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The nature and age of basement host rocks and fissure fills in the Lancaster field fractured reservoir, West of Shetland (2019)
Journal Article
Holdsworth, R., Trice, R., Hardman, K., McCaffrey, K., Morton, A., Frei, D., …Rogers, S. (in press). The nature and age of basement host rocks and fissure fills in the Lancaster field fractured reservoir, West of Shetland. Journal of the Geological Society, jgs2019-142. https://doi.org/10.1144/jgs2019-142

Hosting up to 3.3 billion barrels of oil in place, the upfaulted Precambrian 16 crystalline rocks of the Lancaster Field, offshore west of Shetland, give key insights into how 17 fractured hydrocarbon reservoirs can form in such old rocks. The Neoarc... Read More about The nature and age of basement host rocks and fissure fills in the Lancaster field fractured reservoir, West of Shetland.

Natural fracture propping and earthquake-induced oil migration in fractured basement reservoirs (2019)
Journal Article
Holdsworth, R. E., McCaffrey, K. J. W., Dempsey, E., Roberts, N. M. W., Hardman, K., Morton, A., …Robertson, A. (2019). Natural fracture propping and earthquake-induced oil migration in fractured basement reservoirs. Geology, 47(8), 700-704. https://doi.org/10.1130/G46280.1

The geological processes that create fluid storage capacity and connectivity in global fractured basement reservoirs are poorly understood compared to conventional hydrocarbon plays. Hosting potentially multi-billion barrels of oil, the upfaulted P... Read More about Natural fracture propping and earthquake-induced oil migration in fractured basement reservoirs.

The Neoarchaean Uyea Gneiss Complex, Shetland: an onshore fragment of the Rae Craton on the European Plate (2019)
Journal Article
Kinny, P., Strachan, R., Fowler, M., Clark, C., Davis, S., Jahn, I., …Dempsey, E. (2019). The Neoarchaean Uyea Gneiss Complex, Shetland: an onshore fragment of the Rae Craton on the European Plate. Journal of the Geological Society, Article 017. https://doi.org/10.1144/jgs2019-017

A tract of amphibolite facies granitic gneisses and metagabbros in northern Shetland, U.K., is here named the Uyea Gneiss Complex. Zircon U–Pb dating indicates emplacement of the igneous protoliths of the complex c. 2746–2726 Ma, at a later time than... Read More about The Neoarchaean Uyea Gneiss Complex, Shetland: an onshore fragment of the Rae Craton on the European Plate.

Coseismic ultramylonites: An investigation of nanoscale viscous flow and fault weakening during seismic slip (2019)
Journal Article
Pozzi, G., De Paola, N., Holdsworth, R. E., Bowen, L., Nielsen, S. B., & Dempsey, E. D. (2019). Coseismic ultramylonites: An investigation of nanoscale viscous flow and fault weakening during seismic slip. Earth and planetary science letters, 516, 164-175. https://doi.org/10.1016/j.epsl.2019.03.042

Faults weaken during the propagation of earthquakes due to the onset of thermally-activated mechanisms, which vary depending on the rock type. Recent experimental work suggests that carbonate-hosted faults are lubricated by viscous flow in nano-granu... Read More about Coseismic ultramylonites: An investigation of nanoscale viscous flow and fault weakening during seismic slip.