19 May, 2022 Lisbon Lisboa Portugal

Mixed/Hybrid Systems (Turbidite, MTDs and Contourites) on Continental Margins

F. Javier Hernández-Molina, Karyna Rodriguez & Neil Hodgson

18-19 May 2022
Lisbon, Portugal

Sediment gravity flows and along-slope bottom currents (contourites) are the two main deep-water sedimentary processes shaping the continental margins and controlling the stacking patterns of their sedimentary successions. Depending on which one of these processes dominates, either a pure mass transport deposit (MTD), turbiditic or contourite depositional systems develop. But, when these processes interact each other, a hybrid or mixed depositional systems are generated. These hybrid systems are characterized by a wide spectrum dominated by either along- or down-slope processes forming morphological features and deposits which deviate away from end-member models. These hybrid systems have only just been recently identified but due to their economic importance proven by recent significant discoveries (Coral and Mamba Fields, Mozambique and Jubilee Field, Ghana) they have begun to be studied in more detail.

Examples of hybrid / mixed depositional systems have been described in the offshore of Mozambique, Uruguay, Brazil, Argentina and Antarctica. In spite of these examples and their importance, there is a lack of knowledge about these systems themselves and the nature of processes interaction at the base of their origin. Similarly, the role of bottom-currents in the redistribution and reworking of deep-water sediments forming contourite systems, has been clearly underestimated. The diagnostic criteria to identify them at the facies and seismic scales in relation to sediment gravity flows deposits is still missing and the paleoceanographic implications are unknown. The interaction of processes promotes the deposition of clean sandstone deposits as a result of vigorous bottom currents, or due to the reworking of overspill sediments in both canyons/channels and inter-channel areas, which have renewed interest and attention from both academia and the exploration industry which should result in providing insights into a great future exploration opportunity.


This 2-day conference aims to bring together diverse experts working on modern and ancient turbidite, MTDs, contourite and hybrid/mixed systems in order to improve the present-day knowledge, models and predictive power. Sessions will include the following themes:

  • Mass transport processes & deposits
  • Turbidite processes & deposits
  • Bottom current processes & deposits (including bottom-current reworked sands, BCRS)
  • Hybrid / mixed depositional systems
  • Synchronous vs asynchronous interactions
  • Numerical models & tank experiments
  • Ichnological analysis of turbidite, MTDs, contourite and hybrid / mixed deposits
  • Data integration & multidisciplinary analysis
  • Implications on hydrocarbon exploration
Invited talks
  • Gravitational processes and deposits, Ben Kneller (Univ. Aberdeen, UK)
  • Bottom current processes and deposits and their conceptual and economic implications, Adriano Viana (Petrobras, Brazil)
  • Mixed systems, Nicole J. Bayliss / Juan Fedele (ExxonMobil, Houston, USA)
  • A new classification system for mixed (turbidite-contourite) depositional systems: examples, conceptual models and diagnostic criteria for modern and ancient records, Sara Rodrigues (RHUL, UK)
  • Implication of Mixed system on HC exploration, Marco Fonnesu (ENI, Italy)
  • Ichnological analysis: a tool for characterizing deep-marine sedimentary systems, Francisco J. Rodriguez-Tovar (Univ. Granada, Spain)


AAPG Event Lisbon Açores Portugal 16 May, 2022 Sedimentology and Stratigraphy, Clastics, Deepwater Turbidites 25 May, 2021 25 May, 2021 8:00 AM 5:00 PM 06 February, 2020
Lisbon, Portugal
16-17 May 2022

Come along on this 2-day field seminar and tour outcrops in the Serra de Montejunto, just north of Lisbon and on the coast from Porto Novo to Paimogo.

Ricardo Pereira, (PARTEX Oil and Gas & Instituto Dom Luiz)
Gil Machado (ChronSurveys Lda & Instituto Dom Luiz)
To be determined
Ground Transporation
Snacks and Refreshments
Lunch and Dinner
Departure Time/Location
16 May 2020 8:30am
SANA Metropolitan Hotel

Note:Transportation to start point is not included in the costs of this trip. Please bring clothing for hot day time temperatures (sun hat/ sun glasses/ sun cream etc.). Participants must wear suitable and comfortable light trekking shoes.


To gain or increase an understanding of the tectono-sedimentary processes of continental extension and rifting supported by outcrop observations, with focus on deep-depositional marine systems. Discuss implications for prospective petroleum systems. Promote debate and nourish new insights between attendants.

About the Field Trip

The Lusitanian Basin records the proximal events of syn- to post rift evolution of the hyper-extended West Iberian Margin, showing some outstanding examples of the combined tectono-stratigraphic depositional systems. Here, the Late Jurassic reveals diverse aspects of mixed marine depositional systems including not only submarine fans and turbidites, but also the build-up of carbonate reefs and shoreface to fluvial clastic sequences. Throughout the fieldtrip the different depositional aspects can be observed in detail to demonstrate how such depositional systems can vary in time and space. Observation of these outcrops allows a better understanding on how deep-water depositional systems can change within a sub-basin and help improving the understanding of reservoir properties.

Day 1 (16th May 2022)
Stop # Location Relevant Aspects
1 Vila Franca de Xira Intro-Overview
2 Castanheira Coarse grain proximal depositional systems; Fault slope deposits
3 Arruda Marine shales and interbedded clastic deposits
4 Ota Late Jurassic marine reefs
5 Montejunto-Vila Verde Marine shales and interbedded clastic deposits
6 Wrap-up at the Hotel  
Day 2 (17th May 2022)
1 Consolação-São Bernardino Shaly marine deposits of the Abadia Fm. (Kimm.)
2 Paimogo Shoreface to fluvial deposits Late Jurassic
3 Porto Novo Shoreface to fluvial deposits Late Jurassic
4 Santa Cruz Late Jurassic turbidites
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AAPG Event Lisbon Lisboa Portugal 20 May, 2022 9:30 AM 10:30 AM 22 September, 2021
Lisbon, Portugal
20 May 2022

Geotour the Alfama (Old Town) of Lisbon with Gil Machado and explore the link between the history of Lisbon and its geology.

Geotour Leader:
Gil Machado
Departure Time/Location:
20 May 2020 9:30am
SANA Metropolitan Hotel

Note: Comfortable walking shoes, water, sunglasses and hat are recommended

St. Luzia Belvedere
Roman/Moorish Wall - We will be seeing several preserved stretches of the wall and how it was incorporated into the city growth
St. George Castle – We will visit the outer part.
Lisbon Cathedral - We will be seeing the architectural aspects of the church, the building stones and, if open to the public, archaeological finds of the old mosque that stood in the same place.
St. Anthony Church
Roman Theatre - We will have a glimpse of Roman Lisbon with the view over the theatre and we will discuss the building stones used (which derived from many parts of the empire).
Chafariz de Dentro - We will see several historical fountains, old thermal baths and explore the hydrogeology of Lisbon and how water supply affected the development of the city.
Old Ship Harbour - Preserved in modern downtown.
Lunch at a restaurant with historical interest (TBC)
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SANA Metropolitan Hotel, Lisbon
R. Soeiro Pereira Gomes 2
Lisbon 1600-198
+351 21 798 2500
Lisbon, Portugal - SANA Metropolitan Hotel Lisbon, Portugal - SANA Metropolitan Hotel New Date 56182 SANA Metropolitan Hotel, Lisbon

Details coming soon


F Javier Hernandez-Molina F Javier Hernandez-Molina Co-Chair Royal Holloway University of London, UK
Neil Hodgson Neil Hodgson Co-Chair VP Geoscience, Searcher Seismic, UK
Karyna Rodriguez Karyna Rodriguez Co-Chair VP Global New Ventures, Searcher Seismic, UK
Emiliano Mutti, PhD Emiliano Mutti Committee Member University of Parma, Italy
Adriano Viana Adriano Viana Committee Member Petrobras, Brazil
Joris Eggenhuisen Joris Eggenhuisen Committee Member University of Utrecht, The Netherlands
Francois Raisson Francois Raisson Committee Member TOTAL, France
Ashley Clarke Ashley Clarke Committee Member BP, UK
Giancarlo Davoli Giancarlo Davoli Committee Member Global Geology Advisor, ENI, Italy
Juan Fedele Juan Fedele Committee Member ExxonMobil UIS, USA
Jon R. Rotzien Jonathan Rotzien Committee Member President, Basin Dynamics LLC, USA
David C. Mosher David Mosher Committee Member University of New Hampshire, Canada
Ricardo Pereira Ricardo Pereira Committee Member Snr Exploration Geologist, PhD, PARTEX Oil and Gas & Instituto Dom Luiz, Portugal
Gil  Machado Gil Machado Committee Member Tecnhical Director, Chronosurveys Lda & Instituto Dom Luiz, Portugal


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