Mineralogy and geochemistry of alteration products in DSDP Leg 81 Holes

Alteration products of basalts from the four holes drilled during Leg 81 were studied and found to be characterized by the widespread occurrence of trioctahedral clay minerals (Mg smectite to chlorite). In some cases zeolites (analcite, chabazite) are associated with the saponite. A more oxidizing s...

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Main Authors: Desprairies, Alain, Bonnot-Courtois, Chantal, Jehanno, Celestine, Vernhet, S, Joron, Jean Louis
Format: Dataset
Language:English
Published: PANGAEA 1984
Subjects:
Deep Sea Drilling Project
DSDP
Northeast Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.806988
https://doi.org/10.1594/PANGAEA.806988
id ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.806988
record_format openpolar
spelling ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.806988 2023-05-15T17:41:23+02:00 Mineralogy and geochemistry of alteration products in DSDP Leg 81 Holes Desprairies, Alain Bonnot-Courtois, Chantal Jehanno, Celestine Vernhet, S Joron, Jean Louis MEDIAN LATITUDE: 56.167262 * MEDIAN LONGITUDE: -23.032400 * SOUTH-BOUND LATITUDE: 56.042700 * WEST-BOUND LONGITUDE: -23.528200 * NORTH-BOUND LATITUDE: 56.561700 * EAST-BOUND LONGITUDE: -20.782200 * DATE/TIME START: 1981-07-31T00:00:00 * DATE/TIME END: 1981-08-31T00:00:00 1984-02-08 application/zip, 8 datasets https://doi.pangaea.de/10.1594/PANGAEA.806988 https://doi.org/10.1594/PANGAEA.806988 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.806988 https://doi.org/10.1594/PANGAEA.806988 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Desprairies, Alain; Bonnot-Courtois, Chantal; Jehanno, Celestine; Vernhet, S; Joron, Jean Louis (1984): Mineralogy and geochemistry of alteration products in Leg 81 basalts. In: Roberts, DG; Schnittker, D; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 81, 733-742, https://doi.org/10.2973/dsdp.proc.81.128.1984 Deep Sea Drilling Project DSDP Dataset 1984 ftpangaea https://doi.org/10.1594/PANGAEA.806988 https://doi.org/10.2973/dsdp.proc.81.128.1984 2023-01-20T07:32:53Z Alteration products of basalts from the four holes drilled during Leg 81 were studied and found to be characterized by the widespread occurrence of trioctahedral clay minerals (Mg smectite to chlorite). In some cases zeolites (analcite, chabazite) are associated with the saponite. A more oxidizing stage is marked by a saponite-celadonite association, presenting the geochemical characteristics of hydrothermal processes. Later stages of alteration are represented by palagonitization and subaerial weathering at two sites. These different alteration processes of basalts from Leg 81 record the paleoenvironment during the first opening stages of the Northeast Atlantic Ocean in the Paleocene-Eocene periods. Dataset Northeast Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-23.528200,-20.782200,56.561700,56.042700)
institution Open Polar
collection PANGAEA - Data Publisher for Earth & Environmental Science
op_collection_id ftpangaea
language English
topic Deep Sea Drilling Project
DSDP
spellingShingle Deep Sea Drilling Project
DSDP
Desprairies, Alain
Bonnot-Courtois, Chantal
Jehanno, Celestine
Vernhet, S
Joron, Jean Louis
Mineralogy and geochemistry of alteration products in DSDP Leg 81 Holes
topic_facet Deep Sea Drilling Project
DSDP
description Alteration products of basalts from the four holes drilled during Leg 81 were studied and found to be characterized by the widespread occurrence of trioctahedral clay minerals (Mg smectite to chlorite). In some cases zeolites (analcite, chabazite) are associated with the saponite. A more oxidizing stage is marked by a saponite-celadonite association, presenting the geochemical characteristics of hydrothermal processes. Later stages of alteration are represented by palagonitization and subaerial weathering at two sites. These different alteration processes of basalts from Leg 81 record the paleoenvironment during the first opening stages of the Northeast Atlantic Ocean in the Paleocene-Eocene periods.
format Dataset
author Desprairies, Alain
Bonnot-Courtois, Chantal
Jehanno, Celestine
Vernhet, S
Joron, Jean Louis
author_facet Desprairies, Alain
Bonnot-Courtois, Chantal
Jehanno, Celestine
Vernhet, S
Joron, Jean Louis
author_sort Desprairies, Alain
title Mineralogy and geochemistry of alteration products in DSDP Leg 81 Holes
title_short Mineralogy and geochemistry of alteration products in DSDP Leg 81 Holes
title_full Mineralogy and geochemistry of alteration products in DSDP Leg 81 Holes
title_fullStr Mineralogy and geochemistry of alteration products in DSDP Leg 81 Holes
title_full_unstemmed Mineralogy and geochemistry of alteration products in DSDP Leg 81 Holes
title_sort mineralogy and geochemistry of alteration products in dsdp leg 81 holes
publisher PANGAEA
publishDate 1984
url https://doi.pangaea.de/10.1594/PANGAEA.806988
https://doi.org/10.1594/PANGAEA.806988
op_coverage MEDIAN LATITUDE: 56.167262 * MEDIAN LONGITUDE: -23.032400 * SOUTH-BOUND LATITUDE: 56.042700 * WEST-BOUND LONGITUDE: -23.528200 * NORTH-BOUND LATITUDE: 56.561700 * EAST-BOUND LONGITUDE: -20.782200 * DATE/TIME START: 1981-07-31T00:00:00 * DATE/TIME END: 1981-08-31T00:00:00
long_lat ENVELOPE(-23.528200,-20.782200,56.561700,56.042700)
genre Northeast Atlantic
genre_facet Northeast Atlantic
op_source Supplement to: Desprairies, Alain; Bonnot-Courtois, Chantal; Jehanno, Celestine; Vernhet, S; Joron, Jean Louis (1984): Mineralogy and geochemistry of alteration products in Leg 81 basalts. In: Roberts, DG; Schnittker, D; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 81, 733-742, https://doi.org/10.2973/dsdp.proc.81.128.1984
op_relation https://doi.pangaea.de/10.1594/PANGAEA.806988
https://doi.org/10.1594/PANGAEA.806988
op_rights CC-BY-3.0: Creative Commons Attribution 3.0 Unported
Access constraints: unrestricted
info:eu-repo/semantics/openAccess
op_rightsnorm CC-BY
op_doi https://doi.org/10.1594/PANGAEA.806988
https://doi.org/10.2973/dsdp.proc.81.128.1984
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