Tellerhäuser Project

A joint East German / Soviet exploration effort (SDAG Wismut) between 1968 and 1991 resulted in the discovery of a major tin-indium-zinc-iron deposit that is now referred to as Tellerhäuser. SDAG Wismut also explored for and mined uranium in the area and some cross-cutting veins were mined in the deeper levels of Tellerhäuser.

As part of the Wismut exploration programme, over 65km underground access was developed and 141,342m diamond drilling was completed in 2112 boreholes. Additionally, 1,326 channel samples were collected from underground and trial mining of around 40,000 tonnes of ore was undertaken before the collapse of the Berlin Wall. The replacement cost of this work is estimated at over $30M for the drilling alone plus over $200M for the underground development and overheads.

This work resulted in a resource statement to Soviet standards but this was not undertaken under JORC guidelines. Saxore Bergbau GmbH (SBG) has spent the last 18 months compiling and digitising this large volume of information, culminating in an independent resource estimate by H&S Consultants (HSC) in Brisbane, Australia, reported in compliance with JORC guidelines. The total resource estimate is below:

Tellerhauser Germany
Tin

Indicated
Tonnes (Million): 6.2
Grade (%Sn): 0.47
Tin (Tonnes): 28,900

Inferred
Tonnes (Million): 15.8
Grade (%Sn): 0.46
Tin (Tonnes): 72,600

Total
Tonnes (Million): 22.1
Grade (%Sn): 0.46
Tin (Tonnes): 101,500

In addition to the tin, separate indium and zinc resources have been estimated. As only certain parts of the core was analysed for indium, a value of 1ppm In has been  inserted where no indium assays are available, in order to adequately model the data. Thus the indium resource estimates may be conservative. Due to the amount of assaying and lack of QaQc data, the indium and zinc resource estimates are only classified as inferred:

Tellerhauser Germany
Indium Resource

Inferred
Tonnes (Million): 16.0 
Grade (ppm In): 134 
Indium (Kilograms): 2,149,000

Tellerhauser Germany
Zinc Resource

Inferred
Tonnes (Million): 18.2 
Grade (%Zn): 1.10 
Zinc (Tonnes): 200,200

The indium and zinc are partially coincident with the tin and with each other but do not overlap entirely. In order to clarify the relationship of these elements to each other,  the various overlapping resources have been tabulated below. A tin equivalent grade has been calculated in order to compare relative valuations of the various zones using metal prices of US$17,500 for tin, US$2,000 for zinc and US$680/kg for indium and assuming 65% recovery for all metals. It is likely that zinc and indium will have better recoveries but using that assumption would increase the tin equivalent grade and hence the conservative assumption of 65% has been used for all metals. This results in the following estimations:

Sub
Category
Tonnes
(Million)
SN
(%)
IN
(PPM)
ZN
(%)
SN
(Tonnes)
IN
(KG)
ZN
(Tonnes)
SN-EQ
(%)
Sn>0.2%, In>50ppm 7.0 0.57 111 1.11 40,300 778,700 78,100 1.13
Sn>0.2%, Zn>1.5%, In<50ppm 0.9 0.60 9 2.53 5,600 8,500 23,600 0.92
Sn>0.2, Zn<1.5, In<50 11.0 0.41 13 0.34 45,300 142,300 37,900 0.50
Total within the tin resource 19.0 0.48 49 0.74 91,200 929,500 139,600 0.76
Sn<0.2, In>50 9.0 0.10 152 0.69 9,000 1,371,300 62,500 0.77
Sn<0.2, In<50, Zn>1.5 1.4 0.09 1 2.55 1,300 1,700 35,300 0.39
Total outside the tin resource 10.4 0.10 132 0.94 10,400 1,373,000 97,800 0.72
Total Skarn 29.3 0.35 78 0.81 101,600 2,302,500 237,400 0.74
Schist Sn>0.2 2.9 0.34 0 0 9700 0 0 0.34
Grand Total 32.2 0.35 71 0.74 111,300 2,302,500 237,400 0.71
*Minor rounding errors may occur.

Thus, as well as being a significant tin deposit in its own right, Tellerhäuser can be seen to be a very large tin equivalent deposit (about 215,000t tin equivalent) and possibly the largest and highest grade indium resource reported under JORC guidelines in the world.  It is also interesting that there does not appear to be any statistical correlation between zinc and indium (or tin and indium) and the indium appears to be associated with either chalcopyrite or in its own mineral roquesite.  Preliminary testwork suggest that these minerals can be readily separated and that indium can then be extracted from this concentrate by using an organic acid for dissolution and then collecting the indium via electrolysis.  Most indium production is currently as a by-product of zinc mining and indium is much more difficult to extract from this type of deposit.

SBG is currently conducting a scoping study using Hatch, one of the world largest mining engineering companies, and this should be completed by the middle of 2015.  SBG is also in the process of collecting channel samples from underground to both confirm the previous assaying and to obtain bulk samples for additional metallurgical testwork.

Download a Press Release on the Tellerhauser Resource.

+ Competent Person Statements       Table 1 >       H&S Consent >

The data in this report that relates to Exploration Data, cut off grades, metallurgical recoveries and metal price assumptions for the Tellerhauser Project is based on information evaluated by Mr Antony Truelove who is a Member of The Australasian Institute of Mining and Metallurgy (MAusIMM) and the Australian Institute of Geoscientists (MAIG) and who has sufficient experience relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Persons as defined in the 2012 Edition of the 'Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves' (JORC Code). Mr Truelove is a Director of Treliver Minerals and consents to the inclusion of the exploration data in the report of the Mineral Resource in the form and context in which they appear.

The data in this report that relates to Mineral Resources for the Tellerhauser Project is based on information evaluated by Mr Simon Tear who is a Member of The Australasian Institute of Mining and Metallurgy (MAusIMM) and who has sufficient experience relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the 'Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves' (JORC Code). Mr Tear is a Director of H&S Consultants Pty Ltd and he consents to the inclusion of the estimates in the report of the Mineral Resource in the form and context in which they appear.

Project Locations

I am extremely pleased that we have been able to report resource estimates for the Tellerhauser project in accordance with the 2012 JORC Code & Guidelines. This resource now sits as one of the largest undeveloped tin deposits in the world and also boasts one of the highest tin equivalent grades. Tellerhauser is also the largest and highest grade indium deposit reported in accordance with 2012 JORC guidelines in the world. Our aim now is to increase the category of estimation by collecting underground samples to confirm the previous assaying.

Mark Thompson - Treliver's Chairman

Unit 2 Hurling Way, St. Columb Major Business Park, St Columb, Cornwall, TR9 6SX   |   Tel: +44 (0)1637 889 341 |   Email: info@treliverminerals.com
Legal Information   |   Copyright Anglo Saxony Mining 2015
Menu
Mobile logo