SOURCE: Midex Gold Corp.

October 19, 2009 16:06 ET

Midex Gold Provides Geological Details Outlining the Potential of The New Golden Hills Property

DAR ES SALAAM, TANZANIA--(Marketwire - October 19, 2009) - Midex Gold Corp. (MXGD-OTCBB, management provides an overview about their recent purchase of 100% of the Golden Hills gold property. "We are providing our shareholders with detailed geological information to show the potential that our geologists believe this property has to become a successful mining operation," stated Morgan Magella, president of Midex Gold.


The Masonka Greenstone Belt is part of the E-W to WNW-ESE-trending Undewa-Mafulungu Corridor, which comprises of a 4 km wide by 12 km long belt of exposed and deeply weathered Neoarchaean greenschist-amphibolites facies felsic, mafic and ultramafic igneous-sedimentary rocks. The Belt is part of the discontinuous, linear magmatic-sedimentary rocks whose geometrical setting is comparatively analogous to the supracrustal belts of South West, Southern Cross and Murchison Gold Provinces in the Vilgarn Craton of Western Australia. Although the latter are characterized by low proportions of greenstones, similar to Masonka, they host large gold deposits such as Boddington, Marvel Lock and Mount Magnet respectively. Masonka Greenstone Belt displays terrane-scale geological settings defined by relatively incompetent, bimodal volcanic rocks, syn- to late-orogenic amphibole-granitoid and late- to post-kinematic K-feldspar granitoids. Competent belts of gneisses, migmatite and granulite bound the Masonka Greenstone Belt to the north and south.


The Golden Hills License Area is situated in Masonka Greenstone Belt, which is part of the Undewa-Mafulungu Corridor; and is underlain by migmatite and biotite-gneiss terrains, mafic-ultramafic igneous and sedimentary rocks. The Belt is underlain by bimodal-volcanic rocks, which evolved via tintra-cratonic plume-related extensional magmatism or subduction-related continental rifting processes.

Apart from the local geological setting, the Masonka Greenstone Belt is comparatively similar in terms of setting, with well-researched gold camps such as the:

* Hemlo's > 150 T Au deposits in the Wawa Belt; and Kirkland Lake in the Pontiac Belt Canada

* Boddington, Plutonic, Day Down, Marvel Loch and Mount Magnet mines in Western Australia

* Big Bell, in Arizona, United States


The Masonka Greenstone Belt is distinguished from high-grade metamorphic belts of the Dodoma Group of central Tanzania by its specific terrain geology, geometrical orientation and alteration minerals.

The geology of the Golden Hills license area is defined by strongly deformed greenshist to garnet-amphibolite-facies intermediate to ultramafic igneous-sedimentary rocks, syn- to late- orogenic amphilbole-granitoids. The belt is traversed by networks of NW-SE-trending higher-order brittle-ductile shears, myfonite zones and fault splays bounded by relatively lower order major tectonic boundaries. These rocks are crosscut by NE-SW-trending cross-faults and mafic dykes and late to post-kinematic potassic-feldspar granitoids.

Apart from the basaltic to rhyolitic rocks, the Masonka Greenstone Belt is underlain by horizons of gossan after massive sulphide, fuschitic / sulphidic chert and quartzite, interbands of pelitic sedimentary / volcanic rocks and BIFs.


At prospect-scale, tight to isoclinals and drag folds are preserved in pelitic-volcano-sedimentary rocks, extensive shear zones at contacts between greenstones and amphibole-granite, between greenstones and internal granitoid and dolerite sills are locally ultra-mylonitic. The later is well-developed at the contract between footwall basalts and intermediate volcanic rocks and between mafic greenstones and amphibole granitoids.


Major alteration minerals including stockwork and veins, silicification, epidote, actinolite-tremolite, chlorite and sulphidation are evident in the license area:

* Extensively bleached zones of potassic alteration

* Silicification / associated quartz-vein / stringers

* Areas of very strong fracture filling and disseminated pyrite / arsenopyrite and pyrrhotite

* White and smoky quartz veins with slivers of sheared country rocks with coarse-grained fracture filling and blebby pyrite

* Sulphidation including arsenopyrite, pyrite and chalcopyrite

Disseminated and fracture-filling pyrite, arsenopyrite and chalcopyrite are among the common sulphides occurring in strongly sheared dolerite and mylonitic mafic rocks. Abundant quartz stringers and stockwork quartz veins are common in andesitic to basaltic andesite.


The Masonka Greenstone Belt's greenshist-amphibolite facies greenstone lithologies survived tectonic burial, uplift and erosion in the high-grade metamorphic belts of the Ilangali-Undewa Corridor in the Dodoma Schist Belt. Major Au-Ag-As in soil geochemical anomalies in the over 4 km wide by 12 km long Masonka Greenstone Belt is partly coincident with zones of multiple deformed greenshist to amphibolite facies greenstone belts. Networks of shear-foliated and mylonitic zones form part of the fault splays off the major terrane boundaries mapped and interpreted at the contacts between greenstones and amphibolite-granitoid.


Midex Gold is positioned to take advantage of Tanzania's rich mineral resources by developing a select portfolio of near-term gold and diamond production projects. With the company's network of strategic relationships with senior mining professionals and government officials in Tanzania, it is poised to identify key mining concession targets that are ready to be developed.

forward looking statement

No Exchange has either approved or disapproved of the information contained herein. This news release may contain forward-looking statements based on assumptions and judgments of management regarding future events or results that may prove to be inaccurate as a result of exploration and other risk factors beyond its control and actual results may differ materially from the expected results. The Company does not expect to update forward-looking statements continually as conditions change. Important factors that could cause actual results to differ materially from the Company's expectations are disclosed in the Company's quarterly filings with the SEC and other periodic filings.

This announcement was originally distributed by Hugin. The issuer is solely responsible for the content of this announcement.

Copyright © Hugin AS 2009. All rights reserved.

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