11-14 June 2019, VSEGEI employees participating in the CGMW Subcommissions for Northern Eurasia and for Tectonic Maps took part in a consultative meeting with the Bureau of the Commission for the Geological World Map (CGMW) (Paris, France).
According to the earlier agreement during the General Assembly of the European Geosciences Union in Vienna in April 2019 (EGU2019) between the Subcommissions for Northern Eurasia and for Tectonic Maps and the CGMW President Dr. Manuel Pubellier, it was decided to hold a special consultative meeting in Paris at the CGMW headquarters on pressing current issues of international mapping projects, in which both Russian CGMW Subcommissions participate. Since not all members of the Russian Subcommissions were present in Vienna and due to the very busy schedule of working meetings of the General Assembly, it was proposed to hold a flexible consultative meeting with the opportunity to consider and discuss the alleged issues in detail. Such a working meeting was scheduled for June 11-13 of this year. By bilateral agreement, the agenda included the following three questions:
1. New Tectonic Map of the Arctic at 1: 10M scale – TeMAr, its scientific content, prospects for further work on Arctic tectonics and the use of the published Tectonic Map of the Arctic in new international mapping projects.
2. Correlation between the current international projects International Tectonic Map of Asia – ITMA-5000 and International Tectonic Map of East and South Asia – ITMESA-5000.
3. Consideration of the legend to the World Map of Orogens and further plans for the implementation of the IGCP667 project (project manager CGMW President Dr. Manuel Pubellier).
Consultative meeting was attended by the CGMW President Dr. Manuel Pubellier, previous (2010-2018) CGMW President Dr. Philippe Rossi, CGMW Deputy Secretary General Dr. Bruno Vrielynck, and CGMW Executive Manager Dr. Camille François. The Russian Subcommissions were represented at the working meeting by Vice President of the Subcommission for Northern Eurasia Dr. Oleg Petrov, President of the Subcommission for Tectonic Maps Academician Alexander Khanchuk, Secretary General of the Subcommission for Tectonic Maps Dr. Igor Pospelov.
Participants of the Consultative Working Meeting (from left to right): I. Pospelov, M. Pubellier, O. Petrov, B. Vrielynck, Ph. Rossi, A. Khanchuk, C. François
Consultative Meeting was opened by the CGMW President Dr. M. Pubellier. He congratulated the participants on the successful completion of the international project and publication of the Tectonic Map of the Arctic – TeMAr, as well as a special booklet for the map with its brief characteristics and substantiation of major scientific achievements during the map compilation.
Final report on the completed project was made by Editor-in-Chief of the Tectonic Map of the Arctic, CGMW Vice President for Northern Eurasia, Dr. Oleg Petrov “New Tectonic Map of the Arctic” on behalf of the team of authors: O. Petrov, S. Shokalsky S. Kashubin, I. Pospelov, and T. Tolmacheva. First of all, Dr. Petrov in his presentation disclosed the history of the participation of the CGMW Subcommissions for Tectonic Maps and for Northern Eurasia (until 1996, for the USSR) in the international mapping projects in the field of tectonics, and then elaborated on the consideration of previous tectonic maps of the Arctic (1959, 1963, and 1982). He noted that the priority of Soviet and Russian experts in the field of tectonic mapping is preserved in compiling tectonic maps of the Arctic. Therefore, the main responsibility for compiling the Tectonic Map of the Arctic fell on geologists mainly from VSEGEI and the Russian Academy of Sciences. The author examined in detail the Legend to the Tectonic Map of the Arctic, which was recommended by the CGMW as typical when compiling tectonic maps at scales 5M and 10M under the auspices of CGMW.
Booklet, written by most of the authors of the map, considers the scientific content of the map in relatively detail. Here we address a number of additional inset maps, justification of the structure and age of the Arctic basement, crustal types, thickness of the consolidated crust, and separately sedimentary cover. Dr. Petrov emphasized that the Tectonic Map of the Arctic, both by tectonic features and by geophysical studies, clearly shows the boundary of lithospheric plates, Eurasian and North American. It passes not only through active seismic morphostructures in the oceanic basin itself, but also in the continental part of Northeast Asia.
When discussing the Tectonic Map of the Arctic, the CGMW Bureau expressed the hope that this map would receive a great international vocation, as it previously received support from the Earth Sciences Division of the Russian Academy of Sciences. The influence of this map on the delimitation of the continental shelf in the Arctic Ocean in accordance with the Submission to the CLCS was discussed.
On the second issue, on behalf of both Subcommissions, Secretary General of the Subcommission for Tectonic Maps Dr. Pospelov made a message.
I. Pospelov making the presentation “Legends ITMA and ITMESA – Comparison”
First, he informed the CGMW Bureau about the First Russian-Chinese Workshop on the international CGMW projects ITMA and ITMESA held in Beijing at the Chinese Academy of Geological Sciences in October 2018, the first of which can be supported by the Russian Subcommissions, and the second, by the Subcommission for South and East Asia (Chinese Academy of Geological Sciences). Both projects have a common area, and a significant part of the Chinese project was carried when compiling the Tectonic Map of Northern, Central, and Eastern Asia at 1: 2.5M scale. Both parties exchanged legends, each to their own project. In the course of a home analysis of legends, VSEGEI employees from both Subcommissions concluded that both legends have significant inconsistencies in the image of formation complexes, structural elements, etc. Since a significant part of ITMESA has already been drawn up, although in the legend at 1: 2.5M scale, the Subcommission for Tectonic Maps requested the CGMW Bureau to support the legend for the Tectonic Map of the Arctic, recommended for tectonic maps of the Commission, not to start the ITMESA project “with zero”. Dr. O. Petrov expressed a similar opinion.
As a result of this communication, an official letter was drawn up to the Subcommission for South and East Asia with a request to consider a single legend for both projects in the autumn (October-November) of 2019 during the Second Workshop in Beijing in 2019.
The third issue on the meeting agenda related to the legend to the World Map of the Orogens, a discussion on which began back in April in Vienna at the EGU2019 General Assembly.
Dr. M. Pubellier showed the changes in the legend structure, which took place over two months, and Dr. C. François in her presentation showed its use exemplified by Africa’s multiple-aged orogens.
M. Pubellier, A. Khanchuk and O. Petrov (from left to right) discussing the legend to the World Map of the Orogens
The first working geological field trip under the project with a discussion of the state of affairs on the mapping is planned to be held in autumn 2020 in Corsica.