المجلة الليبية للعلوم

Geology, Hydrocarbon Potential Reservoirs and Age dating of the Ordovician Sequence Stages Ghadames and Murzuq Sedimentary Basins West Libya

2025-06-14T22:19:29+00:00

The Ordovician strata are mainly clastic, with palynological stage units identified in the Ghadames and Murzuq basins (F. Belhaj, 1996). Correlations are complicated by barren sections, inconsistent electric log markers, lateral lithological variations, facies changes, limited well control, and shallow penetration depths. Major unconformities correspond to the Sardinian and Taconian orogenic events, part of the broader Caledonian orogeny. The base of the Ordovician section is poorly defined in large areas of these regions, but Ordovician units are widespread. The sediments are categorized by a well-defined upper boundary unconformity, with the basal unconformity only partially known from a few wells and outcrops. Internal contact relationships among rock units are unclear, and while biostratigraphic analyses have identified several stages, their full extent is uncertain due to low palynomorph occurrence. Ordovician sandstones have excellent reservoir properties and significant hydrocarbon accumulations, with Tanezzuft Shales acting as the primary hydrocarbon system.

The clastic fill of the Ghadames and Murzuq Basins is complex due to varied depositional environments and their origins as erosional remnants of a thicker Paleozoic continental margin along Gondwana. Both basins have undergone significant erosion and sediment reworking, influenced by multiple tectonic events. Key formations along the Murzuq Basin's flanks include Tihemboka, Tibesti, Gargaf, and Atshan Sadale. They contain a substantial Paleozoic sedimentary succession of marine and transitional sediments overlying a Proterozoic to Precambrian basement, along with Mesozoic deposits. The Paleozoic sedimentation rate was low, with maximum infill exceeding 12,000 feet. The sedimentary records reveal multiple structural developments, with some faults showing north-south variations. The Paleozoic infill consists of six stages, representing five lithostratigraphic formations from the Cambro-Ordovician period: Hasawnah, Achabiyat, Hawaz, Melaz Suqran, Mamuniat, and Bir Tlacsin, with some rock units absent in both basins

Annual and Decadal Temperature variability in Libya: A comprehensive Analysis (1931-2020)

2025-06-14T17:31:31+00:00

Air temperature is a crucial indicator of the most important and urgent subject i.e. climate change globally, regionally and locally. Thus, Libya's annual mean temperature has been investigated in terms of annual variability and also decadal variability over long time series covering the period 1931-2020. A significant increase in the annual mean temperature of magnitude 0.9 C ˚ was revealed over the whole period, whereas during the late 1991-2020 period alone, a remarkable 1.16 C ˚ warming has been recorded. The latter warming figure, however has been shown as the prime responsible for the whole period annual mean temperature increase. With respect to decadal variability, despite the streak of six colder than average decades which started from the decade 1931-1940 with (-0.1 C ˚) and ended at decade 1981-1990 with (-0.2 C ˚) standardized temperature anomaly considering the reference period (1931-2020), three significant hotter than normal decades have been identified which are 1991-2000, 2001-2010 and 2011-2020 with standardized temperature anomalies (+0.5 C ˚), (+1.6 C ˚) and (+0.9 C ˚), respectively. In addition to the confirmation of the world wide well documented hot recent era i.e. last 30 year period specifically, results of this study are crucial and very important for decision makers, particularly those in close touch with diverse life sectors e.g. human health, water management, agriculture etc.

دراسة التركيب النووي لنظائر الاوزميوم الزوجية - الزوجية

2025-06-11T11:25:22+00:00

In this paper, we have been studied the Osmium even-even isotopes chain from 178 to 182 nuclei which presented to have more information about their properties. The available of experimental data for each isotope under study has been used to calculate the ratios of and , the curve of the as a function of spin (E-GOS curve) and the back- bending curve , and compared with the standard values for each limit, the rotational , the gamma - soft and vibrational . This study show as that, these nuclei have many dynamic symmetries, which begin close to the critical point limit for isotope, and the isotopes are transitional symmetry to . However, the isotope goes to the vibrational limit at high spin. On other hand isotope goes to rotational properties .

Electron orbits beyond Bohr radius

2024-09-24T02:00:42+00:00

Starting from the classical energy equation of planetary motion and reviewing the refinement picture of Bohr model of hydrogen atom, the orbits of electron around hydrogen nucleus have been determined. The values of eccentricity of electron orbits fall within the range from 0 to 1, indicating that the path of an electron changes from circular to elliptical orbits, hence it continues toward parabolic orbits.

Kinetic Isotherm and Thermodynamic Modelling of Methylene Blue Adsorption Using Green Tea-Based Biosorbents

2024-07-09T17:05:12+00:00

The current research investigated how effectively two biosorbent materials made from green tea; dry powdered material (DPM) and charcoal powdered material (CPM), removed the color methylene blue from aqueous solutions. Various experimental parameters were examined, including the pH, temperature, initial dye concentration of the dye solution, amount of adsorbent, and contact time. The results demonstrated that the maximum adsorption effectiveness for both DPM and CPM occurred at pH 10. The adsorption equilibrium was rapidly attained for DPM and CPM, taking 10 and 15 minutes, respectively. The adsorption data was fitted with four isotherm models: Dubinin-Kaganer-Radushkevich (D-R) model, Freundlich, Temkin, and Langmuir models. The best correlation was found in Langmuir model (R² = 0.996 & 0.991). Maximum adsorption capacity values of 15.58 mg/g for DPM and 18.66 mg/g for CPM were found using the Langmuir equation. The adsorption kinetics followed a pseudo-second-order model. The results showed that the thermodynamic parameters for DPM were 24.40 kJ/mol, 92.93 J/mol.K, and -3.31 kJ/mol, and for CPM they were 4.07 kJ/mol, 13.34 J/mol.K, and 0.20 kJ/mol. Gibbs free energy (ΔG^o), entropy (ΔS^o), and enthalpy (ΔH^o) were among these numbers. These findings imply that the adsorption is a spontaneous, endothermic process. The study demonstrates the efficient way in which dyes from wastewater can be eliminated by using biosorbents made from green tea.

Molecular genetics of β-talassemia in Tripoli-Libya

2025-06-14T14:39:39+00:00

β-talassemia is an inherted blood disorder, in which the body does not make as much as β-globin as it should be. Hemoglobin is the part of a red blood cells (RBCs) that carries oxygen throughout the body. β-talassemia includes three main forms, major, intermadia, and minor. β-globin DNA mutations present in 14 subjects from 866 adult samples. β-talassemia, major and minor were analyzed by DNA sequencing of amplified DNA. Different β-talassemia mutations were identified. The three common three β-talassemia found in Libya were B°CD39 (C→T) N=6, B+IVS-I,6 (C→T) N=5, and B+IVS-1,110 (G→A) N=3.

The New Integral Transform" Iman Transform" of Bessel's Function with Application for Evaluating Definite Integrals

2025-06-11T12:22:48+00:00

In the advance time, Bessel’s function play role in solving many problems of engineering and scientific challenges. Including equations like the wave equation, heat equation, Laplace equation, Helmholtz equation, and Schrodinger equation in spherical or cylindrical coordinates. In this paper, author present Iman transform of Bessel’s functions with application for evaluating definite integrals, and exploring its applications and providing examples of problems involving Bessel’s functions for integral calculation, thereby minimizing computational efforts.

Exact Travelling Wave Solutions of the Nonlinear Klein-Gordon Equation Using the Modified Tanh-Function Expansion Method and a Direct Approach

2024-07-01T22:30:32+00:00

In this paper, we will use the tanh-function method with the aid of Maple software to find new and exact travelling wave solutions of the nonlinear Klein-Gordon equation. We will also rely on a direct algebraic method based on the Liénard equation to discover other new and exact solutions. The results include soliton solutions, periodic solutions, and rational function solutions. The new results obtained in this paper will be compared with the well-known results. Additionally, some 2D and 3D graphs of the obtained exact traveling wave solutions will be presented. Finally, the tanh-function expansion method used in this paper is straightforward and concise, and it can be applied to other nonlinear partial differential equations in mathematical physics.

تقييم قدرة بعض أنواع البكتيريا المعزولة من البيئة المحلية على إنتاج إنزيم السليولاز تحت ظروف تنمية مختلفة

2025-06-11T13:09:54+00:00

تركزت هذه الدراسة على عزل البكتيريا من التربة المحلية، واختبار قدرتها على تحلل السليلوز وتأثير بعض عوامل تحسين التحلل الإنزيمي، شملت تأثير درجات الحرارة، تركيز أيون الهيدروجين وبعض المضافات الغذائية، من أصل 10 عزلات، أظهرت النتائج أن العزلة البكتيرية (BA10) كانت الأفضل في إنتاج إنزيم السليولاز، وقد عرفت على أنهاPseudomonas fluorescence ، أظهرت هذه العزلة البكتيرية اختلافا معنويا في اختبار درجات الحرارة وتأثير تركيز أيون الهيدروجين على نشاط إنزيم السليولاز. كما تم في هذه الدراسة تقييم تأثير بعض المضافات الغذائية (المالتوز، البيبتون ومسحوق أوراق وسيقان المورينجا) على إنتاج إنزيم السليولاز، أظهرت النتائج تأثير إضافة المالتوز على نسبة السكر المختزل مقارنة بالشاهد. كما بينت النتائج أن مسحوق أوراق المورينجا أظهر دعماً للعزلة البكتيرية في تحلل للسليلوز مقارنة بالشاهد، بينما مسحوق بذور المورينجا لم يظهر أي فاعلية في زيادة التحلل الإنزيمي للعزلة البكتيرية، فقد كان تقريبا مساوياً للشاهد.