The past two decades have seen major leaps in our understanding of the structure and dynamics of the continental lithosphere. These advances are due in large measure to the application of new technologies in such fields as deep seismic imaging, magnetotelluric sounding, deformation monitoring, geochemical tracing, and geodynamic modeling. In particular, systematic national programs cored by deep seismic profiling,such as COCORP (US), BIRPS (UK), DEKORP (Germany), ECORS (France) and LITHOPROBE (Canada), among others, have been especially effective in making major discoveries about the continents: lithospheric-scale detachments, deep fluid accumulations, mobile Mohos, laminated lower crust, and fossil subduction zones in the upper mantle being just a few.
The continental lithosphere remains a global priority for both
societal and scientific concerns. Key issues remain unresolved
and much of the world, including many critical geological features,
remain unprobed. This is especially true outside the industrialized
nations, where intrinsic resources for such efforts are particularly
difficult to obtain.
It is therefore not surprising that the scientific exploration
of the lithosphere has reached a new, more international phase.
Multinational consortia such as EUROPROBE,
and multinational projects such as URSEIS
and INDEPTH,
are an attempt to martial international expertise and resources
to investigate structures and processes of the continental lithosphere
that represent global scientific priorities. However, experience
with such efforts has also led to recognition that the science
could benefit from a more coordinated approach at the international
level.
With this in mind, the International
Lithosphere Program has approved a new international committee
with responsibility for stimulating, coordinating and reporting
new continental lithospheric studies from a global viewpoint.
The objective of the proposed committee is not to supplant, nor
to hinder, nor to constrain any individual, national or international
effort to study the continental lithosphere. To the contrary,
it is to help stimulate and facilitate such efforts.
This committee
is an outgrowth of grass-roots discussions held at the international
deep seismics symposia held at Asilomar, CA, in 1996, and Barcelona,
Spain, in 1998.
For more information, please contact one of the committee chairmen:
Larry Brown, Cornell University, U.S.
Onno Oncken, GeoForschungsZentrum
Potsdam, Germany
Barry
Drummond, Australian Geological Survey Organization
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Last Updated 4/9/99