Projet 662 - Orogenic architecture and crustal growth from accretion to collision

Projet du PICG - réunion en 2018

Workshop and field excursion on Orogenic architecture and crustal growth from accretion to collision

  • 16-22 September 2018, China

16-20 September: A 5-day pre-workshop field discussion and training course "Field observation and mapping of an accretionary orogen: example from Liuyuan, Beishan, southwestern CAOB, NW China will be organized by Cees van Staal and Shoufa Lin (Canada). This field excursion will investigate ophiolites, granitoids, tectonics and crustal growth in the Beishan area of NW China.

21 September: A 1-day workshop will be held in the Chinese Academy of Geological Sciences, Biejing. It will discuss a research plan for IGCP-662, including annual field and laboratory work and workshop.


Bref résumé du projet

Orogenesis and crustal growth are widely discussed topics in the Earth sciences. Orogens can be generally grouped as: accretionary, collisional and intracratonic. However, how to define orogen types and describe their evolution? How to fingerprint different processes of orogenic development; what is role in metallogenic enrichment? These still remain to be answered.

The main objectives of this prooject are: 

  • to characterise differences in crustal formation and architecture between accretionary and collisional orogens;
  • to establish criteria to (semi-) quantitatively describe orogenic development through evaluation of the relative proportions of juvenile vs. reworked crust; and
  • to better understand the role of orogenic compositions on metallogenesis.

This project is  aiming to conduct comparative studies on the Central Asian Orogenic Belt (CAOB), the world’s largest Phanerozoic accretionary orogeny, and the Tethyan orogenic belt, the world’s youngest extensive collisional and metallogenic belt, as well as other composite orogens. The project will promote (semi-) quantitative descriptions of orogenic processes and continental growth, and their role in metallogenic enrichments. The results of this study may be helpful to discover new deposits. More than 13 developing and developed countries /regions will be involved. This will enhance cooperation of scientists from diverse social and political environments.

The co-leaders are from China, Russia, United Kingdom, Australia and Canada

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