29 July 2021
AperTO - Archivio Istituzionale Open Access dell'Università di Torino
Original Citation:
Geological map of the Monviso massif (Western Alps)
Published version:
DOI:10.1080/17445647.2013.842507
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A A' 2720 2532 2643 3107 3028 2861 3171 2886 2689 2882 2938 2529 2526 2393 1928 3007 2022 1744 2838 3027 1885 3070 2004 2312 2314 2559 2400 2472 3205 3054 2815 2592 2420 2385 3010 3346 2689 3019 3147 2324 2309 2655 3841 2458 3449 3779 2415 3573 2567 3241 2753 2691 2540 2588 3361 2233 3380 2990 3154 2514 2398 2909 3099 2449 3151 3166 2184 2675 2167 2918 2013 2579 3059 2728 2762 2126 2026 2112 2304 2478 2791 2380 2513 2663 3016 2437 2753 Rio Pisai Fiume Po Passo di San Chiaffredo Rif. Alpetto Monte Grané Alpe Bulé Visolotto Lago Bulé Grange del Rio Cadreghe di Viso Rocce Alte Punta Roma Lago Grande di Viso
Monte
Granero
Rocca Nera Pian Melzé Rif. GiacolettiMonviso
Punta Sella Rocce Meano Punta DanteViso
Mozzo
PassoLuisas MeidassaMonte
Truc Bianco Rocca del Lu Testa Rossa Punta Fiume Punta Trento Rif. Pian del Re la Sellaccia Colle Armoine Punta Forcion Lago Chiaretto Lago Superiore Punta Barracco To rre nt e Va lla nt a Rocce di Viso Punta Caprera Colle di Luca Lago Gallarino Passo dei Duc Costa Pelata Buco di Viso Lago dell' Alpetto Rocce Sbiasere Lago Fiorenza Punta Gastaldi Passo due Dita Colle dei Viso Punta Michelis Ghiacciaio Caprera Colle Seilliere Passo Gallarino Passo Guillemin Rif. Vallanta Punta Rasciassa Coulour Bianco Punta Sea Bianca Lago Costa Grande Passo di Vallanta Monte Losetta Viso di Vallanta Colle della Gianna Ghiacciaio Vallanta Punta delle Guglie Monte Ghincia Pastour Punta Udine Passo delle Sagnette Rif. Q.Sella Colle delle Traversette Laghi delle Forciolline 2800 2600 2400 2200 2000 2000 2200 2400 2600 2800 30 00 3200 3400 3600 32 00 2200 2400 2600 2800 30 00 34 00 3600 3800 3400 3200 3000 2800 2600 2400 2200 2000 2400 2600 2800 30 00 3000 2800 2600 2400 2200 2000 1800 RioBu lè Ref. du Viso Lac Lestio Cima delle Lobbie
Rio delleForciolline
5 2 5 5 5 5 1 2 4 1 5 9 2 4 5 7 10 50 30 17 35 70 20 50 45 31 14 10 10 62 50 52 30 10 20 20 12 15 40 11 21 10 10 14 20 20 11 10 10 28 28 11 25 30 60 20 9 20 55 12 20 44 20 47 31 37 45 30 18 10 48 41 30 15 41 33 31 35 31 51 33 48 30 28 21 40 10 21 18 11 30 38 40 31 39 49 28 36 40 20 29 40 22 22 39 31 18 38 32 59 20 30 40 38 18 14 33 21 11 21 26 26 20 53 19 20 19 38 31 54 40 21 20 40 24 35 18 21 16 28 19 32 33 26 11 36 42 34 27 30 60 19 17 13 42 18 29 29 40 31 46 Mb Ug Mb Ms Ms Tl Ug Tl Mb Mg Ug Tl Ms Ul Tl Mb Ms Tl Tl Rg2 Tl Mb Tl Rg2 Mb Mb Ld Tl Me Ug Tl Ld Tl Tl Mg Tl Ug Ld Ms Tl Ul Ug Tl Ug Mc Ld Ug Ms Dc Ms Rg2 Dq Tl Tl Tl Tl Mc Qc Tl Tl Tl Rg2 Tl Tl Ms Tl Mb Tl Ul Tl Tl Tl Mb Ld Ld Ug Tl Ug Rg2 Ug Mc Ug Ug Mg Ug Rg2 Tl Tl Tl Ug Ms Ld Qc Tl Ug Rg2 Ld Ug Mb Ug Ug Ul Dm Td Ms Dc Tl Tl Mb Ms Ug Ul Ug Tl Tl Ug Ug Ug Mb Ld Tl Ms Dq Dc Tl Tl Tl Tl Tl Tl Td Tl Ms Mg Mc Td Tl Tl Tl Tl Ld Fl1 Fl1 Ug Ul Tl Tl Tl Mc Mc Ms Tl Ms Ug Ld Mg Mg Ug Ug Ug Tl Tl Dm Mc Ul Dm Ug Ul Mc Mb Ul Tl Tl Ug Fl1 Qc Ld Tl Dm Td Mg Ld Tl Mb Mb Fl1 Tl Tl Ug Ld Rg1 Tl Fl1 Ms Ug Mc Dm Rg2 Bs Ms Tl Mb Tl Ug Tl Ld Dc Tl Td Tl Rg1 Mb Ld Fl1 Dc Ms Fl1 Tl Mg Td Ms Ul Rg2 Mc Td Tl Ms Ld Ug Td Tl Tl Qc Ld Ug Mc Ms Rg2 Tl Ug Rg2 Mb Ms Rg2 Ug Tl Ug Ul Mg Ug Ug Ug Mc Ug Ms Tl Rg2 Td Td Fl1 Ld Mc Ld Fl2 Mg Ul Td Fl1 Ug Mc Td Rg2 Tl Tl Ug Ms Dc Fl1 Fl1 Mg Mg Fl1 Ms Ug Td Ms Rg1 Mg Tl Qc Rg2 Mb Ug Ms Rg2 Ld Fl1 Ms Me Ug Rg2 Mb Tl Ug Rg2 Mg Fl1 Mc Tl Ld Fl2 Mc Fl1 Ug Td Fl1 Ms Rg2 Td Td Td Ld Ms Mb Td Fl1 Rg1 Ug Rg2 Fl1 Tl Mc Ug Td Ld Ug Mg Mc Td Me Mg Mc Fl1 Ms Ms Fl1 Mg Ms Fl1 Mg Mg Me Ms Tl Tl Mc Ug Fl1 Ms Mg Fl1 Fl1 Fl1 Ms Fl1 Tl Fl1 Dc Ld Td Fl1 Ug Fl1 Ug Td Fl1 Mc Mg Dc Mb Mb Ug Ms Mg Mg Qc Me Mg Mb Ms Fl1 Ld Fl1 Fl1 Mg Mc 41 Td Rg2 Ug Fl1 Ms Mb Td Mc Mc Me Mc Ms Td Fl1 Mc Mg Mc Ug Ms Mc Fl1 Mc Me Mb Mc Dq Mc Fl1 Mg Td Fl1 Mc Mc Mc Dq Mc Mg Mc Mc Ms Mc Rg2 Ms Ms Mc Ms Mc Ms Fl1 Me Mc Mb Mq Me Mq Ms Ms Mc Mc Mg Me Mc Me Mg Ms Mq Ms Mg Mb Mg Mg Mc Qc Mq Mg Mq Mc Mc Mb Mc Mc Ms Ms Mc Mb Ms Ms Ms Mq Mg Mc Me Ms Mq Me Mc Mg Mq Mc Mq Mq Mq Mc Mg Ms Me Mg Mc Me Mc Mq Mq Mq Mg Mg Mg Me Mc Mq Mc Me Me Mq Mq Mc Mq 0 1 2 km
Queyras Schistes Lustrés
Vallanta Unit (VA) Forciolline Unit (FO) Viso Mozzo Unit (VM)
Lago Superiore Shear Zone (LS) Basal Serpentinite Unit (BS)
Deep-seated gravitational slope deformation
Dora-Maira
N
Tectonic sketch map
44°39’ 44°41’ 44°43’ 7°04’ 7°06’ 7°08’ 7°10’ P.ta Sea Bianca M. Granero
Monviso
Viso MozzoM. Losetta Cima delle Lobbie P
.
ta Rasciassa P.ta Michelis Fiume PoBS
BS
LS
LS
VM
VM
FO
FO
VA
VA
N
S
W
E
The topographic map derives from the Carta Tecnica Regionale of the Regione Piemonte (vector_50 series; Coordinate System WGS 1984
UTM Zone 32N).
Quaternary deposits Tertiary Piemonte Basin
Meso-Cenozoic units Ivrea-Verbano Zone Canavese Zone
Helminthoides Flysch
Blueschist Piemonte units (QU: Queyras Schistes Lustrés) Eclogitic Piemonte units (MO: Monviso Meta-ophiolite Complex) Lanzo Ultrabasic Complex
Middle Penninic units
Upper Penninic units (DM: Dora-Maira) PENNINIC DOMAIN
HELVETIC-DAUPHINOIS DOMAIN SOUTHERN ALPINE DOMAIN
Sesia-Lanzo Zone AUSTROALPINE DOMAIN Po Ri ver QU Paleozoic units
Tectonic map of the Western Alps
Po Valley
DM
MO
Monviso
The red inset shows the study area
MONVISO META-OPHIOLITE COMPLEX
Late- to post-metamorphic fault (dashed where inferred) Tectonic contact
© Journal of Maps, 2013
Qc Mb Mg Ms Dc Dm Mc Mq Me a c a a b c d a b b a a Dq0
500
1000
1500
2000 m
m 500
GEOLOGICAL MAP OF THE MONVISO MASSIF (WESTERN ALPS)
Gianni Balestro
(1)
, Gianfranco Fioraso
(2)
& Bruno Lombardo
(2)
(1) Dipartimento di Scienze della Terra, Università degli Studi di Torino, Via Valperga Caluso 35 - 10125 Torino, Italy. Email:
gianni.balestro@unito.it
(2) Istituto di Geoscienze e Georisorse, Consiglio Nazionale delle Ricerche, Via Valperga Calsuso 35 - 10125 Torino, Italy
Fine- to medium-grained lawsonite-bearing calcschists (Mc), in places with dm- to
m-sized levels and bodies of metabasite (a). Late Jurassic? - Cretaceous?
Fine- to medium-grained calcschists with levels of micaceous marbles (Dc). Early
Jurassic?
White to grey fine-grained marbles and dolomite marbles (Dm). Middle Triassic? -
Late Triassic?
Micaceous quartzites and fine-grained micaschists (Dq). Permian?
Quartz-rich, garnet-bearing micaschists (Mq); phengite, garnet-bearing metacherts
(Monte Meidassa, S of Lago Fiorenza, Monte Ghincia Pastour, Punta Forcion, NE of
Punta Gastaldi, E of Passo delle Sagnette) (a). Late Jurassic?
Banded epidote- Na-amphibole metabasites, greenschists (Mb); pillowed
metabasalts and basalt metabreccias (a); massive eclogite-facies metabasites (b).
Middle Jurassic? - Late Jurassic?
"Smaragdite"-bearing Mg-Al metagabbros (Mg); coarse-grained metagabbros with
well-preserved magmatic fabric (a); cumulate metatroctolites (N and S of Punta
Fiume) (b); greenschist-facies Mg-Al metagabbros (c); bodies of eclogite (d). Middle
Jurassic?
Antigorite serpentinites and antigorite schists (Ms); massive metaperidotites (Colle
Armoine, SW of Lago Fiorenza, E of Punta Caprera) (a); meta-ophicalcites (NE of
Colle Armoine, NE of Costa Pelata, SE of Punta Rasciassa) (b); rodingite dykes (c).
Middle Jurassic?
Eclogite-facies Fe-Ti metagabbros and fine-grained eclogites (Me); eclogitic
metabreccias (Punta Forcion, SW of Testa Rossa, Colle di Luca) (a). Middle
Jurassic?
Undifferentiated carbonate metasediments (calcschists s.l.) (Qc). Early Cretaceous? -
Late Cretaceous?
QUATERNARY DEPOSITS
Fl1 Alluvial and debris flow deposits, composed of gravelly cobbles and sandy gravels, clast-supported, well stratified to massive, sometimes containing decimetric- to
metric-scale boulders (Fl1). Peat bogs (Pian del Re). Late Upper Pleistocene - Present
Fl2 Ancient alluvial and debris flow deposits, composed of gravelly cobbles with sandy matrix, clast-supported, massive to crudely stratified, sometimes containing
decimet-ric- to metdecimet-ric-scale boulders (Pian Melzé) (Fl2). Late Upper Pleistocene - Holocene
Td Mixed talus and debris flow deposits, composed of angular clasts, cobble and gravel
with crude stratification, clast supported, sometimes with partially openwork texture (Td). Late Upper Pleistocene - Present
QUEYRAS Schistes Lustrés
MONVISO META-OPHIOLITE COMPLEX
DORA-MAIRA
Alluvial and debris flow fan Mixed fan
Talus fan
Upper Pleistocene moraine
Little Ice Age and subsequent moraine Rock glacier ridge
Trench Counter-slope Yelding surface
Boundary of the 1989 Coolidge ice avalanche accumulation
Lithological contact Tectonic contact
Late- to post-metamorphic fault (dashed where inferred) Main foliation (Sp) Pre-Sp foliation Syn-Sp fold axis Post-Sp fold axis
10 10 10 10 10 A A'
Post-Sp axial surface
Trace of cross section
3016 2663 2381 3019 3171 2722
P.
taSea Bianca
M. Granero
Monviso
Viso Mozzo
P.
taTre Chiosis
Cima delle Lobbie
P.
taRasciassa
M. Riba
P.
taMichelis
GLg
VLg
POg
PSg
ALg
BLg
Upper Pleistocene end moraine Little Ice Age and subsequent end moraine Diffluence saddle 0 1 2 3 4 km Drainage divide POg: Po Glacier PSg: Pisai Glacier
ALg: Alpetto Glacier
BLg: Bulé Glacier VLg: Vallanta Glacier GLg: Guil Glacier 3080 3840 3151
Ice flow direction
7°12’ 7°10’ 7°08’ 7°06’ 7°04’ 44°37’ 44°39’ 44°41’ 44°43’ 44°39’ 44°37’
Ice-flow pattern of glaciers during the Last Glacial Maximum
44°42’ N 44°41’ N 44°40’ N 44°39’ N 44°38’ N 44°37’ N 44°37’ N 44°38’ N 44°39’ N 44°40’ N 44°41’ N 44°42’ N 44°43’ N 44°43’ N 7°08’ E 7°07’ E 7°06’ E 7°05’ E 7°04’ E 7°03’ E 7°03’ E 7°04’ E 7°05’ E 7°06’ E 7°07’ E 7°08’ E 7°09’ E 7°10’ E 7°10’ E 7°09’ E CNg: Contesse Glacier
CNg
Protalus rampartTl Talus deposits, composed of centimetric to decimetric angular fragments and blocks,
clast supported, with openwork to partially openwork texture (Tl). Late Upper
Pleisto-cene - Present
Ld Landslide deposits, composed of chaotic accumulation of angular blocks and gravelly-sandy matrix (rock fall and earth flow) or loosened portions of bedrock (rock
slide) (Ld). Late Upper Pleistocene - Present
Ug Undifferentiated glacial deposits, made up of diamicton and chaotic blocks
accumula-tion with silty-sandy matrix (Ug). Upper Pleistocene
Ul Undifferentiated glacial deposits, made up of diamicton with silty-sandy matrix and
chaotic blocks accumulation. Blocks are locally devoid of lichens (Ul). Holocene -
Present
Rg1 Active rock glacier, composed of poorly sorted angular blocks, at surface, and blocks and fine material with interstitial ice, below the surface. Blocks are locally devoid of
lichens (Rg1). Holocene - Present
Rg2 Inactive rock glacier, composed of poorly sorted angular blocks, at surface, and
blocks and fine material below the surface. Blocks are lichen covered (Rg2). Holocene
Bs Block stream composed of chaotic accumulation of angular blocks with
coarsening-upward texture (Bs). Holocene
4000 3000 2000 1000 2000 m 0 3000 m a.s.l. 2000 1500
