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aA /ChekLapKokYUE SHAN(LANTAU ISLAND)Silver&\Mine J*— -JSax ^ JAAbandoned mineFormer prospectMineral occurrenceAggregate quarryBorrow areaWPbFeCQKGTMineralsWolframite (Tungsten)Galena (Lead)Magnetite, Haematite (Iron)Graphite (Carbon)Quartz (Silica)Kaolin ClayGarnetFigure 24 - Distribution of Mineral Deposits in the District(Ruxton, 1958). The disused mine office (0907 1616) and remains of processing facilities 140 mto its south, are about 1 km east of Sha Lo Wan village, 500 m south of the office, there areextensive heaps of spoil and surface workings (089 157), from which trenches extend west for500m. Mining licences were in force for the Sha Lo Wan deposit between 1954 and 1961,although Ruxton (1957) saw little activity at the mine. Aerial photographs show that the minebuildings were occupied in 1963, but that all activity had ceased prior to 1973. Furtherprospecting for tungsten mineralization has taken place in central and northeast Lantau Island,and on Ma Wan and Tsing Yi, but no further significant mineralization has been recorded,Prospecting for iron ore, principally magnetite, took place in part of west Lantau Island, but onlyminor occurrences have been noted (Peng, 1978; Weld, 1915; Tegcngrcn, 1923), includingmagnetitic veins about 560m westnorthwest of San Tau, Magnetite is also a constituent of skammineralization. It is locally abundant in marbles, encountered in a few boreholes sunk on thereclamation east of Tung Chung Wai? s near Lau Fau Sha (e.g. boreholes TC65, 12196 16639,H12/17357, 12112 16599) and east of East Brother island (Borehole NS1/14460, 17111 21750).The skarn is commonly greenish-grey and in addition to magnetite, can include* epidotc, chlorite,augite and plagioclase. It occurs where the marbles are intruded by feldsparphyric dykes andgranites, and is mainly related to contact metamorphism, A skarn deposit has also boon recordedat San Shek Wan (0714 1612) (Peng, 1978), where it comprises a zone, about 5 m wide, at thecontact between foliated sandstone and megacrystic, fine-grained granite, It includes garnet,vesuvianite, diopside and epidote, in addition to scattered magnetite, To date, none of theoccurrences of skarn mineralization have been shown to contain economic quantities of anymineral./ isd