towards revised stratigraphic columns for onshore and offshore areas of trinidad & tobago
DESCRIPTION
Towards Revised Stratigraphic Columns for Onshore and Offshore Areas of Trinidad & Tobago. Hasley Vincent & Philip Farfan GSTT Stratigraphic Discussion May 11 th 2013. Presentation outline. Background & Objective Proposal Format Timelines. 1955. Objective. To obtain; - PowerPoint PPT PresentationTRANSCRIPT
Towards Revised Stratigraphic Columns for Onshore and Offshore Areas of Trinidad & Tobago
Hasley Vincent & Philip Farfan
GSTT Stratigraphic Discussion May 11th 2013
Background & Objective Proposal Format Timelines
Presentation outline
1955
Objective
To obtain; support from the GSTT, participating companies &
professionals to establish a stratigraphic Sub-committee
To attract volunteers for the various posts that will be advertised
To get input from the collective attendees on issues that might help or hinder progress.
Background
14 years since last official update Adherence to International Stratigraphic Code Recent data, studies & findings Areal exclusion
Background
Formal Units Chronostratigraphic, lithostratigraphic, biostratigraphic Unconformity bounded, magnetostratigraphic polarity
Informal Units Electrical properties, seismic character, stable isotopes, heavy minerals
“way should be open to use any that promise to be useful belongs”
International Stratigraphic Guide, Second Edition, pgs. 8-9
“stratigrahic units must be properly proposed and described to be considered formal”
Stratigraphic Committee Proposal
Establish a Stratigraphic Committee with the goals of assessing the current status of the chart, implementing short term measures geared at addressing uncertainties and execute recommendations adhering to an established Stratigraphic Code
Stratigraphic Committee Objectives
To produce a modern Stratigraphic Chart that: Covers all the known basins across Trinidad and Tobago Meets or exceeds standards of science and
documentation established by the International Stratigraphic Guide
Updates or replaces existing nomenclature based on modern scientific research (biostratigraphy, seismic stratigraphy, lithostratigraphy, magneto-stratigraphy etc. )
Incorporates new data
Discern biostratigraphy from lithostratigraphy Consider seismic stratigraphic, mineralogical,
chemostratigrahical, etc. Zonations Status of type sections? Consider templates and individual stratigraphic
columns for individual basins Outdated lexicon What about Tobago? Incorporate extensive log and core database Provide for advances in regional correlation
(Barbados, Venezuela etc.)
Way Forward for the Trinidad &Tobago stratigraphic chart
Proposed Structure
Stratigraphic Sub Committee Chairman, nominated by the GSTT executive 4 executive members representative of key
stakeholders Stratigraphic Working Group
Volunteers GSTT Secretariat Report to the GSTT executive Budget allocation
Proposed Structure
GSTT EXECUTIVE
Stratigraphic Committee Executive1.Chairperson (chosen by GSTT Executive)2. MEEI representative3. Academic Representative4. Industry representatives5. GSTT secretariat Roles and responsibilities
Populates and gives direction to the Working Group
Develops Terms of Reference Solicits support from the companies Manages budget from the GSTT Conflict resolution and manage
expectations Liaison and communications with
stakeholders Next slide
Southern BasinNorthern RangeNorthern Basin TobagoNCMA ECMA Gulf of PariaDeep water
Southern BasinNorthern RangeNorthern Basin TobagoNCMA ECMA Gulf of PariaDeep water
Proposed Structure
Stratigraphic Working Group
Roles and responsibilities Expertise, assistance and compilation of
geologic information Identification of appropriate reference
material Compile, edit, write or forward
documentation when required Formal recommendations to
Stratigraphic sub-committee
Outputs
Collation and publication of type sections & basin templates
Research opportunities The establishment of sites of geological
interests that might be protected from development
A comprehensive field guide that will include type localities where ever possible
Log
Northern BasinLogs: SeismicLithology MYBP: Biostrat
Basin definition and locations of types sections
References
Attachments
Descriptions and definitions
Outputs – Template example
Questions
Litho- or Biostratigraphic?
Saunders et al., 1998
“Poor recovery” “ indeterminate” “no age specific fauna”
Plio-Pleistocene
Strongly
Biostratig
raphi
c
Strongly
Lithostr
atigra
phi
c
Backup