Study of Palaeomagnetism and Magnetic and Some Physical Properties of Tertiary Igneous Rocks of Sana’a Region (Republic of Yemen)

Palaeomagnetism and some magnetic and physical properties (magnetic susceptibility, intensity of remanent magnetization, ac current electrical conductivity and density) of 115 samples from 18 sites of the Yemen Volcanic Group TKY (Tertiary and (or) Cretaceous) from igneous rock exposures from Sana’a region were studied. One palaeomagnetic pole position was determined and a magneto-strigraphy of the area was suggested. The different properties were measured in order to use them as characteristic factors in discriminating the neighboring igneous flows. The measurement of the in situ magnetic susceptibility of 80 points, distributed on 4 sub-areas, in the area helped to calculate the mean value of the magnetic susceptibility of each sub-area, which may be used in any magnetic interpretation of aeromagnetic or magnetic anomalies. Also, the density of 115 samples were measured and a mean value of the density of each sub-area and an overall mean density of each rock age, were calculated in order to be used in any future interpretation of any gravity anomaly in the area.

Study of Palaeomagnetism and Some Magnetic and Physical Properties of Some Tertiary Igneous Rocks between Sana’a and Al-Hudyadah Region (Republic of Yemen)

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.

Dating and Correlating Some Syrian Basaltic Rocks by Using Some of Their Magnetic Properties

Palaeomagnetism and some magnetic and physical properties (magnetic susceptibility, intensity of remanent magnetisation, ac current electrical conductivity and density) of many basaltic samples were studied.

Palaeomagnetism and Some Magnetic and Physical Properties Studies of Upper Pliocene Basaltic Rocks ( West of Homs - Syria)

Palaeomagnetism and some magnetic and physical properties such as magnetic susceptibility, intensity of remanent magnetisation, ac current electrical conductivity and density for the number order (٣٩ - ٥٤) of samples from ٩ sites of Upper Pliocene basaltic rocks from the area west of Homs were studied. The aim of the works to extend the previous studies (Abou- Deeb, ١٩٩٧a, b) to other regions so that these properties might be used as characteristic factors in discriminating the basaltic flows.

Studies of Some Magnetic and Physical Properties of Middle Miocene Basaltic Rocks ( Kisweh - South of Damascus )

Some magnetic and physical properties ( magnetic susceptibility , intensity of remanent magnetisation , ac current electrical conductivity and density ) of ١٨١ samples from ٣٠ sites of Middle Miocene basaltic rocks (β 1 N2) from Al- Kisweh region south of Damascus were studied, in order to extend the previous study ( Abou-Deeb, ١٩٩٧) to other regions so that these properties might be used as characteristic factors in discriminating the neighbouring basaltic flows .The measurement of the in situ magnetic susceptibility of ٧٥ basaltic sites , distributed on ٨ localities , in the region helped to calculate the mean value of the magnetic susceptibility of each locality and an overall mean value of the whole region, which might be used in any magnetic interpretation of the magnetic anomalies. Also, the density of ١٢٨ samples were measured and a mean value of the density of each locality and an overall mean density were calculated in order to be used in any future interpretation of any gravity anomaly in the region .