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Register a new userCharacterization of composition and origin of barite Nodulesin Qerdaha region
توصيف العقد الباريتية في منطقة القرداحة من الناحيتين التركيبية و المنشئية
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درست خامات الباريت في منطقة القرداحة مف الناحيتيف التركيبية و المنشئية. تمت عمليات المسح الحقلي و رفع المقاطع الجيولوجية العائدة للماستريخت، و أخذت عينات الدراسة و هي على شكل عقد شبه كروية. تم تحديد التركيبين الفلزي و الكيميائي للعينات المدروسة باستخدام جهاز XRD كما وصّفت العينات بترولوجياً. يتكوّن التركيب الفلزي للعقد بمعظمها من الباريت و الكالسيت بنسب متفاوتة. تبيّن أن العقد المأخوذة من شمال الرقعة هي عقد باريتية نقية إلى شبه نقية، و بالاتجاه جنوباً تصبح عقداً كالسيتية نقية إلى شبه نقية.
Composition and origin of barite ores studied in Qerdaha region. The fieldwork was done on geological sections belong to Maastricht, from which many nodules like specimens were taken. Both mineralogical and chemical composition of the specimens were determined using XRD. Petrological study was done, as well.The mineralogical composition of most nodules consisted of barite-calcite of various percentages. The nodules at northern part of studied region consisted of barite or barite-calcite, turned into calcite or calcite-barite phases towards south.
References used
ABIDI, R.; SHIMI, N.S.; MARIGANC, C.; HATIRA, N.; GASQUET, D.; RENAC, C.; SOUMARIN, A.; GLEESON, S. The origin of sulfate mineralization and the nature of the BaSO4-SrSO4 solid-solution series in the AinAllega and El Aguibaoredeposites, NorthenTunisia.Ore Geology Reviews. VOL. 48, NO. 10, 2012, 165-179
SUGITANI, K.; YAMASHITA, F.; NAGAOKA, T.; YAMAMOTO, K.; MINAMI, M.; MIMURA, K.; SUZUKI, K. Geochimistry and sedimentary petrology of Archeanclastic sedimentary rocks at Mt. Goldsworthly, Pilbara Craton, Western Australia: Evidence for the early evolution of continental crust and hydrothermal alteration. Precambrian Research. VOL. 147, NO. 2006, 124-147
SHIELDS, G. A.; DEYNOUX, M.; STRAUSS, H.; PAQUET, H.; NAHON, D.Barite-bearing cap dolostone of the Taoudeni Basin, northwest Africa: Sedimentary and isotopic evidence seepage after a Neoproterozoicglaciation. Precambrian Research. VOL. 153, NO. 3 , 2007, 209-235
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Zeolite bearing deposits were characterized in Banyas region using sample A
(which is a powdered mixture taken from five tuff and tuffite levels) compared with
sample B (which is taken from Basatin Al-Assad site within the studied region).
XRD met
hod showed several zeolite phases in addition to non-zeolite minerals
and volcanic glass. FTIR method revealed a general feature of zeolite groups. DTA
method showed a range within zeolite structure stability. Specific surface area was
measured using BET method giving the value 87m2/g. The range of pore volume
distribution was also calculated with ~40Ǻ, and intermediate pore diameter of ~23Ǻ.
XRD study of the standard sample (B) showed slightly different zeolite phases
from A. FTIR measurement showed same results as in A. DTA plots revealed a high
stability of sample B, SBET of 61m2/g, VP around 40Ǻ and r- at ~25Ǻ.
The study was conducted in four sites belonging to the Sheikh Badr district in Tartous
province. Ten different types were identified according to international standards. During
the 2016 and 2017 growth seasons, readings were recorded for phenotypi
c parameters as
well as physical and chemical analysis of fruit clusters. The studied types differed in many
characteristics. The results of the cluster analysis showed the distribution of the studied
types in two groups with a variance of 93%. The mean weight of the cluster varied
between the medium (349 g) and the large (1140.45 g). The ratio of total dissolved solids
(TSS) between the low (12.75%) and high (18.82%). the acidity between the very low
(3.53 g/l) and medium (6.38 g/l).
This study aimed to investigate the characteristics of soils developed on volcanic ash in an area with a Mediterranean soil moisture regime to determine the presence or absence of amorphous minerals in these soils.
يعد الميتانول و الإيتانول من أكثر المحلات شيوعاً، و بما أن درجة غليانها أقل من مئة
درجة مئوية فإنها تتطاير بشكل سريع. و على سبيل المثال، يستعمل الميتانول في تصنيع
الأصبغة و العقاقير و العطور.. و هو شديد السمية، لذلك من الضروري تطوير محسات لكشفه.
أ
ما غاز الأمونيا فهو من ملوثات الهواء و له مصادر كثيرة مثل صناعة الأسمدة و أنظمة
التبريد.. و من هنا أهمية كشفه.
The present research aims at synthesizing micro-porous and fluorescent polymer by microwave assisted synthesis allowing to reduce preparation time of 3 days at 180 °C using conventional method.
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