Mineral exploration in Germany - Deutsche Rohstoffagentur

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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


Page 2

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

Page 4

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)

Page 5

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

Page 6

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


Page 7

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)

Page 8

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)

Page 11

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

Page 12

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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)

Page 13

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)

Page 15

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)

Page 16

Member of Helmholtz Society

Thomas Seifert, Jens Gutzmer I Helmholtz Institute Freiberg for Resource Technology I www.hzdr.de/hif


Page 17

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

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