Textural and compositional characterization and provenance analysis of beach sediments in golfo nuevo, chubut province
A textural and compositional characterization of beach sediments in 17 coastal profiles is presented from cerro Prismático northward to cerro Avanzado southward, in the golfo Nuevo, Chubut province. The aim of this work is to establish the main input source of sediments to the littoral system and t...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00044822_v74_n2_p207_Bunicontro |
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todo:paper_00044822_v74_n2_p207_Bunicontro2023-10-03T13:59:19Z Textural and compositional characterization and provenance analysis of beach sediments in golfo nuevo, chubut province Bunicontro, M.P. Marcomini, S.C. Weiler, N.E. López, R.A. Quenardelle, S. Granulometry Input Patagonia Petrography Sands chemical composition coastal sediment depositional environment granulometry intertidal environment outcrop petrography provenance sand sorting texture Argentina Chubut Golfo Nuevo Patagonia A textural and compositional characterization of beach sediments in 17 coastal profiles is presented from cerro Prismático northward to cerro Avanzado southward, in the golfo Nuevo, Chubut province. The aim of this work is to establish the main input source of sediments to the littoral system and the factors controlling their texture and composition. This work deepens and advances on sediments knowledge of Argentinean coast, establishing an accurate and quantitative background for futures researches. High intertidal sediments are composed by sand (62%) and gravel (38%), showing poor sorting. Sediments from the low intertidal, backshore and coastal dune environments show well sorted sandy sediments (more than 90% on average). Petrographic composition is homogenous along the coast, mostly characterized on average by lithic fragments (35%), plagioclase (24%), quartz (23%), feldspar (6%) and alterites (5%). The rocky coastal outcrops present up between 40% and 70% of sand, according to various authors, and it is found that both the composition and the proportion of its majority components are equivalent to that presented for beach sands. Also, due to the golfo Nuevo is a partially protected environment and the absence of evidences of littoral drift as well as the absence of allochthonous fluvial input inside it, it is concluded that the main source of sand to the littoral system results from the erosion of the cliffs that dominate the coastal landscape (Gaiman and Puerto Madryn formations). © 2017, Asociacion Geologica Argentina. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v74_n2_p207_Bunicontro |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Granulometry Input Patagonia Petrography Sands chemical composition coastal sediment depositional environment granulometry intertidal environment outcrop petrography provenance sand sorting texture Argentina Chubut Golfo Nuevo Patagonia |
| spellingShingle |
Granulometry Input Patagonia Petrography Sands chemical composition coastal sediment depositional environment granulometry intertidal environment outcrop petrography provenance sand sorting texture Argentina Chubut Golfo Nuevo Patagonia Bunicontro, M.P. Marcomini, S.C. Weiler, N.E. López, R.A. Quenardelle, S. Textural and compositional characterization and provenance analysis of beach sediments in golfo nuevo, chubut province |
| topic_facet |
Granulometry Input Patagonia Petrography Sands chemical composition coastal sediment depositional environment granulometry intertidal environment outcrop petrography provenance sand sorting texture Argentina Chubut Golfo Nuevo Patagonia |
| description |
A textural and compositional characterization of beach sediments in 17 coastal profiles is presented from cerro Prismático northward to cerro Avanzado southward, in the golfo Nuevo, Chubut province. The aim of this work is to establish the main input source of sediments to the littoral system and the factors controlling their texture and composition. This work deepens and advances on sediments knowledge of Argentinean coast, establishing an accurate and quantitative background for futures researches. High intertidal sediments are composed by sand (62%) and gravel (38%), showing poor sorting. Sediments from the low intertidal, backshore and coastal dune environments show well sorted sandy sediments (more than 90% on average). Petrographic composition is homogenous along the coast, mostly characterized on average by lithic fragments (35%), plagioclase (24%), quartz (23%), feldspar (6%) and alterites (5%). The rocky coastal outcrops present up between 40% and 70% of sand, according to various authors, and it is found that both the composition and the proportion of its majority components are equivalent to that presented for beach sands. Also, due to the golfo Nuevo is a partially protected environment and the absence of evidences of littoral drift as well as the absence of allochthonous fluvial input inside it, it is concluded that the main source of sand to the littoral system results from the erosion of the cliffs that dominate the coastal landscape (Gaiman and Puerto Madryn formations). © 2017, Asociacion Geologica Argentina. All rights reserved. |
| format |
JOUR |
| author |
Bunicontro, M.P. Marcomini, S.C. Weiler, N.E. López, R.A. Quenardelle, S. |
| author_facet |
Bunicontro, M.P. Marcomini, S.C. Weiler, N.E. López, R.A. Quenardelle, S. |
| author_sort |
Bunicontro, M.P. |
| title |
Textural and compositional characterization and provenance analysis of beach sediments in golfo nuevo, chubut province |
| title_short |
Textural and compositional characterization and provenance analysis of beach sediments in golfo nuevo, chubut province |
| title_full |
Textural and compositional characterization and provenance analysis of beach sediments in golfo nuevo, chubut province |
| title_fullStr |
Textural and compositional characterization and provenance analysis of beach sediments in golfo nuevo, chubut province |
| title_full_unstemmed |
Textural and compositional characterization and provenance analysis of beach sediments in golfo nuevo, chubut province |
| title_sort |
textural and compositional characterization and provenance analysis of beach sediments in golfo nuevo, chubut province |
| url |
http://hdl.handle.net/20.500.12110/paper_00044822_v74_n2_p207_Bunicontro |
| work_keys_str_mv |
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| _version_ |
1807316746365829120 |