Abstract
Pyrite rich in Zn, up to 3.1 wt%, was found in the TAG active mound of the TAG hydrothermal field, the slow-spreading Mid-Atlantic Ridge at 26°08′N and 44°49′W. The Zn-rich pyrite is characterized by an optical homogeneity, a homogeneous distribution of Zn in the back-scattered electron images, both at a magnification of about 500, a negative correlation between Fe and Zn contents of the pyrite and a rather small unit cell edge (a0 = 5.4117 ± 0.0008Å), strongly indicating that the detected Zn is present in the pyrite in solid solution. Such Zn concentrations are observed exclusively in dendritic pyrite, suggesting that the Zn-rich pyrite grew from hydrothermal fluids of a high degree of supersaturation due to quenching on the seafloor.
Original language | English |
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Pages (from-to) | 63-68 |
Number of pages | 6 |
Journal | Resource Geology |
Volume | 51 |
Issue number | 1 |
DOIs | |
Publication status | Published - Mar 1 2001 |
Externally published | Yes |
Keywords
- Dendritic growth texture
- Mid-Atlantic Ridge
- Solid solution
- TAG active mound
- TAG hydrothermal field
- Zn-rich pyrite
ASJC Scopus subject areas
- Geology
- Geochemistry and Petrology