geothermal Resources

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Ug&e (CbilgiType)
hrw mrces 20s
$ @::of iig&'te occmnce, of which Chilga is the best
example,, is found as .fluvatile andlor lamtrine intercalations
within the volcilllios (Tmp Series) of Northem Ethiopian
Plateau Lignite seams of Delbi: Moye, Meteso, Lalo-Sapo, Debre
~ i ~ o~hida, s , Beressa, Mush Vdley, Soyoma, Wda, Chida
Ankober, Sululta, Kindo, Wuchalle, kie, Dills, Jiren, dl belong
to this group and occur under similar geological settings to those st
Chilga. The lignite bearing are characterized by the presence
of vol~clasts irregularly alternating with wyhg thickness of
carbonaceous shale's with thin lignite seams, and qresent
deposition during the periods of quiescence in between the
volcanic eruptions.
d
G-eneraW stratigraphy of the Inter-Trappean type lignite
Cen'bmic-volcanic rocks' with intercalations of continental
volcaniclasts and shales with lignite seams
. I .
Mesozoiic - contitid and marine sedimentary mks
, .
Thea deposits, as the name makes clear, always occur below the
Cenozoic volcolnics (Tmp Series), between the Mesozoic
continental clastia and volmics, generally intermed with
sedimentary rocks. Such deposits are few compared with Inter-
Trajpan type. Examples of this type of occurrence include Arjo,
Diddessa and Hun& Blesuma.