IEG 환경지질연구정보센터
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전체 글
(2) . The Preliminary Study for Genetic Environment of the Gem Fields in the Pailling Area, Cambodia In Joon Kim* Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, Korea This study, one of the projects for investigation of the precious metal deposits of the Circum-Pacific Ocean countries, was performed in a gem field of Pailling, Cambodia, in which there are numbers of undeveloped mineral resources. The gem fields in the Pailling area are typically distributed in the laterite, lying on of weathered basalts. The gem grade of corundum is low in the surface soil horizon(less than 1 m in depth), but is higher in the subsurface. Occurrence and genetic environment of the precious stone are not concerned in the soils. A precious stone that is already made from at the least upper part of volcanic rocks is produced in large quantities to undergoing to weathering of the rocks. A precious stone is made from upper part of the formation under the high temperature when volcano is vomiting or after vomiting, and/or made from between the formation under the high temperature when other volcano is vomiting. Volcanic rocks including precious stone are a little different from other volcanic rocks when volcano is vomiting, but chemical composition of rocks is not far different from other volcanic rocks.. Cambodia, basalt, laterite, ruby, sapphire..
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(13) . *Corresponding author: [email protected]. . .
(14) . . Distribution of gem deposits of ruby, sapphire and zircon in the Cambodia and Indochina region.. Geological map of the Pailling gem field, Cambodia.. % S d Z @p o % #$ . _@D 3. @3 ].. <68P HIJPL U N 8cde fgh3 ^_iZ <jk 8P HIJP LN l=m noX U 8c < fg1F p#Lq N l=m U N 8c< fgh3 riZ <jk 8P H IJPL N l=m noXU 8c< fg 1F p#Lq l=m U N 8 c< fgh3 'Z stW XY-. XuPL K6M N l=m vwxU N 8c < 6@p
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(27) . . $. . Chemical compositions of major (wt.%), trace (ppm) and REE (ppm) elements for fresh basalts, altered basalt and soil samples from Pailling area..
(28) . Pa1 basalt 036.90 004.53 018.56 020.45 000.29 003.44 003.95 000.79 000.53 001.27 009.76 100.47 761 056 114 298 032 125 191 028 381 008.78 002.40 230 036 181 321 191 149 094.2 088.9 057.1 050.8 038.4 030.2 021.8 016.4 014.2 012.2 010.6 008.9. altered. SiO2 TiO2 Al2O3 Fe2O3 MnO MgO CaO Na2O K2O P2O5 Ig.loss Total Ba Cu Co Cr Li Nb Ni Sc Sr Th U V Y Zn Zr La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu. Pa2. Pa3. Pa4. Pa5. Pa6. Pa7. basalt. basalt. soil. soil. basalt. basalt. 036.68 003.85 015.31 019.15 000.24 007.65 007.65 001.27 000.75 001.06 006.72 099.83 950 071 089 241 037 099 227 021 533 07.13 01.78 245 035 164 264 156 112 097.5 074.6 048.2 043.2 33.6 26.4 19.4 14.6 13.0 10.6 09.4 08.0. 036.04 004.67 021.98 022.06 000.34 001.38 001.38 000.45 000.38 000.86 011.25 100.10 951 084 130 269 056 124 228 027 295 08.60 01.92 264 030 174 323 139 134 086.8 073.0 042.5 037.4 029.1 023.2 017.5 013.1 011.9 010.3 009.5 008.0. 036.70 004.60 018.78 021.23 000.27 002.82 002.82 000.69 000.52 001.28 009.59 099.71 738 077 110 259 031 124 212 025 356 08.360 02.46 238 031 167 323 168 129 105 077.8 049.3 043.5 032.0 025.1 018.1 013.2 011.5 009.7 008.7 007.1. 042.88 003.18 014.05 015.01 000.19 007.71 007.71 001.53 000.63 001.00 004.93 099.73 1009 051 073 146 027 088 148 16 701 006.73 001.64 239 030 137 230 158 109 094.2 072.7 045.9 040.0 032.0 024.5 018.1 013.7 011.9 009.7 008.5 007.1. 041.20 003.46 015.17 016.75 000.21 006.93 006.93 001.39 000.69 001.02 005.99 099.69 1030 058 083 183 033 097 177 021 599 007.18 001.77 254 035 152 253 156 110 095.0 072.9 046.2 040.4 032.2 024.9 018.4 013.7 012.1 010.0 008.8 007.4. 044.54 002.96 013.29 013.97 000.20 006.45 006.45 002.65 001.07 001.16 003.51 099.77 698 051 067 107 024 094 097 017 972 007.36 001.74 225 029 127 237 172 124 102 076.5 047.6 040.5 031.7 024.0 017.2 013.1 011.0 009.1 007.9 006.5.
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(30) . . Variation of (La/Yb)n vs. Nb for the rocks and soil samples of the Pailling gem field, Cambodia. Trace elements variation diagram for the rocks and soil samples of the Pailling gem field, Cambodia (Pa1= altered basalt, Pa2, 3, 6, 7=fresh basalt. Pa4, 5=soils).. (P2O5/K2O)n vs. K2O for the rocks and soil samples of the Pailling gem field, Cambodia.. Chondrite-normalized concentration of REE for the rocks and soil samples of the Pailling gem field, Cambodia (Pa1=altered basalt, Pa2, 3, 6, 7=fresh basalts. Pa4, 5=soils).. P AwV23 8z PL U 8 7 PL îþ 8<D $G 8PL îþ 8<F $G :? Z G S G < Çç Þ S Û4 8 <3 < 8P 5 f É % -F &' P 5 4f ×4~ e84 ¾G { 3 P AwA< f% 4 Û4~ @D < Û4 ~ Pe @D Û4~ ôG 4% |
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