GEOLOGY, GEOCHEMISTRY, AND ORIGIN OF PLATINUM-GROUP ELEMENT CHROMITITE OCCURRENCES IN THE HEAZLEWOOD RIVER COMPLEX, TASMANIA

被引：60
|
作者：
PECK, DC [1 ]
KEAYS, RR [1 ]
机构：
[1] UNIV MELBOURNE,DEPT GEOL,PARKVILLE,VIC 3052,AUSTRALIA
来源：
ECONOMIC GEOLOGY AND THE BULLETIN OF THE SOCIETY OF ECONOMIC GEOLOGISTS | 1990年 / 85卷 / 04期
关键词：
D O I：
10.2113/gsecongeo.85.4.765
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：
Three distinctive chromitite occurrences are recognized from the Cambrian mafic-ultramafic Heazlewood River Complex, Tasmania. Type I chromitite represents very thin schlieren comprising Cr-rich spinel and is hosted by primitive, olivine-rich cumulates. Type II chromitite occurs as thicker schlieren containing more aluminous spinel and is hosted by an interlayered sequence of cumulate dunite and peridotite. Type III chromitite is more massive, occurring as irregular stringers, pods, and layers containing chromite having intermediate Cr/Al ratios. All of the chromitites display enrichment in platinum-group elements relative to the cumulate ultramafic sequences. -from Authors
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页码：765 / 793
页数：29
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