Dougal Jerram is an award winning Earth Scientist, with over 15 years post PhD experience, offering earth science consultancy in a broad range of areas.
He has authored books, over 50 peer reviewed papers, edited on key subjects, and has done fieldwork in an array of locations around the world. With specialisation in volcanics, rifted basins, field/regional geology and petrology, DougalEARTH offers a range of skills to help with exploration and development in some of the most challenging of areas. DougalEARTH can provide; field workshops, proprietary and multi-client reports, training in volcanics, experienced field assistance, QC on volcanics issues, and geoscience consultancy via remote or in-house postings.
Dougal has undertaken consultancy work in almost all the volcanic margins around the World…
Having worked in almost all of the volcanic margins around the world, DougalEARTH brings experience from a variety of locations including: North Atlantic, South Atlantic (Parana-Etendeka/Karoo), Antarctica, India, Ethiopia, Siberia, China, USA/Canada and Australia. Additionally Dougal has published extensively leading the way with our understanding of volcanic facies in rifted margins and flood basalt provinces.
Key to understanding these provinces is looking at the volcanic fill, and associated intrusions, along with the sedimentary fill. Using this approach the temporal and spatial influence of the igneous rocks in the sedimentary basin can be fully realised and incorporated into facies architecture, case studies and 3D models.
North Atlantic Igneous Province
South Atlantic Margin; Namibia, Brazil
Others; e.g. Columbia River, SE Asia, China
Some key publications:
J. Hansen, D.A. Jerram, K. McCaffrey, and S.R. Passey. Early Cenozoic saucer-shaped sills of the Faroe Islands: an example of intrusive styles in basaltic lava piles. Journal of the Geological Society; January 2011; v. 168; no. 1; p. 159-178; DOI: 10.1144/0016-76492010-012.
Dougal A. Jerram, Richard T. Single, Richard W. Hobbs & Catherine E. Nelson 2009.Understanding the offshore flood basalt sequence using onshore volcanic facies analogues: an example from the Faroe–Shetland basin Geol. Mag. 146 (3), pp. 353–367. doi:10.1017/S0016756809005974
Catherine E. Nelson, Dougal A. Jerram, Richard W. Hobbs, Ricky Terrington, and Holger Kessler. Reconstructing flood basalt lava flows in three dimensions using terrestrial laser scanning. Geosphere, Feb 2011; 7: 87 – 96.
Nelson, C.E., Jerram, D.A., and Hobbs, R.W., 2009, Flood basalt facies from borehole data: implications for prospectivity and volcanology in volcanic rifted margins: Petroleum Geoscience, v. 15, p. 313-324.
Dougal A. Jerram, & Mike Widdowson 2005, The anatomy of Continental Flood Basalt Provinces: Geological constraints on the processes and products of flood volcanism. Lithos 79, 385-405.
Training and group exercises in the field provide one of the best methods to tackle key exploration issues, broaden links between working groups, and provide valuable off-site time for your team. Dougal Jerram has run field trips for both industry and academia since 1997, and recently co-authored the book ‘Field Guide to Igneous Rocks’ by Wiley.(see book section)
Additionally lab based lecture/practical classes can be used to provide ‘in-house’ training, and core workshops on key sub-surface stratigraphic examples. DougalEARTH aims to provide the best possible training through years of expertise and by teaming up with key expert colleagues to make sure that the training experience is the best possible combination of ‘state of the art’ knowledge transfer, and team experience.
Textural analysis and petrography have been at the heart of my research since PhD times. New techniques to quantify textures in 2D and 3D have revolutionised the way in which we do petrographic analysis of rocks. Grains and crystals are the building blocks of the rocks that make up the earth and are key to our fundamental understanding of key rock properties in sedimentary, igneous and metamorphic rocks.
Grain size and Crystal Size Distributions
2D & 3D textural analysis of rocks
Some key publications:
Clayton Grove & Dougal A. Jerram. jPOR: An ImageJ macro to quantify total optical porosity from blue-stained thin sections. Computers & Geosciences, Volume 37, Issue 11, November 2011, Pages 1850-1859. doi:10.1016/j.cageo.2011.03.002
Dougal A. Jerram, Graham R. Davis, Alex Mock, Amanda Charrier, and Bruce D. Marsh. Quantifying 3D crystal populations, packing and layering in shallow intrusions: A case study from the Basement Sill, Dry Valleys, Antarctica. Geosphere, Oct 2010; 6: 537 – 548.
Victoria M. Martin, Jon Davidson, Dan Morgan, and Dougal A. Jerram 2010. Using the Sr isotope compositions of feldspars and glass to distinguish magma system components and dynamics. Geology 2010;38;539-542. doi: 10.1130/G30758.1
Dougal A. Jerram , Alex Mock , Graham R. Davis, Matthew Field, Richard J. Brown 2009. 3D crystal size distributions: A case study on quantifying olivine populations in kimberlites. Lithos 112S, 223–235.
Dougal A. Jerram, & Micheal Higgins. 2007. 3D Analysis of Rock Textures: Quantifying Igneous Microstructures. ELEMENTS 3: 239–245.