Field study of the basalt rocks indicate in Jaubet-AL Dilbe that casts basalt in the
field consist of tuffit, pyroclastic Sometimes consist of porphyric coarsebasalt with lava
structure and brescia of tufa ,which contain a lot of surrounding rocks
as lime stone and
dolomite. The basalt mass noting the presence of dykes in search area incisor squad
pyroclastic. The basalt color is light gray to dark gray. It is form the following
petrographical kinds: olivine basalt, olivine augite basalt, olivine plagioclase basalt,
plagioclase basalt. As for the lapilli consist of basalt (olivine basalt olivine vascular basalt
and plagioclase basalt)
Palaeomagnetism and some magnetic and physical properties (magnetic
susceptibility, intensity of the Natural Remnant Magnetization (NRM), ac
current electrical conductivity and density) of 136 samples from 22 sites of the
Yemen Volcanic Group TKY
(Tertiary and (or) Cretaceous) from igneous rock
exposures along the road from Sana’a – west towards Al-Hudyadah were
studied. A single population consists of seven Virtual Geomagnetic Poles
(VGP), of the Upper Oligocene, was accepted and a mean at 182.81° E, 77.44° N
with α95= 12.5° was calculated. The different properties were measured in
order to use these properties as characteristic factors to discriminate the
neighboring igneous flows. The measurement of the in situ magnetic
susceptibility of 140 points, distributed on 7 sub-areas, in the region helped to
calculate the mean value of the magnetic susceptibility of each sub-area, which
might be used in any magnetic interpretation of aeromagnetic or magnetic
anomalies. Also, the density of 132 samples were measured and a mean value of
the density of each sub-area was calculated in order to be used in any future
interpretation of any gravity anomaly in the area.
Density
Basalt
الكثافة
المتأثرية المغنطيسية
المغنطيسية المتبقية الأولية
مجموعة صخور اليمن الاندفاعية
Magnetic susceptibility
Palaeomagnetism
بازلت
الناقلية الكهربائية (بالتيار المتناوب)
اغنمبريت
طف ملتحم
بورفيريت أساسي
أغلوميريت
NRM = Natural Remnant Magnetization
ac current electrical conductivity
(Virtual Geomagnetic Poles (VGPs
ignembrite
welded tuffs
basic porphyrites
المزيد..
The aim of this study is to use the measured values of the magnetic
susceptibility in the classification of the basaltic rocks and their different
differentiation degrees as an additional discrimination factor to the
geochemical analyses, which we
re applied on the basalts of southern and southeastern
Syria. So the magnetic susceptibility of ٢٠٤ specimens sampled from all
the ٧ basaltic groups in Qasr Shbeeka area in addition to ٦٢ specimens
sampled from three groups from outside the studied area were measured. This
led to the determination of all the magnetic susceptibility ranges, their mean
values and their standard deviation of the basaltic rocks in the area.
This paper Presents a Petrographic and geologic study of basaltic
rocks in( Hrbet AL-Sindian). which is part of the Diaeremes to the
plosirelacune Qardah district .In study, We identify the type of
Cretaceous and Neogene basalt rock in the studied
area.
This study deals with the basaltic rocks spread in Sheen Volcanic
Hill. Where the studies have signified that these volcanic eruptions
are an extrusive emergences, come from Sheen Barsheen Volcano,
which Were poured as basaltic casts of declinatio
ns towards the
east, separated by lateritic separations, date back in origin to the
end of late Miocene- Pliocene of big thicknesses near the rifting
line, over 800 m, thick.
This paper studies a practical laboratory process of the possibility of benefiting from an
important resource of the natural resources available in the country, namely "Basalt"
which is found in large quantities in the southern region (As-Suwayda)
to demonstrate
how much it meets the requirements of Standard Specifications for use in the manufacture
of concrete by testing five design mixtures of concrete , of which the cubic dimensions are
(15% x 15) cm and the cylindrical dimensions are (15 * 30 cm) with different percentages
of the basaltic and dolomitic calcareous compounds used in them as follows: (0% basalt
and 100% lime),( 25% basalt and 75% lime) , (50 % basalt 50 % lime) (75% basalt 25%
lime), (100%basalt and 0% lime) on the strength of pressure and tensile strain by
Splitting and Moduls of Elasticity of ages (28-7-3) days, and its effect on the behavior of
Reinforced Structural Elements susceptible to shear and Bending through testing
Reinforced beams of dimensions (16 × 12 × 200) cm on shear, Bending and cracking
Moduls (Coefficient) with ages of (14-28) days.
This paper studies a practical laboratory research of the possibility of utilizing the
natural resources available in the country, namely Basalt, which is available in large
quantities in the southern region (Al-Suwayda) in order to demonstrate the
extent to which
it meets the requirements of standard specifications for use in the manufacture of
(Reinforced) concrete by means of testing the resistance of pressure and tensile by
splitting and the elasticity coefficient of hardened (rigid concrete) at Different ages (3-7-
28) days.
As a result, pressure resistance tests increased by approximately 20 % with the
maturating period progress of concrete mixtures.
The pressure resistance of concrete mixtures prepared using basalt pebbles was
approximately 18% higher than the pressure resistance of concrete formed
usingcalcite(calcareous) pebbles in ages above 7 days
There was also a slight decrease of 8% in the split tensile resistance of the studied
samples prepared with basalt minerals , compared with the samples prepared using calcite
(calcareous) pebble and this resistance increases over time .
As for the elasticity coefficient , a 20% increase in the elasticity coefficient of the
concrete was noticed with the maturating of the concrete mixtures compared to the
referential mixture.
تم تحضير إثنا عشر مقطعاً تمثل المنطقة المدروسة في ضهر القصير ( حمص) لتحقيق الهدف من هذه الدراسة وتم وصفها مورفولوجياً وجمعت العينات الترابية من آفاق كل مقطع بشكل منهجي وجرى تحليلها مخبرياً
