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Appendix 2Selected Whole-rock XRF Geochemical Analyses of Volcanic and Intrusive Rocksfrom the District, Major oxides in wt% 9 trace elements in ppntSample HK9847HK8206HK9861HK8547HK9311HK8563Si02Ti02A12O3Fe203*MnOMgOCaONa20K2OP205Total71.430.4113.663.160.070.822.372.804.370.0999.1873.280.2413.382.080.090.512.890.825.690.0599.0373.230.2513.721.590.050.241.423.434.930.0698.9277.730.1712221060.020.140.443.004.430.0199.2276.750.0812.071.450.030.090.633.834.090.0199.0373.740.0914.981.270.070.050.672.116.110.0199.10LOI 0.680.960.70 0.610.650.98CrNiCoScVCuPbZn22116-41533482696-.133231163_238563529751271843132138391913313129SnWMo66-„321133126141SAs.-327_222763493RbBaSrGa213466182-29344816413264448181-2031325312301712143154210117NbZrTiYThU13140-39275151301439453781413214994340111614210193231439160480964272810754055327LaCe385722663855511014476653HK9847HK8206HK9861HK8547HK9311HK8563Lapilli-bearing coarse ash crystal tuff, Yim Tin Tsai Formation, Ma WanAsh crystal vitric tuff, Shing Mun Formation, Cheung ShaCoarse ash crystal tuff, Shek Lung Kung Member, Shing Mun Formation,YamOPorphyritic rhyolite lava, Lantau Formation, Tung Chung RoadTufHte, Lantau Formation, Lantau PeakEutaxitic coarse ash crystal tuff, Cheung Shan Member, Lantau Formation23930 2287012760 10695203652184011915 1259009555 1185511975 10575160
Appendix 2 (continued)Sample HK9913HK8426 HK8007 HK5531HK8200HK8029SiO2Ti02A12O3Fe2O3*MnOMgOCaONa2OK2OP2O5Total76.300.1414.621.700.010.230.140.104.470.0297.7372.870.2713.232.330.030.411.052.725.030.0998.0373.610.2413.312.220.060.401.473.094.950.0799.4263.600.7315.016.810.122.794.452.642.790.1499.0875.900.0712.601.270.080.070.713.395.270.0299.3874.510.2213.211.640.030.281.202.475.300.0598.91LOI 2.091.58 0.43 2.540.680.65Cr 22Ni 102..CoScVCu1Pb 16Zn 5Sn „W 4Mo 5S 184As 17Rb 268Ba 794SrGa 18Nb 28Zr 181Ti 839Y 35Th 46U 6La 14Ce 7220126..12335«.114712324911611519173161954305571072324-.-4333-5110151888541271617314143940274651594910192010671869222_-1405132291791854376341633065475133918105130018251025115420363994111102136181133812861931201411841319203291232IIK9913 Metatuffite, Pak Kok Member, Lantau Formation, Pak KokHK8426 Lapilli-ash crystal tuff, Sunset Peak Member, Lantau Formation,Yi Tung Shan! IK8007 Eutaxite, Mount Davis Formation, Kau Yi ChauHK5531 Granodiorite, Tsing Yi, Cheung Hong EstateHK8200 Medium-grained granite, Chi Ma WanHK8029 Porphyritic fine- to medium-grained granite, Mui Wo056000818014385 13175261501617528925 2346519160 1059519275 12620161
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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
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Chapter 8Metamorphism and Alteratio
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the majority of rocks in the distri
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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 and 154: Non-metalliferous MineralsFissure v
Page 155 and 156: REFERENCESAddison, R. (1986). Geolo
Page 157 and 158: James, J.W.C. (1993). The offshore
Page 159 and 160: Sewell, R.J., Strange, PJ., Langfor
Page 161: Appendix 1Microfossils identified f
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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