Hydrothermal formation of Fe-oxide bands in zebra rocks from northern Western Australia
Hydrothermal formation of Fe-oxide bands in zebra rocks from northern Western Australia
复制标题
西澳大利亚北部斑马岩中铁氧化物带的热液形成
DOI:
10.1016/j.chemgeo.2021.120699
复制
发表时间:
2022
期刊:
影响因子:
3.9
通讯作者:
Kuma Ryusei
中科院分区:
文献类型:
--
作者:
Kawahara Hirokazu;Yoshida Hidekazu;Yamamoto Koshi;Katsuta Nagayoshi;Nishimoto Shoji;Umemura Ayako;Kuma Ryusei
Zebra rock, found in the eastern Kimberley region of northern Western Australia, is a Late Proterozoic sedimentary rock with a rhythmic Liesegang-type Fe-oxide banding. The striped rhythmic pattern in sedimentary rocks is an important key to infer chemical conditions of water-rock reactions. Although past studies have discussed the zebra rock formation for decades, the process remains unclear. Here, we introduce a new formation model, suggesting that zebra rock formed in an acidic hydrothermal system and that pH buffering of Fe2+-bearing acidic fluid, in a neutralization reaction with primary carbonate minerals, induced rhythmic Fe-precipitation. The Fe profile clearly shows a reaction front, indicating unidirectional diffusive fluid migration along bedding planes. The two types of zebra rock distinguished by color and by clay mineral assemblages correspond with typical acidic hydrothermal alteration zonation. Although a specific volcanic event related to the hydrothermal activity cannot be identified presently, this study provides a new model for the zebra rock, recording both hydrothermal alteration and post-Late Proterozoic fluid migration.
登录
查看更多内容
影响因子:
1.2
作者:
F. Loughnan;F. I. Roberts
通讯作者:
F. I. Roberts
DOI:
--
发表时间:
2003
期刊:
--
影响因子:
--
作者:
E. Mattievich;J. Chadwick;J. Cashion;J. F. Boas;M. J. Clark;R. Mackie
通讯作者:
R. Mackie
影响因子:
3.9
作者:
Yoshida Hidekazu;Katsuta Nagayoshi;Sirono Sin-iti;Nishimoto Shoji;Kawahara Hirokazu;Metcalfe Richard
通讯作者:
Metcalfe Richard
影响因子:
4.6
作者:
U. Kelka;M. Veveakis;D. Koehn;N. Beaudoin
通讯作者:
N. Beaudoin
影响因子:
3.4
作者:
Katsuta Nagayoshi;Miyata Yoshiki;Murakami Takuma;Mino Yoshihisa;Naito Sayuri;Yasuda Koji;Ochiai Shinya;Abe Osamu;Yasuda Atsushi;Morimoto Maki;Kawakami Shin-ichi;Nagao Seiya
通讯作者:
Nagao Seiya