Overseas travel report : Hong Kong and China, 28 August - 22 September 1993

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Christie, A.B. 1994 Overseas travel report : Hong Kong and China, 28 August - 22 September 1993. Lower Hutt: Institute of Geological & Nuclear Sciences Institute of Geological & Nuclear Sciences science report 94/04 55 p.

Abstract: I travelled to Hong Kong and China, during 28 August - 22 September 1993 to attend the 16th International Geochemical Exploration Symposium (IGES), and visit several Chinese Institutes, the Hong Kong Geological Survey, and some potential geotechnical clients in Hong Kong. The IGES attracted more than 300 delegates from about 30 countries and consisted of two days of workshops, three days of plenary sessions, and field trips. I attended workshops and plenary sessions on four main themes: regional geochemical mapping, international geochemical mapping, environmental geochemistry, and exploration geochemistry. A workshop and several papers were presented on IGCP 259 International Geochemical Mapping (1988-1993) and plans for its successor IGCP 360 Global Geochemical Baselines (1993-1997). Information presented at the conference demonstrated that countries which have invested in regional geochemical mapping have benefited by the discovery of many new mineral deposits and the establishment of geochemical baselines for environmental studies and management. In most countries, government funding in geochemistry is now mainly directed to environmental surveys. Many problems of human, animal, and crop health have been correlated with regional geochemical features and appropriate remedies put in place. New Zealand would benefit from a similar application of regional geochemical surveys. I visited the Institute of Mineral Deposits and Institute of Geology in Beijing, and the Institute of Geophysical and Geochemical Exploration in Langfang. Topics and conditions of potential collaborative work were discussed. Projects for study in New Zealand include (1) metamorphic Au-W-Sb veins in Marlborough, (2) analyses of metals in rocks of the Hauraki Goldfield, (3) field geological mapping and associated petrological studies of Tertiary volcanic rocks in sheet T12, (4) analyses of stream sediment samples from the Hauraki Goldfield and Marlborough. Reciprocal work in China could include. (1) study of Chinese Au-W-Sb deposits, (2) geological mapping and related petrological studies of the Datan and Luotuogou quadrangles north of Beijing, and (3) participation in geochemical surveys of Northwest China. There are considerable expertise and analytical facilities, particularly in geochemistry, available in the institutes and joint projects would be of benefit to our Institute. As a first step, we should undertake some analytical work at the Chinese institutes. (auth)