Mineralogical and geochemical zoning of sediments at the Semenov cluster of hydrothermal fields, 13°31′-13°30′ N, Mid-Atlantic Ridge

被引：15
作者：
Rusakov, V. Yu. [1 ]
Shilov, V. V. [2 ]
Ryzhenko, B. N. [1 ]
Gablina, I. F. [3 ]
Roshchina, I. A. [1 ]
Kuz'mina, T. G. [1 ]
Kononkova, N. N. [1 ]
Dobretsova, I. G. [2 ]
机构：
[1] Russian Acad Sci, Vernadsky Inst Geochem & Analyt Chem, Moscow 119991, Russia
[2] Polar Marine Geol Prospecting Expedit, St Petersburg 188412, Russia
[3] Russian Acad Sci, Inst Geol, Moscow 119017, Russia
来源：
GEOCHEMISTRY INTERNATIONAL | 2013年 / 51卷 / 08期
基金：
俄罗斯基础研究基金会;
关键词：
ore-bearing and metalliferous sediments; atacamite; Semenov hydrothermal cluster; Mid-Atlantic Ridge; upper Pleistocene-Holocene; ORE-BEARING SEDIMENTS; MASSIVE SULFIDES; LUCKY STRIKE; DEPOSITS; SEAMOUNT; VENTS; TAG;
D O I：
10.1134/S0016702913050066
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：
New material from eight columns recovered during Cruise 32 of the R/V Professor Logachev in 2009 was used to explore the lithological facies, biostratigraphy, mineralogy, and geochemistry of sediments from the northwestern (active) and eastern (inactive) hydrothermal vent fields of the Semenov cluster. Mineral types of sediments were distinguished, and a general scheme was proposed for the vertical structure of the hydrothermal-sedimentary sequence overlying massive sulfide ores. It was found that the ore-bearing sediments exhibit a vertical zoning in the distribution of mineral assemblages, which are controlled by oxygen activity. The mechanisms of the formation of atacamite, CuCl2 center dot 3Cu(OH)(2), which is a widespread mineral in red iron-oxide bodies replacing sulfides (gossans), were evaluated.
引用
收藏
页码：646 / 669
页数：24
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