English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Colloidal origin of microbands in banded iron formations

Egglseder, M., Cruden, A. R., Tomkins, A. G., Wilson, S. A., & Langendam, A. D. (2018). Colloidal origin of microbands in banded iron formations. Geochemical Perspectives Letters, 6, 43-49. doi:10.7185/geochemlet.1808.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files
hide Files
:
GPL1808_SI.pdf (Publisher version), 15MB
Name:
GPL1808_SI.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-

Locators

show

Creators

show
hide
 Creators:
Egglseder, Mathias1, Author              
Cruden, A. R., Author
Tomkins, A. G., Author
Wilson, S. A., Author
Langendam, A. D., Author
Affiliations:
1Damien Faivre, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863290              

Content

show
hide
Free keywords: banded iron formation, diagenesis, dissolution-precipitation creep, pressure solution, non-classical crystallisation, colloid, hematite, quartz, chert
 Abstract: Precambrian banded iron formations record the composition of Earth’s atmosphere and hydrosphere during the global rise of oxygen. It has been suggested that the banded texture of these rocks points to fluctuations in ocean chemistry although this remains a subject of debate. Here we show, by petrographic and electron microscopy of Palaeoproterozoic banded iron formations from the Hamersley Province, NW Australia, that not all iron oxide microbands represent primary sedimentary layers. Some iron oxide laminae are derived from abundant hematite particles that were originally encapsulated in chert layers and subsequently liberated by removal of quartz during post-depositional deformation by dissolution–precipitation creep. The liberated hematite particles progressively accumulated in layer-parallel aggregates forming microbands, with new hematite crystals forming via non-classical crystallisation pathways during diagenesis and metamorphism. Therefore, microbands do not necessarily correspond to fluctuations in the depositional environment.

Details

show
hide
Language(s): eng - English
 Dates: 2018-04-112018
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.7185/geochemlet.1808
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Geochemical Perspectives Letters
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Houten, NL : European Association of Geochemistry
Pages: - Volume / Issue: 6 Sequence Number: - Start / End Page: 43 - 49 Identifier: ISSN: 2410-339X