Fifteen Porphyry Cu-Au Drill Targets Identified Within Southern Arc's Selodong Prospect
Vancouver, B.C.: Southern Arc Minerals Inc. (TSX Venture: SA) is pleased to announce that detailed geological mapping, geochemical sampling, scout drilling and newly completed studies by independent geophysical consultants, have defined 15 porphyry Cu-Au drill target areas within SA's Selodong Intrusive Complex (SIC). The Selodong Intrusive Complex covering an area of approximately 7 by 3 kilometres, is situated at the southern end of a 13 km long, northwest trending structural corridor of mineralization and alteration on SA's Lombok property.
Since April 2007, SA has completed four drill holes (SLD001 to SLD004) totaling 2,242.5 metres in the SIC area, with the fifth, SLD005 currently in progress. These holes have tested two of the 15 porphyry Cu-Au targets and all have intersected broad zones (363.5 to 442.2 metres) of significant Cu-Au mineralization. Within these intervals significant widths of high grade Cu-Au values were intersected and as such the SIC porphyry system would be classified in the "Gold-Rich" category of porphyry Cu mineralization. Details of holes drilled by SA in the SIC area are detailed in Table 1 below:
Table 1: Southern Arc SIC Drilling Intercepts
Hole |
UTM Coord. |
Elev. (m) |
Azi. (deg) |
Incl. (deg) |
Depth (m) |
Significant Drill Intersection |
|
Easting |
Northing |
||||||
SLD001 |
390950 |
9021167 |
130.9 |
045º |
-65º |
476.0 |
442.2 m at 0.28% Cu / 0.42 g/t Au from 33.8 m (incl. 105.0 m at 0.60% Cu / 1.04 g/t Au from 33.8 m) |
SLD002 |
391049 |
9021236 |
150.3 |
225º |
-60º |
518.0 |
384.65 m at 0.30% Cu / 0.40 g/t Au from 18.1 m (incl. 117.2 m at 0.56% Cu / 0.80 g/t Au from 118.7 m |
SLD003 |
390869 |
9021117 |
149.8 |
090º |
-60º |
643.5 |
363.5 m at 0.30% Cu / 0.51 g/t Au from 33.3 m (incl. 250.1 m at 0.35% Cu / 0.64 g/t Au from 33.3 m) |
SLD004 |
391158 |
9022027 |
78.3 |
220º |
-65º |
605.0 |
407.25 m at 0.25% Cu / 0.45 g/t Au from 160.25 m (incl. 192.25 m at 0.36% Cu / 0.74 g/t Au from 160.25 m) |
SLD005 |
391017 |
9021886 |
95.7 |
090º |
-65º |
Hole in progress. |
Due to the strong spatial correlation of elevated Cu-Au grades and secondary magnetite alteration recognized in drill holes, SA has commissioned geophysical consultants GRS of Brisbane, Australia to undertake modeling of ground magnetic data from the SIC area. Preliminary images from 3D geological/geomagnetic models by GRS confirm the potential for significant depth and size of the 15 targets.
These 15 distinct porphyry Cu-Au drill targets are located over an aerial extent in excess of 20 square kilometers. They show coincident magnetic highs associated with secondary magnetite alteration, elevated surface Cu-Au-Mo geochemistry and associated intense fracturing and vein stockworks typical of porphyry Cu-Au deposits. Six of these targets were scout drilled by the previous operator Newmont and this drilling has confirmed the model. The remaining nine target areas have yet to be drill tested. Details of each of these drill targets are shown in Table 2, whilst locations are shown in Figure 1.
Based on the encouraging drilling results to date and the large number of porphyry Cu-Au drill targets as detailed in Table 2, Management intends to drill test each target to better understand the geometry, grade, and size potential with the objective of prioritizing the targets for future work.
Table 2: Selodong Intrusive Complex Porphyry Cu-Au Drill Targets
Anomaly |
Geology |
Geophysics |
Surface Geochemistry |
Mineralized Drill Intercepts (Cu in %, Au in g/t) |
||||||||
3D Mag |
IP |
Soil |
Rock |
Cu |
Au |
Mo |
||||||
Mod |
High |
Mod |
High |
|||||||||
Montong Botek |
Magnetite altered diorite + quartz stockworks centred on N & NE structure. |
ü |
ü |
ü |
ü |
ü |
ü |
ü |
- 18 shallow drill holes max. depth 155.5 m. - 4 deep drill holes (3 by SA) to max. depth 643.5 m. - Intercepts from 14 to 442.2 m, with ranges of 0.21-0.6 Cu & 0.24-1.04 Au. - Best interval: 442.2 m @ 0.28 Cu & 0.42 Au (incl. 105.0 m @ 0.6 Cu & 1.04 Au) |
|||
Blongas I (BI) |
Magnetite altered diorite + quartz stockworks centred on N & NE structure. |
ü |
ü |
ü |
ü |
ü |
ü |
ü |
- 4 shallow drill holes, max. depth 129.9m. - 1 deep drill hole depth 501.2m. - Intercepts from 20.5 to 115.1m, with ranges of 0.09-0.19 Cu & 0.1-0.3 Au. - Best interval: 115.1m @ 0.14 Cu & 0.24 Au. |
|||
Blongas II (BII) |
Magnetite altered diorite + quartz stockworks centred on N & NE structure. |
ü |
ü |
ü |
ü |
ü |
ü |
-10 shallow drill holes max. depth 150m. - 3 deep holes (1 by SA) to max. depth 605m. - Intercepts from 40.4 to 407.25m with ranges of 0.19-0.5 Cu and 0.25-1.05 Au. - Best interval: 407.25m @ 0.25 Cu & 0.45 Au (incl. 102.25m @ 0.5 Cu & 1.05 Au) |
||||
Blongas III (BIII) |
Magnetic anomaly covered by alluvium diorite and quartz stockworks are mapped peripherally. |
ü |
ü |
ü |
ü |
ü |
ü |
Not yet drill tested |
||||
Belikat-Mahoni |
Zones of quartz stockworks in altered diorite centered on a complex structural zone at the margin of a regional circular feature. |
ü |
ü |
ü |
ü |
ü |
ü |
ü |
- 4 shallow drill holes, max. depth of 150.8m. - Intercepts from 19.7 to 72.6m, with ranges from 0.05-0.1 Cu & 0.18-0.42 Au. - Best interval: 67.6m @ 0.1 Cu & 0.21 Au, the last 2 samples of this hole gave 7.6m @ 0.13 Cu & 0.38 Au. |
|||
Kekalik |
3 areas of quartz stockworks in altered diorite centered on a local circular feature with N & NE structural intersects. |
ü |
ü |
ü |
ü |
ü |
ü |
ü |
- 3 historic drill holes, maximum depth of 150.2m. - Intercepts from 17.3 to 72.1m with ranges from 0.03-0.13 Cu & 0.13-0.27 Au. - Best interval: 72.1m @ 0.13 Cu & 0.25 Au. |
|||
KK2 |
Magnetite altered diorite + quartz stockworks centered on NE & NW structure. |
ü |
ü |
ü |
ü |
ü |
ü |
Not yet drill tested |
||||
KK3 |
Magnetite altered diorite + quartz stockworks centered on NE & NW structure. |
ü |
ü |
ü |
ü |
ü |
ü |
Not yet drill tested |
||||
Kedaro |
Magnetite altered diorite + quartz stockworks centered on N & NW structure intersection. |
ü |
ü |
ü |
ü |
ü |
ü |
ü |
Not yet drill tested |
|||
KD2 |
Magnetite altered diorite + quartz stockworks centered on NE & NW structure. |
ü |
ü |
ü |
ü |
ü |
ü |
Not yet drill tested |
||||
KD3 |
Quartz stockworks hosted in porphyry intrusives centered on N & NW structure intersection. |
ü |
ü |
ü |
ü |
ü |
ü |
Not yet drill tested |
||||
KD4 |
Quartz stockworks hosted in porphyry intrusives centered on N & NE structure intersection. |
ü |
ü |
ü |
ü |
ü |
ü |
Not yet drill tested |
||||
KD5 |
Zones of quartz stockworks hosted in porphyry intrusives centered on N & NE structure intersection. |
ü |
ü |
ü |
ü |
ü |
Not yet drill tested |
|||||
KD6 |
N & NE structure intersection on margin of local circular feature, target to be mapped. |
ü |
ü |
ü |
ü |
ü |
Not yet drill tested |
|||||
Lapangan Geres |
Magnetite altered diorite + quartz stockworks, mineralisation also hosted in breccia (diatreme). N & NE structure intersection on margin of regional circular feature. |
ü |
ü |
ü |
ü |
Not yet drill tested |
Qualified Person and Quality Control and Assurance
The information in this release has been compiled under the supervision of Southern Arc's Vice President of Exploration Hamish Campbell B.Sc.Geology, MAusIMM. Mr. Campbell has over 23 years of international mineral exploration experience including 21 years in Indonesia during which he has held such positions as Exploration Manager, Senior Geologist and Consulting Geologist. Mr. Campbell has sufficient experience relevant to the style of mineralization under consideration and qualifies as a Qualified Person as defined in terms of NI 43-101.
All assaying of samples was undertaken by the ITS laboratory in Jakarta. ITS is one of the world's largest product and commodity testing, inspection and certification organizations. The Jakarta laboratory is ISO 17025 accredited and employs a Laboratory Information Management System (LIMS) for sample tracking, quality control and reporting. In addition to the laboratory's quality assurance program, the Company employs its own comprehensive quality assurance/control program including blanks and standards.
On behalf of the Board of
Southern Arc Minerals Inc.
"John Proust"
President and CEO
Southern Arc Minerals Inc.
Suite 1500, Box 1078, 885 West Georgia Street, Vancouver, BC V6C 3E8 Canada
Telephone: (604) 676-5241 Fax: (604) 676-5246 Website: www.southernarcminerals.com
"The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this release"