Number of the records: 1

Cementation and blackening of Holocene sands by peat-derived humates: A case study from the Great Dune of Pilat, Landes des Gascogne, Southwestern France

SYSNO ASEP	0425586
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Cementation and blackening of Holocene sands by peat-derived humates: A case study from the Great Dune of Pilat, Landes des Gascogne, Southwestern France
Author(s)	Suchý, V. (CZ) Sýkorová, Ivana (USMH-B)_{RID, ORCID} Havelcová, Martina (USMH-B)_{RID, ORCID} Machovič, Vladimír (USMH-B) Zeman, Antonín (UTAM-F)_{RID, SAI} Trejtnarová, Hana (USMH-B)
Source Title	International Journal of Coal Geology. - : Elsevier - ISSN 0166-5162 Roč. 114, JUL (2013), s. 19-32
Number of pages	14 s.
Publication form	Print - P
Language	eng - English
Country	NL - Netherlands
Keywords	humate ; peat ; cementation ; aeolian sand
Subject RIV	DB - Geology ; Mineralogy
R&D Projects	GA205/09/1162 GA ČR - Czech Science Foundation (CSF)
	GA13-18482S GA ČR - Czech Science Foundation (CSF)
Institutional support	USMH-B - RVO:67985891 ; UTAM-F - RVO:68378297
UT WOS	000320497000002
EID SCOPUS	84877323170
DOI	10.1016/j.coal.2013.03.012
Annotation	The base sand layers of the aeolian Great Dune of Pilat, which stretches along the coast of Arcachon Bay, have been locally impregnated with a dark brown to black amorphous organic substance of humate composition. The humate-cemented sand forms a well-indurated horizon 40-50 cm in thickness that developed immediately beneath the Holocene peaty layer (P1 "paleosoil"). The humate, identified by means of FT-IR and Raman micro-spectroscopy, acted both as a cementing agent and as a coloring agent; it formed thin coats and meniscus cements between individual sandstone grains which, in turn, caused the dark, asphaltic-like appearance of the sandstone. Field observations, combined with geochemical analyses, and the presence of identical geochemical compounds recognized in the peat and sandstone humate cement, suggest that the peat-containing low-coalified (R-r = 0.2%) fragments of higher, submerged and floating plants and marine algae deposited in a saline and reducing environment served as an obvious source rock for the humate. The humate derived from decaying organic remains that descended from the peat into the permeable sand, where it indurated irreversibly over a period shorter than 3500 years.
Workplace	Institute of Rock Structure and Mechanics
Contact	Iva Švihálková, svihalkova@irsm.cas.cz, Tel.: 266 009 216
Year of Publishing	2014

Number of the records: 1