scholarly journals Stratigraphy and Nannofossil Biozonation of Sarmord Formation on the Qaywan Anticline in Sulaymaniyah Governorate, Northern Iraq

2021 ◽  
Vol 54 (2D) ◽  
pp. 75-86
Author(s):  
Kamal Haji Karim
Keyword(s):  
Calcareous Nannofossils ◽  
Laboratory Studies ◽  
Northern Iraq

The Sarmord Formation is one of the overlooked formations that require more investigations than that achieved before. There are many problems in its definition, age, stratigraphy and aerial distribution. Previously in most parts of the Sulaymaniyah, it is not mapped and its outcrops combined with Balambo Formation while in the present study it is differentiated, mapped in the field on the Qaywan anticline and its problems discussed in details with a suggestion of solutions. For laboratory studies, 31 samples are taken on the Qywan Mountain (anticline) at 23 km north of the Sulaimani city for nannofossils biozonation. This study identified 19 species of the recorded calcareous nannofossils, the studied section reveals three biozones arranged from oldest to youngest as follows: Cretarhabdus loriei Interval Biozone, Lithraphidites bollii Interval Biozone, Micrantholithus hoschulzii Interval Biozone. These nannobiozones are correlated with other calcareous nannofossils biozones from both local and regional sections leading to conclude the age of Late Valanganian to Barremian.

RESPONSE OF CALCAREOUS NANNOPLANKTON TO PALEOCENE–EOCENE THERMAL MAXIMUM IN NORTHERN IRAQ

2020 ◽  
Vol 02 (01) ◽  
pp. 2050001
Author(s):  
RAGHDA SAAD AL-HYALY ◽  
OMAR AHMED AL-BADRANI
Keyword(s):  
Global Warming ◽  
Calcareous Nannofossils ◽  
Calcareous Nannoplankton ◽  
Geological Record ◽  
Northern Iraq ◽  
Thermal Maximum

The Paleocene–Eocene Thermal Maximum (PETM) was an abrupt global warming event in the geological record. Based on calcareous nannofossils from thirteen samples of Aaliji Formation from K-116 well, Northern Iraq, sixty species are identified and can be used to divide the studied section into five biozones. Especially, the transition in the Discoaster multiraditus Biozone (CP8) occurred which is marked by higher speciation for calcareous nannofossils and the occurrences of Discoaster Tan. Such atransition is closely related to global warming during the transition from Paleocene to Eocene.

scholarly journals Calcareous Nannofossils Biostratigraphy of Tanjero Formation at Azmer anticline Northern Iraq

2021 ◽  
pp. 1605-1621
Author(s):  
Rahme Fares Al-Sulevani ◽  
Omar Ahmed Al-Badrani
Keyword(s):  
Calcareous Nannofossils ◽  
Calcareous Nannofossil ◽  
Northern Iraq

Seventy three species of calcareous nannofossils are recorded from the studied section of Tanjero Formation at Azmer anticline, Sulimaniya, Northern Iraq. The studied section reveals four  biozones arranged in an ascending order  from oldest to youngest as follows; Tranolithus phacelosus Interval Biozone (CC23) Part, Rienhardtites lives Interval  Biozone (CC24), Arkhangelskilla cymbiformis Interval Biozone (CC25), and Nephrolithus frequens Rang Biozone (CC26) Part. These biozones are correlated with other calcareous nannofossil biozones of both local and regional sections, leading to conclude a possible age of  Late Campanian- Maastrichtian.

scholarly journals PALEOCLIMATIC INSIGHTS ON THE CENOMANIAN-TURONIAN OCEANIC ANOXIC EVENT (OAE2) FROM NORTHERN IRAQ BASED ON CALCAREOUS NANNOFOSSILS AND GEOCHEMICAL DATA

2020 ◽  
Vol 53 (2C) ◽  
pp. 68-86
Author(s):  
Safwan Al-Lhaebi
Keyword(s):  
Trace Elements ◽  
Climatic Condition ◽  
Geochemical Data ◽  
Calcareous Nannofossils ◽  
Calcareous Nannofossil ◽  
X Ray Diffraction ◽  
X Ray ◽  
Northern Iraq ◽  
Oceanic Anoxic Event ◽  
Anoxic Event

Calcareous nannofossils, mineralogical and geochemical investigations are carried out on the Cenomanian-Turonian boundary of the Gulneri Formation in the Azmir, Dokan and Degala sections, northern Iraq. Regarding the calcareous nannofossil data CC11 and CC12 biozones were identified. A detailed investigation was carried out to identify calcareous nannofossils species. On the basis of their stratigraphic distribution, two biozones were proposed in this study; Quadrum gartneri Interval Biozone (CC11) part and Lucianrhabdus maleformis Interval Biozone (CC12) part. Correlation with other calcareous nannofossils biozones from regional schemes led to conclude that the age of the Gulneri Formation in the studied sections is the early Turonian. Mineralogical (X-ray diffraction XRD) and trace elements geochemistry (X-ray fluorescence XRF) data along with the dominance of calcareous nannofossil Watznauria that indicates warm and arid climatic condition prevailing in the Cenomanian-Turonian transition.

scholarly journals Stratigraphic And Microfacies Study Of Upper Campanian - Lower Maastrichtian Succession (Shiranish Formation) In Bade Village, Bekhere Anticline, Kurdistan Region, Northern Iraq

2021 ◽  
Vol 71 ◽  
pp. 47-55
Author(s):  
Zaid A. Malak ◽  
◽  
Omar A. Al-Badrani ◽  
Ezzat I. Al-Fandi
Keyword(s):  
Planktonic Foraminifera ◽  
Calcareous Nannofossils ◽  
Kurdistan Region ◽  
Planktic Foraminifera ◽  
Thin Sections ◽  
Northern Iraq ◽  
Lower Maastrichtian ◽  
Marly Limestone ◽  
Quartz Grains ◽  
Upper Campanian

The Upper Cretaceous Shiranish Formation outcropped close to Bade village and Bekhere anticline, Kurdistan region at northern Iraq and consists of alternating mixed tough grey limestone, marly limestone, marl beds interpreted as a middle - outer shelf – upper bathyal environments (basinal) depositional environment. Fifteen thin sections were studied under a polarized microscope to find out the petrographic component, fauna content, and for microfacies analysis. The major petrographic constituents are fossils, bioclastic grains, micrite matrix, and extraclast (quartz grains). Planktic foraminifera and nannofossils are the major particles within wackestone and packstone microfacies types. The planktonic foraminifera biozones from previous study (such as Globotruncana aegyptiaca, Gansserina gansseri, Racemiguembelina fructicosa, Plummerita hantkeninoides) and the recorded calcareous nannofossils biozones of Broinsonia parca, Reinhardtites levis, Arkhangelskiella cymbiformis, suggest a late Campanian to late Maastrichtian age.

scholarly journals CALCAREOUS NANNOFOSSILS AND CHEMOSTRATIGRAPHY OF THE EARLY APTIAN OCEANIC ANOXIC EVENT 1A FROM NORTHERN IRAQ

2020 ◽  
Vol 16 (1) ◽  
pp. 95-111
Author(s):  
Falah A. Al-Miamary ◽  
◽  
Omar A. Al-Badrani ◽  
Ali I. Al-Juboury ◽  
◽  
...  
Keyword(s):  
Calcareous Nannofossils ◽  
Northern Iraq ◽  
Oceanic Anoxic Event ◽  
Anoxic Event

scholarly journals Stratigraphic and Microfacies Study of Kometan Formation (Upper Turonian-Lower Campanian), in the Dokan area, Northern Iraq

2021 ◽  
Vol 54 (1F) ◽  
pp. 51-68
Author(s):  
Zaid A. Malak
Keyword(s):  
Sedimentary Environment ◽  
Middle Part ◽  
Outer Shelf ◽  
Calcareous Nannofossils ◽  
Dolomitic Limestone ◽  
Kurdistan Region ◽  
Northern Iraq ◽  
Stratigraphic Ranges ◽  
Unconformable Contact ◽  
Lower Campanian

The Kometan Formation is widely distributed in the northern (Kurdistan region) and central Iraq. The studied area is located near the Dokan Dam, about 58 km., to the Northwest of the Sulaymaniyah city, Northeastern Iraq. The Kometan Formation is exposed on the southwest flank of the Sarah anticline. The formation consists of limestone and dolomitic limestone, which have cherts nodules throughout the formation. The Gulneri Formation is recorded below the Kometan Formation with unconformable contact, while at the top is bounded by the Shiranish Formation unconformably too. Three microfacies are identified, these are lime mudstone, planktic foraminiferal lime wackestone-packstone, keeld planktonic foraminiferal lime wackestone-packstone microfacies. All the sedimentary and fossil evidence refer that the sedimentary environment of the formation is the outer shelf to upper bathyal at the lower and upper parts of formation and its extension to the middle bathyal in the middle part of the formation. Based on the stratigraphic ranges of the recorded Calcareous nannofossils biozones, the age of the Kometan Formation at Dokan area is Late Turonian-Early Campanian.

Hydrogen Cyanide Polymers from the Impact of Comet P/Shoemaker-Levy 9 on Jupiter

1997 ◽  
Vol 161 ◽  
pp. 179-187
Author(s):  
Clifford N. Matthews ◽  
Rose A. Pesce-Rodriguez ◽  
Shirley A. Liebman
Keyword(s):  
Amino Acids ◽  
Solar System ◽  
Hydrogen Cyanide ◽  
Nitrogen Heterocycles ◽  
Laboratory Studies ◽  
Heterogeneous Solids ◽  
The Many ◽  
Comet Halley ◽  
The Impact ◽  
By Products

AbstractHydrogen cyanide polymers – heterogeneous solids ranging in color from yellow to orange to brown to black – may be among the organic macromolecules most readily formed within the Solar System. The non-volatile black crust of comet Halley, for example, as well as the extensive orangebrown streaks in the atmosphere of Jupiter, might consist largely of such polymers synthesized from HCN formed by photolysis of methane and ammonia, the color observed depending on the concentration of HCN involved. Laboratory studies of these ubiquitous compounds point to the presence of polyamidine structures synthesized directly from hydrogen cyanide. These would be converted by water to polypeptides which can be further hydrolyzed to α-amino acids. Black polymers and multimers with conjugated ladder structures derived from HCN could also be formed and might well be the source of the many nitrogen heterocycles, adenine included, observed after pyrolysis. The dark brown color arising from the impacts of comet P/Shoemaker-Levy 9 on Jupiter might therefore be mainly caused by the presence of HCN polymers, whether originally present, deposited by the impactor or synthesized directly from HCN. Spectroscopic detection of these predicted macromolecules and their hydrolytic and pyrolytic by-products would strengthen significantly the hypothesis that cyanide polymerization is a preferred pathway for prebiotic and extraterrestrial chemistry.

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