Desk Assessment Report of Motoling Gold Prospect, South Minahasa, North Sulawesi, Indonesia

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Desk Assessment Report of Motoling Gold Prospect, South Minahasa, North Sulawesi, IndonesiaBy :

Boy Surya Adhitya, MAusIMMExecutive Summary This desk assessment of Gold Prospect in Motoling District, South Minahasa, North Sulawesi.

Map 1. Motoling Location Map Two gold mine well known in the surrounding this area such as Messel Gold Mine (PT. NMR) and Riska and Lanut Godl Poject as PT. Avocet Bolaan Mongondow known as sediment hosted gold mineralization, while Lanut as epithermal gold ( high sulphidation system).Regional Setting of North Arm of Sulawesi

References and further reading may be available for this article. To view references and further reading you must purchase this article.The north arm of Sulawesi is comparatively well mineralized. Porphyry Cu---Au mineralization in the North Sulawesi Arc is associated with clusters of small hornblende diorite or quartz diorite stocks, but the specific volcanic environment above these intrusions and their magmatic affinity remain unknown. Mineralization related to porphyry Cu---Au districts includes Cu---Au skarn, polymetallic vein and high sulphidation epithermal Au (+enargite). Porphyry Mo mineralization in the neck of Sulawesi is related to small stocks or roof apophyses of the Dondo batholith.

Map 2. Regional Setting of Norm Arm Sulawesi as Magmatic Arch as Potential for Gold Mineralization

Epithermal Au mineralization (typically quartz-calcite veins adularia) is associated mainly with the Early Miocene andesitic arc but there are important exceptions, and in general the age of mineralization is poorly known. A district-wide correlation between epithermal Au mineralization and porphyry Cu---Au mineralization is not apparent. The most important epithermal Au district (Kotamobagu) is inferred to be associated with a long-lived volcanic center represented by the Moat caldera.

In addition to high sulphidation Au mineralization related to porphyry systems, other styles and settings of Au mineralization in the north arm are exemplified by the Gunung Pani rhyolitic dome, the Patung diatreme breccia, the Mesel jasperiod, hosted partly by carbonate rocks, and sedimentary replacement Au-base metal mineralization at Doup. Diversity of mineralization in the north arm is further illustrated by VMS mineralization in volcanic basement to the Neogene arc, and by metamorphogenic quartz vein Au mineralization in the neck of Sulawesi (I. Kavalieris, Th.M. van Leeuwen and M. Wilson) South Minahasa Gold ProspectsSouth Minahasa is within North Arm Sulawesi Magmatic Arc which is Miocene Recen in age. Base on secondary data survey there are identified has prospect for Gold and Silver mineralization.Rantatotok is one of the well known as traditional gold miner area since the Dutch. Even this proven when PT NMR (Newmont Minahasa Raya) came to this area at Messel

There some other area outside of PT. NMR consesion area as well known has gold and silver mineralization as such as Sayoan, Moreah, Gelas Mountain, Limpoga and Upper Totok. These area have been released by PT. NMRLimpoga, Pasola dan Nona Hoa have been released since 2001 and been given back to the local government. In Pasolo gold mineralization is in volcanic rock as andesitic in composition as host.

1. Regional Geology of IUP AreaThis area is consists of volcanic rock as tuffaceous unit and andesitic lava as potential gold mineralization host rock.

Map 3. Regional Geology Map2. Regional StructureThe main structure direction is NE SW and also NW SE direction. There are some circular features as ancient volcanoes structure as observed on the landsat map. These structures as weak zone where is the mineralization would flown up.

Map 3. Regional Structure Interpretation3. Recommendation As regional geological setting this area is possible for gold mineralization area.

Geological structure and post volcanic structure were observed on the landast TM .

There is no previous work have been done for this area.

I will recommend to do site visit and due diligence work of this IUP.

Attachment :

Digital Terrain Model of IUP Area

Boy Adhitya3/30/2011

_1358669093.pdf