Archive · collection · 1998

Composition of phosphate containing sediments and phosphatic grains from the Namibian shelf

Listed in PANGAEA

Recent phosphatic grains from diatomaceous oozes, as well as Pliocene grains from phosphatic sands of the Namibian shelf were studied by a scanning electron microscopy coupled with microprobe analysis.

Description

Lithification of the grains occurred together with changes in their composition and structure resulting from progressive phosphatization of biogenic material and partial crystallization of phosphatic matter, which is presented by three predominant forms: colloform, globular, and microcrystalline.

Recent grains and associated nodules are authigenic. Their structure and composition related to Pliocene redeposited grains, which might be generated under similar conditions.

Topics

From keywords: Earth & Environmental Science
Inferred from text: Microscopy 75%

Provenance · 1 source records, 8 field assertions

Source	Key	Last seen	Raw
PANGAEA	oai:pangaea.de:doi:10.1594/PANGAEA.760261	15 d ago	JSON v1

Field	Assertion	Extractor	Evidence
access_level	source · PANGAEA	connector:pangaea@1.0.0
concepts[field].local:field:earth-environmental	mapping · PANGAEA	connector:pangaea@1.0.0
concepts[modality].local:modality:microscopy	enrichment · PANGAEA	keyword-concept-rules@1.0.0	title+description (75%)
description	source · PANGAEA	connector:pangaea@1.0.0	/metadata/dc/description
license	source · PANGAEA	connector:pangaea@1.0.0	/metadata/dc/rights
publication_date	source · PANGAEA	connector:pangaea@1.0.0
spatial	source · PANGAEA	connector:pangaea@1.0.0
title	source · PANGAEA	connector:pangaea@1.0.0	/metadata/dc/title

Composition of phosphate containing sediments and phosphatic grains from the Namibian shelf

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