Pub Date : 2012-12-28DOI: 10.33899/earth.2012.64510
Y. F. Eclimes, Marwan Mutib
{"title":"Study of The Subsurface Fractures in Ayn-Sfni Plain/North Iraq from Azimuthal Resistivity Data","authors":"Y. F. Eclimes, Marwan Mutib","doi":"10.33899/earth.2012.64510","DOIUrl":"https://doi.org/10.33899/earth.2012.64510","url":null,"abstract":"","PeriodicalId":371191,"journal":{"name":"Iraqi National Journal of Earth Sciences","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114823535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-12-28DOI: 10.33899/earth.2012.64522
Majid M. Al-Mutwali Mazin A. AL-Doori
ABSITRACT The litho-and biostratigraphy of Shiranish Formation have been investigated within a well-exposed section at the southern limb of Bekhair anticline, Dohuk area, Northern Iraq. The studied section consists mainly of marl, marly limestone, and limestone. The Formation unconformably overlies Bekhme Formation and it is overlain unconformably by the Kolosh Formation. The samples of the section under investigation yielded rich and well diversified planktonic foraminiferal taxa, where 55 planktonic species belonging to 16 genera have been recognized, the detailed foraminiferal investigation permits the recognition of 8 well defined zones. These are from older at the base:
{"title":"Planktonic Foraminiferal Biostratigraphy of Shiranish Formation in Dohuk Area/ Northern Iraq","authors":"Majid M. Al-Mutwali Mazin A. AL-Doori","doi":"10.33899/earth.2012.64522","DOIUrl":"https://doi.org/10.33899/earth.2012.64522","url":null,"abstract":"ABSITRACT The litho-and biostratigraphy of Shiranish Formation have been investigated within a well-exposed section at the southern limb of Bekhair anticline, Dohuk area, Northern Iraq. The studied section consists mainly of marl, marly limestone, and limestone. The Formation unconformably overlies Bekhme Formation and it is overlain unconformably by the Kolosh Formation. The samples of the section under investigation yielded rich and well diversified planktonic foraminiferal taxa, where 55 planktonic species belonging to 16 genera have been recognized, the detailed foraminiferal investigation permits the recognition of 8 well defined zones. These are from older at the base:","PeriodicalId":371191,"journal":{"name":"Iraqi National Journal of Earth Sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130329182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-28DOI: 10.33899/earth.2012.36299
Nazar A. Al-Mola, Amer D. Nader
Two new distinctive species of acritarchs belonging to genus Fractoricoronula are described from strata of Late Ordovician Epoch in borehole Khleisia–1 in Iraq. These are Fractoricoronula densa sp.nov. and Fractoricoronula khabouri sp.nov. ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ـــــــــــــــــــــــــــ فصو ن كراتيركلأا نم نيديدج نيعو ا نم قا رعلا يف يشيفودرولأ رماع ردان دؤاد دبع را زن ىلوملا دحاولا ضرلأا مومع مسق مومعلا ةيمك لصوملا ةعماج صخلملا طممم و ممم ار ةوممم لأ ر ممماوعت لممم للأسممملأس لوحطممم عمممجنن عونممموو فمممترةسار لا مممش ممماإ نمممجار Fractoricoronula هو واخ ئب ف اح ر شوفن ةنلار ةطخج ل – 1 ر ار ف ق و هن : sp.nov. Fractoricoronula densa ن Fractoricoronula khabouri sp.nov. ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ـــــــــــــــــــــــــــ INTRODUTION The oldest rock unit exposed in northern Iraq is the Ordovician Khabour Formation which crops out in narrow limited zone in the core of Ora, Chalki and Kaista anticlines in north and northwestern Amadia district (Bellen et al., 1959). In the western side of Iraq the oldest rock unit exposed is the Ga'ara Formation (Late Carboniferous – Permian) in the Ga'ara depression. Due to the limited outcrops exposure the information about the Paleozoic Formations were obtained from the deep wells, which drilled in the area between Khleisia and Mosul city and the studied well is one of these (Fig. 1). The studied Amer D. Nader and Nazar A. Al-Mola 99 samples were collected from borehole Khleisia–1, which is located at 35° 21.3 ̋N,41° 18 ̋E at Khleisia anticline northwestern Iraq, the total depth of the well is (3791.4m.) and the studied section is between depths (3400.0 2543.5m) penetrating Khabour Formation (Fig. 2). The Paleozoic sedimentary strata fall into three characteristic major sedimentary cycles, separated by relatively major breaks, indicating the effects of the Caledonian and Hercynian orogeneses. One of these cycles is the Cambrian – Ordovician – (?Silurian) cycle represented in Iraq mainly by the Khabour Formation (Buday, 1980). Bellen et al., 1959 and other earlier authors included the Pirispiki Red Beds and Chalki Volcanics in this cycle (Buday, 1980). Seilacher, 1963 in Buday, 1980 proved that Pirispiki Red Beds and Chalki Volcanics belong to the next cycle (Devonian – Lower Carboniferous) cycle and were deposited after the Caledonian uplifted. Fig. 1. Locality Map Showing the Location of the Studied borehole Khleisia – 1. Two new species of acritarchs from the Ordovician of Iraq 99 Fig. 2: The Studied Stratigraphic Succession of Borehole Khleisia –1. Amer D. Nader and Nazar A. Al-Mola 99 STRATIGRAPHY The Khabour Formation was first defined by Wetzel, 1950 in van Bellen et al., 1959 in the northern thrust zone, which named after the Khabour river in the vicinity of Amadia district, north of Iraq. The exposed
{"title":"Two New Species of Acritarchs From the Ordovician of Iraq","authors":"Nazar A. Al-Mola, Amer D. Nader","doi":"10.33899/earth.2012.36299","DOIUrl":"https://doi.org/10.33899/earth.2012.36299","url":null,"abstract":"Two new distinctive species of acritarchs belonging to genus Fractoricoronula are described from strata of Late Ordovician Epoch in borehole Khleisia–1 in Iraq. These are Fractoricoronula densa sp.nov. and Fractoricoronula khabouri sp.nov. ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ـــــــــــــــــــــــــــ فصو ن كراتيركلأا نم نيديدج نيعو ا نم قا رعلا يف يشيفودرولأ رماع ردان دؤاد دبع را زن ىلوملا دحاولا ضرلأا مومع مسق مومعلا ةيمك لصوملا ةعماج صخلملا طممم و ممم ار ةوممم لأ ر ممماوعت لممم للأسممملأس لوحطممم عمممجنن عونممموو فمممترةسار لا مممش ممماإ نمممجار Fractoricoronula هو واخ ئب ف اح ر شوفن ةنلار ةطخج ل – 1 ر ار ف ق و هن : sp.nov. Fractoricoronula densa ن Fractoricoronula khabouri sp.nov. ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ـــــــــــــــــــــــــــ INTRODUTION The oldest rock unit exposed in northern Iraq is the Ordovician Khabour Formation which crops out in narrow limited zone in the core of Ora, Chalki and Kaista anticlines in north and northwestern Amadia district (Bellen et al., 1959). In the western side of Iraq the oldest rock unit exposed is the Ga'ara Formation (Late Carboniferous – Permian) in the Ga'ara depression. Due to the limited outcrops exposure the information about the Paleozoic Formations were obtained from the deep wells, which drilled in the area between Khleisia and Mosul city and the studied well is one of these (Fig. 1). The studied Amer D. Nader and Nazar A. Al-Mola 99 samples were collected from borehole Khleisia–1, which is located at 35° 21.3 ̋N,41° 18 ̋E at Khleisia anticline northwestern Iraq, the total depth of the well is (3791.4m.) and the studied section is between depths (3400.0 2543.5m) penetrating Khabour Formation (Fig. 2). The Paleozoic sedimentary strata fall into three characteristic major sedimentary cycles, separated by relatively major breaks, indicating the effects of the Caledonian and Hercynian orogeneses. One of these cycles is the Cambrian – Ordovician – (?Silurian) cycle represented in Iraq mainly by the Khabour Formation (Buday, 1980). Bellen et al., 1959 and other earlier authors included the Pirispiki Red Beds and Chalki Volcanics in this cycle (Buday, 1980). Seilacher, 1963 in Buday, 1980 proved that Pirispiki Red Beds and Chalki Volcanics belong to the next cycle (Devonian – Lower Carboniferous) cycle and were deposited after the Caledonian uplifted. Fig. 1. Locality Map Showing the Location of the Studied borehole Khleisia – 1. Two new species of acritarchs from the Ordovician of Iraq 99 Fig. 2: The Studied Stratigraphic Succession of Borehole Khleisia –1. Amer D. Nader and Nazar A. Al-Mola 99 STRATIGRAPHY The Khabour Formation was first defined by Wetzel, 1950 in van Bellen et al., 1959 in the northern thrust zone, which named after the Khabour river in the vicinity of Amadia district, north of Iraq. The exposed ","PeriodicalId":371191,"journal":{"name":"Iraqi National Journal of Earth Sciences","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123333204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-28DOI: 10.33899/earth.2012.36280
Seham I. Al-Azzo, Azealdeen S. Al-Jawadi, Hadeer G. M. Adeeb
{"title":"Geotechnical Maps of West and Pump Canals and their Branches of the Southern Jazirah Irrigation Project – NW Iraq","authors":"Seham I. Al-Azzo, Azealdeen S. Al-Jawadi, Hadeer G. M. Adeeb","doi":"10.33899/earth.2012.36280","DOIUrl":"https://doi.org/10.33899/earth.2012.36280","url":null,"abstract":"","PeriodicalId":371191,"journal":{"name":"Iraqi National Journal of Earth Sciences","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130137987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-28DOI: 10.33899/earth.2012.36303
Nisreen M. Aziz
Six Ostracode species belonging to the Trachyleberididae and Xestoleberididae are recorded for first time from Avanah Formation (M.Eocene), Dohuk area, Northern Iraq.These species are: Uroleberis globosa Ducasse 1967, Uroleberis sp., Acanthocythereis (Canthylocythereis) heijranensis sp. nov. Acanthocythereis (Canthylocythereis) sp., Acanthocythereis (Canthylocythereis) alacer Al-Furaih 1992, and Anommatocythereis beserensis sp. nov.
{"title":"On Some Ostracode Species of the Avanah Formation from Dohuk Area N. Iraq","authors":"Nisreen M. Aziz","doi":"10.33899/earth.2012.36303","DOIUrl":"https://doi.org/10.33899/earth.2012.36303","url":null,"abstract":"Six Ostracode species belonging to the Trachyleberididae and Xestoleberididae are recorded for first time from Avanah Formation (M.Eocene), Dohuk area, Northern Iraq.These species are: Uroleberis globosa Ducasse 1967, Uroleberis sp., Acanthocythereis (Canthylocythereis) heijranensis sp. nov. Acanthocythereis (Canthylocythereis) sp., Acanthocythereis (Canthylocythereis) alacer Al-Furaih 1992, and Anommatocythereis beserensis sp. nov.","PeriodicalId":371191,"journal":{"name":"Iraqi National Journal of Earth Sciences","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114360971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-28DOI: 10.33899/earth.2012.36277
Ibraheem R. Baddi, Zeki A. Aljubouri
The mineralogy, petrography and chemistry of two local plasters (Rasheed and Madae'n) and a dental stone were studied. Mineralogical study by x-ray diffraction spectrometer proved that the three gypsum products consist mainly of bassanite or hemihydrate (CaSO4. 0.5 H2O) with minor amounts of gypsum and anhydrite. The petrography of the studied thin sections, reveals that the two local plasters consist of dispersed prismatic, monoclinic crystals with ill-defined edges (bassanite of the β-hemihydrate). Dental stone consists of more packed, prismatic monoclinic crystals with well-defined and sharp edges (bassanite of the α–hemihydrate). Compressed powders of the two local plasters improved their crystal shapes and edges and made their outlines similar to dental stone or (α–hemihydrate). Chemical analyses of Rasheed and Madae'n plasters suggest that they consist of more than (96%) bassanite with small amounts of gypsum and anhydrite. Based on these compositions, the two local plasters are suitable for moulding, casting and constructional purposes. They are unsuitable for surgical plasters. ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ــــــــــــــــــــــ ةيندعم يمحملا رتسلابلا نم نيعون ةيئايميكو ةيفا رغورتبو يروبجلا رابجلا دبع يكز ميها ربإ يدب ديشر ضرلأا مومع مسق ةيطفنلا تافاشكتسلاا ةكرش مومعلا ةيمك ا ةرا زو طفنل لصوملا ةعماج قا رعلا ،دادغب صخمملا مم ملا سبمجلاا رتمسلبلا نم نيعومن ةمينايميكو ةميفا رفورتبو ةميندعم ةمسا رد ممت ننادم لاو ديمشرلا رمج و ةدنا لا ةينيسلا ةعشلأا زايج ةطساوب ةيندعملا ةسا ردلا ت ضوأ .نانسلاا ا XRD ) نإ ةمثلثلا موسبجلا جتاون .تممميا رياينلااو مومممسبجلا نممم ةمممميمق تاممميمك رممم تيا ردمممياييميى وأ تيانمممساب ندمممعم نممم ةمممسينر ةرومممصب نومممكتت Zeki A. Aljubouri and Ibraheem R. Baddi 2 ةدمعابتم تا روممب نم نانوكتي م ملا رتسلبلا عون نأب جتاونلا هذى قي اسمل ةيفا رفورتبلا ةسا ردلا ت ضوأو تنم رمميف تاممفا تاذو لمميملا ةمميدا ا ةيروممشوم عوممن نمم تيانممسابا ةمم ظ β-hemihydrate ) . رممج نوممكتيو نمممم نانممممسلأا عوممممن نمممم تيانممممسابا ةمممم ظتنم تاممممفا تاذو اممممصا رت رممممثكا لمممميملا ةمممميدا ا ةيروممممشوم تا رومممممب α– hemihydrate لاكمشلأا نا نيمبت ، مم ملا رتمسلبلا نم نيعومنلا قو مسم سممع نيمعم طغمض طيمست دعبو . اممفا لاو امم اظتنا رممثكا ت بممصا ةمميرومبلا وبممشت تا رومممبلا هذممى نأو طاغممضنلاا ةمميممع لممبق امم م ا وممضو رممثكا ت نم ةبيرقو نانسلأا رج تا رومب ( α–hemihydrate .) ربكا ةبسنب تيانساب ندعم نم نانوكتي امينأب ننادملاو ديشرلا رتسلبل ةينايميكلا ليلا تلا ت ضوأو ( نم %96 ) مع ادامتعاو تيا ردياينلأاو موسبجلا نم ةميمق ةيمك رم نيعونلا نيذى نإف نايميكلا بيكرتلا س ةبلوقلا لامعلأ نا مصي رتسلبلا نم بصلاو ( moulding and casting كلذك ءانبلا لامعأو لاو ، ا ا رجلا رتسلبلا لامعتسلا نا مصي surgical plaster . ــــــــــــــــــــــــــــــــــــــــــــــــ ـــــــــــــــــــــــــــــــ ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ـــــــــ ـ INTRODUCTION A plaster is a calcined gypsum produced by heating the powdered raw m
{"title":"Mineralogy, Petrography and Chemistry of Two Local Plasters, Iraq","authors":"Ibraheem R. Baddi, Zeki A. Aljubouri","doi":"10.33899/earth.2012.36277","DOIUrl":"https://doi.org/10.33899/earth.2012.36277","url":null,"abstract":"The mineralogy, petrography and chemistry of two local plasters (Rasheed and Madae'n) and a dental stone were studied. Mineralogical study by x-ray diffraction spectrometer proved that the three gypsum products consist mainly of bassanite or hemihydrate (CaSO4. 0.5 H2O) with minor amounts of gypsum and anhydrite. The petrography of the studied thin sections, reveals that the two local plasters consist of dispersed prismatic, monoclinic crystals with ill-defined edges (bassanite of the β-hemihydrate). Dental stone consists of more packed, prismatic monoclinic crystals with well-defined and sharp edges (bassanite of the α–hemihydrate). Compressed powders of the two local plasters improved their crystal shapes and edges and made their outlines similar to dental stone or (α–hemihydrate). Chemical analyses of Rasheed and Madae'n plasters suggest that they consist of more than (96%) bassanite with small amounts of gypsum and anhydrite. Based on these compositions, the two local plasters are suitable for moulding, casting and constructional purposes. They are unsuitable for surgical plasters. ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ــــــــــــــــــــــ ةيندعم يمحملا رتسلابلا نم نيعون ةيئايميكو ةيفا رغورتبو يروبجلا رابجلا دبع يكز ميها ربإ يدب ديشر ضرلأا مومع مسق ةيطفنلا تافاشكتسلاا ةكرش مومعلا ةيمك ا ةرا زو طفنل لصوملا ةعماج قا رعلا ،دادغب صخمملا مم ملا سبمجلاا رتمسلبلا نم نيعومن ةمينايميكو ةميفا رفورتبو ةميندعم ةمسا رد ممت ننادم لاو ديمشرلا رمج و ةدنا لا ةينيسلا ةعشلأا زايج ةطساوب ةيندعملا ةسا ردلا ت ضوأ .نانسلاا ا XRD ) نإ ةمثلثلا موسبجلا جتاون .تممميا رياينلااو مومممسبجلا نممم ةمممميمق تاممميمك رممم تيا ردمممياييميى وأ تيانمممساب ندمممعم نممم ةمممسينر ةرومممصب نومممكتت Zeki A. Aljubouri and Ibraheem R. Baddi 2 ةدمعابتم تا روممب نم نانوكتي م ملا رتسلبلا عون نأب جتاونلا هذى قي اسمل ةيفا رفورتبلا ةسا ردلا ت ضوأو تنم رمميف تاممفا تاذو لمميملا ةمميدا ا ةيروممشوم عوممن نمم تيانممسابا ةمم ظ β-hemihydrate ) . رممج نوممكتيو نمممم نانممممسلأا عوممممن نمممم تيانممممسابا ةمممم ظتنم تاممممفا تاذو اممممصا رت رممممثكا لمممميملا ةمممميدا ا ةيروممممشوم تا رومممممب α– hemihydrate لاكمشلأا نا نيمبت ، مم ملا رتمسلبلا نم نيعومنلا قو مسم سممع نيمعم طغمض طيمست دعبو . اممفا لاو امم اظتنا رممثكا ت بممصا ةمميرومبلا وبممشت تا رومممبلا هذممى نأو طاغممضنلاا ةمميممع لممبق امم م ا وممضو رممثكا ت نم ةبيرقو نانسلأا رج تا رومب ( α–hemihydrate .) ربكا ةبسنب تيانساب ندعم نم نانوكتي امينأب ننادملاو ديشرلا رتسلبل ةينايميكلا ليلا تلا ت ضوأو ( نم %96 ) مع ادامتعاو تيا ردياينلأاو موسبجلا نم ةميمق ةيمك رم نيعونلا نيذى نإف نايميكلا بيكرتلا س ةبلوقلا لامعلأ نا مصي رتسلبلا نم بصلاو ( moulding and casting كلذك ءانبلا لامعأو لاو ، ا ا رجلا رتسلبلا لامعتسلا نا مصي surgical plaster . ــــــــــــــــــــــــــــــــــــــــــــــــ ـــــــــــــــــــــــــــــــ ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ـــــــــ ـ INTRODUCTION A plaster is a calcined gypsum produced by heating the powdered raw m","PeriodicalId":371191,"journal":{"name":"Iraqi National Journal of Earth Sciences","volume":"299 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128617486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-28DOI: 10.33899/earth.2012.36289
Namik A. Daood, Waleed Y. Alubide
{"title":"Using Remote Sensing Techniques on the Study of Desertification and the Sand Dunes Movements in Biji Area Northern Iraq","authors":"Namik A. Daood, Waleed Y. Alubide","doi":"10.33899/earth.2012.36289","DOIUrl":"https://doi.org/10.33899/earth.2012.36289","url":null,"abstract":"","PeriodicalId":371191,"journal":{"name":"Iraqi National Journal of Earth Sciences","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126857033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-28DOI: 10.33899/earth.2012.36293
Mohsen S. Dawlat, Rabeea Kh. Al-Hamdani, Hadeer Gh. M. Adeeb, Ibrahim S. Al-Jumaily
{"title":"Structural Analysis and Tectonic Interpretation of Brittle Failure Structures at Perat Anticline – NE Iraq","authors":"Mohsen S. Dawlat, Rabeea Kh. Al-Hamdani, Hadeer Gh. M. Adeeb, Ibrahim S. Al-Jumaily","doi":"10.33899/earth.2012.36293","DOIUrl":"https://doi.org/10.33899/earth.2012.36293","url":null,"abstract":"","PeriodicalId":371191,"journal":{"name":"Iraqi National Journal of Earth Sciences","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114398693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-28DOI: 10.33899/earth.2012.36296
Nawrast S. Al-Ayobi, Sattar J. Al-Khafaji, Abdul Aziz M. Al-Hamdani
It appears that the tectonism throughout early middle Miocene played an important role in the variations and distribution of facies zones within Jeribe basin. Although, the ينادمحلا دومحم زيزعلادبع يجافخلا رابج راتس يبويلأا حابص تسرون ضرلأا موم مسق مومعلا ةيمك لصوملا ةعماج ضرلأا موم مسق مومعلا ةيمك ر صبلا ةعماج نادمحلا دومحم ي علادب نورخآ و 31 domination of the lagoonal influences within the most studied exposed succession; microfacies analysis revealed the influences of many other shallow environmental zones. Intermittent tectonic uplifts in basement blocks are reflected by successive secondary marine regressions toward the center of the basin in Sheikh-Ibrahim area. However, this regression had led to the termination of the Jeribe successions at studied area. This is represented at study area by a thick development of tidal flat facies overlain by a fresh lake facies at eastern parts; however it is exclusively represented by a thin bed of tidal flat facies at the western parts. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ
{"title":"Microfacies and Depositional Model Jeribe Formation (Early Middle Miocene), Northwestern of Iraq","authors":"Nawrast S. Al-Ayobi, Sattar J. Al-Khafaji, Abdul Aziz M. Al-Hamdani","doi":"10.33899/earth.2012.36296","DOIUrl":"https://doi.org/10.33899/earth.2012.36296","url":null,"abstract":"It appears that the tectonism throughout early middle Miocene played an important role in the variations and distribution of facies zones within Jeribe basin. Although, the ينادمحلا دومحم زيزعلادبع يجافخلا رابج راتس يبويلأا حابص تسرون ضرلأا موم مسق مومعلا ةيمك لصوملا ةعماج ضرلأا موم مسق مومعلا ةيمك ر صبلا ةعماج نادمحلا دومحم ي علادب نورخآ و 31 domination of the lagoonal influences within the most studied exposed succession; microfacies analysis revealed the influences of many other shallow environmental zones. Intermittent tectonic uplifts in basement blocks are reflected by successive secondary marine regressions toward the center of the basin in Sheikh-Ibrahim area. However, this regression had led to the termination of the Jeribe successions at studied area. This is represented at study area by a thick development of tidal flat facies overlain by a fresh lake facies at eastern parts; however it is exclusively represented by a thin bed of tidal flat facies at the western parts. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ","PeriodicalId":371191,"journal":{"name":"Iraqi National Journal of Earth Sciences","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115943541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-28DOI: 10.33899/earth.2012.36284
Nawal M. A. Othman, Ibrahim S. Aljumaily
The present study involves different aspect of brittle failure structures at Spi Res Anticline within the foreland fold belt of north Iraq. It aims to decipher whether the late Cretaceous orogenic episode has any fracturing consequence to the rock sequence of this period at investigated area. This was accomplished by comparison of various fracture modes between Upper Cretaceous and Tertiary rock sequence exposed at studied area. The study area is prevailed with widespread joints and tabular veins, little mesoscopic faults and scarce of pressure solution surfaces (stylolite). Joint analysis showed two extensional sets (ac and bc) and three shear systems (hko, hol and okl). However, hko acute about a and b system was prevailed and followed by ac and bc sets. The openings of most of joint sets were filled later by calcareous or siliceous precipitations without any kinematic indications, some refers to extension normal with vein walls and for a single growth episode. A little number of striated mesoscopic faults were registered throughout both Cretaceous and Tertiary rocks in study area. Most of them are reverse, others are normal and strike slip. Further, two sets of stylolite seams were found scarcely, peaks of the first oriented parallel with the bedding dip, whereas those of the other set trended parallel to bedding strike. The kinematic analysis of mesoscopic faults and shear joints in study area gave a number of compressive and strike slip stress tensors. The maximum horizontal stress (δmax ) of these tensors lie in N-S, NE-SW, E-W and NW-SE general trends. Accordingly, they were organized into two compressive tectonic regimes. One representing the component normal to the orogenic front, acted in N-S and NE-SW directions. Whereas the other representing the component parallel with the orogenic front, acted in E-W and NW-SE directions. Both components were resulted from oblique collision of Arabian and Eurasian plates. However, these two compressive tectonic regimes are supported by a couple sets of stylolites with their peaks either normal or parallel to the trend of Spi Res Anticline. No brittle failure structures belonging to orogenic episode of Ibrahim S. Aljumaily and Nawal M. Othman 33 Late Cretaceous were recognized in the Upper Cretaceous succession of study area in the present investigation.
本研究涉及伊拉克北部前陆褶皱带Spi Res背斜脆性破坏构造的不同方面。目的是了解晚白垩世造山期对研究区这一时期的岩石层序是否有压裂作用。通过对比研究区上白垩统与第三系岩石层序的各种断裂模式，得出了上述结论。研究区节理、板状脉分布广泛，介观断裂较少，压力溶出面(柱面岩)较少。节理分析显示:2个伸展体系(ac和bc)和3个剪切体系(hko、hol和okl)。然而，香港天文台以a和b系统为主，其次是ac和bc系统。大多数关节组的开口后来被钙质或硅质沉淀物填满，没有任何运动学迹象，有些是指与静脉壁正常延伸和单一生长期。研究区白垩系和第三系岩石均发现少量的条状介观断裂。大多数是反向的，其他是正常的和走滑的。两组缝合线几乎未发现，第一组缝合线的峰值方向与层理倾角平行，另一组缝合线的峰值方向与层理走向平行。通过对研究区介观断裂和剪切节理的运动学分析，得到了若干张量的压滑和走滑应力。这些张量的最大水平应力(δmax)分布在N-S、NE-SW、E-W和NW-SE总走向上。据此，将其划分为两个挤压构造区。一个代表垂直于造山锋的分量，作用于北—南、北—南—西两个方向。另一个则代表与造山锋平行的分量，在东西和北西-东南方向上活动。这两个组成部分都是阿拉伯板块和欧亚板块斜碰撞的结果。然而，这两种挤压构造体制均由几组与Spi Res背斜走向正相关或平行的柱化岩支撑。本研究在研究区上白垩统序列中未发现Ibrahim S. Aljumaily和Nawal M. Othman 33晚白垩世造山期脆性破坏构造。
{"title":"Structural Analysis of Brittle Failure Structures in Spi Res Anticline - Northern Iraq","authors":"Nawal M. A. Othman, Ibrahim S. Aljumaily","doi":"10.33899/earth.2012.36284","DOIUrl":"https://doi.org/10.33899/earth.2012.36284","url":null,"abstract":"The present study involves different aspect of brittle failure structures at Spi Res Anticline within the foreland fold belt of north Iraq. It aims to decipher whether the late Cretaceous orogenic episode has any fracturing consequence to the rock sequence of this period at investigated area. This was accomplished by comparison of various fracture modes between Upper Cretaceous and Tertiary rock sequence exposed at studied area. The study area is prevailed with widespread joints and tabular veins, little mesoscopic faults and scarce of pressure solution surfaces (stylolite). Joint analysis showed two extensional sets (ac and bc) and three shear systems (hko, hol and okl). However, hko acute about a and b system was prevailed and followed by ac and bc sets. The openings of most of joint sets were filled later by calcareous or siliceous precipitations without any kinematic indications, some refers to extension normal with vein walls and for a single growth episode. A little number of striated mesoscopic faults were registered throughout both Cretaceous and Tertiary rocks in study area. Most of them are reverse, others are normal and strike slip. Further, two sets of stylolite seams were found scarcely, peaks of the first oriented parallel with the bedding dip, whereas those of the other set trended parallel to bedding strike. The kinematic analysis of mesoscopic faults and shear joints in study area gave a number of compressive and strike slip stress tensors. The maximum horizontal stress (δmax ) of these tensors lie in N-S, NE-SW, E-W and NW-SE general trends. Accordingly, they were organized into two compressive tectonic regimes. One representing the component normal to the orogenic front, acted in N-S and NE-SW directions. Whereas the other representing the component parallel with the orogenic front, acted in E-W and NW-SE directions. Both components were resulted from oblique collision of Arabian and Eurasian plates. However, these two compressive tectonic regimes are supported by a couple sets of stylolites with their peaks either normal or parallel to the trend of Spi Res Anticline. No brittle failure structures belonging to orogenic episode of Ibrahim S. Aljumaily and Nawal M. Othman 33 Late Cretaceous were recognized in the Upper Cretaceous succession of study area in the present investigation.","PeriodicalId":371191,"journal":{"name":"Iraqi National Journal of Earth Sciences","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129753319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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