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Jeeroy |
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Kyrgyzstan |
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Au
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Super Porphyry Cu and Au
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IOCG Deposits - 70 papers
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All papers now Open Access.
Available as Full Text for direct download or on request. |
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The Jeeroy deposit is located in the South Tien Shan orogenic zone in north western Krygyzstan. It is 160 km west-southwest of the capital, Bishkek, in the Ala-Tau Range of the North Tien Shan Mountains, on a north-western regional fault within the Tien Shan gold belt.
The Ala Tau Range is predominantly underlain by Lower to Upper Proterozoic sediments, essentially sandstones, shales, phyllites and limestones with hypabyssal intrusives and effusives of quartz-trachytes, dacites and porphyries. These sediments and volcanics are tectonically juxtaposed against Cambrian-Ordovician thinly bedded limestones and dolomite and Ordovician-Devonian volcanogenic suites (andesites, dacite flows and tuffs) grading up to terrigenous red polymict and arkosic sandstones, agglomerates and shales of Devonian to Permian age.
The regional sequence is intruded by Neoproterozoic granodiorites, tonalites and quartz monzonites and larger Cambrian-Ordovician "granitoid" batholiths which vary in composition from diorite and quartz diorite to granodiorite and granite.
The Jeeroy deposit is hosted by a large lower Palaeozoic quartz diorite and quartz syenite complex with later porphyritic and aplitic intrusives with metasediments and volcanogenic sediments occurring as inliers within the intrusive complex.
Jeeroy is a low sulphide, gold-quartz mesothermal deposit generally associated with silica in which the sulphide content is less than 1%. Major sulphides are pyrite, bismuthinite and tetradymite. Most of the gold occurs as free gold less than 0.01mm in size, with minor telluride minerals (calaverite and krennerite).
An estimation of the pre-feasibility resource in 1988 was 11.218 Mt @ 5.92 g/t Au. Current reserves are 9.88 Mt @ 7.5 g/t Au, with resources of 25.21 Mt @ 3.97 g/t Au for a total of 174 t of contained Au.
Jeeroy was the subject of one of the papers delivered at an international conference in Perth in late 1998, and printed in the associated volume: Porter T M (Ed.) "Porphyry and Hydrothermal Copper and Gold Deposits: A Global Perspective", now available through PGC Publishing, Adelaide, Australia
The full abstract and the reference list from the paper can be displayed by selecting options offered below.
The most recent source geological information used to prepare this decription was dated: 1998.
This description is a summary from published sources, the chief of which are listed below.
© Copyright Porter GeoConsultancy Pty Ltd. Unauthorised copying, reproduction, storage or dissemination prohibited.
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Jenchuraeva, R.J. and Oakes, V. 2001 - The Jeeroy gold deposit: in Seltmann, R. and Jenchuraeva, R., (Eds.), Palaeozoic Geodynamics and Gold Deposits in the Kyrgyz Tien Shan; GCP-373 Field Conference in Bishkek and the Kyrgyz Tien Shan; 16-25 August, 2001 & Pre-meeting Field Trip A5 of the Joint 6th Biennial SGA Meeting in Krakow, Poland, Excursion Guidebook, pp 153-164
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Oakes B, Kay B D and Arifiev V, 1998 - The Jeeroy gold deposit, Kyrgyz Republic: in Porter T M, (Ed.), 1998 Porphyry and Hydrothermal Copper and Gold Deposits: A Global Perspective PGC Publishing, Adelaide, pp. 207-212
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Porter GeoConsultancy Pty Ltd (PorterGeo) provides access to this database at no charge. It is largely based on scientific papers and reports in the public domain, and was current when the sources consulted were published. While PorterGeo endeavour to ensure the information was accurate at the time of compilation and subsequent updating, PorterGeo, its employees and servants: i). do not warrant, or make any representation regarding the use, or results of the use of the information contained herein as to its correctness, accuracy, currency, or otherwise; and ii). expressly disclaim all liability or responsibility to any person using the information or conclusions contained herein.
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