Aziz-MiningMassive thick bedded limestone that forms prominent ranges and high peaks in the Axial Belt and Suliman and Kirthar provinces is named as Chiltan Limestone by hunting Survey Corporation, 1961.(Map No. 26-34 J/16). The name derived from Chiltan range South West of Quetta. The principle exposures of the Chiltan limestone are in the Northern mountain front of the flanks of the Urak synclinorium. The formation appears south of Quetta in a wide area that extends to Lat 29° N, and in narrow belt along the high ranges, which border Kachi plan and pass south to the vicinity of Karkh (Map No. 15-32 M/2). The Chiltan formation has been mapped also in the hills north of Quetta and in the belt passing from the Southeast through Ziarat (Map No. 26-39 N/11) to Dungan hill and Mazar drik (Map No. 25-39 C/5). Isolated exposures of the formation are in great anticlines near Dana Sar (Map No. 15-35)

Project Detail

Project Start date April 2009
Cultivation Plan Dr. Geol. Annapaola Gradizzi Viale del lavoro,7-37013 Caprino(VR)
International Consultants Benetti Macchine S.p.A. Via provincial Nazzano, 20-54033, Carrara, Italy Giulio Milazzo & Carlo Musetti (Dimension Stone Consultants) Dr. Geol Annapaola Gradizzi, Viale de Lavoro,7-37013 Capriono (VR)
Market potential and demand The stone is fine grained and compact Limestone of grey color with calcite vein. There are slight variations from light to dark grey within individual beds. The reserve is large enough for several years. The Federal Minister for Industries and Production inaugurated the project in July 2009. The blocks excavated for the quarry area are export quality. The target production is 4000 to 5000 m3/year of standard dimension block. The stone color is popular in countries like UAE,KSA, Kuwait, Oman, Qatar, UK, Itlay, USA, Malaysia , Japan, Singapore, Central European States and China
Location analysis Strategic reserve ideal for bench making
Government support Ministry of Industries and Production; Trade Development Authority, Government of Pakistan (TDAP); Board of Investment (BOI); FBR; DGMM Balochistan;
International partners Italy , Turkey , Korea & China
Machinery/technology used Wire Saw Cutting Technology
Local / International Consultants Dr. Riaz Ahmad /Dr. Irshad Ahmad
Project name M/s Aziz Brothers Joint Venture
Mine owner Maj. (Retired) Amir
JV Partner(s) PASDEC, MOI&P, Government of Pakistan and Maj. (Retired) Amir
Color of Stone Grey color
Type of Stone Grey Limestone
Commercial name of stone Cream Mastung
Location 40kms South of Quetta, reachable car in 1Hr Coordinates 29° 51-53’ N Lat; 66° 56-58’ E Balochistan province.
Country Pakistan, South Asia

The sample is highly fossilefereous with fine grained carbonate material. The fossils are variable in shape, size and internal structure. Some of the fossils also have the concentric pattern. Partially re-crystallized calcite grains are common with the diagnostics double set of cleavages and colored bands. Re-crystallized calcite grains are also not uncommon. The veinlets are also found containing calcite as fracture filling.

The formation is unto 6000 feet thick in the regions of Quetta and Dana Sar. Chiltan Mount is the best and most accessible reference locality.

The Chiltan Lime stone is mainly dark limestone with minor amount of amount of black shale. The limestone is characteristically massive and forms thick beds with rough-faced surfaces. The beds are generally 3-20 feet thick and show little or no internal layering.

In the Axial belt most of the limestone is dark to light grey, fetid, oolitic and Reefoid. This rock weathers dark blue-gray, some, however, is white on both fresh and weathered surfaces and resembles Spintangi limestone. This variety is found only among the highest strata in the vicinity of Mastung (Map No.24-34 K/3) and Taktu Peak (Map No. 26-34 N/3) and extremely oolotic and Reefoid. Only small fragmentary fossils have been seen in the Chiltan limestone of the axial belt.

Along the edge of Kachi plain the Chiltan limestone is pale-bluish gray, tan, or light brownish grey – much lighter colors than in the axial belt. Near Gokurt these rocks include white, Pisolitic limestone, and large fragments of the fossils such as mollusks and crinoids stems. Brachiated veins and nodules of black- and rusty – weathering chert are also common in some places.

Morphologicals Expression
The massive Chiltan limestone is a highly resistant formation and the rocks form some of the Highest Mountains. Among these are Koh-i-Maran and Koh-i- Siah (Map No. 24-34 K/15), Chiltan, Murdar Ghar and Taktu (near Quetta), Khalifat (Map 26-34 N/11) and Zardak (Map No. 15-35 M/1). Most of the high mountains mark the cores of great anticlines. Where the beds dip steeply, the erosion of massive beds has commonly produced a dog tooth or saw edged pattern and has resulted in a high rugged relief.

Age and Corelation
The Chiltan limestone was considered Vredenburg (1909) to be middle Jurassic age, on the bases of the ammonite Macrocephalites Polyphemus discovered near the Moro Rive. Some of the non fossiliferous upper strata of Chiltan Limestone could be of late Jurassic age. The Chiltan limestone also correlates with the comparatively thin shallow marine, ferruginous rocks, which include the so called “golden oolitic”

The Chiltan formation has important differences from that regions farther east in the Northern mountains front. Except for some of the highest strata of few localities, the limestone of the axial belt is darker and more oolitic than that farther east and contains and abundance of Reefoid structures, these features are evidently the result of special environment of deposition that prevailed in regions close to central Axes and are inferred to indicate and early phase of Axial Belt environment. The central geanticlines may have produced the shallow conditions necessary for the growth of reefs but did not prohibit the accumulation of a great thickness of strata.

Chiltan limestone has good reservoirs properties in the region for hydrocarbon and as well as for water. The water supplies to the Quetta city and surrounding produced by the Chiltan limestone underground reservoirs.

Being a thick and massive limestone it is overlying on many source and reservoirs rocks for hydrocarbon in the Axial Belt, where it gives fetid smell.

Chiltan limestone consist Pisolitic limestone beds locally and such kind Lithological changes have been seen in Nasai and Sinjavi limestone’ the deposit having such like lithology and should be mark specially during cultivation plan and general mining in order that to escape from a heavy loss because from the Pisolitic deposits, blocks recovery are impossible. However in the applied area of the Chiltan Limestone, such kind beds are rare.

Reefoid structures are very common in the exposed area of Chiltan limestone which is adding an extra good appearance in a polish section.

The Marketable colors are only developed in the Chiltan limestone in the south west of Quetta some parts of Axial Belt, where it has been exposed in the form a large anticline striking North South and series are extended towards South East and West in the region.

Physiographic Environment

  • Hilly area with no soil and vegetation; inclination of slopes 20-45°

Structural Setting

  • Eastern Limb of N-S trending anticline, limestone sequence referred as Chitlan Formation of Jurassic Age.
  • Thickness of Beds varies from 0,5 to 6m
  • Bedding plane varies in altitude from E-W with 10-20° southward inclination.

Lithologic Description

  • Fine grained and compact limestone of grey color, with white calcite veins.

Commercial Value

  • Goods for domestic sales (Quetta and Karachi markets); to be verified for international sales.


  • Slight shade variation from light to dark grey were noticed within individual beds.


  • Medium density; the dominant system is NE-SW trending, with 70° southward inclination and almost perpendicular to bedding plane.


  • Considering the extent of area (9 ha) the reserves may be considered large enough for several years exploitation, that is the order of hundred thousand m3.

Quarry Development Plan Identification of Opening Site

  • At least three opening sites were identified, based on favorable topographic condition and easiness to start mining with state-of-art technologies.
  • Thicker bed of limestone of often overlain by thinner beds, which can be easily removed, as overburden, although some commercial blocks may be also produced from this relatively thinly bedded portion of limestone sequence. Project Description PASDEC has signed a joint venture with M/s Aziz Brothers for quarry up gradation project in Mastung. The area is hilly area with no soil & vegetation, inclination slope is 20-45 °.Eastern limb of N-S trending anticline ;Limestone of slop referred as Chitlan Formation of Jurassic age. Thickness of the beds varies from o,5 to6 m . Bedding plan varies in altitude from E-W with 10-20 ° southward inclination. The stone is fine grained and compact Limestone of grey colour with white calcite veins. There are slight variation from light to dark grey within individual beds. The reserve is large enough for several years . The Federal Minister for Industries & Production inaugurated the project in July 2009. The blocks of the quarry are export quality. The target production of the quarry is 4000 to 5000 m3 /year of standards dimension block. ; also called Mastung II