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

来源：

GEOPHYSICAL JOURNAL INTERNATIONAL | 1994年 / 119卷 / 01期

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

页码：116 / 128

页数：13

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