Architecture and stacking patterns of deep-marine lobe and related deposits, Eocene Hecho Group, Jaca basin, Spanish Pyrenees: Depositional processes, sandbody geometry and stacking patterns

Theme: Past Life & Environments

Main Supervisor:

Kevin Pickering

Earth Sciences, UCL

Second Supervisor:

Paul Bown

Earth Sciences, UCL

Project Description:

Deep-marine sandy lobe and related deposits form an important part of modern and ancient submarine fans and can form major hydrocarbon reservoirs. A wide range of field/laboratory techniques will be used to understand the 3-D architecture and building processes/patterns of lobe deposits in world-class outcrops in the Middle Eocene Ainsa-Jaca basin, Spanish Pyrenees (50-40 Ma).

Pickering and students have studied the proximal Ainsa basin, providing a geological framework for research in the adjoining, more distal, Jaca basin. Correlations of individual beds will be made (including so-called “hybrid-event beds” or “linked debrite-turbidite beds”) and packages of beds (lobe and related environments), using petrographic, geochemical and biostratigraphic studies of calcareous nannofossils.

Time-series analysis of bed thickness data will be used to investigate any global climate signals in controlling deposition (at Milankovitch frequencies, as demonstrated for the fine-grained sedimentation ion the Ainsa basin).

Policy Impact of Research:

This research will help in the exploration and successful production of hydrocarbon reserves in sedimentary rocks requires via a detailed understanding of the nature and geometry of both the reservoir (e.g. high porosity, high-permeability sand) and the seals (low-porosity, low-permeability).

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