CHARACTERISTICS OF MAGNETITE IN SUBMARINE BASALTIC GLASS

被引:67
作者
PICK, T [1 ]
TAUXE, L [1 ]
机构
[1] UNIV CALIF SAN DIEGO,SCRIPPS INST OCEANOG,LA JOLLA,CA 92093
关键词
BASALTIC GLASS; MAGNETITE; ROCK MAGNETISM;
D O I
10.1111/j.1365-246X.1994.tb00917.x
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
We have compared the rock-magnetic characteristics of Cretaceous submarine basaltic glass (SBG) from DSDP/ODP Holes 417D, 418A, 807C and 543A to data from Holocene glasses from the East Pacific Rise. Both groups are very similar in that they contain single-domain, low-Ti magnetite as the carrier of a strong and stable remanent magnetization. The behaviour of magnetic hysteresis in SBG is, however, dominated by superparamagnetic grain-size populations. Transmission electron microscopy revealed spherically shaped grains of 10-20 nm diameter with crystal lattice properties consistent with magnetite. These grains could be responsible for the magnetic behaviour of SBG.
引用
收藏
页码:116 / 128
页数:13
相关论文
共 37 条
[31]   HIGH PALEOINTENSITIES OF THE GEOMAGNETIC-FIELD FROM THERMOMAGNETIC STUDIES ON RIFT-VALLEY PILLOW BASALTS FROM THE MID-ATLANTIC RIDGE [J].
PREVOT, M ;
MANKINEN, EA ;
GROMME, S ;
LECAILLE, A .
JOURNAL OF GEOPHYSICAL RESEARCH, 1983, 88 (NB3) :2316-2326
[32]   THE NATURE OF MAGNETIC SINGLE DOMAINS IN VOLCANIC GLASSES OF THE KBS TUFF [J].
SCHLINGER, CM ;
GRISCOM, D ;
PAPAEFTHYMIOU, GC ;
VEBLEN, DR .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1988, 93 (B8) :9137-9156
[34]  
STACEY FD, 1974, PHYSICAL PRINCIPLES
[35]  
Thellier E., 1959, ANN GEOPHYS, V15, P285
[36]   MAGNETIC HYSTERESIS IN NATURAL MATERIALS [J].
WASILEWSKI, PJ .
EARTH AND PLANETARY SCIENCE LETTERS, 1973, 20 (01) :67-72
[37]  
WORM HU, 1990, J APPL PHYS, V70, P5533