Marwar Mineral Exploration Pvt Ltd

 

Marwar Mineral Exploration Private limited (MMEPL) is   a private, base metal – specific company which was set up essentially to explore, discover and develop base metal (Copper, Lead and Zinc ) properties in India. MMEPL is owned by Australian India Resource (AIR), Perth (80%) and Sun Mining and Exploration Investment Ltd (20%). Established in the year 2006 as a fully owned subsidiary of Geomysore Services India Pvt Ltd (GMSI), MMEPL initially focussed on the development of base metal projects in Rajasthan. In the year 2009, as a part of regrouping, MMEPL was demerged from GMSI as an independent company with the objective to develop base metal projects in India. The registered office, of the company is now located at Bangalore.

 

 

MMEPL along with associate companies, eg., GMSI, has covered many prospective areas under Reconnaissance, Prospecting and Mining Lease applications. The main exploration activities are in the States of Rajasthan, Maharashtra, Madhya Pradesh and Karnataka. It has a dedicated team of geologists headed by an Exploration Manager.

 

 

Exploration work carried out by MMEPL and its associated companies so far led to the identification of several key targets, on which resource drilling and PFS studies will be carried out. These key projects include 1) Dhani- Basri Cu-Au project, Rajasthan, 2) Dariba-Akola Cu project, Rajasthan 3) Kolari Zinc project Maharashtra and 3) Bukkambudi Zn-Pb-Ag project, Karnataka.

                                      Base metal projects of the AIR group

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Dhani – Basri Project
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Geological map of Dhani-Basri project area

 

Dhani – Basri project is one of the key copper – gold projects of the company, which is located in NE Rajasthan. The project area forms Part of Geologically favourable Delhi Fold Belt. Delhi Fold Belt belt hosts more than 6000 ancient workings for copper. Some of these ancient workings have been drilled by Geological Survey of India (GSI) and Mineral Exploration Coroporation (MECL). Dhani Basri is one among them. The project area is located in the proximity to Khetri copper smelter and has excellent road and rail access.

 

GMSI has obtained a Reconnaissnce Permit (RP) covering 1800 sq.km, which includes Dhani – Basri prospect and carried out systematic exploration, including geochemical and geophysical surveys. Based on the work carried out during RP stage GMSI has applied for 18 sq.km of the Prospecting License (PL) on which it has preferential right. The PL application is under processing with the Government of Rajasthan.

 

Copper-Gold mineralization in Dhani – Basri area is associated with silicified quartzite, psammopelites, chlorite –biotite schist and   amphibolites. Mineralization is hosted in silicified quartzite, which trends NNW-SSE with a moderate dip to SW. MECL carried out 4215 m of DC drilling in 16 holes in the Dhani Basri area and estimated a total resource of 5.13 Mt @ 1.17% Cu and 1.27 g/t of Au under probable and possible categories. These estimates were made with 0.5% and 0.5 g/t cut off and using 3 m parting width and 2 m of minimum stoping width. The estimated resource covers 530m of strike length and 270 m depth of the ore body. This resource can be classified under 331 of UNFC classification. With a cut off of 0.2% Cu and 0.2 g/t Au the total resource is estimated to be 8.13 Mt @ 0.82% Cu and 1.01 g/t of Au. Mineralization is open both along strike and dip.

 

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Geological cross section of the Dhani-Basri copper gold lodes

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Copper-gold lodes of Dhani – Basri area

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GMSI/MMEPL have undertaken systematic geochemical and geophysical surveys in the project area during RP stage. These studies have revealed northern and southern extensions of the ore body. Detailed drilling is planned on this project.

Dariba – Akola Project
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Geological map of Rajsamund Project area showing locations of Dariba and Gujaron Ki-Bhagel blocks

Dariba – Akola project is located in the southern parts of north – south trending Panchmata-Bhinder belt, which considered as equivalent of the prospective Aravalli belt . The Panchamata-Bhinder belt is dominated by meta sediments, rare meta volcanics, and meta rhyolitic tuff. The contact between the supracrustal belts and the basement gneisses is marked by ductile shear zones. A number of ancient prospecting/mining sites have been reported from this belt. 8 sq.km of PL applied, which is applied by GMSI is in the advanced stages of processing.

 

 

Cu mineralization in Dariba – Akola block is in sheared calc-silicates, amphibolites and biotite schist. Sulhides are mobilized along the shear zones. Three parallel, easterly dipping mineralized zones, along a N-S trending shear zone, coinciding with a gravity-cum-magnetic discontinuity have been identified. Investigations by GSI, followed by MECL have indicated a resource of 5.54 Mt with 0.51% Cu at 0.2% cutoff in this prospect . Mineralization is open both along strike and depth.

 

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Drill intersections in Dariba-Akola area


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Mineralized zone in Dariba – Akola area

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n9GMSI/MMEPL carried out detailed exploration during RP stage which include geochemical and comprehensive ground magnetic survey. The derivative maps show continuity of the magnetic anomalies, structure and lithology from the known parts of the prospect into the soil covered areas.   Reconnaissance geochemical sampling of the various rocks shows copper values upto 2.3% near Dariba (Akola). A few samples from a granite gneiss have reported around 1.1% Cu. Anomalous Cu values have been obtained from a number of samples. Ground checking of the anomalies has indicated continuity of mineralization in isolated places along the well defined magnetic zones. These zones will be taken up for further intensive exploration in the next phase of exploration.

PROJECTS IN MAHARASHTRA
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Geological map of Sakoli Fold Belt with concession areas of MMEPL

 

The triangular shaped volcano sedimentary belt of Sakoli Group, comprising predominantly of metasediments with Banded Iron Formation (BIF) and volcanics   is the most promising area for zinc outside the State of Rajasthan. The south western and eastern margins of this belt have a  number of prospects with considerable potential for zinc mineralization.   Geomysore Services India Pvt Ltd (GMSI) , the associate company of MMEPL, had earlier carried out   reconnaissance exploration over 3482 sq.km covering the entire Sakoli belt. On the basis of this work a total of 4 PLs and 1 ML were applied in the Sakoli Belt . a 10 sq.km of PL over Kolari project has already been granted.

 

KOLARI ZINC PROJECT:

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Zinc-bearing BAGC layers in Kolari Prospect. Drill locations are also shown

  Zinc mineralization is hosted in Banded Garnet Amphibole Chert (BAGC) rock. Strike extension of these bands is open. Zinc rich layers are associated with mineralization of Copper, Tungsten and Molybdenite. Mineralized zones were thickened near the hinges of these folds. Mineralization in the BAGC bands is manifested by layers of sphalerite. Rare chalcopyrite, galena, pyrrhotite, scheelite and arsenopyrite are noted along with sphalerite. About 2.8 km length of these mineralized BAGC bands were investigated by govt agencies such as GSI and MECL and a total of 8.27 million tonnes of ores at @ 6.8 % Zn at 2% cut off grade have been reported by these agencies.

 

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Chargeability map of Kolari area

IP survey and limited EM survey indicated extensions of the BAGC bands under soil cover both along NW and SE directions. IP survey indicates significant chargeability zones towards the SE of the GSI’s explored area, which indicates a strong possibility of the strike continuity of the mineralized zone. EM surveys carried out on this prospect have indicated a possible extension of the lithopackage to the depth of 400m. Detailed drilling is planned for this prospect.

TIRKA ZINC – LEAD PROJECT:

This is located along the eastern margin of the Sakoli Fold Belt (SFB) in a geological setting similar to that of Kolari Zinc prospect and the prospective area extends for about 20km. Large slag heaps, similar to the ones found near the ancient zinc mining/smelting sites in Rajasthan, are observed in this tract which led to the discovery of the Zn-Pb mineralization in this area. Soil geochemical surveys have shown a wide anomaly of 0.3% Zn+Pb in this area. Lead- Zinc mineralization occurs along sulphide-bearing cherty rocks, interlayered with carbonaceous phyllite and mafic volcanic rocks. Stream sediment sampling by GMSI/MMEPL has confirmed the presence of gahnite, an indicator mineral for zinc mineralisation in several streams which drain the above mentioned lithopackage. These stream anomalies are being followed up to locate the extensions of the Tirka Zinc prospect.

PROJECTS IN KARNATAKA

BUKKAMBUDI PROJECT :

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Mineralized zones in Bukkambudi Project

Bukkambudi is a base metal project, located in the Archaean Shimoga belt in the State of Karnataka. Mineralisation is observed mostly in chlorite schists, locally affected by carbonatisation. This area was extensively explored GMSI which held an RP of 180 sq.km and had conducted geological mapping, ground magnetic surveys, trenching and drilling, besides extensive geochemical sampling. The assay results revealed presence of silver up to 627 ppm associated with the lead-zinc ores. The ore occurs in the form of sheeted quartz-carbonate vein system within chlorite schists. Systematic channel sampling across the mineralized zone indicated zinc content up to 13% and Lead up to 5%. Eleven samples assayed zinc >5%. The average silver grade varies from 39 to 56 g/t and average Lead+Zinc varies from 2.15 to 4.94%.  Based on the results of Pb, Zn and Ag assay of rock-chip and channel samples, three sub parallel lodes were delineated, viz., western, central and eastern lodes. The cumulative length of these lodes works out to 459 m with an average width of 4m within 58 m broad zone of base metal bearing vein system.

 

 

Preliminary ground magnetic survey work showed high magnetic anomaly along the contact between magnetite bearing chlorite schist and mineralized chlorite schist.

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