Geologic origin of magnetic volcanic glasses in the KBS tuff.

Charles M Schlinger, R. M. Smith, D. R. Veblen

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Volcanic glass shards and banded pumices from the KBS tuff of northern Kenya exhibit variation in magnetic susceptibility, and are colourless to dark brown. The darker glass shards exhibit superparamagnetism due to microcrystals of magnetite, approx 20-100 A in size. High T heating experiments on KBS shards support their origin as one of nucleation and growth (precipitation) in quenched homogeneous glass (colourless) at 700-1000oC during and immediately subsequent to eruption. Banded pumice, however, has both dark and colourless glasses of differing compositions. The pumice appears banded because precipitation occurred preferentially in the Fe-rich glass. The role played by magma mixing in the eruption of these materials is regarded as insignificant.-L.C.H.

Original languageEnglish (US)
Pages (from-to)959-962
Number of pages4
JournalGeology
Volume14
Issue number11
DOIs
StatePublished - Jan 1 1986
Externally publishedYes

Fingerprint

volcanic glass
tuff
glass
pumice
volcanic eruption
magnetic susceptibility
nucleation
magnetite
magma
heating
experiment

ASJC Scopus subject areas

  • Geology

Cite this

Geologic origin of magnetic volcanic glasses in the KBS tuff. / Schlinger, Charles M; Smith, R. M.; Veblen, D. R.

In: Geology, Vol. 14, No. 11, 01.01.1986, p. 959-962.

Research output: Contribution to journalArticle

Schlinger, Charles M ; Smith, R. M. ; Veblen, D. R. / Geologic origin of magnetic volcanic glasses in the KBS tuff. In: Geology. 1986 ; Vol. 14, No. 11. pp. 959-962.
@article{300740cf90214ec2a10cc1e09cda6a92,
title = "Geologic origin of magnetic volcanic glasses in the KBS tuff.",
abstract = "Volcanic glass shards and banded pumices from the KBS tuff of northern Kenya exhibit variation in magnetic susceptibility, and are colourless to dark brown. The darker glass shards exhibit superparamagnetism due to microcrystals of magnetite, approx 20-100 A in size. High T heating experiments on KBS shards support their origin as one of nucleation and growth (precipitation) in quenched homogeneous glass (colourless) at 700-1000oC during and immediately subsequent to eruption. Banded pumice, however, has both dark and colourless glasses of differing compositions. The pumice appears banded because precipitation occurred preferentially in the Fe-rich glass. The role played by magma mixing in the eruption of these materials is regarded as insignificant.-L.C.H.",
author = "Schlinger, {Charles M} and Smith, {R. M.} and Veblen, {D. R.}",
year = "1986",
month = "1",
day = "1",
doi = "10.1130/0091-7613(1986)14<959:GOOMVG>2.0.CO;2",
language = "English (US)",
volume = "14",
pages = "959--962",
journal = "Geology",
issn = "0091-7613",
publisher = "Geological Society of America",
number = "11",

}

TY - JOUR

T1 - Geologic origin of magnetic volcanic glasses in the KBS tuff.

AU - Schlinger, Charles M

AU - Smith, R. M.

AU - Veblen, D. R.

PY - 1986/1/1

Y1 - 1986/1/1

N2 - Volcanic glass shards and banded pumices from the KBS tuff of northern Kenya exhibit variation in magnetic susceptibility, and are colourless to dark brown. The darker glass shards exhibit superparamagnetism due to microcrystals of magnetite, approx 20-100 A in size. High T heating experiments on KBS shards support their origin as one of nucleation and growth (precipitation) in quenched homogeneous glass (colourless) at 700-1000oC during and immediately subsequent to eruption. Banded pumice, however, has both dark and colourless glasses of differing compositions. The pumice appears banded because precipitation occurred preferentially in the Fe-rich glass. The role played by magma mixing in the eruption of these materials is regarded as insignificant.-L.C.H.

AB - Volcanic glass shards and banded pumices from the KBS tuff of northern Kenya exhibit variation in magnetic susceptibility, and are colourless to dark brown. The darker glass shards exhibit superparamagnetism due to microcrystals of magnetite, approx 20-100 A in size. High T heating experiments on KBS shards support their origin as one of nucleation and growth (precipitation) in quenched homogeneous glass (colourless) at 700-1000oC during and immediately subsequent to eruption. Banded pumice, however, has both dark and colourless glasses of differing compositions. The pumice appears banded because precipitation occurred preferentially in the Fe-rich glass. The role played by magma mixing in the eruption of these materials is regarded as insignificant.-L.C.H.

UR - http://www.scopus.com/inward/record.url?scp=85047671265&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85047671265&partnerID=8YFLogxK

U2 - 10.1130/0091-7613(1986)14<959:GOOMVG>2.0.CO;2

DO - 10.1130/0091-7613(1986)14<959:GOOMVG>2.0.CO;2

M3 - Article

AN - SCOPUS:85047671265

VL - 14

SP - 959

EP - 962

JO - Geology

JF - Geology

SN - 0091-7613

IS - 11

ER -