The Coordinating Committee for Geoscience Programmes in East and SE Asia (CCOP) is an intergovernmental geoscience organization based in Bangkok, Thailand. CCOP currently comprises 15 member countries in East and SE Asia; it has provided venues for various geoscientific programmes and activities in the region for over 50 years. At its inception, CCOP conducted work in geological surveys, exploration and technological cooperation in the extraction of off-shore petroleum and mineral resources in the region. In response to the needs of member countries, CCOP projects have become increasingly diverse over time, especially in the areas of groundwater resources, geohazards, global climate change and urban geology. Facing the imminent fourth industrial revolution, CCOP compiles, manages and utilizes large amounts of data collected and accumulated by its member countries, and increasingly focusses on data sharing, education and capacity building. With the vision of becoming a premier intergovernmental Earth science organization in East and SE Asia, CCOP's mission is the application of Earth science to make significant contributions to the economic development and sustainable environmental management of its member countries, enhancing their quality of life. To fulfil this mission, CCOP has developed four strategic foci: (1) outreach; (2) cooperation and partnership; (3) knowledge enhancement and sharing; and (4) data and information. Organization and management of CCOP are governed by a steering committee formed of permanent representatives from the 15 member countries and guided by recommendations from an advisory group comprising representatives from cooperating countries and organizations. The steering committee considers and endorses projects and activities planned and proposed by the technical secretariat, which oversees the management of the organization, implementing all approved plans for the benefit of all member countries as well as cooperating countries and organizations. CCOP has played important roles in providing venues for activities and collaboration on various Earth science topics, including energy and mineral resources, groundwater, geohazards, global climate change, urban geology, geoscience big data, education and outreach. CCOP also publishes regular and special publications describing its activities. In the future, CCOP will encourage non-members in the region to join as official member countries, and will further strengthen its network by conducting joint Earth science research projects with cooperating countries and organizations. CCOP will also pursue sustainability in research by establishing a system to continually nurture new Earth scientists. Furthermore, CCOP will build a cooperative network with geoscience communities in other regions to promote a sustainable Earth.
<p>Airborne geophysical data were used to analyze the complex structures of eastern Thailand. For visual interpretation, the magnetic data were enhanced by the analytical signal, and we used reduction to the pole (RTP) and vertical derivative (VD) grid methods, while the radiometric data were enhanced by false-colored composites and rectification. The main regional structure of this area trends roughly in northwest-southeast direction, with sinistral faulting movements. These are the result of compression tectonics (sigma<span style="font-size: 8px;">_1</span> in an east-west direction) that generated strike-slip movement during the pre Indian-Asian collision. These faults are cross-cut by the northeast-southwest-running sinistral fault and the northwest-southeast dextral fault, which occurred following the Indian-Asian collision, from the transpession sinistral shear in the northwest-southeast direction. Three distinct geophysical domains are discernible; the Northern, Central and Southern Domains. These three domains correspond very well with the established geotectonic units, as the Northern Domain with the Indochina block, the Central Domain with the Nakhonthai block, the Upper Southern Sub-domain with the Lampang-Chaing Rai block, and the Lower Southern Sub-domain with the Shan Thai block. The Indochina block is a single unit with moderate radiometric intensities and a high magnetic signature. The direction of the east-west lineament pattern is underlain by Mesozoic non-marine sedimentary rock, with mafic igneous bodies beneath this. The Nakhonthai block has a strong magnetic signature and a very weak radiometric intensity, with Late Paleozoic-Early Mesozoic volcanic rock and mélange zones that are largely covered by Cenozoic sediments. The boundaries of this block are the southern extension of the Mae Ping Faults and are oriented in the northwest-southeast direction. The Lampang-Chaing Rai and Shan Thai blocks, with very weak to moderate magnetic signatures and moderate to very strong radiometric intensities are dominated by marine clastic and igneous rocks or a northwest-southeast trending deformation zone of inferred Precambrian complexes, respectively. It is suggested that these tectonic plates collided against one another in a west-east direction.</p>
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