Batu Hitam » Robust Resources

$1.255 ROL.ASX

18/03/2012 4:01 am

Batu Hitam

Romang Island

Lakuwahi Project

Batu Mas

Batu Hitam

Batu Jagung

North Romang Project

Wyaru

Kiahar

Philippines


	Maiden JORC Code compliant Resources Estimate from Lakuwahi. Read more


	Exploration Drilling Significantly Expands Mineralisation at Batu Hitam Prospect where over 90% of holes intersected potentially economic mineralised rock. Read more


	206 METRES of Continuous Precious and Base Metal-Rich Mineralisation Drilled on the North-Eastern Extensions of Batu Mas, Romang Island Indonesia. Read more

At the Batu Hitam Prospect (meaning Black Rock in Bahasa Indonesian), Robust has drilled 77 drill holes for 9,250 metres at July 2011 with a strike length of over 400m open in 3 directions. To date 90% of all holes have intersected potentially economic precious and base metal mineralisation.

Drilling at Batu Hitam continues with three owner operated rig on site targeting the follow up of the excellent intersection of 52 mts @ 1.57 g/t AU equivalent and 36 mts @ 3% combined Cu/Pb/Zn including 10 mts @ 4.65 combined CU/Pb/Zn at Hole LWD 042. In addition, Hole LWD 066 intersected altered and brecciated volcanic rocks for the entire length ending in mineralisation at 120 mts averaging 1.9% combined Cu/Pb/ZN.

Batu Hitam Gold-Silver Distribution	Batu Hitam Drill Section

Base metals at Batu Hitam represent an emerging opportunity with composite samples of various grades currently being tested metallurgically. Initial investigation suggests that mining would appear to be relatively easy and low-cost due to the soft rock and as the base metals are directly below the gold-silver mineralisation.

IP Resistivity Survey
IP Resistivity Survey results over the main area of Batu Hitam have been received are providing Robust will significant guidance for further drilling.

Batu Hitam Base Metals Distribution	Lakuwahi IP-Resistivity survey

Show Batu Hitam Drill Results >>>

Batu Hitam Drill Results(hide>>>)

Hole #	From (m)	To (m)	Au Equiv (g/t)	Ag (g/t)	Cu (%)	Pb (%)	Zn (%)
LWD026	0	72.25	2.44	.0	N/A	N/A	N/A
	0	49.75	3.93	25.0	N/A	N/A	N/A
LWD027	0	50.3	2.37	65.95	N/A	N/A	N/A
	1	18.25	3.12	.0	N/A	N/A	N/A
	2.2	13.2	2.54	.0	N/A	N/A	N/A
	22.25	26.35	2.48	500.25	N/A	N/A	N/A
LWD028	0	47.2	4.38	31.0	N/A	.32	N/A
	3	32.2	.55	21.0	N/A	.16	N/A
	5.2	10.2	2.44	46.0	N/A	.34	N/A
LWD029	11.5	19.7	2.41	39.0	.01	N/A	N/A
LWD030	0	23.2	.56	25.13	.02	N/A	N/A
	27.2	31.2	6.78	9.5	1.11	N/A	N/A
LWD031	14.75	46.75	9.36	27.26	.13	N/A	N/A
	73.75	75.75	4.87	97.5	1.1	N/A	N/A
	80.75	82.65	6.93	50.32	.12	N/A	N/A
LWD032	1.5	26.4	5.61	17.87	.15	N/A	N/A
	65.85	68.85	1.5	19.67	.95	N/A	N/A
LWD033	17.2	36.7	2.92	6.65	N/A	.39	.88
	20.15	21.1	4.74	18.0	.26	.95	2.67
	41.7	68.7	.29	1.63	N/A	.48	.75
LWD034	26.7	41.7	.45	4.8	.16	.5	1.09
	35.7	36.7	1.0	22.0	1.13	2.6	1.51
	38.7	39.7	.21	8.0	.1	1.35	4.03
LWD035	0	46	.65	22.0	N/A	.46	.22
	26	27	1.59	21.0	N/A	N/A	N/A
	31	33	3.07	150.0	.81	N/A	N/A
	44	45	3.72	89.0	.32	3.09	2.44
LWD036	0	9.2	.99	157.35	.13	1.31	.18
	0	4.7	1.48	291.0	N/A	2.44	.07
	3.2	4.7	.53	851.0	.2	5.4	.09
LWD037			1.3	N/A	N/A	N/A	N/A
LWD038	0	5.4	.46	N/A	N/A	1.21	.43
	72.4	73.4	.24	N/A	N/A	.74	1.76
LWD039	2.35	27.35	1.03	22.3	.23	.17	.17
	2.35	15.35	1.73	5.38	N/A	N/A	N/A
	23.35	24.35	.31	15.0	4.66	.01	1.13
LWD040	5	29.5	.74	50.2	N/A	N/A	N/A
	5	11	1.15	25.17	N/A	N/A	N/A
	18	27.5	.53	89.16	N/A	N/A	N/A
LWD041	12	14	1.89	7.5	N/A	N/A	N/A
	24.5	25.5	1.18	47.0	.71	N/A	N/A
	36.5	39.5	.45	9.0	.13	.7	.8
LWD042	3	55	.39	27.0	N/A	.72	.62
	3	21	1.71	12.0	N/A	N/A	N/A
	3	11	3.18	3.0	N/A	N/A	N/A
	33	69	3.39	28.5	.15	1.26	1.62
	48	58	1.01	36.0	.17	1.7	2.7
LWD043			1.19	N/A	N/A	N/A	N/A
LWD044	26	57.5	3.83	39.0	N/A	N/A	N/A
LWD045	26.5	63.5	5.76	45.0	N/A	N/A	N/A
LWD047	7.5	11	4.47	20.0	N/A	N/A	N/A
	31.5	60.5	1.35	29.0	.1	.46	.58
	51.5	74.5	1.54	20.0	.08	.6	1.36
LWD050	8	39	.12	77.0	N/A	.56	N/A
LWD052			5.13	N/A	N/A	N/A	N/A
LWD053	6.5	8.5	11.97	N/A	N/A	.61	N/A
	16.5	18.5	3.76	8.0	N/A	N/A	N/A
	48.5	49.5	2.43	13.0	.31	1.24	.81
	75.5	76.5	.46	41.0	.89	4.39	9.59
LWD056	8	37	1.11	22.0	.12	.3	N/A
	8	19	1.46	26.0	N/A	.51	N/A
	5	7	N/A	N/A	.01	4.75	.15
LWD059	3	7.5	.46	.0	.08	1.96	.74
	19	20	6.94	413.0	.13	.01	.0
	50.5	68.5	.6	19.0	.11	.7	2.03
	56.5	64.5	.78	28.0	.16	1.02	2.74
LWD063	0	3.2	.51	.0	.17	4.57	.32
	8	17.5	1.72	75.0	N/A	N/A	N/A
	19.5	91.5	.51	17.0	.12	.57	1.32
	31.5	57.5	.6	21.0	.14	.78	2.16
	41.5	50.5	.84	33.0	.29	1.13	2.92
LWD066	0	3.5	.29	1.43	.09	1.4	.27
	8.5	20.5	1.79	81.33	N/A	N/A	N/A
	31.5	106	.46	14.69	.13	.89	1.61
	31.5	43.5	.73	30.74	.15	1.09	2.19
	101.85	104	1.32	55.23	1.75	7.3	12.84
LWD067	0	1	N/A	N/A	.08	3.86	.07
	55.5	110	.47	14.14	.09	.78	1.11
LWD070	21	69	1.2	33.86	N/A	N/A	N/A
	26	41	1.36	20.87	N/A	N/A	N/A
	62	136	.78	28.76	.11	.76	.72
	103	118	.68	20.27	.09	.89	1.53
LWD073			N/A	N/A	N/A	N/A	N/A
LWD077	1	9	.84	20.38	N/A	N/A	N/A
	77	82	.39	2.6	.06	.85	1.08
	104	106	.39	4.5	.29	1.63	.8
LWD080	20	22	1.18	46.0	N/A	N/A	N/A
	0	12	.14	1.0	.09	1.44	.33
	52	116	.38	13.89	.11	.79	.73
	57	59	1.22	55.0	.51	2.03	2.28
	76	85	.52	18.78	.08	1.47	1.19
LWD082	0	115	.18	5.47	.05	.78	.63
	21	33	.05	1.45	.15	3.76	1.09
	23.7	28.5	.08	3.63	.26	6.31	1.57
	96	98	1.57	10.5	.03	1.09	.64
LWD085	0	188	.19	3.35	.06	.51	.5
	22	29	.06	.0	.19	3.35	2.53
	78	91	.38	12.46	.1	.69	1.34
	133	136	2.24	58.0	1.13	7.67	12.33

Notes:The information in this announcement that relates to Exploration Results, Mineral Resources or Ore Reserves is based on complied by John Levings BSc, who is a Member of The Australasian Institute of Mining and Metallurgy and who has more than ten years experience in the field of activity being reported on. Mr Levings is a director of the Company. Mr Levings has sufficient experience, which is relevant to the style of mineralisation and type of deposit under consideration and to the activity, which he is undertaking to qualify as a Competent Person as defined in the 2004 Edition of ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Levings consents to the inclusion in the announcement of the matters based on his information in the form and context in which it appears. 1 All thicknesses are down-hole drilled thicknesses. 2 Au Equivalent (Gold Equivalent) = gold assay + (silver assay / 60) where the number 60 represents the ratio where 60 g/t Ag = 1g/t Au. This ratio was calculated from the fifteen year average prices of gold and silver prices from January 1995 to 30 December 2010 World Bank Commodity Price Data (average Gold price is USD $515.98 per Troy Ounce and average Silver price is USD $8.58 per Troy Ounce). Metallurgical test results previously reported have indicated high extraction rates (94%-95%) for both gold and silver using standard technology. 3 Cu Equivalent (Copper Equivalent) = [(copper assay x copper price x 22.05) + (gold assay x gold price/31.1) + (silver assay x silver price/31.1) + (zinc assay x zinc price x 22.05) + (lead assay x lead price x 22.05)] / (copper price x 22.05). The metal prices used in this copper equivalent calculation were taken from the average of the 12 months from January to December 2010 taken from published World Bank Commodity Price Data. The metal prices thus used in the calculation are: Copper: USD $3.42 per pound, gold: USD $1,224.66 per Troy ounce, silver USD $20.20 per Troy ounce, Lead USD $0.9745 per pound and Zinc USD $0.9801 per pound. Preliminary metallurgical test results previously reported (30th November 2010) indicate high and broadly equivalent flotation recoveries for all metals used in the copper equivalent calculation (gold recoveries average 84.3%, silver 93.0%, zinc 97.2%, lead 91.1% and copper 94.6%).

Hide Batu Hitam Drill Results >>>

Email alerts

Whether you’re a shareholder or not you can subscribe to receive all company announcements through our Email Alerts service.