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Academic literature on the topic 'Palynofacies'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 June 2025

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Journal articles on the topic "Palynofacies"

1

Cyrille, Yao Kouadio, Kouassi Kouamé Alfred, Bie Goha René, Digbehi Zéli Bruno, and Gbangbot Jean Michel Kouadio. "Caractérisation Palynologique et Palynofaciologique de la Marge Est (Marge d’Abidjan) du Bassin Sédimentaire de Côte d’Ivoire." European Scientific Journal, ESJ 18, no. 33 (2022): 144. http://dx.doi.org/10.19044/esj.2022.v18n33p144.

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Des dépôts offshores localisés à l’Est de la marge d’Abidjan (Côte d’Ivoire) ont fait l’objet d’analyse palynologique et palynofaciologique. Elle a porté sur des déblais de forage à partir desquels trente-deux (32) paires de lames minces palynologiques ont été confectionnées. L’objectif était de mettre en évidence les étages du Tertiaire et la limite K-Pg par les palynomorphes stratigraphiques et de déterminer les environnements de dépôt à travers le palynofaciès. Cinq étages ont ainsi été mis en évidence. Ce sont le Maastrichtien supérieur, le Paléocène inferieur, le Paléocène supérieur, l’Eocène inférieur et l’Eocène moyen sur la base des palynomorphes tels que Cerodinium granulostriatum, Andalusiella mauthei, Andalusiella rhomboïdes, Andalusiella polymorpha, Andalusiella gabonensis, Retitricolporites irregularis, Psilatricolporites sp., Laevigatosporites ovatus, Retistephanocolpites williamsii, Apectodinium homomorphum, Adnatosphaeridium multispinosum etc. Trois (3) types de palynofaciès dont le palynofaciès 1 à phytoclastes dominants dans laquelle les spores et les grains de pollen dominent évoquant un environnement littoral au Maastrichtien et au Paléocène, un palynofaciès 2 à phytoclastes et matière organique amorphe dominant à l’Eocène déposé dans un milieu marin marginal et un palynofaciès 3 à matière organique amorphe dominant au paléocène supérieur et à l’Eocène indiquant un milieu de plateau continental interne à externe.
 
 Offshore deposits located to the East of the Abidjan margin (Côte d’Ivoire) have been the subject of palynological and palynofaciological analysis. It focused on drill cuttings from which thirty-two (32) pairs of palynological thin sections were made. The objective was to highlight the Tertiary stages and the K-Pg boundary by stratigraphic palynomorphs and to determine the deposition environments by palynofacies. Five stages were thus highlighted. These are the Upper Maastrichtian, the Lower Paleocene, the Upper Paleocene, the Lower Eocene, and the Middle Eocene based on palynomorphs such as Cerodinium granulostriatum, Andalusiella mauthei, Andalusiella rhomboïdes, Andalusiella polymorpha, Andalusiella gabonensis, Retitricolporites irregularis, Psilatricolporites sp.,Laevigatosporites ovatus, Retistephanocolpites williamsii, Apectodinium homomorphum, Adnatosphaeridium multispinosum etc. Three (3) types of palynofacies including palynofacies 1 with dominant phytoclasts in which spores and pollen grains dominate, evoking a coastal environment in the Maastrichtian and Paleocene, a palynofacies 2 with phytoclasts and amorphous organic matter dominant in the Eocene deposited in a marginal marine environment and an amorphous organic dominant palynofacies 3 in the Upper Paleocene and Eocene indicating an inner to outer continental shelf environment.
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2

Mamaseni, Wrya J., Srood F. Naqshabandi, and Falah Kh Al-Jaboury. "PALYNOFACIES AND PALEOENVIRONMENT OF LATE JURASSIC-EARLY CRETACEOUS FORMATIONS AT DUHOK BASIN, NORTHERN IRAQ." Iraqi Geological Journal 52, no. 1 (2019): 61–82. http://dx.doi.org/10.46717/igj.52.1.5ms-2019-06-27.

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This study was covered palynofacies and paleodepositional environment of the Chai Gara, Garagu, Sarmord and Qamchuqa formations along Atrush, Shaikhan and Sarsang oilfields in Duhok Region northern Iraq. Six main types of palynofacies were recognized within the studied formations. The palynofacies one (PF.1) and two (PF.2) are appeared in Chia Gara Formation, these two types of palynofacies are characterized by dominant amorphous organic matters (AOM), especially in PF.2 which reaches to 90%, moderate palynomorphs content ranges between 5 – 59%, whereas the phytoclasts are relatively low percentages (1 – 5%). The identified palynofacies indicate that the paleodepositional environment of the Chia Gara Formation is distal suboxic-anoxic basin (IX) to dysoxic-anoxic shelf (VII). Garagu Formation is represented by palynofacies three (PF.3) and palynofacies four (PF.4), the former one is characterized by the abundant of palynomorph, ranges between 41 – 85% (comprised mainly of pollen, spores, foraminifera test lining and few dinoflagellates), while the latter one is rich by amorphous organic matter which is between 55 – 63%, in both palynofacies the percentage of phytoclast is low to moderate ranges change from 7 – 19, and 3-35% respectively. Paleodepotional environment of the Garagu Formation is oxic shelf (V, VIII). The Sarmord Formation is represented by palynofacies five (PF.5), this palynofacies is characterized by high percentage of phytoclasts which reaches to 74%, with moderate palynomorphs and amorphous organic matter ranges between 11 – 31%, 12 – 38% respectively. Shelf to basin transition (IV) is the claimed environment for the Sarmord Formation. Qamchuqa Formation is represented by palynofacies six (PF.6), this facies is also high percentage of phytoclasts content but more than PF.5, which the range is 48 – 85% with a moderate percentage of palynomorphs (12 – 43%) and a low percentage of amorphous organic matter (3 – 15%). The Qamchuqa Formation was deposited under proximal oxic shelf (III) condition.
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3

Chiaghanam, Osita Igwebuike, Okechukwu Nicodemus Ikegwuonu, Chikodi Jennifer Ekwegbalu, Emmanuel Ude Aniwetalu, and Kingsley Chukwuebuka Chiadikobi. "Optical (visual) Kerogen assessment of Enugu Shale, Anambra Basin, Southeastern Nigeria: Implications for source rock potential and thermal maturation." Global Journal of Geological Sciences 19, no. 1 (2021): 123–32. http://dx.doi.org/10.4314/gjgs.v19i1.10.

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Palynological analysis was carried out on Ten (10) samples from outcrops of the Campanian Enugu Formation, a component lithostratigraphic unit of the Anambra Basin, using the acid maceration techniques for recovering acidinsoluble organic-walled microfossils. Two main lithological units were encountered, which include: carbonaceous shale and siltstone. Result from kerogen laboratory examination reveals two (2) main groups of palynofacies association namely; palynofacies (A and B), based on the change in particulate organic matter constituents of organic residue extract. Palynofacies A is characterized by abundant opaques debris with common terrestrial phytoclasts, which occupy the southwestern and northwestern parts of the studied area, whereas palynofacies B dominates in the northeastern part, characterised by abundant phytoclasts followed by frequent opaques debris. Kerogen type III with gas-prone material is suggested for both palynofacies. The examined exine of spore/ pollen grain are pale yellow – yellow, with Thermal Alteration Index TAI of 1+ to 2- and Vitrinite Reflectane (R o) (0.3 % - 0.4 %) in palynofacies A, and yellow – yellow brown, with Thermal Alteration Index TAI of 2- to 2, and Vitrinite Reflectane (R o) of 0.3% - 0.5% in palynofacies B. These revealed source rock that is thermally immature to slightly mature but has potential to generate mainly gas. The kerogen data generated using transmitted light microscopy correlated well with geochemical data obtained using rock-eval pyrolysis method, and this shows the method a reliable tool for assessing petroleum potential in any given sedimentary basins.
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4

Aswad, M. K., S. F. Naqshabandi, and M. F. Omer. "Palynofacies analysis and depositional environment of the upper Triassic Kurra Chine Formation: integrated by samples from sarta and Tawke oil fields and outcrop samples from sirwan valley in the kurdistan region, northern Iraq." IOP Conference Series: Earth and Environmental Science 1300, no. 1 (2024): 012033. http://dx.doi.org/10.1088/1755-1315/1300/1/012033.

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Abstract Palynofacies (PF) analysis was conducted on 34 crushed samples of the Upper Triassic Kurra Chine Formation. These samples were collected from one outcrop sample and two production wells in northern Iraq. A 10μm nylon mesh sieve was used for the concentration of palynomorphs. Four palynofacies types were found in this study. PF1 was characterized primarily by amorphous organic matter (AOM), suggesting a distal suboxic-anoxic depositional environment. PF2 comprised of AOM, along with some Phytoclasts and palynomorphs, indicating a distal dysoxic-oxic shelf depositional environment. PF3 displayed an increasing volume of palynomorphs, signifying a distal dysoxic-anoxic shelf depositional environment. PF4 predominantly consisted of palynomorphs and Phytoclasts, representing a mud-dominated oxic shelf (distal shelf) depositional environment. Kerogen types were identified as type II, which is oil-prone in three palynofacies, and type III which is gas-prone in one palynofacies.
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5

Pineda, Juan A., Marcos Comerio, Eduardo G. Ottone, Joaquín Salduondo, Gastón Otegui, and Georgina Erra. "PALYNOFACIES AND ORGANIC GEOCHEMISTRY OF LACUSTRINE SOURCE ROCKS: THE POTRERILLOS – CACHEUTA SOURCE ROCK SYSTEM IN THE TRIASSIC CUYO BASIN, WEST‐CENTRAL ARGENTINA." Journal of Petroleum Geology 47, no. 1 (2023): 75–99. http://dx.doi.org/10.1111/jpg.12851.

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This study presents an integrated investigation of the Upper Triassic Potrerillos – Cacheuta lacustrine source rock in the Cuyo Basin of western Argentina. Data came from palynofacies analyses, organic petrography, Rock‐Eval pyrolysis and mineralogical studies based on X‐ray diffraction analyses. An 80 m thick outcrop section was studied and is interpreted to represent the transition from shallow‐lacustrine sediments influenced by fluvial discharges (uppermost Potrerillos Formation) to the deposits of a deep, permanent lake (Cacheuta Formation). Three palynofacies were defined. Palynofacies I is characterized by shallowing‐upward cycles with abundant woody material, and was deposited under an oxic, disturbed water column. Palynofacies II and III occur in laminated shales rich in amorphous organic matter (AOM) and freshwater algal material (Botryococcus) respectively, which were deposited under oxygen‐depleted conditions. In general, the detrital material present suggests an input derived from fluvial discharges; however, interbedded tuffs altered to analcime and smectite suggest the transformation of vitric material in pyroclastic ash under saline to alkaline water conditions. Kerogen Types II/III and III with high total organic carbon values indicate a moderate oil‐ and gas‐prone source rock whose thermal maturity varies from immature to the early oil window (Tmax: 430‐438 °C; vitrinite reflectance: 0.59‐0.67 % VRo; and thermal alteration index: 2‐2+).This study demonstrates the importance of palynofacies analyses for the interpretation of depositional changes and associated controls in lacustrine shale successions. When integrated with data from organic geochemistry, palynofacies analysis is an important tool in the evaluation of a source rock's thermal maturity and hydrocarbon generation potential.
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6

Shushan, Ismail Elforjani. "Palynofacies Analysis of Selected Organic-rich Shales from Libyan Sahara: Implication to Palaeoenvironment and Hydrocarbon Source Rock Potential." مجلة علوم البحار والتقنيات البيئية 7, no. 2 (2021): 54–76. http://dx.doi.org/10.59743/jmset.v7i2.19.

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Palynofacies analysis was carried out on three (3) packages of shale-cutting samples derived from a well drilled within Gadames Basin. These included: the upper package (Carboniferous at 5,530 ft), the middle package (Carboniferous/Devonian at 5,600 ft and 5,780 ft), and the lower package (Devonian at 6,700 ft). Two palynofacies were identified: "P-1", involving the upper and middle packages (Carboniferous/Devonian), and "P-2", involving the lower package (Devonian). P-1 and P-2 were considered to form one "palynofacies association" located at a mud-dominated oxic shelf (distal shelf) and are analogous to other palynofacies from other countries that are characterized by the dominance of terrestrial upon marine palynomorphs and moderate to low phytoclasts and AOM respectively that typically deposited within a shoreline zone (probably fluvial-deltaic source or marginal marine environment). Spore color index "SCI" evaluation for source rock and thermal maturation, in turn, indicates early mature oil/gas prone (kerogen type II>III) to post mature kerogen type III>IV "gas prone" for the studied cutting sample packages.
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7

Pavlishina, Polina. "Palynofacies analysis – principles and application for paleoenvironmental studies: implications from Bulgaria." Review of the Bulgarian Geological Society 82, no. 2 (2021): 27–32. http://dx.doi.org/10.52215/rev.bgs.2020.82.2.3.

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The use of palynofacies analysis has been steadily increasing during the last decades. This stems from both commercial interests (i.e., hydrocarbon exploration) and academic research of past environments and studies of the global climate changes that took place during the Phanerozoic. In both commercial and academic contexts, there is a need for a better understanding of palaeoenvironmental changes in order to correctly date and interpret the depositional facies recorded in boreholes and outcrops. The present paper introduces this important analysis in the Bulgarian literature with characteristic examples of different palynofacies types documented by the author in Cretaceous sections in Bulgaria and their interpretation. These examples highlight the value of using palynofacies and palynomorph associations in an integrated approach for paleoenvironmental reconstructions in Bulgaria.
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8

Pavlishina, Polina. "Palynofacies analysis – principles and application for paleoenvironmental studies: implications from Bulgaria." Review of the Bulgarian Geological Society 82, no. 2 (2021): 27–32. http://dx.doi.org/10.52215/rev.bgs.2021.82.2.3.

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Abstract:
The use of palynofacies analysis has been steadily increasing during the last decades. This stems from both commercial interests (i.e., hydrocarbon exploration) and academic research of past environments and studies of the global climate changes that took place during the Phanerozoic. In both commercial and academic contexts, there is a need for a better understanding of palaeoenvironmental changes in order to correctly date and interpret the depositional facies recorded in boreholes and outcrops. The present paper introduces this important analysis in the Bulgarian literature with characteristic examples of different palynofacies types documented by the author in Cretaceous sections in Bulgaria and their interpretation. These examples highlight the value of using palynofacies and palynomorph associations in an integrated approach for paleoenvironmental reconstructions in Bulgaria.
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9

Atta-Peters, D., C. I. Agama, D. K. Asiedu, and E. Apesegah. "Palynology, Palynofacies and Palaeoenvironments of Sedimentary Organic Matter from Bonyere - 1 Well, Tano Basin, Western Ghana." International Letters of Natural Sciences 5 (November 2013): 27–45. http://dx.doi.org/10.18052/www.scipress.com/ilns.5.27.

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Palynofacies analyses from Bonyere Well No. 1 in the Tano basin, western Ghana has revealed five palynofacies associations (I – V) based on the percentage relative abundances of the sedimentary organic matter (SOM). The palynofacies associations reflect deposition in a fluvio-deltaic (oxic) environment, a distal dysoxic-anoxic shelf environment, a proximal dysoxic-suboxic environment, nearshore (oxic) and a fluvio-deltaic/nearshore environment with high oxygen levels and low preservation rates respectively. Based on marker palynomorphs, Campanian – Maastrichtian age has been assigned to sediments within the interval (1800-10 ft) – (90-100 ft), Turonian – Lower Senonian (Santonian) age between (3160-70 ft) – (1980-90 ft) and Aptian age between the interval (8140-50 ft) – (3340-50 ft). The absence of the elater-bearing pollen which are typical Africa-South America (ASA) elements for the Albian – Cenomanian age is indicative of an unconformity between the Aptian and Turonian sediments.
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10

Atta-Peters, D., C. I. Agama, D. K. Asiedu, and E. Apesegah. "Palynology, Palynofacies and Palaeoenvironments of Sedimentary Organic Matter from Bonyere - 1 Well, Tano Basin, Western Ghana." International Letters of Natural Sciences 5 (November 16, 2013): 27–45. http://dx.doi.org/10.56431/p-i2vlvk.

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Palynofacies analyses from Bonyere Well No. 1 in the Tano basin, western Ghana has revealed five palynofacies associations (I – V) based on the percentage relative abundances of the sedimentary organic matter (SOM). The palynofacies associations reflect deposition in a fluvio-deltaic (oxic) environment, a distal dysoxic-anoxic shelf environment, a proximal dysoxic-suboxic environment, nearshore (oxic) and a fluvio-deltaic/nearshore environment with high oxygen levels and low preservation rates respectively. Based on marker palynomorphs, Campanian – Maastrichtian age has been assigned to sediments within the interval (1800-10 ft) – (90-100 ft), Turonian – Lower Senonian (Santonian) age between (3160-70 ft) – (1980-90 ft) and Aptian age between the interval (8140-50 ft) – (3340-50 ft). The absence of the elater-bearing pollen which are typical Africa-South America (ASA) elements for the Albian – Cenomanian age is indicative of an unconformity between the Aptian and Turonian sediments.
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