Szczegóły publikacji
Opis bibliograficzny
Use of structure-from-motion algorithms for geomorphological analyses of simple volcanic structures: a case study of Chilcayoc Chico and four other volcanoes of the Andahua Group, Peru / Paulina LEWIŃSKA, Andrzej Gałaś // Journal of South American Earth Sciences ; ISSN 0895-9811. — 2021 — vol. 107 art. no. 103058, s. 1–12. — Bibliogr. s. 11–12, Abstr. — Publikacja dostępna online od: 2020-11-28. — P. Lewińska - dod. afiliacja: University of York, Heslington, York, UK
Autorzy (2)
- AGHLewińska Paulina
- Gałaś Andrzej
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 133335 |
|---|---|
| Data dodania do BaDAP | 2021-04-09 |
| DOI | 10.1016/j.jsames.2020.103058 |
| Rok publikacji | 2021 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of South American Earth Sciences |
Abstract
The Chilcayoc Chico volcano is classified as a scoria cone and a part of the Quaternary Andahua Group, southern Peru. In 2017, we performed detailed geological and morphological surveys, including a collection of 163 photographs that allowed for the creation of a 3D model based on Structure-from-Motion (SfM) algorithms. We compare the results of morphometric analyses of cone parameters (basal diameter, height, crater diameter) obtained in different ways: 1:50 000 scale map, satellite based DEM (from SRTM and ASTER missions), and from 3D SfM based models in order to evaluate data source quality. We concluded that maps and DEM based data is not detailed enough to bring any meaningful concussions for evaluation of age of small volcanic cones and more detailed 3D models, are necessary. We propose a method for fast image and spatial data gathering for SfM of volcanic cones. Models of Chilcayoc Chico show shelf-like structures within the crater that indicate that the cone was formed by multiple consecutive volcanic activities. We identified at least four, Strombolian or Hawaiian-type eruptive (3 Strombolian style eruption dominated episodes and 1 effusive style eruption). Evidences of effusive activity were observed, eruption dynamics became subsequently less explosive until culminating in a final effusive eruption phase. This is in contrast to previous studies that suggested that Chilcayoc Chico is a long-lived scoria cone with the sign of slight shifts of the active vents within the crater. We also provided a similar analysis of other cones from the area (Chilcayoc, Chilcayoc Grande, Jechapita, Puca Mauras) in order to estimate their relative age.