© ICDP, the International Continental Scientific Drilling Program, 1996-2020

www.icdp-online.org

Global Sea-Level Changes

global

new workshop-proposal: ICDP-2007/07
for the funding-period starting 2007-01-15
by Kenneth G. Miller, Craig S. Fulthorpe, Gilbert F. Camoin, Stephen Peter Hesselbo, André W. Droxler
Abstract
It has been 15 years since the last planning workshop for reconstructing the history of long-term sea-level changes. Significant progress has been made with ODP drilling on the New Jersey and Australian margins and the Bahamas, with onshore drilling and outcrop studies, and with pending joint IODP-ICDP of the New Jersey inner shelf. The drill still provides an unparalleled means of sampling Cretaceous to Holocene stratigraphic records and calibrating them directly to downhole logs and 3-D geometry afforded by seismic profiles. Recent drilling advances, including the use of mission-specific platforms, together with new views on the roles of tectonics and sediment dynamics, require that the scientific community re-evaluate the fundamental assumptions of sea-level studies. This workshop will be held in Oct. 2007 in Salt Lake City with a field trip to the classic sequence at Book Cliffs Utah. Funding is in hand for U.S. participants from JOI, DOSECC will provide support-in-kind and some funds to host the meeting, and Chevron will run the field trip. We seek funds from ICDP and IODP to cover travel expenses for international travel support.
Scientific Objectives
  • The proposed workshop will:
  • 1) review results of ODP and onshore drilling for sea-level objectives;
  • 2) reevaluate principles and strategies for studying sea-level change within IODP and ICDP; and 3) review geographical areas for future IODP-ICP drilling with optimum potential for resolving sea-level history during critical time periods. Issues to be addressed include:
  • 1) The importance of a process-oriented approach, in contrast to earlier strategies emphasizing testing the EPR model.
  • 2) Is the transect strategy still appropriate?
  • 3) The need for, and application of, 2D backstripping to extract eustatic amplitudes.
  • 4) Identification of small-scale events/cycles within sequences and determining the mechanisms responsible for long-period (>1 m.y.) sequences: what is the hierarchy of eustatic cyclicity?
  • 5) Use of integrated chronostratigraphic techniques to maximize dating precision.
  • 6) How/where to investigate eustasy in the Greenhouse world.
  • 7) Pre-drilling data requirements: are 3D seismic data needed? A fundamental goal will be to encourage submission of new sea-level proposals to both IODP and ICDP to augment those already in the system. We seek to foster collaborations between the onshore and offshore communities and to bring IODP and ICDP together in joint drilling.
Keywords
Chevron, Climate change, DOSECC, Global environment, ICDP, ICDP-2007/07, IODP, JOI, Lake drilling, Ocean drilling, Paleoclimatology, Sea-level changes
Location
global: 0, 0

© ICDP, the International Continental Scientific Drilling Program, 1996-2020

www.icdp-online.org