Integration of Near-Surface Complementary Geophysical Techniques for the Study of Ancient Archaeological Areas in the Atacama Desert (Pampa Iluga, Northern Chile)
Fernanda Gallegos-Poch
(1)
,
Benoît Viguier
(2, 3)
,
Giovanni Menanno
(1)
,
Valentina Mandakovic
(4)
,
Gonzalo Yáñez
(1)
,
Sergio Gutiérrez
(1)
,
Catalina Lizarde
(1)
,
Jaime Vargas Araya
(5)
,
Camila López-Contreras
(1)
,
Pablo Mendez-Quiros
(6)
,
Antonio Maldonado
(7)
,
Mauricio Uribe
(8)
1
Departamento de Ingeniería Estructural y Geotécnica
2 GEOAZUR 7329 - Géoazur
3 ICIn - UOH - Instituto de Ciencias de la Ingenieria
4 Universidad de Tarapaca
5 Departamento de Geología
6 Departamento de Prehistoria
7 CEAZA - Centro de Estudios Avanzados en Zonas Aridas
8 Departamento de Antropología
2 GEOAZUR 7329 - Géoazur
3 ICIn - UOH - Instituto de Ciencias de la Ingenieria
4 Universidad de Tarapaca
5 Departamento de Geología
6 Departamento de Prehistoria
7 CEAZA - Centro de Estudios Avanzados en Zonas Aridas
8 Departamento de Antropología
Fernanda Gallegos-Poch
- Fonction : Auteur
- PersonId : 1208380
- ORCID : 0000-0001-5806-876X
Benoît Viguier
- Fonction : Auteur
- PersonId : 1202467
- IdHAL : benoit-viguier
Giovanni Menanno
- Fonction : Auteur
- PersonId : 1208381
- ORCID : 0000-0001-5293-8314
Valentina Mandakovic
- Fonction : Auteur
- PersonId : 1208382
- ORCID : 0000-0002-5104-8552
Gonzalo Yáñez
- Fonction : Auteur
- PersonId : 1208383
- ORCID : 0000-0002-2989-9457
Sergio Gutiérrez
- Fonction : Auteur
- PersonId : 1208384
- ORCID : 0000-0002-1124-038X
Catalina Lizarde
- Fonction : Auteur
- PersonId : 1208385
- ORCID : 0000-0002-2689-3105
Jaime Vargas Araya
- Fonction : Auteur
- PersonId : 1208386
- ORCID : 0000-0003-1064-9252
Camila López-Contreras
- Fonction : Auteur
- PersonId : 1208387
- ORCID : 0000-0002-0874-3963
Pablo Mendez-Quiros
- Fonction : Auteur
- PersonId : 1208388
- ORCID : 0000-0001-5385-290X
Antonio Maldonado
- Fonction : Auteur
- PersonId : 1208389
- ORCID : 0000-0002-1748-6639
Mauricio Uribe
- Fonction : Auteur
- PersonId : 1208390
- ORCID : 0000-0002-6158-2433
Résumé
Near-surface geophysical techniques are useful for the characterization of archaeological areas because of their ability to rapidly cover wide extensions and obtain high-resolution data to identify the location for archaeological excavations. However, in hyperarid environments usual geophysical techniques may fail to obtain the expected results due to the dry near surface. This study proposes an integration of ground penetrating radar (GPR) and
electromagnetic induction (EMI) techniques, to elucidate the origin of thousands of aligned circular features located at the Iluga archaeological area emplaced on one of the driest places on Earth (Pampa del Tamarugal, Atacama Desert). The GPR was useful to recognize alluvial deposits, sandy aeolian filling in pre-existing holes and roots right underneath circular features. Magnetic susceptibility data derived from the EMI in-phase component,
usually considered a complementary result, were useful to identify fireplaces in the vicinity of the alignments. These geophysical findings were verified with an archaeological excavation. It has been found that circular features resulted from an extensive deforestation process in the Pampa del Tamarugal, consisting in the extraction of both trunk and roots of algarrobos (Prosopis chilensis) or tamarugos (Prosopis tamarugo), likely for recent charcoal
production. The proposed methodology delivers promising results for archaeological and shallow geological studies in hyperarid and dry environments.
Format du dépôt | Notice |
---|---|
Type de dépôt | Article dans une revue |
Titre |
en
Integration of Near-Surface Complementary Geophysical Techniques for the Study of Ancient Archaeological Areas in the Atacama Desert (Pampa Iluga, Northern Chile)
|
Résumé |
en
Near-surface geophysical techniques are useful for the characterization of archaeological areas because of their ability to rapidly cover wide extensions and obtain high-resolution data to identify the location for archaeological excavations. However, in hyperarid environments usual geophysical techniques may fail to obtain the expected results due to the dry near surface. This study proposes an integration of ground penetrating radar (GPR) and
electromagnetic induction (EMI) techniques, to elucidate the origin of thousands of aligned circular features located at the Iluga archaeological area emplaced on one of the driest places on Earth (Pampa del Tamarugal, Atacama Desert). The GPR was useful to recognize alluvial deposits, sandy aeolian filling in pre-existing holes and roots right underneath circular features. Magnetic susceptibility data derived from the EMI in-phase component,
usually considered a complementary result, were useful to identify fireplaces in the vicinity of the alignments. These geophysical findings were verified with an archaeological excavation. It has been found that circular features resulted from an extensive deforestation process in the Pampa del Tamarugal, consisting in the extraction of both trunk and roots of algarrobos (Prosopis chilensis) or tamarugos (Prosopis tamarugo), likely for recent charcoal
production. The proposed methodology delivers promising results for archaeological and shallow geological studies in hyperarid and dry environments.
|
Auteur(s) |
Fernanda Gallegos-Poch
1
, Benoît Viguier
2, 3
, Giovanni Menanno
1
, Valentina Mandakovic
4
, Gonzalo Yáñez
1
, Sergio Gutiérrez
1
, Catalina Lizarde
1
, Jaime Vargas Araya
5
, Camila López-Contreras
1
, Pablo Mendez-Quiros
6
, Antonio Maldonado
7
, Mauricio Uribe
8
1
Departamento de Ingeniería Estructural y Geotécnica
( 1147876 )
- Chili
2
GEOAZUR 7329 -
Géoazur
( 239385 )
- 250 rue Albert Einstein, Sophia Antipolis 06560 VALBONNE
- France
3
ICIn - UOH -
Instituto de Ciencias de la Ingenieria
( 527650 )
- Universidad de O'Higgins
Av. Libertador Bernardo O'Higgins 611, Rancagua
- Chili
4
Universidad de Tarapaca
( 335809 )
- Arica
- Chili
5
Departamento de Geología
( 1147988 )
- Chili
6
Departamento de Prehistoria
( 1147990 )
- Espagne
7
CEAZA -
Centro de Estudios Avanzados en Zonas Aridas
( 92036 )
- Benavente 980, casilla 599, La Serena, Chile
- Chili
8
Departamento de Antropología
( 1147991 )
- Av. Capitán Ignacio Carrera Pinto 1045, Ñuñoa, Santiago, Chile
- Chili
|
Vulgarisation |
Non
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Langue du document |
Anglais
|
Nom de la revue |
|
Date de publication |
2022-12
|
Financement |
|
Domaine(s) |
|
Mots-clés |
en
Archaeo-geophysics, Atacama Desert, Hyperarid region, GPR, EMI, Deforestation
|
DOI | 10.1007/s10712-022-09750-z |
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