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Register a new userStudy of the properties of the Joints in the central part of the AL-Kabir AL Shimali River basin
دراسة خصائص الشقوق في الجزء الأوسط من حوض نهر الكبير الشمالي
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بينت دراسة خصائص الشقوق العامة في الجزء الأوسط من حوض نهر الكبير الشمالي، وجود عدة مجموعات رئيسة للشقوق ذات اتجاهات: E-W و ، NW-SE و ، NNE-SSW إلى NE-SW و ازدياد معدل التشقق في الأجزاء الشمالية و الجنوبية من منطقة الدراسة، و أن التباعدات متقاربة الى متوسطة التقارب (34-5)cm كما تراوح عرض فرجة الشق بين الشقوق ( 0.1-5.1 )cm، حيث لوحظ ازدياد في عرض فرجة الشق جنوب غرب بحيرة 16 تشرين في نطاق صدع اللاذقية-كلس.
Study of the general characteristics of Fractures in the central part of the AL-Kabir AL- Shimali river basin showed the presence of several main groups of Fractures with directions NE-SW _ NNESSW, NW-SE , E-W.and showed increased fracture rate in the northern and southern parts of the study area, and that the spacing between the Fractures close to the medium convergence (5-34) cm , also show a aperture ranged between (0.1-5.1) cm, where aperture width was increased in southwest of Lake 16 October near Lattakia- Kless fault .
References used
ALJASSIM, A.K.1969-”Stratigraphy and tectonic of Nahr Alkabir Alshmali Depression”. Report on the geological survey, Damascus
HARDENBERG, M. F; ROBERTSON, A. H.F.2007-”Sedimentology of the NW margin of the Arabian plate and the SW NE trending Nahr El-Kabir half-graben in northern Syria during the latest Cretaceous and Cenozoic”. Sedimentary Geology, 201,p231-266
HODGSON, R. A. 1961-”Classification of structures on joint surfaces”. American Journal of Science ,259,P 493-502
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Middle Miocene deposits reveal the form of outcrops which are limited in area on
the northern boards of the basin of AL-KABEER Al-Shemaly River. It is characterized by
a large and fast changes in thickness and facies.
This study focused on the res
ults of careful Fossile analysis of 41 samples (hard and
soft) which were taken from the three geological sections, through which the principal
zones, which characterize middle Miocene, were confirmed depending on planktonic
foraminifera.
N9, -Orbulina suturalis-Globerotalia peripheroronda
N10-N13-Globerotalia fohsi, Sphaaerodinellopsis subdehiscens- Globigrina drury ,
N14 – Globigerina nepenthes- Globerotalia siakensis.
It was identified as benthic foraminifera, which has been characterized by its
diversity and their increasing numbers in the northern boards of the Neogene basin and
identify the lithology of these deposits consisting of alternations of limestone and
limestone of medium hardness to very soft marl with different colors.
This study also contributed to the detection of some paleogeographical development
in the basin in that period of time.
The aim of this research is to identified the tectonic evolution of
Naher Al-Kabir Al-Shimaly Basin from tectonic subsidence curve
witch calculated from Lattakia1 well data. Tectonic subsidence
was identified in lower-middle Jurassic en relation o
f opening of
East Mediterranean basin. A subsidence is occurred in
Cenomaniane, after a stage of uplift in late Jurassic-lower
Cretaceous en relation to fold and erosion known at regional
scale.
The statistical Study of Jointsarround 16 Tishreen lake dame region in ALKabir
ALShimali river basin showed the presence of several main groups of Joints with
directions NE-SW _ NNE-SSW, NW-SE, E-W.
- Group NE-SW: showed correspond to with the fau
lt structures of same directions
which are normal and reversal faults and distributing geographically 1n Lattakia Kallas
fault zone. Also it showes correspond to with the axis of folds of same direction, thus
explained as longitudinal joints within these folds
- Group NW-SE: showed correspond to with faults structures of same direction.
which are left and right lateral strike slip faults, Spread over the entire study area. and it
may(diagonal)shear group within the folds of NE-SW axes.
- Group E-W:correspond to with normal faults structures.
The lithological study and micropaleontological analyses of 21 samples
taken from four geological sections of lower Miocene deposits led to a
stratigraphic study for determination of enrichment of planktonic species in
these deposits . These speci
es were combined with biozones of lower miocene
and their stratigraphic distribution in the studied sections according to
planktonic foraminifera of worldwide spreading . This study contributed in
understanding of paleogeographic development of Neogene basin within this
period of time , which appeared as a marine progress in lower Miocene ,
which continued up to upper Miocene in the northwestern part of Syria . The
sediments of lower Miocene consisted of marl , clay marl deposits with
interfacial layers of clay and limestones or marl limestones deposited
unconformithy with nummoliticlimestones of Eocene , or cretaceous
carbonates rich in betome sometimes .
This study deals with spatial and temporal distributions of organic and inorganic
phosphorus in sedimentary columns from Al-Kabir Al-Shimaliand Al-Hussain estuaries,
during the period March 2013- February 2014.
Organic phosphorus concentrations ra
nged between (2.0 - 207.6) μg/gin sediments
from Al-Kabir Al-Shimali estuary, and from (1.7 –130.9) μg/gin sediments from
Al-Hussainestuary. Sediment content from inorganic phosphorus ranged between
(12.4 – 371.2)μg / g at sediments from Al-Kabir Al-Shimali estuary, and from
(2.0 - 242.6)μg /g at Al-Hussain estuary. Granular composition of sediments did not play
a significant role in the temporal and spatial distributions of organic and inorganic
phosphorus.
In general, organic and inorganic phosphorus concentrations decreased gradually
from winter to summer, and from surface layers of the sedimentary column towards the
deeper layers.
The ratiobetween inorganic and organic phosphorus increasedfrom river into marine
sediments. In addition, this ratio increased gradually as the sedimentdepthincreased, and
was high in winter and low in summer.
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