vetas ppt
DESCRIPTION
Presentación de PowerPoint sobre el enriquecimiento mineralogico, alteraciones, patrones estructurales y minería preexistente del distrito minero de Vetas (Santander)TRANSCRIPT
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PRES ENTATI ON
D I S T R I C T O F V E TA S – S A N T A N D E R R E G I O N , C O L O M B I A
UPDATE EXPLORATI ON VETAS PROJ EC T
F E B R U A R Y 2 0 1 1
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Exploration
FOCUSED
Mining District of Vetas
Santander Region
Past & Present
- Source of gold production from pre-Colombian
times.
- Gold Operations operated by local miners.
Today (CB GOLD)
- Eight Properties Acquired 100%
- Acquisition in process: five properties (891 ha)
Near-Middle Term
- Small scale production being evaluated.
- Continue evaluation of other properties (district).
Vetas District
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Vetas – Exploration
TARGETS
Veins System(Underground Workings located in 9 claims)
-Consists of high grade low
sulphidation epithermal veins.
-Approximately 6,000m underground
workings developed, of which 5,000m
is currently accessible for exploration.
-Mapping and Rock Sampling (surface
and underground) undertaken by CB
Gold from September 2009 to date.
POTOSI MINE
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Vetas – Geological Sett ing
LOCAL GEOLOGY
A) Precambric Gneiss
-Metamorphic rocks (PBG)
related to Bucaramanga Gneiss,
consist of banded-quartz,
feldspar, hornblende and mica
gneisses.
-Hosts c.90% of the vein systems.
B) Intrusive Rocks
-Diorite to granitic composition
(Jurassic-Triassic) rocks intrudethe older basement rocks.
Younger intrusives maybe of
Tertiary age (such as Real Minera
property).
-Hosts c.10% of the vein systems.
INTRUSIVE ROCKS
PRECAMBRIC GNEISS
PRECAMBRIC GNEISS
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Vetas – Structural
1. STRUCTURAL CONTROL
The fracture system controlling
mineralization and alteration (veins
system) appears to be related to the
regional scale N30E and N60W
trending fault systems.
2. VEINS & SHEAR ZONES (SPLIT)
Au-Ag mineralization observed to date occurs
N30E, N40-60W and EW striking, vertical to sub-
vertical dipping to the north, along the quartz
veins and together with shear zones are hosted
in the metamorphic gneiss and intrusive rocks.
SUBVERTICAL QTZ VEINS
QTZ VEINS (SPLITS)
GNEISS
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Vetas – Structural
3. FAULTS & LINEAMENTS
The properties are part of the Vetas
Mining District where the small
mines and targets in the District are
concentrated along two blocksseparated by two small streams:
Cutac and Volcan, main lineaments
associated to faults related to
trending vein system (N30E, N40-
60W, EW).
The Northwest striking Cutac andVolcan fault zones appear to be the
principal structural controls on
mineralization in the Vetas and
Reyna de Oro areas respectively.
INTRUSIVE ROCKS
BLOCK 1
BLOCK 2
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Vetas – Structural
4. MINERALIZED BLOCKS
BLOCK 1:
Located to the west side of Cutac Stream,
related to El Dorado, La Providencia and
Trompeteros mines with N30W and EW
strike dipping to the north, with
geochemistry and high gold and silver
grades in each level indicating a down-
thrown block. Irregular presence of Cu, Pb
and Zn anomalies.
The preliminary interpretation indicates a
block which is higher up in the originalsystem and therefore been less eroded,
where lower levels can indicate the
presence of polymetallic + Au in economic
grades.
INTRUSIVE ROCKS
BLOCK 1
BLOCK 2
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Vetas – Structural
4. MINERALIZED BLOCKS (Contin.)
BLOCK 2: Located between the Cutac and Volcan
streams and to the north by the El Salado
stream, Block 2 contains the Potosi, Los
Delirios, La Peter, Santa Isabel, RealMinera and San Antonio mines. Veins
have N30E and N40-60W strike, all
dipping to the north. Block 2 is upthrown
and geochemistry results show Au-Ag
high grade values with Cu, Pb, Zn and Mo
anomalous results.
Intrusion of granitoids rocks over thegneiss makes San Antonio property the
upper level; Reyna de Oro and intrusive
rocks the upper-middle level and Real
Minera, La Peter, San Bartolo, Chitarero,
Los Delirios, Tesorito and Potosi veins an
intermediate level.
INTRUSIVE ROCKS
BLOCK 1
BLOCK 2
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Vetas – Structural
5. POTENTIAL
Block 1
Below the Au-Ag level there is strong
potential related to Au-Ag-Cu-Pb-Zn
levels mineralisation.
The immediate potential is along
strike SW containing veins with
N30W strike and dipping to the
north.
INTRUSIVE ROCKS
Au-Ag-Cu-Pb-Zn
Au-Ag
Au-Ag
BLOCK 1
BLOCK 2
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Vetas – Structural
5. POTENTIAL (Cont.)
Block 2
This block has different levels where the
potential for further success is: below the
Au-Ag upper-intermediate level, the
stockwork zone, below the intemediatelevel which includes the San Bartolo,
Tesorito, Chitarero, Real Minera, La Peter,
Los Delirios and Potosi mines with Au-Ag-
Cu-Pb-Zn-Mo ocurrence potenial over
about 500m vertical.
The immediate potential is along the SE
strike
INTRUSIVE ROCKS
Au-Ag-Cu-Pb-Zn
Au-Ag
Au-Ag
BLOCK 1
BLOCK 2
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Vetas – Stockwork
Stockwork (Disseminated bulk tonnage lower grade Au target)
- In Pre-Colombian times it was worked by the indigenous Sura, and then by the Spanish
through small open pits over the stockwork, known locally as Pozo del Rey or La Araña.
-Sampling each 50m of on surface shows significant anomalous Au values in both intrusive
and the surrounding gneiss stockwork (Real Minera)
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Vetas – Stockwork
Stockwork (lower grade – Au)
- Consists of quartz-FeOx, white quartz and FeOx-quartz-pyrite multi-directional veinlets.
- Width from 1 to 5 cm and argillic and supergene alteration. Zone is 600m x 300 x 300m.
- The principal mineralization is associated with FeOx-Qtz-Py at surface with gold high
grades.High grades in Gold mineralization into the stockwork
Surface Rock Sample 50720: 1.53 g/t Au UG Rock Sample 21076:4.56 g/t Au
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Real Minera – Dri ll ing Program
S40W STRIKING – ORIENTATION DRILL HOLE
Objective: Stockwork &Veins
S25E STRIKING – ORIENTATION DRILL HOLE
Objective: Veins
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Exploration – Vetas District
Intrusive – Stockwork & Veins zone
Gneiss – Veins zone
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La Vereda - Geology
GEOLOGY
La Vereda project shows
outcrops of schists,
paragneisses, metasedimentsrelated to Precambric
Bucaramanga Gneiss (PBG)
and roof pendants of
sandstones of Silgara
Formation, within Paleozoic
Orthogneiss Formation (POF).
The ocurrence of gabbro (Gb)
related to Paleozoic plutonic
event and quartz diorite (QD)
associated to early Mesozoic
characterize the project.
CB Gold
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La Vereda - Geology
STRUCTURAL
Shears zone with N50E trend
and duplex structures.
Mineralized Trend: Three
trends N50E:
1. North West
Lenght 2 Km (1.4 km
inside to Paramo Rico
tenement), width 0.5 km
2. Central
Lenght 2 Km , width of
0.25 km
3. South East:
Lenght 1.2 Km, width
0.25 km
1
2
3
CB Gold
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Exploration – La Vereda Target
La Vereda
Space to Build (600 has)
Target hosts geophysycal anomalies along strike of
surface gold veins
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Environmental & Social Responsibility