This study evaluates the unconventional reservoir geomechanical characteristics of Lower Turonian Abu Roash-F (AR-F) carbonates from Gharadig field, onshore Egypt, which has not been attempted before. The interval dominantly consists planktic foraminifera and micrite matrix. AR-F marine carbonate is organic-rich (0.59–3.57 wt% total organic carbon), thermally mature (435–441°C T max ) falls wit...

Abstract. Marine fronts delineate the boundary between distinct water masses and, through advection of nutrients, are important facilitators regional productivity and biodiversity. As modern climate continues to change, migration frontal zones is evident, but a lack information about their status prior instrumental records hinders future projections. Here, we combine data from lipid biomarkers ...

The iodine to calcium ratio in carbonate (I/Ca) has been widely used indicate ocean oxygenation level the past. Given volatility of iodine, I/Ca measured alkaline solutions previous studies. However, this limits application with other element/Ca (El/Ca) proxies at same time and foraminifera because El/Ca data are preferably analyzed acidic solutions. This study assesses reliability measurements...

Abstract. Constraints on the evolution of atmospheric CO2 levels throughout Earth's history are foundational to our understanding past variations in climate. Despite considerable effort, records vary their temporal and spatial coverage estimates do not always converge, therefore new proxies valuable. Here we reconstruct values across major climate transitions over 16 million years using boron i...

Oxygen isotope data for a Pliocene interval from 3.6 to 2.8 million years ago show a mean increase (0.5 per mil) of benthic 6180 at about 3.2 million years ago, whereas planktic 6180 does not increase. This lack of covariance indicates that the event at 3.2 million years did not result in a permanent increase in the ice budget of either the Northern or the Southern Hemisphere. The history of co...

Major negative oxygen isotopic anomalies in planktonic foraminifera are associated with deep-sea anoxic mud layers (sapropels) deposited 9000 and 80,000 years ago in the eastern Mediterranean. The isotopic depletion in surface-dwelling foraminifera is significantly greater than in mesopelagic foraminifera. This difference in isotopic response suggests that surface-water salinities were drastica...

This paper focuses on modelling and visualisation of mineral shells of foraminifera (unicellular aquatic, mainly marine, organisms). Our recent model follows the moving reference approach of theoretical modelling of foraminiferal shells. This model introduces three important aspects of simulations, i.e. non-circular chamber shapes (in 2D), allometry of chambers and three dimensional simulation ...

Abstract. The application of stable oxygen isotopic ratio surface-dwelling planktic foraminifera Globigerinoides ruber (white variety; ?18Oruber) to reconstruct past hydrological changes requires a precise understanding the effect ambient parameters on ?18Oruber. northern Indian Ocean, with its huge freshwater influx and being part Indo-Pacific Warm Pool, provides unique setting understand both...

Extensive CO2 vents have been discovered in the Wagner Basin, northern Gulf of California, where they create large areas with lowered seawater pH. Such areas are suitable for investigations of long-term biological effects of ocean acidification and effects of CO2 leakage from subsea carbon capture storage. Here, we show responses of benthic foraminifera to seawater pH gradients at 74-207m water...