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Home My WebLink AboutGMC Data Report No. 039THIN SECTION PETROGRAPHY Pan Am Hoodoo Lake Unit #2 2070-2100 Litharenite, fine grained, detrital grains; volcanic rock fragments (45%), volcanic glass (20%), quartz (15%), biotite (5%), glauconite (5%), amphibole (5%), feldspar (5%) no observable porosity, slightly compacted, pores filled wi th clinoptilolite. 2100-2130 Feldspathic litharenite, fine to medium grained, detrital grains; volcanic rock fragments (50%), feldspar (30%), quartz (15%), minor amphibole, glauconite, biotite and volcanic glass, no observable porosity, moderately compacted, grains coated with montmorillonite, pores filled wi th clinoptilolite. 2520-2550 Litharenite, very fine to fine grained, detrital grains; volcanic rock fragments (60%), volcanic glass (10%), feldspar (20%), quartz (10%), no observable porosity, severely compacted, smectite cement. 3000-3030 Litharenite, coarse grained, detrital grains; volcanic rock fragments (70%), feldspar (20%), quartz (5%), volcanic glass (5%), minor glauconite, porosity less than 1%, secondary, sl i ghtly compacted, chlorite pore fill and rim cement, clinoptilolite replacement and cementation. 3610-3630 Litharenite, medium to coarse grained, detrital grains; volcanic rock fragments (65%), volcanic glass (10%), feldspar (10%), quartz (10%), glauconite (5%), minor chert, no observable porosity, severely compacted, laumontite pore fill, chlorite cement, calcite replacement of detrital grains. 4460 -4480 Litharenite, medium to coarse grained, detrital grains; volcanic rock fragments (70%), feldspar (15%), volcanic glass (10%), quartz (5%), minor glauconite, porosity less than 1%, secondary, 3 severely compacted, smectite cement, chlorite pore fill, mi nor zeolite pore fill. 4480 -4500 Litharenite, very coarse grained, detrital grains; volcanic rock fragments (80%), feldspar (10%), quartz (5%), minor §lauconite (5%), minor volcanic glass, no observable porosity, severely compacted, smecti te cement, zeolite pore fill and replacement of volcanic rock fragment. 4920-494O Litharenite, fi ne to coarse grained, detrital grains; volcanic rock fragments (65%), feldspar (15%), quartz (10%), glauconite (10%), no observable porosity, severely compacted, chlorite and smectite cement, patchy carbonate cement, brown opaque material infilling pores. 4940 -4960 Litharenite, very fine grained, detrital grains; volcanic rock fragments (70%), glauconite (15%), feldspar (5%), quartz (5%), volcanic glass (5%), no observable porosity, severely compacted. 5280-5300 Litharenite, very fine to fine grained, detrital grains; volcanic rock fragments (75%), feldspar (10%), quartz (5%), volcanic glass (5%), glauconite (5%), no observable porosity, severely compacted, laumontite pore fill, carbonate replacement of detrital grains. 6000-6010 Litharenite, medium grained, detrital grains; volcanic rock fragments (65%), feldspar (20%), quartz (15%), no observable porosity, severely compacted, fractures filled with calcite, feldspar altered to kaolinite. 6960-6980 Feldspathic litharenite, fine to medium grained, detrital grains; volcanic rock fragments (55%), feldspar (30%), quartz (15%), porosity less than 1%, fracture, severely compacted, feldspar altered to kaolinite, smectite cement. 7560-757O Litharenite, medium to coarse grained, detrital grains; volcanic rock fragments (70%), feldspar (20%), quartz (~0~), no observable porosity, severely compacted, carbonate cement and replacement of detrital grains. 7570-7580 Feldspathic litharenite, fine to medium grained, detrital grains; metamorphic and volcanic rock fragments (40%), altered feldspar (40%), quartz (20%), no observable porosity, severely compacted, blocky calcite and chlorite cement, feldspar replaced by calcite. 7580-7590 Lithic arkose, fine to medium grained, detrital grains; feldspar (50%), rock fragments (30%), quartz (20%), no observable porosity, severely compacted, smectite cement, feldspar altered to kaolinite and calcite. 7590-7600 Feldspathic litharenite, very fine grained, detrital grains; feldspar (40%), rock fragments (40%), quartz (10%), unidentified dark opaque material (10%), no observable porosity, severely compacted, feldspar altered to kaolinite. 7690-7700 Litharenite, very fine to fine grained, detrital grains; metamorphic and volcanic rock fragments (50%), quartz (25%), feldspar (20%), biotite (5%), no observable porosity,. .. severely compacted, feldspars altered and replaced by calcite. 7700-7710 Lithic arkose, coarse to very coarse grained, detrital grains; monocrystalline and polycrystalline quartz (50%), ~eldspar (30%), metamorphic and volcanic rock fragments (20%), no observable porosity, severely compacted, smecti te cement, calcite replacement of feldspar. 7710-7720 Litharenite, medium grained, detrital grains; metamorphic and igneous rock fragments (65%), feldspar (20%), monocrystalline and polycrystalline quartz (15%), no observable porosity, severely compacted, smectite cement, minor calcite replacement of feldspar. 7720-7730 Feldspathic litharenite, medium to coarse grained, detrital grains; rock fragments (40%), monocrystalline and polycrystalline quartz (20%), feldspar (30%), calcite (10%), no observable porosity, severely compacted, carbonate and smectite cement, feldspar altered to kaolinite and calcite. 7730-7740 Feldspathic litharenite, fine to medium grained, detrital grains; volcanic rock fragments (40%), monocrystalline and polycrystalline quartz (30%), feldspar (30%),'minor unidentified dark opaque material, no observable porosity, severely compacted, feldspar severely altered, smectite cement, carbonate replacement of detrital grains. 7950-7960 Litharenite, medium to coarse grained, detrital grains; volcanic rock fragments (50%), quartz (30%), feldspar (10%), calcite (10%), no observable porosity, severely compacted, smectite grain rims, microquartz and kaolinite pore filling, calcite fracture filling. 7960-7970 Litharenite, medium to very coarse grained, detrital grains; plutonic and volcanic rock fragments (50%), polycrystalline quartz (30%), chert (10%), feldspar (10%), no observable porosity, severely compacted, quartz overgrowths, calcite and quartz fracture filling, calcite replacement of feldspar. 7970-7980 Litharenite, medium to coarse grained, detrital grains; plutonic and volcanic rock fragments (50%), polycrystalline and monocrystalline quartz (20%), feldspar (20%), chert (10%), no observable porosity, severely compacted, 10% calcite cement, feldspars altered to calcite. 8190-8200 Litharenite, coarse to very coarse grained, detrital grains; rock fragments (80%), feldspar no observable porosity, severely compacted, feldspar altered and replaced by calcite, unidentified black opaque material common, smecti te cement. (10%), quartz 8520 -8530 Litharenite, very fine to fine grained, detrital grains; rock fragments (80%), quartz minor unidentified black opaque material, no observable porosity, severely compacted, sericite cement, chlorite rims, carbonate replacement of detrital grains. (10%), feldspar (10%), 8530-8540 Lithic arkose, fine to medium grained, 10 detrital grains; quartz (40%), feldspar (30%), rock fragments (20%), calcite (10%), no observable porosity, severely compacted, sericite and chlorite cement. 9000-9010 Litharenite, very fine grained, detrital grains; rock fragments (80%), calcite (10%), unidentified dark opaque material (5%), feldspar (5%), minor quartz, no observable porosity, severely compacted, sericite matrix. 9400-9410 Calc-litharenite, fine grained, detrital grains; calcite (55%), quartz (15%), feldspar (15%), rock fragments (15%), no observable porosity, severely compacted, carbonate cement. 9800-9810 Litharenite, very fine to fine grained, detrital grains; quartz (40%), rock fragments (30%), feldspar (15%), calcite (10%), biotite (5%), ~. no observable porosity, 11 severely compacted, sericite matrix. 10000-10010 Arkose, fi ne grained, detrital grains; feldspar (45%), quartz (30%), biotite (10%), amphibole (5%), calcite (5%), rock fragments (5%), no observable porosity, severely compacted, chlorite cement, quartz overgrowths. 10380-10390 Arkose, fine grained, detrital grains; feldspar (55%), quartz (30%), amphibole (10%), rock fragments (5%), no observable porosity, severely compacted, hematite cement. 10390-10400 Lithic arkose, fine grained, detrital grains; quartz (35%), feldspar (30%), rock fragments (20%), biotite (5%), calcite (5%), amphibole (5%), no observable porosity, severely compacted. 12 10440-10450 Lithic arkose, very fi ne to medium grained, detrital grains; feldspar (25%), rock fragments (20%), quartz (40%), biotite (5%), calcite (5%), amphibole (5%), no observable porosity, severely compacted, sericite matrix, feldspars altered, albite fracture filling. 10460-10470 Arkose, very fine to medium grained, detrital grains; feldspar (45%), quartz (20%), amphibole (15%), biotite (5%), rock fragments (5%), no observable porosity, severely compacted, feldspars altered, biotite altered to chlorite. 10470-10480 Arkose, very fine grained, detrital grains; feldspar (65%), quartz (20%), amphibole (10%), rock fragments (5%), no observable porosity, severely compacted, feldspars altered, chlorite cement. 13 11000-11010 Arkose, fine to medium grained, detrital grains; feldspar (80%), quartz (20%), calcite (5%), rock fragments (5%), no observable porosity, severely compacted, feldspar severely altered, brown opaque material infilling pores. 11100-11110 Arkose, fine grained, detrital grains; feldspar (30%), quartz (50%), biotite (5%), amphibole (5%), calcite (5%), rock fragments (5%), no observable porosity, severely compacted. 11240-11243 Arkose, fine grained, detrital grains; feldspar (50%), quartz (25%), calcite (10%), amphibole (5%), biotite (5%), rock fragments (5%), no observable porosity, severely compacted, feldspar severely altered, brown opaque material replacing calcite. Pan Am David River No. 1-A THIN SECTION PETROGRAPHY 2240-2270 Litharenite, very coarse grained, detrital grains; volcanic rock fragments, quartz, friable, uncompacted, chlorite rims on grains. volcanic glass, plagioclase, 4620-4650 Feldspathic litharenite, fine grained, detrital grains; volcanic rock fragments (30%), altered plagioclase (30%), monocrystalline and polycrystalline quartz' (20%), carbonate matrix (20%), porosity less than 1%, secondary, severely compacted plagioclase altered to kaolinite. 4650-4680 Litharenite, very coarse grained, detrital grains; volcanic rock fragments, plagioclase, porosity undetermined, uncompacted, volcanic glass, quartz, plagioclase replaced by calcite, smectite rims, calcite cement. 4970-4990 Lithic arkose, coarse grained, detrital grains; quartz (50%), feldspar (30%), rock fragments (10%), no observable porosity, severely compacted, 25% of feldspars were altered to kaolinite and calcite, zeolite in fibrous bundles. 5890-5920 Feldspathic litharenite, fine grained,~ detrital grains; quartz (30%), volcanic rock fragments (30%), feldspar (20%), chert (10%), volcanic glass (10%), no observable porosity, severely compacted, chlorite and calcite cement, plagioclase altered to kaolinite. 6750-6760 Litharenite, very fine grained, detrital grains; volcanic rock fragments (40%), quartz (20%), feldspar (20%), volcanic glass (10%), biotite (5%), opaque material (5%), no observable porosity, severely compacted, plagioclase altered. 6770-6780 Feldspathic litharenite, very coarse grained, detrital grains; quartz, feldspar, volcanic rock fragments, volcanic glass, no observable porosity, severely compacted, smectite rims on grains, carbonate cement. 6780-6790 Litharenite, very fine grained, detrital grains; volcanic rock fragments (45%), quartz (20%), volcanic glass (15%), feldspar (10%), biotite (5%), opaques (5%), no observable porosity, · severel~ compacted, feldspars altered, opaque mineral occurs as streaks through the rock and as discrete grains, smectite and calcite cement. 6850-~860 Feldspathic litharenite, fine grained, detrital grains; quartz (30%), feldspar (30%), volcanic rock fragments (30%), volcanic glass (10%), no observable porosity, severely compacted, chlorite cement. 6860-6890 Lithic arkose, coarse to very coarse grained, detrital grains; monocrystalline and polycrystalline quartz (30%), feldspar (25%), calcite (20%), rock fragments (15%), volcanic glass (5%), opaques (5%), no observable porosity, severely compacted plagioclase altered. 6890-6920 Litharenite, coarse grained, detrital grains; volcanic rock fragments (45%), volcanic glass (20%), quartz (20%), feldspar (10%), calcite (5%), no observable porosity, severely compacted, zeolite replacement of volcanic rock fragment, calcite cement. 6940-6970 Feldspathic litharenite, medium to very coarse grained, detrital grains; volcanic rock fragments (45%), polycrystalline and monocrystalline quartz (30%), feldspar (15%), volcanic glass (5%), calcite (5%), no observeable porosity, severely compacted, micritic calcite cement. 7070-7160 Litharenite, coarse grained, detrital grains; volcanic rock fragments (45%), volcanic glass (15%), quartz (15%), chert (15%), feldspar (5%), no observable porosity, severely compacted, carbonate cement. 7220-7250 Litharenite, fine grained, detrital grains; volcanic rock fragments (60%), quartz (20%), volcanic glass (10%), feldspar (10%), no observable porosity, severely compacted, lithic clast altered to zeolite. 7250-7280 Litharenite, medium to coarse grained, detrital grains; metamorphic and volcanic rock fragments (45%), m'onocrystalline and polycrystalline quartz (20%), feldspar (15%), calcite (10%), volcanic glass (10%), no observable porosity, severely compacted, feldspars severely altered, calcite cement. 7280-7310 Lithic arkose, medium grained, detrital grains; feldspar (40%), quartz (30%), rock fragments (20%), biotite (10%), no observable porosity, severely compacted, calcite and kaolinite cement. 7310-7340 Lithic arkose, medium grained to granular, detrital grains; feldspar (30%), quartz (30%), rock fragments (20%), volcanic glass (10%), calcite (10%), no observable porosity, severely compacted, calcite cement. 7340-7370 Feldspathic litharenite, medium grained, detri~al grains; rock fragments (40%), feldspar (20%), monocrystalline and polycrystalline quartz (20%), volcanic glass (10%), chert (10%), no observable porosity, severely compacted, feldspar severely altered, calcite and smectite cement. 7400-7430 Feldspathic litharenite, fine to medium grained, detrital grains; rock fragments (40%), feldspar (30%), quartz (25%), volcanic glass (5%), no observable porosity, severely compacted, carbonate cement. 7430-7460 Litharenite, very fine grained, detrital grains; rock fragments (40%), quartz (40%), volcanic glass (10%), feldspar (10%), no observable porosity, severely compacted, brown opaque cement. 7460-7490 Lithic arkose, fine to medium grained, detrital grains; feldspar (40%), rock fragments (30%), quartz (20%), volcanic glass (10%), no observable porosity, severely compacted, smecti te cement. 7490-7500 Feldspathic l itharenite, fine to medium grained, detrital grains; rock fragments (35%), quartz (25%), feldspar (35%), volcanic glass (5%), no observable porosity, severely compacted, feldspar replaced by calcite and kaolinite, smecti te cement. 7840-7860 Feldspathic litharenite, medium to coarse sand, detrital grains; rock fragments (25%), quartz (40%), feldspar (30%), volcanic glass (5%), no observable porosity, severely compacted, feldspars replaced by calcite. 7990-8000 Litharenite, coarse to very coarse grained, detrital grains; monocrystalline and polycrystalline quartz (40%), rock fragments (20%), feldspar (10%), calcite (10%), volcanic glass (5%), mica (5%), no observable porosity, severely compacted, feldspar replaced by calcite, smecti te cement. 10680-10690 Litharenite, coarse grained, detrital grains; rock fragments volcanic glass (10%), no observable porosity, severely compacted, chlorite and sericite cement, feldspars altered. (40%), quartz (30%), feldspar (20%), 11640-11670 Lithic arkose, medium to coarse detrital grains; feldspar (40%), volcanic glass (10%), no observable porosity, severely compacted, smectite and chlorite cement, some of the feldspars altered to grai ned, rock fragments calcite. (3o%), qua rtz (20%), 11670-11700 Feldspathic litharenite, coarse detrital grains; rock fragments unidentified black opaque (5~), no observable porosity, severely compacted, feldspars altered. grained, (35%), feldspar mineral, ? pyrite (35%), (10%), quartz (15%), volcanic glass 10 11700-11710 Lithic arkose, medium to coarse grained, detrital grains; feldspar (50%), rock fragments (30%), quartz (20%), minor volcanic glass, porosity less than 1%, fracture, severely compacted, chl ori te cement, fractures partly filled by calcite. 11740-11750 Lithic arkose, very fine grained, detrital grains; feldspar (50%), rock fragments (30%), quartz (20%), no observable porosity, severely compacted, feldspars altered to kaolinite and calcite, fractures filled with micro quartz and calcite. 12120-12130 Lithic arkose, very fine grained, detrital grains; feldspar (50%), rock fragments (35%), quartz (15%), no observable porosity, severely compacted, feldspars severely altered, fractures filled with laumontite and calcite. 12210-12220 Arkose, coarse grained, 11 detrital grains; feldspar (60%), quartz (20%), rock fragments (20%), no observable porosity, severely compacted, chlorite cement. 12370-12390 Litharenite, fine to coarse grained, detrital grains; volcanic rock fragments (75%), feldspar (15%), quartz (10%), no observable porosity, severely compacted, fractures filled with quartz, calcite and laumontite, volcanic rock fragments replaced by natrolite. 12690-12700 Arkose, medium to very coarse grained, detrital grains; feldspar (60%), quartz (30%), rock fragments (10%), porosity less than 1%, fracture, severely compacted, chlorite and calcite cement, chlorite replacement of volcanic rock fragments. 12870-'12880 Arkose, coarse to very coarse grained, detrital grains; feldspar (60%), quartz (30%), rock fragments (10%), no observable porosity, severely compacted, 12 chlorite cement, chlorite replacement of detrital grains, 50% of feldspars altered. 13340-13360 Feldspathic litharenite, fine to very fine grained, detrital grains; rock fragments (60%), feldspar (30%), quartz (10%), no observable porosity, severely compacted, all of the rock fragments replaced by chlorite, chlorite cement, fractures filled with laumontite. 13360-13370 - Feldspathic litharenite, very fine grained, detrital grains; rock fragments (60%), feldspar (25%), quartz (10%), unidentified black opaque material (5%), no observable porosity, severely compacted, all of the rock fragments replaced by chlorite, fractures filled wi th laumontite and calcite. 13480-13490 Arkose, coarse grained, detrital grains; feldspar (60%), quartz (30%), chlorite (10%), no observable porosity, severely compacted, rock fragments replaced by chlorite, chlorite cement, feldspars altered and replaced by calcite. 13670-13700 Lithic arkose, medium to very coarse grained, detrital grains; feldspar (50%), quartz (10%), matrix (40%), porosity less than 1%, fracture, severely compacted, matrix consist of chlorite and deformed rock fragments.