Report No. : GEO Report No. 375

Report Title : Updating of Hong Kong Geological Survey 1:20,000-scale Maps Major Findings and Revisions Map Sheet 5 – Tsing Shan (Castle Peak) (2024), 35 p.

Author : N.M.C. Yim, T.K. Tse & D.L.K. Tang

Abstract

The 1:20,000-scale Geological Map Sheet 5 – Tsing Shan (Castle Peak) is the sixth map updated under the map updating programme, currently being undertaken by the Hong Kong Geological Survey of the Geotechnical Engineering Office. The first edition of Sheet 5 solid and superficial geology map was surveyed between 1984 and 1987, and was published in 1988. Reliability of the geological maps has been improved after incorporation of the vast amount of new information that has accumulated over the past thirty years, and advances in the understanding Hong Kong's geology since the published maps were first surveyed.

The key findings and revisions to Sheet 5 include: (a) revision of the nomenclature and classification of volcanic stratigraphy and intrusive rocks, (b) revision of the stratigraphy of the Tuen Mun Formation, (c) updating of the distribution of Kat O Formation in the Deep Bay area, (d) inferred distribution of subcrops of a Triassic granite and an undifferentiated granite in the Deep Bay area, and (e) review of the major lithologicalbounding faults in the district.

Download Document(s)