Tybo
Hopefully this commentary on the lithologies for DDH02 & DDH03 may assist. I haven't included DDH01 as it did not intersect any volcanics.DrillholeDDH002
171.67 –179.00 : Meta Sed?. Brown. Altered? Heavily fractured throughout. Grain sizefrom fine to medium. Sporadic pyrite and chalcopyrite throughout. Rarecalcite veins. Altered. Graded bedding. Occasional soft green mineral inmatrix. Moderately strong. ~55-75 TCPS (rare 90 TCPS). 0-100SI.
179.00 –179.98 : Meta Sed? Brown. Altered? Quartz common throughout. Calcite crystalsin fractures. Hematitic throughout. Medium to large grain size. Graded bedding.Strong rock. ~60-80 TCPS. 0SI.
179.98 –184.32 : Meta Sed? Brown. Altered? Core heavily fractured/broken. Very finegrained. Soft green mineral in some defects. Looks Hematitic throughout. Someareas of core brecciated, possible fault zone? Rare calcite veins. Occasionalslickensides. Abrupt contact with overlying unit. Moderately strong.~70-90TCPS. 0-100SI.
184.32 –192.06 : Meta Sed? Brown/red. Altered? Medium grained. Common quartz. Rarepyrite and chalcopyrite. Sericite noted. Rare chlorite or epidote? Veiningmay indicate slight metamorphism. Unit contains larger angular quartz grains inparts (photo DDH002 graded bedding) Turbidite sequence? Moderately strong.~75-95 TCPS. 40-200SI. Average = 100SI.
192.06 –196.47 : Meta Sed? Altered? Brown/red. Fine to medium grained. Quartz abundant.Rare sericite. Veining indicates possible metamorphism. Looks Hematiticthroughout. Graded bedding. Rare pyrite and chalcopyrite. Abruptinterbed contacts (Turbidite?). Strong rock. ~65-85 TCPS. 0-100SI.
196.47 –201.00 : Meta Sed? Altered? Brown/red. Graded bedding, Turbidite?. Medium-largeto medium grained. Rare green mineral in areas. Looks Hematitic throughoutmatrix. Small 4cm size area of rock grey colour, possibly indicating unalteredzone. Strong rock. ~70-90 TCPS. 0-500SI. Average 0-100SI.
201.00 –246.60 : Meta Sed? Altered? Turbidite? Brown/red. Ranges from very fine grainedto medium grained sections throughout unit. Veining and very slight grain foliationsmay indicate slight metamorphism. Graded bedding throughout. Some interbedshave very abrupt boundaries. No other sedimentary structures seen. Small<4cm grayish zones in rock may indicate less altered areas than thered/brown zones. Quartz veins sporadic but common throughout. Rare muscovite.Hematitic throughout. Red iron rich mineral (hematite?) concentrates as defectinfills. Rare soft green mineral (chlorite, epidote, Celadonite?) in matrix.Very fine-grained bands clay. Fine grained areas seem to contain a higherproportion of green mineral than the larger grained areas. Sporadic brecciatedzones. Larger veins show host rock fragments as inclusions in vein. ~70-90TCPS. Rare 100 TCPS. Average = 85 TCPS. 0-20SI
171.67-246.60mmoderately dipping (~30-40º), non-magnetic Proterozoic basement generally fineto medium-grained “red-bed” sediments.
END BOREHOLEAT 246.60m DEPTH.
DrillholeDDH003
164.33 –190.72 : Meta Sed? Red/brown. Altered? Very fine grained. Core extremelyfractured/broken. Rare calcite veining. Haematitic throughout. Haematite richveining. Very small quartz grains noted. Small amount of green mineral(chlorite ?) noted in some defects. Brecciated areas (fault zones ?) present.Quartz veining in areas. Moderate strength. ~70-85 TCPS. ~100SI.
190.72 –207.15 : Meta Sed? Red/brown. Altered? Grain size ranges from fine to medium.Quartz grains present. Haematitic throughout, (iron rich mineral givingred/brown colour). Rare soft green mineral (epidote? chlorite?) seen in matrixand as rare infill‟s in defects. Rare muscovite (sericite?). Iron rich mineral(haematite?) common in defects and veins. Rock is heavily fractured. Brecciatedareas may indicate fault zone intersections. Rare calcite crystals infractures. No HCL reaction overall. Strong rock. ~75-95 TCPS. Up to 100 SI.Average 80 SI.
207.15 – 208.13 :Meta Sed Breccia? Red/brown. Altered? Heavily brecciated unit. Possible fault zone intersection. Heavily fractured with chlorite? infill. Moderately weak. ~65-90 TCPS. 0SI.
208.13 –255.40 :Meta Sed? Red/brown. Altered? Grain size ranges from very fine tomedium. Small brecciated areas throughout (5cm wide fault intersects). Abundantfine quartz grains throughout. Chlorite? in fractures and occasionally inmatrix. Common micro-faulting/jointing. Iron rich mineral throughout(haematite). Heavily veined. Strong rock. ~75-95 TCPS. Up to 130 SI.
255.40 –264.80 :Meta Sed? Brown/red. Altered? Similar to above unit, but also. Commonquartz veins and quartzose throughout. Green mineral (chlorite?) common asdefect infill. Highly Haematitic throughout. Rare calcite veins. Chalcopyritein areas. Strong rock. ~80-100 TCPS. Up to 200 SI. Average = 80 SI.
264.80 –270.40 :Meta Sed?. Grey/red/brown/green. Altered? Fine grained. Crystalline nature.Black grains throughout (deformed micas ?) Quartz throughout (red/orangecolour). Rare quartz veining (black and white colour). Common calcite veins.Green mineral (chlorite ?) infilling defects and reacts with HCL. Commonjointing and occasional brecciated areas. Very rare chalcopyrite. Strongrock. ~70-90 TCPS. (rare 95 TCPS). 0 – 20 SI.
Key take aways for me are that they have intersected highly brecciated zones that then lead into the start of mineralisation.
I think these historic drill holes may have stopped just short of the money.
