Shiranish formation in Sazaba Oil fields region had been divided by
Petrology study and well Logs measurements to three major members (lower –
middle – upper). Then these members have been divided to lithostratigraphic
units and subunits. This stu
dy showed that the lower member is formed of
clayey - limestone rocks rich in planktonic foraminifera and glaconitic sand.
The middle member consists of organic limestone facies, dolomitic-limestone,
sometimes clayey - limestone rocks with crystals of pyrite and glaconitic sand.
Organic- limestone rocks and detrital limestone are predominant in the upper
member interbeded by dolomitic-limestone and rare clayey – limestone. This
facies contains pelagic and planktonic foraminifera.
The role of diagenes phenomenon is evident on Shiranish’s facies through:
dolomitization according to burial and miksing processes. It is also clear
through chemical compaction, mechanical compaction, cemenation,
micretisation and silisification.
The authors’ works concern the sediments of the upper part of Tortonian
within the basin of El Ma Labiad located at the southern part of Tebessa city,
belonging to the eastern saharian Atlas mountains chain on the Algero-
Tunisian borders.
The se
dimentological analysis, carried out on 120 samples, has confirmed a
downlap development structures towards the West of the basin. These analyses
have also proved the presence of a detrital continental sedimentation of four
environments characterized by the river, delta, lake and marsh materials.
The petrographic and morphological analysis reveal a clastic sediments
essentially quartz-bearing interbedded by some argillaceous intercalations, and
a far-off water transport of an origin probably saharian.
A partial purification was performed for the fungal hydroxycinnamic acid
esterase (HCAE) from Humicola sp. by precipitation using either ammonium
sulfate or acetone.
Aluminum alloys have got extreme industrial importance since 19th century
until now. They enter into several light and heavy industries. aluminum is
hardened by impurity due to industrial application. In this study, aluminumcupper
alloys (with 0.5
% Mg) were prepared, where cupper amount was added
to aluminum in different percentages (2.5%,4%,4.5%) ,no overtaking degree of
saturation 6% of the weight of cupper. After adding definite percentage of
cupper to aluminum, the compounds are fusioned for complete blending, where
cupper atoms diffuse into aluminum. Samples are infusioned by definite
methods and circumstances. The prepared alloys were thermally treated during
8-30 hours for hardening. In this research we will concentrate on the influence
of cupper content on hardening of aluminum and other basic conditions, which
are needed to obtain higher hardness for aluminum alloys.
