Wednesday, January 20, 2010

Pakistan gem safari

by Alain Darbellay GGGems)

� 2004 All rights reserved.

PAKISTAN Tourmaline from Estaknala, located at the foot of Haramosh mount, 7 kms from Sassi. (Between Gilgit and Skardu) The Northern areas conceals treasures, such of rubies, emeralds, sapphires, aquamarines, topazes, tourmalines etc. Unfortunately, their extraction directly in the mother-rock, makes the exploitation very difficult. Emeralds from Sassi found in a limestone.

A gravel-top 241 kms road track connects Gilgit to Skardu, the capital of Baltistan perched 2438 meters above sea level. The journey takes 6 to 8 hours. Sassi is located at the edge of this road, in the geological belt made up amongst other things of amphibolites surrounding Nanga Parbat, one of the famous peaks of the Himalayas. In Sassi, life is hard, but the inhabitants are friendly. At an elevation of 1,454 meters lies Gilgit. This wood bridge is one of the longest of the The Rakaposhi Volcanic Complex previously called the greenstone complex covers a large part of the Hunza Valley.Four main lithological elements comprising the whole mass: 1 basalt-andesite-dacite-rhyodacite to rhyolite. 2 greenschists, actinolite,chlorite schists, hornblend schist, amphibolite and agglomerates 3 Medium crystalline limestone and marble, quartzite, chert, slates and micaschist. 4 The igneous intrusions are mostly in the form of acid and basic sills and dykes. Leucocratic granites bodies are quite common

Himalayas. Rakaposhi overview from Haliabad. � Valley of Hunza. Situated at an elevation of 2,438 meters, Hunza Valley is the spot of the famous rubies found in a metamorphic limestone, said:( Ganesh marble.) -------------------------------------------------- Topaz from Dasso ( Shigar.) � Shigar valley is the gateway to the great mountain peaks of the Karakorams, Gasherbrum peak & K-2. -------------------------------------------------- Cherry topaz from Mardan ( natural coulour.) � Mardan, on the road to Swat conceals the only deposit of natural cherry topaz in the world. -------------------------------------------------- � Emerald from Mingora, the main city of Swat. The deposit discovered in 1958 was closured and monopolized by the government, it is what compelled certain inhabitants residing in the neighborhood to dig under their house in order to research the prohibited treasure. TECTONIC CONTROL OVER EMERALD MINERALIZATION IN SWAT. It is in the Swat valley that Alexander of Macedon fought Emerald and chromian tourmaline occur in carbonate-talc/ and won some of his major battles before crossing over serpentine/chlorite rocks, carbonate-bearing talc schists, to the plain of Pakistan. and associated quartz veins near Mingora, Charbagh, and Let us note that the emerald was known for a long time Shangla. The rocks are altered ultramafics found in a in this valley, thanks to an analysis on a stone of a discontinuous belt of volcanic, volcano-sedimentary, and Gallo-Roman ear-ring, witch shown that this emerald sedimentary rocks that have undergone high P-low T originated in of the mines located in the Swat valley. metamorphism. This thanks to the measurement of the report/ratio of

This is at the occasion of one of our visits in the valley, that some children tolled us that they found some fragments of emerald in the Swat river. concentration of the isotopes 18O and 16O. Indeed, the isotopic composition out of oxygen of this precious stone is dependent on that of the rock where it crystallized. � Central street of Mingora. ------------------------------------------------- Blue-green tourmaline from Kunar valley, Afghanistan. Nimak mendy, old Peshawar, on the road to Afghanistan. Mountains of Afghanistan. Alain talking with our Afghan friend Sarbaz. GGGEMS.COM

� 1987 - 2004 All rights reserved.

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