zorritas

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zorritas
Supplement 3. Detailed geological maps of sampling areas. (A) Cordón de Lila, (B) Zorritas
Formation, (C) Salar de Navidad, (D) Los Colorados, (E) Sierra de Argomedo, (F) Sierra de
Zapla. (G) Figure 1 with the map areas are marked with red squares.
References in Appendix 3:
BREITKREUZ, C. 1986. Das Paläozoikum in den Kordilleren Nordchiles (21°-25°S).
Geotektonische Forschungen, 70, 1-88.
MOYA, M. C. & MONTEROS, J. A. 1999. El Ordovícico Tardío y el Silúrico en el borde
occidental de la Cordillera Oriental argentina. In: XIV Congreso Geológico Argentino,
Salta, Actas, 1, 401-404.
GRAHN, Y. & GUTIÉRREZ, P. R. 2001. Silurian and Middle Devonian Chitinozoa from the
Zapla and Santa Barbara Ranges, Tarija Basin, northwestern Argentina. Ameghiniana,
38, 35-50.
NIEMEYER, H., VENEGAS, R., GONZÁLEZ, C. R. & ACEÑOLAZA, F. G. 1997a. Los terrenos
paleozoicos del Salar de Navidad, Región de Antofagasta, Chile. Revista Geológica de
Chile, 24, 123-143.
NIEMEYER, H., URZÚA, F. & RUBINSTEIN, C. 1997b. Nuevos antecedentes estatigráficos y
sedimentológicos de la Formación Zorritas, Devónico-Carbonífero de Sierra Almeida,
Región de Antofagasta, Chile. Revista Geológica de Chile, 24, 25-43.
(A) Cordón de Lila
(samples CL-08-66, CL-08-73)
560 -E
550 -E
540 -E
570 -E
GEOLOGY OF THE WESTERN BLOCK
580 -E
Extrusive igneous and sedimentary rocks
N
Salar de
Atacama
7.380 -N
o o
TILOPOZO
CL-08-73
La Tabla Formation: continental andesitic, dacitic and rhyolitic lavas and
dacitic breccias (Carboniferous - Permian).
Tuc
v
v
X
X XX
Granitic plutonic rocks rocks
Fine - grained dark diorites in stocks and sills (Ordovician).
d
Pingo-Pingo Pluton: light gray medium-grained hornblende-biotite
granodiorite with equigranular texture (Ordovician).
Alto del Inca Pluton: dark red coarse-grained biotite monzogranite with
equigranular texture (Ordovician).
PORTEZUELO
PLUTON
Fault
Cerro Lila Diorite: dark gray medium-grained hornblende diorite with
equigranular texture (Ordovician?).
Pedregoso Pluton: light gray medium to coarse-grained biotite-hornblende
granodiorite with equigranular texture (Ordovician).
TILOPOZO
PLUTON
Choschas Pluton: dark gray medium-grained hornblende diorite with
equigranular texture (Ordovician).
GEOLOGY OF THE EASTERN BLOCK
Fault
7.360 -N
PEDREGOSO
PLUTON
d
úca
ro
CORDÓN DE LILA
CL-08-66
+
+ +
+ +
+ + +
+ + +
+
Quebrada Grande Formation: marine conglomerate, sandstone and siltstone
(Upper Arenigian - Lower Llanvirnian).
Quebrada Ancha Formation: marine sandstone (Llandoverian).
TUCÚCARO
PLUTON
Salar de
Atacama
Sedimentary rocks
Thin bed of non-turbiditic sedimentites within a black and coarse-grained sill
of amphibole gabbro (Ordovician).
TAMBILLO
PLUTON
Granitic plutonic rocks
Cerro Tambillo Gabro: sill of black coarse -grained gabbro (Ordovician).
+
PINGO PINGO
PLUTON
7.340 -N
Cordón de Lila Complex (CISL): basalt with pillow structures, dacitic breccia
and turbidite (Upper Tremadocian - Middle Arenigian).
X X
Tucucaro Pluton: light gray to pale pink medium to coarse-grained biotite
monzogranite with equigranular texture (Ordovician).
Tilopozo Pluton: white medium to coarse-grained garnet-muscovite
monzogranite to syenogranite with equigranular texture (Ordovician).
Portezuelo Pluton: dark pink fine to medium-grained granite with granophyric
texture (Ordovician).
EL LEÓN PLUTON
Antofaga
sta
NEURARA
Tambillo Pluton: Gray to light pink to coarse-grained biotite-hornblende
monzogranite (Ordovician).
Chululo fringe: light to dark gray fine to medium-grained biotite diorite.
(Ordovician). It constains xenoliths of metamorphic rocks: schist and
calcsilicate metasediment with scarse amphibolite (Proterozoic to
Cambrian?).
El León Pluton: light green coarse-grained foliated biotite tonalite with
strongly inequigranular texture (Ordovician).
GEOLOGY OF BOTH BLOCKS
Extrusive sedimentary and igneous rocks
7.320 -N
0
10
SIE
Lila and Quebrada Zorritas Formations: marine quartzarenite (Devonian Lower Carboniferous).
km
Cerro Negro Formation : continental dark to pale violet dacite and andesite
(Kungurian).
RR
EIDA
E ALM
AD
7.300 -N
Intrusive igneous rocks
Undifferenciatiated granitoids (Upper Paleozoic).
ALTO DEL INCA PLUTON
MONTURAQUI
SYMBOLS
Fault.
CHILE
Railwa
y
AR
Strike and dip of beds in extrusive
igneous and sedimentary rocks.
A
GENTIN
Anticline.
Folds.
CHOSCHAS PLUTON
SOCOMPA
Syncline.
Salta
Sample
Hans Niemeyer/2011
(B) Zorritas Formation
(samples QC-08-39, MS-08-60)
53
ER
O
S
47
UA
NA
QU
24°32’
33
SIE
RR
AG
35
51
47
35
MS-08-60
45
35
59
49
67
37
24°35’
51
59
N
32
QC-08-39
2 km
68°37’
68°40’
Alluvial and volcanoclastic material (upper Cenozoic)
Quebrada Zamolana unit (Carboniferous):
rhyolite, volcaniclastic and sedimentary rocks
Sierra Guanaqueros granitoid (late Palaeozoic)
Zorritas Fm., Upper Mbr (early Carboniferous):
very fine sanstone
Zorritas Fm., Middle Mbr (Devonian - early Carboniferous):
siltstone, shale, mica sandstone
Zorritas Fm., Lower Mbr (Middle Devonian):
fine to coarse quartz arenite with conglomerate and
siltstone intercalations
Faults
Strike and dip of layers
Sample
Modified from Niemeyer et al. (1997b).
(C) Salar de Navidad
(samples CC-08-135, CC-08-139)
69°55’
69°58’
69°58’
RR
CE
23°31’
OS
DE
S
ITA
EV
CC-08-139
CU
CC-08-135
Alluvial material (Cenozoic)
Andesite (early Jurassic?)
Marine limestone and sandstone (Late Triassic - Early
Jurassic)
Rhyolitic porphyry stocks (Late Triassic)
Sandstone, siltstone, conglomerate and tuff (Late Triassic)
Cerro de Cuevitas Fm.:
quartz arenite, schist, an conglomerate with shelly
limestone lenses and tuff (early Permian)
Shelly limestone lenses in Cerro de Cuevitas Fm.
Sierra del Tigre Fm.:
quartzarenite and schist (Devonian)
Faults
Strike and dip of layers
Sample
N
1 km
SIE
RR
AD
EL
RE
TIG
23°36’
Modified from Niemeyer et al. (1997a).
(D) Los Colorados
(sample 02-66)
A
RR
A
AM
A
D
RA
CH
EB
QU
Q
Cretaceous to Cenozoic
Zapla and Chamarra fms
(Late Ordovician to early Silurian)
Parcha and Sepulturas fms (Ordovician)
Faults
Strike and dip of layers
Sample
U
A
AD
R
EB
23°23’
LO
S
O
C
LO
S
O
AD
R
N
1.2 km
65°43’
02-66
Modified from Moya & Monteros (1999).
(E) Sierra de Argomedo
(sample SA-08-125)
2 km
SA-08-125
24°45’
N
69°20’
Alluvial material (Cenozoic)
Volcanic rocks (Cenozoic)
Late Triassic to Jurassic sedimentary rocks
?Upper Carboniferous to Permian volcanic rocks
?Palaeozoic tonalite and monzogranite
Sierra de Argomedo Fm. (clastic and volcanic rocks)
Faults
Anticline
Syncline
Sample
Modified from Breitkreuz (1986).
(F) Sierra de Zapla
(sample AT-04)
65°00’
20 km
N
SIE
24°00’
LA
AP
EZ
AD
RR
San Salvador
de Jujuy
AT-04
El Carmen
24°30’
San Pedro
Cretaceous to Cenozoic
Silurian to Devonian
Cambrian to Ordovician
Faults
Anticline
Sample
Modified from Grahn & Gutiérrez (2001).
(G) Figure 1
70°W
60°W
50°W
ian
on
az ton
Am Cra
10°S
10°S
?
Go
?
?
belt
Sunsás
belt
15°S
sília
Bra
pia
am
-P
pa
ui
eq
Ar
15°S
iás
Ma
ssi
f
Sunsás
belt
20°S
terrane
20°S
¹
25°S
ESP
Precordillera
Río de la
Plata
craton
500km
WSP
Chilenia
30°S
35°S
30°S
Political boundaries
Inferred boundaries
between crustal units
Mesozoic to Cenozoic
?
? ?
25°S
35°S
Ordovician magmatic arc
?
Palaeozoic
Precambrian
40°S
80°W
70°W
70°W
D
22°S
60°W
CP-08-09
40°S
50°W
69°W
40°W
67°W
68°W
65°W
22°S
66°W
La Quiaca
G
CHILE
23°S
Mejillones
D
P
AR
BOLIVIA
San Pedro
de Atacama
EN
TI
NA
Tocopilla
O
Salinas
Grandes
CC-08-139
Antofagasta
CL-08-73
S
O
CL-08-66
24°S
Salar del
Rincón
24°S
Jujuy
C
S
S
CO-128
SdR-138
Silurian sedimentary rocks
Ordovician sedimentary rocks
Ediacaran - Cambrian
(meta)sedimentary rocks
Palaozoic ingeous rocks
Precambrian ingeous
& metamorphic rocks
S
02-66
70°W
Salinas
Mesozoic - Cenozoic,
undifferentiated
Late Plaeozoic volcanic rocks
Carboniferous & Permian
sedimentary rocks
Devonian sedimentary rocks
23°S
Salar de
Atacama
CC-08-135
50 km
87RG3
AT-04
MS-08-60
C
SA-08-125
69°W
C
D
QC-08-39
Salta
Salar de
Arizaro
68°W
67°W
66°W
65°W