PT. Maliki Resources currently controls approximately 2.980 hectares from approximately total of 15.000 hectare high prospected area, with more than 90% of the area has explored by previous company (Newmont’s and Rio Tinto). Potential exists both at depth and along strike of the known mineralized- altered zone of silica-clay capping the large area to north and south of IUP block. Properties under the Company’s control include a few locations of traditional mines with low gold production. Traditional/illegal mines located north west of the Maliki properties has mined gold to depths of 20 and 60 feet, respectively.

To date exploration activity result:

  • Two existing mineralization areas confirmed
  • Known mineralization-alteration area approximately larger to the north out of IUP boundary, indicated porphyry and epithermal mineralization system are present.
  • Prospecting work to identify additional mineralization areas has commenced

Since ground-exploration programme has been undertaken consisting of regional sampling and mapping and as a result of this exploration program two existing prospect confirmed. The prospective zones, demonstrate many of the same characteristics as the previously identified by Rio Tinto at Maja (north of the property). One of the two zones has received preliminary results from the prospecting program, indicating grades of up to 0.3g/t Au from rock sample a 3.5 gr/t Au from panned concentrate sample.

The completed result of sampling are:

The results have confirmed the areas of previously known mineralization have outlined a number of anomalous areas that warrant further investigation.



The block is applied IUP non metal mineral exploration by PT Maliki Resources for Zirkon and it associates coveraging area 2.980Ha and located at Sumbawa District.

The block area administratively part of Sumbawa District , is located in the central part of the island of Sumbawa, situated at northeast of major Cu – Au Porphyry deposit Elang approximately 35 kms east of Sumbawa Besar the main capital of Sumbawa District.

The IUP area administratively located in the Maronge Sub District, Sumbawa, geographically within 8°37’30” – 8°53.5″ LS dan 117° 40′ 15″ – 117° 45′ 48,5″ BT, lies in north east of the Sumbawa island on the east beach of Sangoro – Ngali, east of Lape about 45 km from Sumbawa Besar. Access to the area is very good either by land or sea transportation.

A very open possibility for discovery an economic mineralization deposit such as Au/Ag Epithermal mineralization, Cu – Au Porphyry mineralization, Pb – Zn Veins deposit or Fe and Mn skarn deposit in the area therefore its strongly recommend to continue the exploration by conducting detail geological mapping, systematic geochemical sampling and geophysical survey on the potential areas.


Block Location


PT Maliki Resources IUP Exploration Mining License


Regional and Local Geology


The islands of Lombok and Sumbawa are part of the lesser Sunda Islands or Nusa Tenggara, situated on the western extension of the Banda Arc. The stratigraphy of the two islands is roughly equivalent. The oldest rocks are generally a thick pile of andesitic pyroclastics, flows and intermediate intrusives with minor shallow marine sediments and limestones. Foraminifera in the sediments indicate a Miocene age. The older rocks are regionally metamorphosed to low grade greenschist facies.

A thin veneer of dacitic pyroclastics with associated diatreme breccias locally, overlies the Tertiary sequence. A thick blanket of epiclastics is exposed along the southern coast of Sumbawa and locally on south Lombok. The epiclastics are probably derived from the Miocene volcanic arc, but appear to have escaped the regional metamorphism seen inland.

Tertiary intrusive rocks are common in the volcanic terrane. The shift from andesitic to dacitic volcanism during the Tertiary probably reflects differentiating phreato magmatic centres. Older intrusives are commonly diorites, while later intrusive stocks and dikes are quartz diorites and tonalites. The youngest intrusive phases are dacites which locally form diatreme – dome complexes.

Quaternary rocks in Nusa Tenggara consist of the products of more recent volcanism, and related erosion and sedimentation. The central plain, consisting of alluvium and recent ash cover, effectively separates the Tertiary and Quaternary volcanic provinces in Lombok, but is lacking in Sumbawa.



A strong conjugate system of WNW – NW and NE faults are the dominant structural feature on both islands. The structures are probably related to north directed compression along the Miocene volcanic arc. Intrusives are preferentially emplaced along the NE structures .

A prominent NE transform running between Sumbawa Besar and Lunyuk forms a major discontinuity with a 10 km sinistral strike slip displacement. Miocene volcanic centres west of the structure are aligned W and to a NE while those in the east are aligned approximately east – west.


Regional/district geology




Regional/district structure and mineralization zonation



Olat Maja (Sangoro) Summary (1987 – 1992)


Work done:

 Regional and follow up s-sed sampling
 Selective Rock Chip sampling
 Geological mapping 1 : 10.000 Scale


Result Summary

 Known as Sangoro Anomaly, Ranked 14 out from 36 anomalous areas generated from regional s-sed sampling program done by Newmont in 1987
 6 anomalous drainage approximately covered an area of approx. 20km2
 Max values from s-sed 40 ppb Au (80#); 24 ppb Au (BLEG) and 3.87 ppm Au; 236 ppm Ag (RC)



Olat Maja (Sangoro) Summary (1993 – 1997)


Work Done and Result Summary:

 Stream sediment sampling, Rock chip sampling
 Soil sampling
 Ground Geophysical survey (IP and Groundmag)
 Airborne geophysical survey (magnetic + Radiometric)
 Shallow Drilling
 Known as Olat Maja, Teratak, Bukit Tengah and Sabarati Prospect
 Airborne Magnetic Survey 1994, highly magnetic anomaly
 Drilled 14 shallow RC holes totaling 1,235m in 1996, best result 42m @0.64 ppm Au; 1880 ppm Cu and 21 ppm Mo

Recent update (Jan, 2012) confirmed new prospect at center of the block, 8 rock chip samples were taken with best assay result 0.31ppm Au, 31.3 ppm Ag, and 93 ppm Mo, these samples are grab from silisified (silica-clay alteration) outcrop, it is noted that the dimension of the alteration is 2x4km square. Low gold contain with high molybdent indicated strong oxidized and leached at this area.



Based on data from previous researchers (Holland, Newmont Nusa Tenggara, 1988, Rio Tinto 1995) and the surrounding area including Maja Olat Lab. Sangoro , Ngali and Olat Lintang including areas that have potential for the presence of metallic minerals including Gold, Copper, Silver and others. This is evidenced by the fairly detailed exploration done by PT. Newmont in the year 1988 – 1989 followed by further exploration drilling by the PT.Rio Tinto in the year 1994 to 1996.

Although the two companies above are only interested in the presence of metals such as: gold metal (Au), Silver (Ag) and Copper(Cu) but they also reported the presence of other minerals such as Manganese (Mn) associated with quartz and base metals in Olat Maja vein and surrounding areas.

The history of the Sangoro area indicates that there is a significant opportunity to apply modem exploration methods to a known mineralized zone within the block .


Anomolous area define by BLEG samples within the block


PT Maliki Resources geology and alteration