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Submitted on 10 Dec 2012
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Étude des minéralisations aurifères du District d’El Callao, Venezuela. Rôle de la remobilisation de l’or
”invisible” dans la formation du gisement.
German Velásquez
To cite this version:
German Velásquez. Étude des minéralisations aurifères du District d’El Callao, Venezuela. Rôle de la remobilisation de l’or ”invisible” dans la formation du gisement.. Géologie appliquée. Université Paul Sabatier - Toulouse III, 2012. Français. �tel-00763281�
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1 ND1
784F5867A
1
5A,E7E4D68E9A9F4A29A+69232789A64AFA54D87A,FD7D69A 1
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1
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1
The Guiana Shield
The Guaporé Shield
Guri Fault Orinoco River
Ciudad Bolivar
A
B
/(!(78($B
Pr Barama-Mazaruni
Supergroup
BB33
DD--
77
66DD
77AA
44
DD88
77
1 NO1
4518971.B199615671677B1D51786189D561B761B56,1
+ 4515C5198E51D!<9799"1677B1D515661D971578513F15713@1.9"198191 7ED510+-16B818E5177951:*7581"1NWFW;V1
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+ 4561897616D5798561DB1-E98%SB511
49198751DB178971.B19961B195B8519B1955%B5915671B516B61511DB1 78971D51.B91991:412;11
1
1 4121-8A561757B561DB178971D51.B91991:#!98F61&DD581571*5D%9"1NWWD;1
1
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Alluvium
Roraima Province (~1.7 Ga ) Cuchivero Province (~1.8 Ga) Undifferentiated Proterozoic
Supamo Complex Greenstone belts
Imataca Province (~3.7 Ga)
0 50 100 150
km BRAZIL
ORINOCO RIVER
1GUASIPATI-EL CALLAO GREENSTONE BELT
Pastora Province (~2.2 Ga)
EL CALLAO GOLD MINING
DISTRICT
GURI FAULT
1 NF1
6BA97151DF51D1 861 B81561655761D!(8B51D51!AB5671:*615719"1 NWW2;"13189D6171561D51655761,1
1
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1 2G1
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Colombia Mine, El Callao Mining District, Venezuela
(740 t)
1 2D1
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0 1 2 km
121233444433556677 8282998877
624,000 626,000 628,000 630,000 7
AA44BBCCDD77AA77
EB4BF387 3597
47E8448B7
Meta-basic rocks of the El Callao Formation
7
Meta-felsic rocks of the Caballape Formation
A
Gabbro and diabase
B
1 2W1 162,7 m
167,8 m
167,2 m 167,4 m
Lame mince Analyses chimique
20 cm
5 cm
7 cm Lame mince
Analyses chimique
20 cm
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Faille Santa María Faille Sur
Galeries d’exploitation
E
F
N
A
Faille Sur
Système Colombia Faille Santa María
43301-02 43303-04
43305-06 43307-
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50m
B
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Galeries
C
D
266 268
267 273
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Faille Sur
43336
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266 267-273 268
SO NE
50m
A B
Faille Santa María
Faille Sur
Système Colombia
43324 43325-26 43327-28 43329
43330-31
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Faille Santa NE María
Faille Sur
Galeries d’exploitation
A N B
A B SO
1 321
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Femtosecond (fs) Ti:Sapphire laser (Pulsar 10, Amplitude Technologies)
C C D TV
Near-infrared (NIR) femtosecond laser
Optics
Viewing Optics and Laser Imaging
He carrier
gas
Ar transport and cooling
gas Mirror
Objective NIR + visible
Reflected light Illumination
NIR- Reflecting
mirror
Transmitted light Illumination
Sample cell
~ 1 cm3
quadrupole
Agilent 7500ce, Agilent Technologies Low pressure
Interface ± DCR
ICP Mass Spectrometer
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