Local Field Trips

6th-gstt

Local Field Trips:

The 6th Geological Conference of the GSTT will feature 5 local field trips throughout the length and breadth of Trinidad. Field trips will focus on re-examining controversial outcrops charged with our new ideas and technologies to generate new models or reconfirm previous models.

All field trips commence at the Hyatt Regency Hotel. Buses will depart the hotel at the specified times (see times listed for each trip below). Each attendee will receive a hard copy of the field guide for their trip. Transportation and Security is provided courtesy the University of the West Indies. A GSTT First Aider will also be on each trip.

All trips are inclusive of lunch, drinks, ground transportation and field guides.

LOCAL FIELD TRIPS UPDATE

For a limited time only, all Trinidad Local Field trips are now offered to Financial members of the GSTT at a rate of $60 USD per trip.

Field Guides sponsored by Petrocom Technologies

Petrocom

Transportation and Security sponsored by the University of the West Indies, St. Augustine Campus. 

 

Sunday 21st May 2017   

1. Central Range – Sedimentary and Structural History, Paleotectonics, Neotectonics and Petroleum Systems

Led by Mr. Philip Farfan, Prof Brent Wilson and Prof John Weber

Transportation: Bus departs Hyatt Regency at 7:00am. Expected return to Hyatt Regency at 6:00pm

cr_1

This trip will focus on recent advances in our understanding of the sedimentary rocks, structures, thermal and deformation history, neotectonics, and tectonic geomorphology of the Central Range. Late Cretaceous outcrops of the Naparima Hill Formation at San Fernando preserve and expose some of Trinidad’s oldest sedimentary rocks and earliest contractile structures. Here, we will examine evidence for multiple episodes of deformation that occurred both during and after oil migration, including fault-slip data, hydrocarbon lubricated thrusts, blind thrusts, injection features, and widespread calcite with oil inclusions that was precipitated in open fractures and veins. New insights into the thermal and structural history of these rocks in the core of the Central Range, as well as those on its flanks, as revealed by new AFT and ZR He data, detailed structural analyses, and paleomagnetism, will be incorporated into our field stops. We will also examine tilted Tertiary strata on the north and south flanks of the Central Range.  Recent developments in chronostratigraphic and lithosratigraphic shelf-slope-basin relationships will be used to constrain models for the paleogeographic and early tectonic evolution of the Central Range. Recent studies of the Miocene Cunapo conglomerate on the titled north flank of the range will be use to develop a model for early mid-Miocene hinterland exhumation, foreland flexure, and foreland basin infilling.  On the south flank, we will examine the heterogeneous and chaotic sedimentary assemblages in the Nariva Formation (Oligocene) beds at Corbeaux Hill, Piparo Area and speculate on the the deposition of this enigmatic package.  We will examine the variety of sedimentological types, mineralogy, provenence, environments of deposition, exotic microfaunal assemblages of Nariva sandstones, and relate these features to shelf-slope-basin connections and deposition. The neotectonics and tectonic geomorphic story of the Central Range and Central Range Fault will also be examined en route and at several possible key stops.

 

 

Thursday 25th May 2017 

2. Exploration of South West Peninsula Mud Volcanoes, Cedros Oilfield & Galfa Point

Led by Dr. Krishna Persad & Mr. Curtis Archie

Transportation: Bus departs Hyatt Regency at 6:00am. Expected return to Hyatt Regency at 6:00pm

galfa

 

3. Reservoir Characterization – Mayaro Fm

Led by Dr Tricia Alvarez & Dr Maria Ramnath

Transportation: Bus departs Hyatt Regency at 6:00am. Expected return to Hyatt Regency at 6:00pm

mayaro

Columbus Basin, offshore Trinidad is a mature hydrocarbon producing basin encompassing numerous major fields where production to date has been dependent upon ‘Conventional Pay’; usually characterized as thick, stacked highly continuous deltaic reservoirs. These reservoirs are estimated to contain more than 25 TCF of proven gas reserves and over one billion barrels (BBL) in oil produced. As these fields are now in decline thin bedded sands are being considered as a practical ‘secondary pay’ target. This basin is exceptional as rocks analogous to the subsurface reservoir are exposed along the Mayaro coastline of Trinidad forming the focus of this field trip.

Conventional reservoirs are relatively easy to characterise and predict reservoir properties. However, thin bedded sands are defined as highly interbedded sandstones and mudstones which are below conventional logging tool resolution. They can range from meters at outcrop to cm-mm scale in core. As a consequence of these characteristics, they are deemed unpredictable; therefore knowledge of their petrophysical properties and fluid flow behaviour patterns are limited. The focus of the trip is to examine the MB5 and MB8 outcrops at Mayaro Bay for the purpose of reservoir characterization; including quality and connectivity of reservoir facies, for both conventional and secondary thin-bedded pay.

 

Friday 26th May 2017        

4. Reservoir Characterization – Morne L’Enfer & Erin Fms – Vessigny & Stollmeyer Quarry

Led by Ms. Annalize McLean, Dr. Ryan Ramsook

Transportation: Bus departs Hyatt Regency at 7:00am. Expected return to Hyatt Regency at 6:00pm

smq

 

 

5. Caroni Piggy-Back Basin Fill – Miocene to Recent Deposits of Fishing Pond Bay

Led by Ms. Georgia Huggins, Prof Brent Wilson & Mr. Philip Farfan

Transportation: Bus departs Hyatt Regency at 7:00am. Expected return to Hyatt Regency at 6:00pm

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The Caroni Piggy Back Basin located within the centre of the island of Trinidad between the Northern and Central Ranges, sits within a complex transpressional zone that defines the margin between the South American and Caribbean Plates. This basin’s infilling provides vital clues of the evolution of the region. The main goal of this field trip is to observe the facies and stratigraphic architecture of the Miocene to Pleistocene basin fill of the Caroni Piggyback Basin within Fishing Pond Bay where almost 1km of well exposed cliffs offers the opportunity to observe spectacular depositional geometries documenting three stages of the evolution of the basin infilling. Manzanilla formation deposits at the southernmost part of the bay provide a look at the basin during the Late Miocene during the start of rapid infilling. A dramatic unconformal surface separates these strongly wave influenced deposits from the remarkable tidal deposits of the Late Pliocene Springvale formation. The Springvale affords exceptional examples of tidal channels and classical tidal bedforms including tidal budding, fluvial channels, coals and soil horizons. At the upper part of the Springvale on the northern end of the bay a dramatic drowning event can be observed which lead to deposition of the marine Talparo formation, limited exposures of which will be observed at the end of the trip.