JERVOIS MINING NL    -    DRILLHOLE LOG															

DRILLHOLE:     ST03  					Logged by:     J.G.Purvis					Date:   18.2.00   		Depth:    36.4m  		Size:     NTW     	

					Co-ords:    5 405687N / 419125E    					RL:     686.5m     		Dip:     - 90          		Azimuth:    	

DRILL ADVANCE					LITHOLOGY										

From	To	Interval	Recovered	Lost	From	To	DESCRIPTION			ALTERATION		STRUCTURE		MINERALIZATION	

0	1.9	1.9	0.25	1.65	0	5.3	PARTLY-OXIDIZED TERTIARY BASALT.			Oxidized.		Badly broken.			

1.9	3.4	1.5	1.4	0.1			Orange-brown clay after oxidized basalt with 			Several white veinlets		Basal contact broken.			

3.4	3.7	0.3	0.3	0			kernels of unox grey weakly-magnetic basalt.			to 5mm (zeolite?).					

3.7	4.9	1.2	1.2	0											

4.9	6	1.1	0.7	0.4	5.3	6.1	CLAY & IRON-CEMENTED SAND (TERTIARY).			Oxidized.		Bedding 75/LCA.			

6	7.5	1.5	0.05	1.45			"Upper half soft yellow sandy clay, lower half"								

7.5	9.4	1.9	0	1.9			qtz sand cemented by hard lateritic iron oxide. 								

9.4	10.9	1.5	0.7	0.8											

10.9	12.4	1.5	0.15	1.35	6.1	13	LOOSE QUARTZ SAND (TERTIARY).								

12.4	13.9	1.5	0.15	1.35			Fine to very coarse gr white running qtz sand.								

13.9	15.4	1.5	0.25	1.25			Grainsize increases with depth.     A few 								

15.4	16.4	1	0.35	0.65			Ordovician qtz sst fragments below 11m.								

16.4	16.9	0.5	0.4	0.1											

16.9	18.4	1.5	0.3	1.2	13	15.4	CLAYEY SAND (TERTIARY).			Oxidized.					

18.4	18.8	0.4	0.25	0.15			Yellow soft clayey qtzose sand.   Some layers								

18.8	19.4	0.6	0.3	0.3			Feox-cemented.   Frags of qtz & qtz sst.								

19.4	19.9	0.5	0.5	0											

19.9	21.4	1.5	1.5	0	15.4	17.2	SILICEOUS BRECCIO-CONGLOMERATE			Stongly silicified.				Minor limonite & pyrite in matrix.	

21.4	22.9	1.5	1.5	0			"(TERTIARY ""GREY BILLY"")."			Partly oxidized &					

22.9	24.4	1.5	1.5	0			"White, very hard.   Angular to rounded clasts to"			leached.					

24.4	25.9	1.5	1.5	0			"10cm of qtz & qtz sst, in silif qtz sand matrix."								

25.9	27.4	1.5	1.5	0											

27.4	28.9	1.5	1.5	0	17.2	36.4	QUARTZOSE SANDSTONE.			Mildly oxidized to 24m		Sl clayey & badly broken		Minor to locally 2% py>sp-gn	

28.9	30.4	1.5	1.5	0			"Grey, hard.   Medium to coarse gr massive"			then weakly ox to EOH.		to 19.4m.   Below 19.4m		"(mainly as fi gr dissem), except:"	

30.4	31.9	1.5	1.5	0			qtzose sandstone & quartz sandstone.			Weak biotite-chlorite alt		"mildly fractured & broken,"		"26-28.3m:  nil sulphides, &"	

31.9	33.4	1.5	1.5	0			Common probable worm burrows in places			"(bio moderate 24-29m,"		esp along strong set of		"31.5-35.5m: 2-3% py, rare sp-gn,"	

33.4	34.9	1.5	1.5	0			"(eg: 22.4m), always near-parallel LCA."			& chlor best around qtz-		qtz-chlor-lim(+-py) veins		in zone of qtz-ser alt.	

34.9	36.4	1.5	1.5	0						chlor veins: these post-		10/LCA (to 1cm thick at		Limonite stains & bxwks on fracts	

										date bio).   Patchy silica-		22.7m).		esp above 24m & 32.5-35.5m.	

										sericite alt in qtz sst 					

							END  OF  HOLE								

															

															









































































															

