What is the geological history of the Sif Fatima oil field basin in Berkine-South Algeria?5 answersThe Sif Fatima oil field basin in Berkine-South Algeria has a complex geological history. The basin contains over 7000 meters of Palaeozoic and Mesozoic sedimentary rocks, with two first-order depositional supercycles: Gondwana and Tethys. These supercycles record extensional basin formation, followed by periods of overall net subsidence and basin inversion. The basin is dominated by recurrently reactivated transpressional and transtensional features controlled by the basement structural grain. The petroleum systems in the basin are associated with Early Silurian and Late Devonian world-class source rocks and numerous Palaeozoic and Triassic reservoirs. The Late Triassic - Early Jurassic evaporites in the basin are described as predominantly non-marine halites deposited in low-lying salinas with a barrier to the north. The basin also experienced Late Triassic sealevel rise, warm climatic conditions, and on-going extensional tectonics. The basin modeling study suggests a Cretaceous-Tertiary petroleum generation and emplacement for the source rocks, with Triassic reservoirs being important for hydrocarbon migration and trapping.
What are the primary causes of land use/land cover change in Ethiopian basins?5 answersThe primary causes of land use/land cover change in Ethiopian basins are population growth, agricultural activities, deforestation, fuelwood extraction, and climate variability. These factors have led to the expansion of agricultural land, conversion of forest and woodlands to other land cover types, and increased demand for fuelwood and construction materials. Rapid population growth has put pressure on land resources, leading to the need for more cultivated land, grazing land, and settlement areas. Anthropogenic activities, such as agricultural practices and charcoal production, have also contributed to land use/land cover change in the basins. Additionally, climate variability and persistent drought have played a role in altering land cover in the study area. These findings highlight the importance of considering these driving factors in land use policy and management strategies to ensure sustainable land management in Ethiopian basins.
What is depositional environment of Tarutao Group?3 answersThe depositional environment of the Tarutao Group is not mentioned in the provided abstracts.
What is the geology of khenifra azrou Basin in Morocco?5 answersThe Khenifra-Azrou Basin in Morocco is characterized by a complex geology consisting of volcanic and volcanoclastic rocks. The basin contains two distinct magmatic sequences: the Dhar Lahmar Sequence, which consists of Upper Visean basaltic lava flows and pyroclastic deposits, and the Kef Al Asri Sequence, which consists of Visean-Serpukhovian intermediate to acid rocks. These sequences show a continuous spatial and temporal evolution, indicating a cogenetic magmatic differentiation process controlled by crystal fractionation and minor crustal assimilation. The volcanic rocks in the basin display petrographic and geochemical characteristics similar to those found in the Eastern Meseta, suggesting a similar geodynamic environment and collisional geodynamic settings for both regions. The basin also contains reefs formed by the interactions of microbes and coral communities, which provide insights into the basin's environmental and tectonic evolution. The presence of early Visean coral assemblages suggests that the basin experienced transgression during this period. Overall, the geology of the Khenifra-Azrou Basin reflects a complex tectonic history and provides valuable information about the Carboniferous events that shaped the region.
What is the geology of the Fourhal Basin in Morocco?5 answersThe Fourhal Basin in Morocco is a late-orogenic, fault-bounded basin that formed during the Variscan orogeny. It contains reddish-brown alluvial-fan and fluvial conglomerates and sandstones, as well as mudstone of floodplain origin. The basin experienced structural deformation and erosion due to syndepositional and postdepositional tectonism. The sedimentology, biostratigraphy, and sequence stratigraphy of the Early Carboniferous turbiditic basins in the Moroccan Meseta provide insights into the geology of the Fourhal Basin. The Fourhal Basin is one of the four marine basins in the Moroccan Meseta during this period, and it is connected to Palaeo-Tethys and western Europe based on paleobiogeographical affinities.
What is the Quaternary tectonic characterics of Qaidam Basin?5 answersThe Quaternary tectonic characteristics of the Qaidam Basin are episodic, transformable, and inconsistent, reflecting the uplift of the Qinghai-Tibet Plateau. The structural activities in the basin can be divided into three phases: shifting from south to north, west to east, and from the margin to the hinterland. The intensity of early activity was greater than that of the early basin. The western Qaidam Basin experienced NE-SW compressional strain, parallel to upper crust movements revealed by GPS, indicating dominant NE-SW compressional strain in the late Cenozoic. The changing hydrological pattern in the basin-bounding ranges played a significant role in controlling the Quaternary landscape evolution of the Qaidam Basin. The Sanhu area of the Qaidam Basin has continuous hydrocarbon generation and dynamic accumulation, with huge resource potential and exploration value. The eastern Qaidam Basin was formed as a result of crustal folding related to strong horizontal compression, and it is a crustal-scale synclinal basin.