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GEOREF RECORD

Hadean zircon from a 3.3 Ga sandstone, Barberton greenstone belt, South Africa

Benjamin L. Byerly, Donald R. Lowe, Nadja Drabon, Matthew A. Coble, Dale H. Burns and Gary R. Byerly
Hadean zircon from a 3.3 Ga sandstone, Barberton greenstone belt, South Africa
Geology (Boulder) (September 2018) 46 (11): 967-970

Abstract

Hadean zircons hold the promise of providing a rare window into the crustal development and surface evolution of early Earth. To date, the only known sources of abundant Hadean zircons are sedimentary units in the Jack Hills and Mount Narryer regions of Western Australia. Here we describe a sedimentary layer, termed the Green Sandstone Bed, dated at ca. 3306 Ma, in the Barberton greenstone belt, South Africa, that contains abundant zircons ranging from 3300 to 4100 Ma, many of which predate the oldest known rocks in the greenstone belt at ca. 3550 Ma. This adds to a very small number of known Hadean zircon-bearing localities and is particularly important due to its low degree of thermal metamorphism (lower greenschist facies) and negligible strain. There is a high probability that primary mineral compositions of zircon and other heavy minerals present in this bed are well preserved.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 46
Serial Issue: 11
Title: Hadean zircon from a 3.3 Ga sandstone, Barberton greenstone belt, South Africa
Affiliation: Louisiana State University, Department of Geology and Geophysics, Baron Rouge, LA, United States
Pages: 967-970
Published: 20180927
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 35
Accession Number: 2018-080181
Categories: StratigraphyGeochronology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA Data Repository item 2018368
Illustration Description: illus. incl. geol. sketch map
S25°54'30" - S25°54'30", E31°02'45" - E31°02'45"
Secondary Affiliation: Stanford University, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201844
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