FIRST CIRCULAR, OCTOBER 2000
We are pleased to invite you to participate in The Fourth
International Workshop on Orogenic Lherzolites and Mantle Processes
to be held from August 26 to September 3, 2002 at Samani, Hokkaido,
Japan. The main aim of the Workshop Series has been to present
new data on mantle-derived ultramafic and related rocks (orogenic
lherzolites, ophiolitic peridotites, xenoliths in volcanic rocks),
and to discuss how data from diverse disciplines including experimental
and theoretical, geological, geochemical and geophysical approaches
can be used to understand mantle processes.
The Samani Workshop will place special emphasis on research topics
such as: (1) origin of heterogeneity on various scales as documented
in mantle derived ultramafic rocks with particular emphasis on
mechanisms for forming layered structures; (2) mechanisms of
melt production and modification of partial melts during melt
segregation, melt transport, and mantle-melt reactions; (3) rheology
of solid and partially molten mantle and large scale flow dynamics
in the mantle; (4) recycling and processing of lithosphere into
the mantle on local and global scales and the geochemical evolution
of the Earth's mantle.
The Samani Workshop will consist of a three-day indoor meeting
(August 29-31) coupled with a two-day field excursion in the
Horoman peridotite. The same field trip will be given before
(August 27-28) and after (September 1-2) the indoor meeting.
Scientific presentations will be made in oral and poster sessions.
Concurrent sessions will be avoided in order to insure sufficient
exchange of ideas and equitable exposure for both oral and poster
presentations. The indoor meeting will be held in the Town Hall
of Samani, which is near the Horoman peridotite thereby facilitating
easy access to the complex. In addition, the Town Hall has a
garden with scientific exhibition of polished large samples of
the peridotite, an ideal location for informal discussions during
the indoor meeting days.
Samani is a local small town (inhabited by 6400 people) located
about 200 km southeast of Sapporo. It is a quiet, peaceful town
blessed with a moderate climate, beautiful land and the seascapes
and of course the peridotite mountains.
Proceedings: A series of research papers that will be peer-reviewed,
is intended to be published in an international journal within
one year of the meeting. Previous workshop research papers were
published in a Special Volume of the Journal of Petrology in
1991 (First Workshop 1990 - Montpellier) and Chemical Geology
in 1996 (Second Workshop 1995 - Granada) and are scheduled to
be published in the Journal of Petrology in 2001. (Third Workshop
1999 - Pavia).
As mentioned above, a two-day field excursion to the Horoman
peridotite will be placed before and after the indoor meeting.
(We will repeat the same excursion in order to accommodate large
numbers of participants; attendees who wish to see the Horoman
peridotite in the field must choose only one of the two times).
In addition, following three post-workshop field excursions to
other ultramafic complexes and xenolith localities are being
(1) Sept. 1-3, deep seated crustal rocks and a gabbroic complex
in the Hidaka metamorphic belt and the Iwanaidake peridotite
in the Kamuikotan belt, Hokkaido islandªFcrustal section of a
juvenile continental crust (granulite, migmatite, layered gabbro)
and a ophiolitic peridotite.
(2) Sept. 3-6, Hayachine and Miyamori ultramafic complexes in
the Kitakami mountains,north-eastern Honshu island: multi-stage
and open-system magmatism in the Ordovician supra-subduction
zone ophiolite (hornblende- and phlogopite-bearing peridotites,
hornblendite, and hornblende gabbros).
(3) Sept. 3-8, A tour of xenolith localities for peridotite and
related rocks on the Japanese island arc (Ichinome-gata, north-eastern
Honshu island, Takashima and Kurose, northern Kyushu island).
In order to be financially reasonable, each of these field
trips requires a minimum number of participants. More information
and details of the trips, including approximate cost will be
given on the Workshop WWW pages.
Organizing Committee: M. Obata (Kyoto), S. Arai (Kanazawa), K. Niida
(Hokkaido), K. Ozawa (Tokyo), E. Takazawa (Niigata) , N. Takahashi
(Chiba), M. A. Menzies (London), J-L. Bodinier (Montpellier)
M. A. Menzies (London), J-L. Bodinier (Montpellier), A. Nicolas
(Montpellier), A. W. Hofmann (Mainz), F. A. Frey (MIT), N. Shimizu
(Woods Hole), G. Piccardo (Genova), R. Vanucci (Pavia), D. Kohlstedt
(Minnesota) and others.
Field Leaders: Horoman
peridotite: K. Niida (Hokkaido); Hidaka and Kamuikotan belts:
J. Maeda (Hokkaido); Hayachine-Miyamori complex: K. Ozawa (Tokyo);
Xenoliths: S. Arai (Kanazawa)
A second circular that contains full information about the scientific
program with abstract format together with registration forms
will be forwarded in September, 2001 to those scientists declaring
their interest in this workshop by returning the following:
Street ZIP code City
Preferred mailing address:
Telephone: Fax: E-mail:
I intend to submit a paper
YES (If appropriate, please indicate tentative a title or topic
to be dealt with)
Please indicate in [ ] your interest in participating in the
field tours: Horoman peridotite
[ ] Pre-indoor meeting
[ ] Post-indoor meeting
[ ] (1) mafic-ultramafic complexes in the Hidaka Mountains and
[ ] (2) Hayachine and Miyamori ultramafic complexes,
[ ] (3) xenolith localities.
(Please note that the post-indoor meeting Horoman field trip
overlaps in time with the post-conference field trip #(1) (the
Hidaka Mountains). Therefore, those who wish to attend both the
Horoman and the Hidaka excursions must choose the pre-indoor
meeting trip for the Horoman.)
World Wide Web page
The Lherzolites Workshop WWW page will be updated on a regular
basis from October 2000. All information in this circular will
be included as well as the conference themes, more information
on the field excursions, and the lists of participants.
WWW address: http://earth.s.kanazawa-u.ac.jp/LherzoliteWorkshop2002/
Interested person should send above information to E. Takazawa
by e-mail (firstname.lastname@example.org)
or fax (+81-25-262-6194). If you have a question or a problem,
please contact either
M. Obata (email@example.com)
or E. Takazawa.