Chilcobija Tif
March 23, 2024 | Author: Anonymous | Category: N/A
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Limolitas, areniscas con lutitas intercaladas Siltstones and sandstones with intercalated shales
Fm. Marquina Marquina Fm.
Areniscas gris verdosas con limolitas y lutitas intercaladas Greenish gray sandstones intercalated with siltstones and shales
Fm. Angosto Angosto Fm.
Oag
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fragmentos pumíceos
∞
índice de aplastamiento
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líticos volcánicos
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sedimentary lithics diameter
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Tefrifonolita
10
Fonotefrita
Foidita Tefrita Basanita
5
Traquita
Picrobasalto
0 35
Traquiandesita X Traquiandesita >G ! Traqui- basáltica basalto Andesita basáltica
Basalto
45
DIAGRAMA AFM
permiten clasificarlas como traquiandesitas basálticas, andesitas, dacitas y traquidacitas (Diagrama TAS). Localizándolas además en el campo de las rocas calco-alcalinas ricas en K (Diagrama AFM), los cuales constituyen características de volcanismo asociado a la zona de subducción.
FeO*
Riolita
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9759
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W>
E *k "
_ g
#
Dacita
65
75 Irvine & Baragar, 1971
* # g "
GEOLOGIA ECONOMICA. En el área este se destacan los yacimientos filonianos de
W X
origen hidrotermal hospedados en rocas sedimentarias, con mineralización Sb y Au (Chilcobija, Avaroa, Candelaria), polimetálicos: Sn, Pb y Zn (Santo Domingo, Trapiche). Mineralizaciones de Au desarrollados en yacimientos hidrotermales se encuentran en las minas Chilco y Sucre. En el estratovolcán Azulejos, (Galán y Lipina) existen mineralizaciones portadoras de Bi, W, Pb, Ag y Au en yacimientos filonianos de origen hidrotermal emplazados en rocas volcánicas y asociados a silicificación, argilitización y propilitización. Placeres de Au detrítico se encuentra en los lechos de los ríos Kollpa Mayu, Santa Isabel y sus tributarios. Los principales distritos y la mineralización que los caracteriza se encuentran señalados en el cuadro de Ocurrencias Minerales.
(
Toleítico
E k
_
^ > !
F
G
G
F
Calcoalcalino
G
W ^
F
( "k _ * F g># E
X
> ! >
Na 2 O + K 2 O
MgO
Cb-221 Cb-222 Cb-223 Cb-224 Cb-225 Cb-226 Cb-253 Cb-254 Cb-255 Cb-256 Cb-258 Cb-262 Cb-263 Cb-359 Cb-365 Cb-383 Cb-384 Cb-385 Cb-402
Zona de alteración
Alteration zone
Sitio de muestreo
Sample location
a) para análisis petrográfico/mineragráfico
a) for rock and/or ore microscopic analysis
b) para análisis químico de elementos mayores
b) for chemical analysis of major elements
Mina
Mine
B
a) activa
a) active
b) inactiva
b) inactive
Fósiles
Fossils
invertebrados
invertebrates
Línea de perfil geológico
Geological cross section
! ! !
! ! ! !! !
! ! ! !
! ! !
x 3390
) "
Río
River
Río intermitente
Intermittent stream
Curvas de nivel (con intervalo de 100 m)
Contours (100 m interval )
Altura o cota
Elevation
Población importante
Village / Town
Camino de tierra
Unpaved track
! (
! (
! (
66°30'
! (
! (
F - 21 M - 62 KUCC
! (
! (
F - 22 M - 65 KUCC
10335
! (
11325
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11320
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11425
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11640
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F - 23 M - 71 KUCC 21°30'
11320
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! (
11430
) "
CIENEGUILLAS
) "
MINA CHILCOBIJA
) "
CERRILLOS
21°30'
21°30'
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11635
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11630
66°0'
) "
MINA CANDELARIA
F - 25 M - 73 KUCC
! (
21°40' 66°15'
VILUYO
!F - 24 ( M - 71 KUCC
OCURRENCIAS MINERALES MINERAL OCCURRENCES
)
Metálicos
Sb Bi
Au Pb Zn
Ag Sn W
/ / Oro nativo / Galena / Esfalerita / Argentita / Casiterita / Wolframita / Estibina
Bismutina
) "
21°40'
SANTA ISABEL
21°40'
66°30'
66°15'
66°0'
Metálico aluvial Oro
/
Programa Carta Geológica Nacional 2010 SERGEOTECMIN Información anterior a 2010
Stibnite
Bismuthenite Native gold Galena
Sphalerite Argentite
Cassiterite
Wolframite
Gold
BRIEF GEOLOGICAL DESCRIPTION
TECTONIC SETTING. In the Upper Ordovician, the Ocloyica tectonic phase controlled
66°0'
FUENTE DE INFORMACION / SOURCE OF INFORMATION
3000
ANDEAN CYCLE (Lower Triassic – Present) Sedimentites, related to this cycle, outcrop at W part of the area. These overlie with angular unconformity to the Paleozoic rocks. The sedimentation started with Potoco Fm. (c 1500 m), conformed mainly by liotofacies of pelites deposited in a fluvial continental environment of meandering – type facies, these associated construction of wide foreland basin and related to active and compressive period of upper Oligocene. Which caused the psefites and debris flow depositation correspond to alluvial fans of the San Vicente Fm. (c 700 m). Transitionally overlie the pelites, psammites, and volcanic agglomerates facies of the Esmoruco Fm. (c 600 m). An andesitic – basaltic lava colada is disconformity to the rest sedimentary units of the area, and It corresponds to the Rondal event (100 m) [21.4 ± 0.1 Ma (3)], related to calcalcaline volcanic activity with regional distribution. In the eastern part of the area, in unconformity relation were deposited the fluvial – lacutrine facies of the Nazareno Fm. (c 120 m), related to piggy back basin. Later, in the SW of the area, the volcanic activity were reinitiated at the Lower Miocene, with pyroclastic deposits related to the Torrelaire 2 Tuffs (c 150 m) [17.8 ± 0.4 Ma (4) - 16.1 ± 0.5 Ma (5) - 15.7 ± 0.6 Ma (5) - 15.2 ± 0.5 Ma (3)]. They overlie to the Esmuruco Fm, and constitute also volcanoclastic and pyroclastic units with dacitic composition. The volcanic activity was continuous with the construction of Azulejos Estratovolcano, with dacitic and andesitic lava coladas, related to the series dacitic subvolcanic intrusions, denominated Lipina Domes. In the NW part of the area, a volcanism of fissure type permitted the development of Tres Cerrillos Tuffs, with dacitic composition, and they overlie with disconformity to the Fms.: San Vicente and Potoco, The effusion continuous with Tres Cerrillos, Tholoma, and Cerrillos Lavas, with dacitic to andesitic composition. The magmatism events of the area ended with an isolated volcanic manifestation of Tangani Dome of dacitic composition.
66°15'
) "
11420
! (
TACSARIAN CYCLE (Upper Cambrian – Upper Ordovician). This cycle started in the area, during the Llanvirnian times with the marine deposits of a continuous thick sequence and turbidites, very deformed and silicified. The Marquina Fm. (c 1100 m), is the first component of this sequence conformed by turbidites, psammites, and pelites related to self shallow marine environment. Transitionally overlie the pelites of the Angosto Fm. (c 1200 m) this are associated to subsident events of middle shelf environment. The sequence are continuous with the pelitic deposits and marine sinsediemenatry slumps of the Kollpani Fm. (c 900 m), this unit is also related to self environment. Above this series developed the facies with psammites and pelites intercalated of the Tapial Fm. (c 1000 m), with primary sedimentary structures that indicate an variable environment from tidal facies to coastal.
F
(
Andesita
55 SiO 2 (%wt)
PETROLOGIA. Los análisis químicos realizados en las rocas volcánicas del área,
Traquidacita^
G
Na 2 O + K 2 O (%wt)
la sedimentación de la cuenca ordovícica presentes en el área y originó una deformación sinsedimentaria de la misma. Posteriormente los efectos tardíos de la fase Eohercínica afectaron las rocas ordovícicas con un cizallamiento y un epimetamorfismo debil. La ausencia de depósitos sedimentarios en los períodos Silúrico-Jurasico supone la presencia de uno o más altos topográficos, la sedimentación se reinicia durante el Maastrichtiano con la Fm El Molino, aflorante con el área vecina Esmoraca. A partir del Eoceno se genera el desarrollo de una cuenca de antepaís, vinculada a un régimen compresivo del Oligoceno Sup. que ocasionó el acortamiento de la cuenca y permitió el desarrollo de una faja plegada de dirección NNE-SSW y el desarrollo de la Falla San Vicente, tuvo un componente transpresivo durante y después de la depositación de la Fm. Esmoruco, lo cual se refleja en el plegamiento N - S de las Fms. Potoco, San Vicente y Esmoruco. Como consecuencia de los movimientos de la fase Quechuana se originaron en el Altiplano Sur varios dominios tectonoestratigráficos limitados por fallas regionales. En este mismo período, se desarrolló una secuencia de corrimientos del tipo piggy-back permitiendo la depositación de la Fm. Nazareno en el ámbito de la Cordillera Oriental. El desarrollo aislado de la actividad magmática del área se halla vinculado a los procesos de actividad volcánica del arco, los cuales evolucionaron desde el Mioceno Inferior y corresponden a un magmatismo de trasarco.
F
MARCO TECTONICO. Durante el Ordovício Sup., la fase tectónica Oclóyica controló
Thermal spring
RELEVAMIENTO GEOLOGICO Y TRAVESIAS LOCATION OF GEOLOGICAL FIELD SURVEYS 66°0'
! (
! (
21°30'
3000
Oag
The Chilcobija area located at the South part of Bolivia, between W border of the Eastern Cordillera and E border of the South Altiplano. It presents a geochronology of sedimentary rocks of Upper Paleozoic (Atocha Segment, 2), Paleogene, and Neogene. The Paleozoic rocks are related to back arc and/or foreland environment; the Paleogene rocks were developed in continental basins limited between Eastern Cordillera and the volcanic arc (External Foreland). Finally, the neogene deposits correspond to piggy back basins. The geochronology history of the area is complemented in the Miocene, with the effusive process which have created volcanic deposits, associated to the Azulejos estratovolcano.
Fonolita
G
CICLO ANDINO (Triásico Inf. - Presente). Al W del área afloran sedimentitas asignadas a este ciclo, que sobreyacen discordantemente sobre depósitos del anterior. La sedimentación se inicia con la Fm. Potoco (ca 1500 m), con litofacies principalmente pelíticas depositadas en ambiente continental fluvial del tipo meandriforme, sedimentación asociada a la edificación de una amplia cuenca de antepaís y vinculada a un periodo activo y compresivo durante el Oligoceno Sup., los cuales originan la depositación de conglomerados y flujos de detritos correspondientes a abanicos aluviales de la Fm. San Vicente (700 m). Transicionalmente sobreyacen pelitas, areniscas y aglomerados volcánicos de la Fm. Esmoruco (ca 600 m). Una colada de lavas andesítico - basálticas, discordantes a la anterior unidad, caracterizan al Evento Rondal (100 m) [21,4 ± 0.1 Ma (3)], asociada a una actividad volcánica calcoalcalina, con distribución regional. En la parte oriental del área y en relación discordante se desarrollan depósitos fluvio-lacustres de la Fm. Nazareno (ca 120 m), con litofacies características asociadas a cuencas intramontanas. Posteriormente, en el sector SW, la actividad magmática se reinicia en el Mioceno Inf. con los depósitos piroclásticos, correspondientes a las Tobas Torrelaire 2 (150 m) [17,8 ±0,4 Ma (4) – 16,1 ± 0,5 Ma (5) – 15,7±0,6 (5) -15,2±0,5 Ma (3)], sobreyacen a la Fm Esmoruco, y constituyen además, unidades volcanoclásticas y piroclastitas de composición dacítica. La actividad volcánica continúa con la edificación del Estratovolcán Azulejos, coladas de lava dacítica y andesítica, asociada a una serie de intrusiones subvolcanicas de composición dacítica denominadas Domos Lipina. En el sector NW del área, un vulcanismo de tipo fisural desarrolló las Tobas Tres Cerrillos, de composición dacítica, sobreyacen discordantemente a las Fms. San Vicente y Potoco. Continúa con las efusiones de las Lavas Tres Cerrillos, Tholoma, y Cerrillos de
15
Fuente termal
pyroxene
10340
! (
¢
CICLO TACSARIANO (Cámbrico Sup.-Ordovicico Sup.). Este ciclo se inicia en el área durante el Llandeiliano, con los depósitos marinos de una potente secuencia continua y turbidítica, muy deformada y silicificada. La Fm. Marquina (ca 1100 m) es la primera unidad de la indicada secuencia, conformada por facies turbidíticas, psamitas y pelitas, vinculadas a una ambiente marino de plataforma somera. Transicionalmente sobreyacen las pelitas de la Fm. Angosto (ca 1200 m), asociados a eventos subsidentes de plataforma marina. La secuencia continúa con los depósitos pelíticos y presencia de deslizamientos sinsedimentarios marinos de la Fm. Kollpani (ca 900 m), también vinculados a un ambiente de plataforma. Hacia el tope de la serie, se desarrollan las facies de psamitas y pelitas intercaladas de la Fm. Tapial (ca 1000 m), con presencia de estructuras sedimentarias primarias que sugieren un ambiente marino que varía entre tidal a costa.
composición dacítica a andesítica, el evento culmina con el domo Tangani de composición dacítica, y corresponden a una manifestación volcánica aislada.
Glacial cirque
piroxeno
9765
! (
Au
El área Chilcobija, ubicada al sur de Bolivia, entre el borde W la Cordillera Oriental y el borde E del Altiplano meridional, presenta una geocronología de rocas del paleozoico Sup., segmento Atocha (2); del Paleógeno y Neógeno. Las unidades paleozoicas están vinculadas a un ambiente de trasarco y/o antepaís; las unidades paleógenas se desarrollaron en cuencas continentales limitados entre la Cordillera Oriental y el arco volcánico (antepaís externo), finalmente los depósitos neógenos corresponden a cuencas intramontanas. La historia geológica del área, se complementa en el Mioceno, con procesos efusivos que han originado depósitos volcánicos, asociados al estratovolcán Azulejos.
Circo glaciar
olivine
66°15'
9770
)
LeBas et al. 1986
Landslide scarp
lenght (PF and fiammes)
No están registrados los sedimentos cuaternarios por razón de escala. Quaternary sediments are not registered due to the scale.
DIAGRAMA TAS
Escarpe de deslizamiento
olivino
largo (PF y fiammes)
2000
RESEÑA GEOLOGICA
! !
! ! !
INDICE DE VUELOS INDEX OF AERIAL PHOTOGRAPHS
4000
ESCALA HORIZONTAL Y VERTICAL: 1:100.000
c) structural lineament
810
SERVICIO NACIONAL DE GEOLOGIA Y TECNICO DE MINAS PROGRAMA CARTA GEOLÓGICA NACIONAL
Oko Oag
c) lineamiento estructural
21°40'
5000
Oag
Oma
b) reverse or thrust, with teeth on uplifted block
biotite
m.s.n.m.
Oko
b) inversa o cabalgamiento: la dentadura indica el bloque elevado
Elaborado por: / Elaborated by:
Cº Quimsa Cruz
(
a) inferred
flattening ratio
B'
(
a) inferida
3500
0 360 3606
B
v
Fault
Sin relación de escala No scale proportion
66°30'
Cº Rodas
Falla
3200
21°40'
Qda. Jalsuri
b) inferred
O
! (
Nes
b) inferido
A
2000
5000
a) with direction of plunge
N
00
2000
m.s.n.m.
a) con dirección de hundimiento
SIMBOLOS TOPOGRAFICOS TOPOGRAPHIC SYMBOLS
5000
Oag
Syncline
A'
Areniscas y limolitas gris verdosas a gris oscuras Greenish gray to dark gray sandstones and siltstones
m.s.n.m.
Oko
Sinclinal
CB-227
I
A'
Oko
b) inferred
Reddish to violaceous-brown sandstones, intercalated with reddish claystones and polymictic conglomerates
Lutitas y limolitas gris oscuras con niveles de areniscas gris claras Dark grey shales and siltstones with light grey horizons of sandstones
Oko
Nnz
0
59
4168 Chaupi Loma
b) inferido
A
Fm. Tapial Tapial Fm.
Φ
4000
Rio C hich all a 00
38
41
60
a) with direction of plunge
Areniscas rojizas y marrón grisáceos intercaladas con arcillitas rojizas y niveles conglomerádicos polimícticos
Fm. Potoco Potoco Fm.
Otp
A
Qda. Challviri
(
(
LS
3500
Ch
36
00
00
4000
as a
36
R io
35
(
(
(
(
0
45
330
0
Ncel
(
(
340
Nnz
0
a) con dirección de hundimiento
X CB-221
Conglomerados polimícticos, rojizos a violáceos y areniscas conglomerádicas. Niveles de arcillitas rojizas y conglomerados con clastos subvolcánicos Reddish to violaceous polymictic conglomerates and conglomeradic sandstones. Reddish claystones levels and conglomerates with subvolcanic clasts
Fm. San Vicente San Vicente Fm.
40
Cº Rancho Orkho
Ncel
v
(
(
v
00
60
40
Anticline
REFERENCIAS / REFERENCES
PERFILES GEOLOGICOS GEOLOGICAL CROSS SECTIONS
5000
Fm. Esmoruco Esmoruco Fm.
Ppo
T
SUP.
v
v v Nes v v
34
00
410
55
30
65
41
4224 Cerro Khellu Khellu
60
4200
410
0
53
Ri oT om
3500
3800
Nn z
ch a Ca n ca In a
W ay kh o
ra d
Mu
3700 80 40
R io M i l l u y o j
v
v
OC LO Y ICA
O
Anticlinal
é
00
00
4000
40
Qu eb
40
4000
ha ca ya
00
ra da
S 4000 4100
00 42
3800
38
Q
a
Que br a d
4000
ad aT ajo
br 00
40
4000 0
00
40
cf
00 44
n Mo jo
Rio
Rio Grande
R i o G r a nd e
M ara
y
0 372
4100
a 00 38
R io
ue br
Q
4000
41
00
R
H u ra y
Qu eb rad a Vol can
00 45
Rio C
4000 00 39
Qc f Pp o
Q
O ag
u na
R ío 4300
20
00
44
0
410
hic ur
4200 00 42
aC al
Ag u
Quebrada
400
4000
4100
00
00
41
Lag
Q ueb rada Por tillo
Q ue
ra d a
Q ueb
ta M uer
e g ra
R ío N 0
41
ío
R
Qu
0
420
00 43
4300
Quebrada Juskho Chakha
Q
00 41
s a ra
Q
0 420
420
5200
00 50
4800
00
Q ue
4600
Ro d eo R ío 0 444
00 44
Qt
20 44
00 44
Ps v
00 46
4100
0 430 00 43
a
nc
4200
4300
00 45
Río Iglesia C u ev a
Nes
ió n
Río Fundic
4400
44
es N
Nes
Q ue
00 43 00 43
0 470
v
v
PALEOCENO
INF.
Strike and dip of bedding
¡
Arcillitas, areniscas arcillosas rojizas a anaranjadas y conglomerados polimícticos Reddish to orange claystones, clayey sandstones and polymictic conglomerates Areniscas, arcillitas y conglomerados marrón violáceos. Lavas porfiríticas gris violáceas verdosas y gris oscuras. Andesitas basálticas de ol y Andesitas de px. Violaceous brown sandstones, claystones and conglomerates. Violaceous gray to greenish gray and dark gray porphyritic lavas. Basaltic andesites of ol and Andesites of px.
v
3300
go
00
47
35
00
0
20
0
4126 Cerro Irupampa
41
450
41
ha C a nc u ca aP ad br ue Q
Qu
0 420
4100
4500 00 45
00 44
4600
00
46
00
47
4100
00 41
Rí o
4400
T
da
eb ra
h
Kh ak
ra d a
Que b
Ps v
00 41
4200 39 80
4400
v
7610 000 m. N.
v
v
I
v v Nnz v v
! (
m.s.n.m.
v
v
v
EOCENO
v
66°30'
A
v
v
0
Depósitos de flujo de pómez, gris blanquecinos, soldamiento parcial, PF: ~ 2 - 5 cm, LV: Φ 1 - 3 cm, ∞ 2:1 Dacitas de bt. Conglomerados volcánicos gris violáceos con clastos de lavas andesíticas Whitish gray pumice flow deposits, partial welding, PF: ~ 2 - 5 cm, LV: Φ 1 - 3 cm, ∞ 2:1 Dacites of bt.Violaceous gray volcanic conglomerates with clasts of andesitic lavas
v
460
Ntlt2
Tobas Torrelaire 2 Torrelaire 2 Tuffs
v
4900
Lavas porfiríticas gris verdosas laminadas. Dacitas de bt. Ligth gray porphyritic, laminated lavas. Dacites of bt.
ni
00
5000
Estratovolcán Azulejos Azulejos Stratovolcano
v
v
OLIGOCENO
C C
v
INCAI CA
I
Rumbo y buzamiento de estratos
B
Naze
v
v
v
Santo Dom in
v
448,3
O
v
00
Lavas porfiríticas gris oscuras a gris verdosas, bandeamiento fluidal. Dacitas de bt. Dark gray to greenish gray porphyritic lavas, flow banding. Dacites of bt.
Fm. Nazareno Nazareno Fm.
F
!
C
Nlid
Domos Lipina Lipina Domes
N
V
25º
!
I
18 33
O
Lavas porfiríticas gris oscuras, bandeamiento fluidal. Andesitas de bt. y dacitas de bt. Dark gray porphyritic lavas, flow banding. Andesites of bt. and dacites of bt.
O
R
O
inferred
!
50
D
O D
inferido
!
B'
E
Lavas Tholoma Tholoma Lavas
Lavas porfiríticas y afaníticas gris oscuras, bandeamiento fluidal. Dacitas y andesitas de bt. Dark gray porphyritic and afanitic lavas, flow bandin. Dacites and andesites of bt.
I M
Lavas afaníticas gris oscuras, bandeamiento fluidal. Andesitas de px. Dark gray aphanitic lavas, flow banding. Andesites of px.
Lavas Tres Cerrillos Tres Cerrillos Lavas
Ntcl
M
E
Geological contact
!
O
v
420
45
Intervalo de curvas de nivel: 100 m Proyección: Universal Transversa de Mercator Datum: WGS 84 Zona 19 Sur Adaptación y base: CARTA NACIONAL - BOLIVIA Hojas topográficas: 6329 I, II, III y IV INSTITUTO GEOGRÁFICO MILITAR
10 Km
Z
v
55
4200
66°10'
Qa
40
4489 Cerro Vicuña Orkho
7610
25
30
O
21°35'
v
62
E
00
Nthl
v
72
24
Rio
15
410
55
35
v
P uju
00
v
Qd
i
37
N
v
41
4226 Cerro Farellon
Rio
chan
00
42
9
is c a
4180
00
42
ada V
Nnz
4206 Cerro Ovejeria
P A
3400
80
443,7
QUECHUANA
v
87
55
40
74
O
L
55
Nnz 77
da Jatun Jara
Nnz
v
60
0
Nnz
e bra Qu
E
N
65,5
v
41
28
4300
790
3988 Puca Loma
I
U
O
G
Cantos, gravas, arenas, limos y arcillas Pebbles, gravel, sand, silt and clay
Lavas Cerrillos Cerrillos Lavas
I
O
Nnz
v
45
e
I N F
Ncel v
57
00
d ra n
00
Q ue br
00
0
aC
sG rillo h or
S U P
S
O
Contacto geológico
D
N
E
Nnz
Dep. de terraza Terrace dep.
v
41
Qd
ad eb r
Nnz 40
P L I O C E N O
C
N
Bloques y gravas Boulders and gravel
E
E
G
Gravas, arenas, limos y arcillas Gravel, sand, silt and clay
C
O
O
Bloques, arenas y limos Boulders, sand and silt Cantos, gravas, arenas y limos Pebbles, gravel, sand and silt
Dep. coluvial Colluvial dep.
Qt
N
Deslizamiento Landslide
SIMBOLOS GEOLOGICOS GEOLOGICAL SYMBOLS
Cantos, gravas, arenas, limos y arcillas Pebbles, gravel, sand, silt, and clay
Dep. coluvio-fluvial Colluvial-fluvial dep.
v
00
50
Qu
3400
40
i
Ri o Pie dra Bla nca
4200
Ppo
55
Nnz
00
Qc
O
L
co
llan At u
39
S
N
A
ay
Nnz
420
Qcf
I
P
Nnz
50
00
72
4300
Ppo
43
a
4148
h u ch u
Nnz
0
5
O
36
nde
da K
408
Qu eb r
Qd
C
23,0
KUCHU
00
41
3800
Nnz
4200
Rio P
38
21°30'
3
45
O
7620
Qa 00 4
W rt a ue 0 o H 330
63
Qt
00
4200
Gra am pa
a eb r Qu
70
60
23
Qd
16,2
3500
3500
00
50
30
55
40
cu
4312 Cerro Tambillo
Otp
60
Qt
Nnz
3700
38
410
Q
45
30 20
25
Oko
da br a ue
Qt
Ri
0
3
3900
0 80
75
60
60
I
O
R
E
39
49
75
4500
ESTANCIA 40 ZAPATERA
3900
70
0
40
Sb,Au
Mina Toledo
0
30
00
410
15
ha
00
340
3900
4000
aykho Chi co aW
21
Mina Luis Ortiz
20
Mina Sausalito
75
Canc
Cab ra
A'
ert
45 85
j
60 Rio Za p
rada
u VH
al lay o
45
35
45
A
Arenas de grano fino Fine grained sand
Dep. de abanico aluvial Alluvial fan dep.
Qaa
T
N
N
Qd
E
R
O
I
00
00
41
20
00
da
Ar
11,0
35
41
4193
55
41
65
37
37
74
85
4084
Rio Huer t a
ESTANCIA PIEDRA BLANCA
0
75
L
Dep. eólico Eolian dep.
Dep. aluvial Alluvial dep.
Qa
P
Qt
42
60
Q ueb
23 18
00
o
4022
400
ra da
27
37
58
62
48 42
76
00
A
2,6
Z
00
ue b
R
e rta Waykho io H u
42
luy
Nnz
53
50
45
N
00
70
00
Vi
4000
8
3700
Qcf
4366 Cerro Toro Huma
00
6572
40
75
4568 Cerro Santo Domingo
Ri o
Nnz 40
00
50
38
3 38 880 00
4180
62
40
70
4000
0
30 Q
48
4400
4008
60
60
38
Mina Candelaria
a
21°25'
5,3
PAJCHI
h ani
30
Nnz
7630
3,3
Nnz
410
de la ri
E
Qt
40
63 42
Sn,Zn,Pb Mina Santo Domingo
23
00
70
42
Mina Sucre
20
iri ll v ha
C an
55 40
37
Nnz
is c a c da V
bra da
10
4586 Cerro Quimsa Cruz
3700
0
38
e b ra Qu
68
50
0
58
38
ta hi
55
P
A
69
Qc
75
ra da
3900
418
25
25
00
Nnz
48
4000
C
48
Qa
28
380
Oag Q ue
45
eb
35
75
00
4514
3800
4000
00
00
43
a
Oko
Nnz
75
Oag
36
a
0
00
U
Qe
v
0
40
400
0
Nnz 58
eb
HOLOCENO
T
C
COLUMNA CRONO-ESTRATIGRAFICA CHRONOSTRATIGRAPHIC CHART
M M M
400
00
0
Mina Socorro
380
3800
00
78
43
7
4000
420
450
6
f Qc
nt
4000
0
38
3832
Mina Cinco Amigos
42
35
3900 390 0
00
3800 3700
ra
5
40
65
Nnz
360
Lla
Qu
00
Nnz
oj
00
e at
4
00
M illu y
42
eb
45
4000
0
3
60
40
75
50
450
2
40
3900
0
0
1
55
00
da ra
n lla Pa
350
0
65
Qu
3800
llana
Qu
kho Way
a sa aT rad
38
22 31
33
21
4108
Mina Rosita 38
4400
3600
0.5
38
00
00
00
4034 Cerro Khara Huarcuñaloma
70
39
00
70
Oma
39
39
3700
Nnz
Oko
rada
l a n t a Pa
Escala / Scale : 1:100,000 1
55
Nnz
4000
73
48
3900
o
00
0
66°15'
00
54
C
C
65
4034
0
58
3800
E
otrero
67
50
63
b Qu e
37
L rad a u eb
430
450
36
Qcf
Qa
43
4516 Cerro Calvario Punta
Qcf
Ppo
40
br
0
38
4428
4200
Qa
0
70
4100
44
on M oj da
380
37
00
00
42
22
35
25
00
Ppo
80
a mp Pa
41
60
35
4300
3700
38
40
780
Qt
Qt
Qcf
Qc
0
55
60
00
Ppo
4000
38
00
Qc
4600
4100 410 0
de r an
Qc
0
G ra
Qcf
4966 Cerro San Pedro
4900
cf
40
o kh ay W
410
43
Q
j
Mina Khasayoj
Bi,W,Au
5347
Kh Ppo R ío
yo a sa
412
Pp o
40
lu tu n a ada L
Rí
Q
58
52
00
Qcf
ESTANCIA CERRO CHICO
00
Qcf
Qcf
63
4044 Mina Challviri Zn,Pb,Ag
60
0
4222
0 40
27
47
43
00
aP r ad eb Qu
Ma
3900
E R A
3700
Nnz
4000
rta
0
Au,Sb
Qcf
410
40
00
60
60
0
4016
70
45
ue H
67
4426
Ppo
R ío
60
00
450
Ppo
400
4056 Cerro huaylla Punta Loma
00
4200
0
00
a ad
Qcf
41
40
Mina Chilcobija Sb,Au
72
53
42
73
44
45
Q ue
0
0 420 4220
00
0
41
Oag
4296 Cerro El Quemado
ño ta 34 on M
00
00
55
uan a
Oag
40
420
400
3653
0
Qa
Río Ag
Oag
35
420
3 39 840 00
4288 Cerrro El Quemado
Qcf Ppo
75
0
00 3900
a eb r
Ppo
42
00
39
0
R í o C h i ta
406
40
erta waykho
Qu
410
52
48
42
4100
ga
ti ll o
40
60
20
20
65
65 65
60
4000
65
55
400
Río Chilco
380
60
45
40
55
Nnz
3500
4018 Cerro Jatun Loma
65
Otp
0
4000
Nnz
Nnz
58
400
3600
50
4092
Qa
Quebrada Challviri
sa uim
00
40
4100
g Oa
iene
Hu
ío
r illa
12
ied
51
20
10
4100
to os ng
zm ay u
oS Ri
10
Qcf
Mina Lipina
66°20'
C ru
00
44
je a or
Qcf
3730
Psv 24
as
ko
r Po
52
25
4500
15
80 65 jo Phu
00
4000
Oko
00
00
4200
3800
00
00
nte
Qcf
CB-253
Qg
41
illac Qu
O
a
4500
Qa
61
50
60
eb Qu
20
60
40
810
Otp
4062 Cerro Yuraj
Nnz
Nnz
63
4280
46
60
60
Oko
58
49
71
65
70
0
45
a ad
aya
ad br
0 10
0
00
440
60
Oma
70
ebrada K olpayoj
40
Qcf
4622
Supervisión: Neomecio Choque M. Gonzalo Quenta Q. Richard Zenteno P.
Cartografía digital: Lucio Romero P.
0
4200
53
CB-223 CB-222
pa
770
Nlid
am Irup da ra
Nlid
Naze
CB-254
430
70
nC a tu oJ Ri
4408 Canaleta Loma
oP Ri
Qu
4352
4200
4
MIna San Jorge
50
40
4100
70
00
Mina Avaroa Sb,Au
ue
71
47
69
56
34
Queb rada 4200
0
14
15
Pp o
3900
Nlid
CB-221
0
42
4274
00
4200
55
Au
Qc
o Pp
0
500
62
60 60
70
60
72
62
3900
63
4091
Mina Alianza
Qc
55
50
58
0
61
25 35
4122
Q
Q ue br ad a H u aylla 72
a
00
3700
55
00
Ppo
46
5189 Cerro Lipina
00
4700
C a n c h a P a la
40
Mina Chilco Au
4202
0
Qcf
CB-255
a
Qc
Qd
CB-225
eb
Río
66°25'
Geólogos responsables: Oscar Almendras A. Josue Montevilla Ch.
Qcf
410
26
ie
Nlid
Qcf
om
Nes
470
CB-224
49
28
CB-256
410
41
40
60
Oag
4100
00
38
Qcf
00
Ntlt2
4562
20
60
60
45
440
0
65
50
45
35
Nlid
Ntlt2
Qcf
43
00
41
Qcf
L he
4600
m sa
a
Añ
25
Rí
4200
Ok
Bi,Pb,Ag
Q ui
br
da
400
43
Río Chílco 50
lc Pa
39
40
40
Oag
50
Oag
45
52 4000
18
o Rí
a
o s till Ca
R ío
j
17
4000
4816
i Qcf R um
ue
12
17
32
Qcf ESTANCIA RODEO
Qcf
ya
50
63
49
30
Oma
Qa 0
00
0
ora ca
Oma
4310
16
460
yo
ir i
aS
20
Qu
00
6
h a llv
400
20
a ad
ca Se
43
Qcf
0
43
2
C Río
br ue
CB-258
l
rad
Nes
25 R ío
CB-294
CB-226
00
pa
Q
Ntlt2 45
00
e Isab
eb Qu
Qcf
Qcf
Qcf
760 000 m. E.
66°30'
3900
4800
00
47
n ta Sa
Ntlt2
Nes
430
oj ay ui t oh
15
49
00
47
o
00
CB-257
ul i li C Cu
20
Qcf
Janaj Ciénaga Río
4800
00
20
10
SANTA ISABEL
Nes
CB-227
Rí
10
4768
4100
aM o ra do
4200
00
45
4500
49
4900
Ntlt2
21°40'
0
4300
Qcf
0
Qcf 480
er Khoya om Qc Kh
10
4400
15
46
4764 Cerro Yana Orkho
Qcf
Qcf
490 5000
Qa
46
CAMPAMENTO MERCEDES
Qc
10
14
h o M a yu
b ra d
rad
4100
60
63
76
Mina Quillacas
4100
Oko
65
420
Qcf
R an c
22
8
68
57
Qcf
Qcf
Qa
A
50
40
00
Rí o
l ca
10
4500
Qc
4524
0
74
65
43
61
49
00
Oko
Qa
4368
45
Kh o cha pa
450
9
4200
0
11
a
Oma
0
20
60
0
c
450
R ío
tar
16
Qc
10
Qcf
Q ue
Ntlt2
Qc
Psv
4400
pa
r
nu
65
45
Lid ia Cu eva
Q
10
160
Qc
0
Qcf
6
R ío
a ad br
Cu
eb
aU ac
u
4000
Qcf
ra
z m ay
41
4464 63
Nes_ r Ba
30
Pb,Zn,
b ra d a
4400
53
MIna Rancho Orkho
VILUYO
V
10
5
4400 Ntlt2
62
Q ue
18
00
CB-244
aC ru
o
10
Ntlt2
r ad
Mina Poderosa
0
73
4370 eb
l uy Vi
6
44
25
0
Qcf
0
440
54
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6
24
50
4565 Cerro Rancho Orkho
4100
Nes
450
Psv
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8
18
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430
Qcf
430
4400
Au
12
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7
5
4661
10
10
Qd
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10
6
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4600
12
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7325
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60
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4146
SGTM SERIE I-CGB-57
66°5'
00
39 410
4000
0
Qcf
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8 CB-363
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Nes
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Psv Qcf
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ESTANCIA KOLLPANI
40
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4606 Cerro Tangani
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Psv
CB-385
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4500
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4267
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8
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MAPA GEOLOGICO DE CHILCOBIJA
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F F
HOJA 6329 CHILCOBIJA
the Ordovician sedimentation and developed a synsedimentary deformation of the basins at that time. Later, the stage effects of the Eohercinian phase affected the Ordovician rocks a shearing and weak epimetamorphism. There are not sedimentary records during Silurian – Jurassic, and that suggests the presence of an import uplifted terrains. The sedimentation was reinitiated in the Maastrichtian with the depositation of El Molino Fm., outcropped in the Esmoraca area. A foreland basin was generate at Eocene times, related to compressive regime of the Upper Oligocene, which Caused a shortening of the basin and permitted the development of thrust belt to NNE – SSW, and the origin of the San Vicente thrust. Later, It had a transpressive component at the time deposition of the Esmoruco Fm. occurred. This is reflected by the N – S folding of the Potoco, San Vicente, and Esmoruco formations. As a consequence of the movements of the Quechuana tectonic phase, It was generated several tectonoestratigraphic domains limited by regional faults in the southern Altiplano. During Lower Miocene a piggy – back thrust sequence developed allowing the Nazareno Fm. depositation in the Eastern Cordillera domain. The isolate development of the magmatic activity of the area is related to the process of volcanic arc activity, which were developed from Lower Miocene and correspond to back arc.
CARTA GEOLOGICA DE BOLIVIA HOJA CHILCOBIJA ESCALA 1: 100.000
PETROLOGY. The chemical analysis achieve in the volcanic rocks of the area allows to make a classification as a basaltic trachyandesites, andesites, dacites and trachydecites (TAS Diagram). Located also in the field of the calc-alkaline rocks, rich in K (AFM Diagram), they constitute characteristic of volcanic activity related to the subduction zone.
ECONOMIC GEOLOGY. The metallic deposits of the area are mainly hydrothermal
veins hosted in sedimentary rocks, with mineralization of Sb and Au (Chilcobija, Avaroa, and Candelaria), Pollymetallic: Sn, Pb, and Zn (Santo Domingo and Trapiche). Mineralization of Au were developed in hydrothermal deposits and they are found in the Chilco and Sucre mines. In the Azulejos Estatovolcano, Galan, and Lipina there are mineralization with Bi, W, Pb, Ag, and Au, they happen in vein deposits of hydrothermal origin, emplaced in volcanic rocks and related to silicification, argillization, and propylization. Alluvial Au is exploited from the Kollpa Mayu and Santa Isabel rivers, and its tributaries. The principal districts of mineralization are in table of Mineral occurrences.
6230
6330
6430
6229
6329
6429
6228
6328
6428
Traducción al inglés: Neomecio Choque M. Fuente de Información y Consulta / Source of Information and Consult (1) (2) (3) (4) (5)
ALMENDRAS, O. & MONTEVILLA, J. 2010, Informe Interno DR-CB/10 Hoja Geológica Chilcobija: Programa Carta Geológica de Bolivia, SERGEOTECMIN. ERDTMAN, B.D., KLEY, J., MÜLLER & JACOBSHAGEN, V. 1995, Ordovician basin dynamic and new graptolite data from Tarija region, Eastern Cordillera, south Bolivia: VIIth International Symposium on the Ordovician System: Las Vegas. FORNARI, M., HERAIL, G., POZZO, L., VISCARRA, G., 1989, Los Yacimientos de Oro de los Lípez Bolivia Tomo I: Informe No. 19, ORSTOM.
GARCIA, R., 1996. Hoja Geológica Laguna Corante / Picalto: Programa Carta Geológica de Bolivia, Esc. 1:100.000, Publicación SGM-Serie I-CGM-48 SGM. LEMA, J. C., RAMOS, W., 1997, Hoja Geológica Esmoraca: Programa Carta Geológica de Bolivia, Esc. 1:100.000, Publicación SGM-Serie I-CGM-50 SGM.
PUBLICACION SGTM SERIE I-CGB-57
2010
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