Mineral exploration in Germany - Deutsche Rohstoffagentur

Mineral Exploration in Germany –
Activities and Opportunities
PDAC 2012
Thomas Seifert (TU Bergakademie Freiberg)
Jens Gutzmer (Helmholtz Institute Freiberg)
Toronto, 07. March 2012
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif

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Exploration Projects for Mineral Deposits in Germany
Mineralization type
1. Polymetallic sedimenthosted
massive sulfidetype
(Pb, Zn, Cu, Ag, Au?)
2. Kupferschiefer-type (Cu,
Ag, Pb, Zn, Au?)
3. Sn-W(-Mo-Li) greisen-,
vein-, & skarn-type
4. Ag-rich base metal veintype
5. Ag-rich Bi-Co-Ni-As veintype
6. Fluorite and barite veintype
Location
exploration target
1 (4, 6)
3-6
Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif
2

Page 3
Exploration Projects for Mineral Deposits in Germany
Mineralization type
1. Polymetallic sedimenthosted
massive sulfidetype
(Pb, Zn, Cu, Ag, Au?)
2. Kupferschiefer-type (Cu,
Ag, Pb, Zn, Au?)
3. Sn-W(-Mo-Li) greisen-,
vein-, and skarn-type
4. Ag-rich base metal veintype
5. Ag-rich Bi-Co-Ni-As veintype
6. Fluorite and barite veintype
Location
exploration target
1 (4, 6)
3-6
Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif
2

SHMS Deposit Rammelsberg (eastern Goslar Basin):
The Harz License of Scandinavian Highlands 1
1: The license of Scandinavian Highlands covers the historic Harz mining district Rammelsberg and historic Agbase
metal ore fields
Source: www.scandinavian-highlands.com
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Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif

SHMS Deposit Rammelsberg: Ore Types & Production
Ore Types 1
Typical mottled Cu-rich ,Melierterz‘ (1) and Zn-Pb-Cu-rich ‚Banderz‘ (2-5),
Rammelsberg SHMS deposit
Cumulative production 2
27.5 Mt polymetallic sulfide ore: 2160 kt Zn, 4590 kt Pb, 540 kt Cu, 4050 t Ag
1: cf. Large et al. (1999)
2: cf. Stedingk (2009)
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Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif

The “Gosetal” Anomaly – Indication for a Rammelsberg Twin?
Model
Source: www.scandinavian-highlands.com
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Gosetal Magnetic Anomaly
„Gosetal“ Magnetic Anomaly
Explanation
• 1-2 km west of Rammelsberg mine, situated within the „Wissenbacher
shales“, similar to the Rammelsberg deposit
• Strong conductor, unique in the surveyed area; shallow crustal level;
same depositional sub-basin as the Rammelsberg ore bodies!!
Rammels-
berg
Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif

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Exploration Projects for Mineral Deposits in Germany
Mineralization Type
1. Polymetallic sedimenthosted
massive sulfidetype
(Pb, Zn, Cu, Ag, Au?)
2. Kupferschiefer-type (Cu,
Ag, Pb, Zn, Au?)
3. Sn-W(-Mo-Li) greisen-,
vein-, and skarn-type
4. Ag-rich base metal veintype
5. Ag-rich Bi-Co-Ni-As veintype
6. Fluorite and barite veintype
Location
exploration target
1 (4, 6)
3-6
Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif
2

Distribution of Kupferschiefer ore deposits in Germany and
Poland
Position 1
Exploration
Spremberg
hanging
wall
Kupferschiefer
footwall
Stratigraphic position of the Kupferschiefer
in the Permian of Central Europe
1953-1980: Geophysical exploration and ca. 130 deep exploration drills
1: Kopp (2009) modified after Paul (2006) and Pöhlig (1986); Oszczepalski et al. (1999)
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Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif

Kupferschiefer Spremberg: Claim, Resources, Composition
of Ore Body
Claim area and steps 1
Resources and composition of ore body 2
• Resources: 97.7 Mt polymetallic sulfide
ore: 1.5 Mt Cu; 2,680 t Ag;
161 kt Pb; 81.8 kt Zn
• Composition of ore body: hanging wall
22.9%, Kupferschiefer 45.7%, footwall
31.4%
1: © KSL Kupferschiefer Lausitz GmbH
2: cf. Kopp et al. (2006); Hennig et al. (1974)
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Exploration
seismics
Drilling exploration
(and feasibility study)
• Average ore content: 1.5 wt.% Cu,
34 g/t Ag
• Thickness of ore body: 0.8-8.2 m,
ø 2.4 m
• Depth of ore body: 800-1500 m
Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif

Page 10
Exploration Projects for Mineral Deposits in Germany
Mineralization Type
1. Polymetallic sedimenthosted
massive sulfidetype
(Pb, Zn, Cu, Ag, Au?)
2. Kupferschiefer-type (Cu,
Ag, Pb, Zn, Au?)
3. Sn-W(-Mo-Li) greisen-,
vein-, and skarn-type
4. Ag-rich base metal veintype
5. Ag-rich Bi-Co-Ni-As veintype
6. Fluorite and barite veintype
Location
exploration target
1 (4, 6)
3-6
Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif
2

Mineral Deposits / Occurrences of Erzgebirge-Vogtland Area
Sachsen-
Anhalt
Thuringia
Saxony
Czech
Republic
Poland
Source: modified after Lehmann / LfLUG Sachsen (2010)
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Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif

Current Mineral Exploration Projects in Saxony
Claim Area (Erzgebirge-
Vogtland region)
Company Exploration Data from
1920-1990 Available
Main Commodity
Seiffen BEAK Consultants GmbH minor Sn, W, Cu, Ag
Gottesberg Deutsche Rohstoff AG abundant Sn, W, Mo, Cu
Delitzsch (NW Saxony) Deutsche Rohstoff AG abundant REE, Nb, W
Niederschlag Niederschlag EFS abundant fluorite, barite
Zschorlau, Wolkenstein,
Brand-Erbisdorf
Sachsenerz Bergwerks
GmbH
minor - abundant Ag, Au, Zn, W, Sn
Ehrenfriedersdorf/Geyer Sachsenzinn GmbH abundant Sn, W, Li, Zn, Ag
Eibenstock , Kottenheide Saxore Bergbau GmbH minor Sn, W, Li
Zinnwald Solar World Solic. GmbH abundant Li, Sn, W
Marienberg-Süd Umbono Minerals &
Mining LCC
minor - medium Sn, W, In, Ag, Zn,
fluorite
Source: Claim areas and companies after SOBA Freiberg, status: 02/2012
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Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif

Location of the Zinnwald Li-Sn-W Deposit
ZINNWALD:
Sn-W(-Li) mining
since about 1378
until 1990 (→flatdipping
veins)
Metamorphic basement
Late-collisional granite
Post-collisional granite
Post-collisional high-
F rhyolite
Lamprophyre (dike,
stock, flow)
Sn, Sn-W-Mo-Li,
W deposit
Source: modified after Seifert & Kempe (1994); Seifert (2008)
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Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif

Li-Sn Greisen Ore Bodies Zinnwald
Tiefer Bünau adit, Zinnwald 1
Explanation
• Irregular lenses or zones, mostly flat dipping; thickness: up to 25 m
• Mineralization: quartz-topaz-Li-mica(zinnwaldite)-fluorite greisen
(+ cassiterite, wolframite, molybdenite)
1: Seifert (1994)
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Li-mica-rich greisen
@ 0.3 wt. % Li,
0.15 wt.% Sn
� Li-Sn ore
Historical Li-mica mining around
1940
(� greisen-type ores)
Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif

Li-resources of Greisen Deposits in the Erzgebirge
Greisen Deposit Li-content (wt%) Resources (kt Li)
Zinnwald + Cinovec 0.3 42 1 +112.8 2
Altenberg 0.12 33 3
Schenkenshöhe 0.25 35 3
Ehrenfriedersdorf
(greisen)
0.1 to 0.4 4 unknown
Gottesberg unknown unknown
For comparison: International important Li-pegmatite deposits 5
Greenbushes (AUS) 1.3 584
Tanco Mine (CA) 1.3 86
Bikita (ZIM) 1.4 51
1: Lächelt (1960) 4: Seifert (1983), Uhlig (1988)
2: Starý et al. (2009) 5: AIMR (2010); Manitoba Energy and Mines Economic Geology Report
3: GKZ (2008) ROHSA Study ER84-1, Kippenberger & Krauß (1988); cf. Seifert & Gutzmer (2010)
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Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif

Exploration Drills from the 1950’s and 1980’s in the
Zinnwald Ore Field
Evaluation of Metal Contents & Mineralogy by new Drills (2012)
Source: modified after Besser & Kühne (1989)
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Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif

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Encouraging Areas for Future Mineral Exploration Projects
in Germany (selection)
Areas
Location
• Lausitz massif (Ni-Cu-
PGE?)
• Thuringian Forest (fluorite,
barite, Au?, Ag?)
• Rheinisches
Schiefergebirge (SHMS,
Ag?, Au?)
• Black Forest (fluorite,
barite, Ag)
• Fichtelgebirge / Oberpfalz
(Sn, W, fluorite, Au?)
• Bavarian Forest
current exploration projects
Harz Mts.
Delitzsch
Erzgebirge
Spremberg
Member of Helmholtz Society
Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif