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dressing on the foreshore of Sham Wan (1156 2000). Stone cutting can also be seen in coastalgranite exposures on islands such as Kau Yi Chau, Cheung Chau and Siu A Chau. The Chi MaWan peninsula, with outcrops of even textured medium-grained granite, has been extensivelyexploited along'its coast. Both Sha Chau and Tree Island in the northwest of the district have alsobeen sources of building stone.Aggregate production for construction has been confined to a small, temporary quarry at ShamWan on northwest Tsing Yi. The quarry was active during construction of the road across theisland, and is now moribund.Borrow areas in the district were, until recently, restricted. They can be found on east and southTsing Yi, and in the Barren Hills near Mui Wo. Urban and golf course development at DiscoveryBay, and shipyard development in Penny's Bay, have resulted in borrows in these areas. Thelargest borrow area in the district involved the reduction of Chek Lap Kok to about 8 mPD forthe airport development. The borrow started in 1991, and the project also resulted in additionalborrows on The Brothers islands, in northwest Tsing Yi and in northeast Lantau Island.152
REFERENCESAddison, R. (1986). Geology ofSha Tin. Geotechnical Control Office, Hong Kong, 85 p. (Hong Kong GeologicalSurvey Memoir No. 1).Allen, P.M. & Stephens, E.A. (1971). Report on the Geological Survey of Hong Kong, 1967-1969. Hong KongGovernment Press, 116 p. plus 2 maps (dated 1972).Bates, R.L. & Jackson, J. A. (1987). Glossary of Geology. American Geological Institute, Alexandria, Virginia,788 p.Bennett, J.D. (1984a). Review of Superficial Deposits and Weathering in Hong Kong. Geotechnical Control Office,Hong Kong, 51 p. (GCO Publication No. 4/84).Bennett, J.D. (1984b). Review of Hong Kong Stratigraphy. Geotechnical Control Office, Hong Kong, 86 p. (GCOPublication No. 5/84).Bennett, J.D. (1984c). Review of Tectonic History, Structure and Metamorphism of Hong Kong. GeotechnicalControl Office, Hong Kong, 63 p. (GCO Publication No. 6/84).Binnie Consultants Ltd. (1991). Soko Islands Area Final Assessment Report. Fill Management Study-Phase ELInvestigations and development of marine borrow areas. 81 p. (Report prepared for GeotechnicalEngineering Office, Hong Kong).Branney, MJ. & Kokelaar, B.P. (1992). A reappraisal of ignirnbrite emplacement: progessive aggradation andchanges from particulate to non-particulate flow during emplacement of high-grade ignimbrite. Bulletin ofVolcanology, vol.54, pp 504-520.Brand, E.W., Burnett, A.D. & Styles, K.A. (1982). The Geotechnical Area Studies Programme in Hong Kong.Proceedings of the Seventh Southeast Asian Geotechnical Conference, Hong Kong, vol. 1, pp 107-123.(Abstract published in Geotechnical Abstracts, 1984, no. GA 271.33).Brock, R.W. & Schofield, SJ. (1926). The geological history and metallogenetic epochs of Hong Kong.Proceedings of the Third Pan-Pacific Science Congress, Tokyo, vol. 1, pp 576-581.Brock, R.W., Schofield, SJ,, Williams, MY., Uglow, W.L. & Phemister, T.C. (1936). Geology of Hong Kong andLeased Territories. University of British Columbia, Vancouver, 300 p.Busby, J.P. & Langford, R.L. (1994). Interpretation of the regional gravity survey of Hong Kong. Hong KongGeologist, vol.1, no.2 , in press.Busby, J.P., Evans, R.B., Lam, M.S., Ridley Thomas, W.N. & Langford, R.L. (1992). The gravity base stationnetwork and regional gravity survey of Hong Kong. Geological Society of Hong Kong Newsletter, vol. 10,no, l,pp2-5.Cheung, P.C.T. & Shaw, R, (1993). Seamat Study: Final Report. Geotechnical Engineering Office, Hong Kong,163 p.Davis, S.G. (1952), The Geology of Hong Kong. Government Printer, Hong Kong, 231 p. plus 14 plates & 3 maps.Derbyshire, D.P.F. (1990), The Geochronology of Hong Kong. NERC Isotope Geosciences Laboratory, Keyworth,U.K., 33 p,Darbyshire, D.P.F. (1993), The Geochronology of Hong Kong II. NERC Isotope Geosciences Laboratory, Keywoth,U.K., 21 p.Electronic and Geophysical Services (1991), Regional Gravity Survey of Hong Kong t Final Report. Job NumberHK50190, Electronic and Geophysical Services Ltd, Hong Kong.153
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UNIVERSITY OF HONG KONGLIBRARIES
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© Government of Hong KongPublished
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CONTENTSTitle pagePage1ForewordCont
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Distribution and Lithology 73Detail
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Chapter 10 Economic Geology 149Intr
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(Plates)Plate 22 - Porphyritic Medi
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Table 1 — Grain Size Description
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0 1 2 3 4 5 k mCONTOURS AT 100m INT
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properties of the marine deposits b
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Archival DataAll records from the s
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Chapter 2Outline of GeologyThe soli
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The Mesozoic volcanic rocks are div
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Chapter 3Palaeozoic Sedimentary Roc
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Carboniferous metasedimentaiy rocks
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Plate 1 - Fining-Upward Sequence of
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Plate 3 - Well-bedded Sandstones an
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Reef Island. The northern end of th
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Table 3. Evolution of Nomenclature
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are crudely stratified and welded i
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Shing Mun FormationThe type localit
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Tai Che Tung. Crystal tuff, interpr
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Plate 7 • Lapilli-Ash Crystal Tuf
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Plate 11 - Pyroclastic Breccia (086
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appears fragmental, and contains mu
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exposures in the stream bed consist
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Lin Fa Shan. The steep eastern flan
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dipping northwest at 46°, is prese
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Sunset Peak MemberThe Sunset Peak M
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Plate 16- Block and Lapilli-bearing
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Chapter 5Major IntrusionsClassifica
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in grain size from 0.4 to 1.5 mm, a
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20 - Megacrystic Medium-grained Gra
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Pui O Wan. Porphyritic medium-grain
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minimum age of c. 145 Ma (see earli
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The granite on Chek Lap Kok is most
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Southeast of Tin Sam, on the wester
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About 1 km east of Nam Shan, exposu
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Plate 25 - Thin Section of Porphyri
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Chapter 6Minor IntrusionsIntroducti
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The microgranite grades southwards
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the Lantau Formation, however, and
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Plate 29 - Flow-banded Quartzphyric
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also cut volcanic rocks of the Tsue
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Silver Mine Bay. On the headland so
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Plate 33 - Core stone Development i
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Plate 37 - Thin Section ofLamprophy
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Pre-Yensfaanlan StructureWithin the
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separates areas of different lithol
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NeotectonicsFault activity in the r
Page 105 and 106: Chapter 8Metamorphism and Alteratio
Page 107 and 108: the majority of rocks in the distri
Page 109: Chapter 9Superficial GeologyIntrodu
Page 112 and 113: Detailstal O. Alluvial deposits for
Page 114 and 115: trains. The regolith on most steep
Page 116 and 117: Plate 44 - Boulder Debris on the So
Page 118 and 119: gazetted for recreational purposes.
Page 120 and 121: DetailsTai O. Extensive intertidal
Page 122 and 123: Plate 48 - Sandy Beach at Fan Lau S
Page 124 and 125: Pre-Chek Lap Kok Formation Deposits
Page 126 and 127: formation. The sequence is usually
Page 128 and 129: BOREHOLE NO: ESC 17GRID REFERENCE:
Page 130 and 131: BOREHOLE NO: A5/1GRID REFERENCE: 80
Page 132 and 133: formation, thinly laminated clays o
Page 134 and 135: Quinqueloculina seminulum, which is
Page 136 and 137: Channel and Transgressive Deposits.
Page 138 and 139: Figure 20 - Areas of Acoustic Turbi
Page 140 and 141: West Lamma Channel These may be att
Page 142 and 143: Figure 23 - Depth-Averaged, Maximum
Page 144 and 145: The formation is Holocene in age. T
Page 146 and 147: Boreholes (A5/1, A5/2, B2/1, ESC17
Page 148 and 149: Plate 51 - Deep Weathering Profile
Page 151 and 152: Chapter 10Economic GeologyIntroduct
Page 153: Non-metalliferous MineralsFissure v
Page 157 and 158: James, J.W.C. (1993). The offshore
Page 159 and 160: Sewell, R.J., Strange, PJ., Langfor
Page 161 and 162: Appendix 1Microfossils identified f
Page 163 and 164: Appendix 2 (continued)Sample HK9913
Page 165 and 166: Appendix 2 (continued)Sample HK1054
Page 167 and 168: Appendix 4aSelective normalized pal
Page 169 and 170: ,Appendix 5 -Radiocarbon and Other
Page 171 and 172: construction materials 151contact m
Page 173 and 174: molybdenite 149Mong Tung Hang 151Mo
Page 175 and 176: talus 107,115Tarn Tsui Wan 71,87Tan
Page 177: LB 555.125 G34 LGeology of Lantaii
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