Snapshot of hot-spring sinter at Geyser Valley, Wairakei, New Zealand, following anthropogenic drawdown of the geothermal reservoir

被引：17
作者：
Watts-Henwood, Nick [1 ]
Campbell, Kathleen A. [1 ]
Lynne, Bridget Y. [2 ]
Guido, Diego M. [3 ]
Rowland, Julie V. [1 ]
Browne, Patrick R. L. [4 ]
机构：
[1] Univ Auckland, Sch Environm, Private Bag 92109, Auckland 1142, New Zealand
[2] Univ Auckland, Dept Engn Sci, Private Bag 92019, Auckland 1142, New Zealand
[3] CONICET UNLP, Inst Recursos Minerales, Calle 64 Esquina 120, RA-1900 La Plata, Buenos Aires, Argentina
[4] Univ Auckland, Inst Earth Sci & Engn, Private Bag 92019, Auckland 1142, New Zealand
来源：
GEOTHERMICS | 2017年 / 68卷
关键词：
Siliceous sinter; Geyserite; Particulate siliceous sediment (PSS); Geyser Valley; Taupo Volcanic Zone; New Zealand; TAUPO VOLCANIC ZONE; YELLOWSTONE-NATIONAL-PARK; SILICEOUS SINTER; OPAL-A; NORTH-ISLAND; MICROBIAL TEXTURES; HYDROTHERMAL FLOW; STEAM CONDENSATE; LOW-TEMPERATURE; RIFT SYSTEM;
D O I：
10.1016/j.geothermics.2017.03.002
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
From the 1950s, extraction of thermal fluids to generate electricity at Wairakei, Taupo Volcanic Zone, New Zealand, heralded a rapid transformation of surface manifestations at nearby Geyser Valley, 1 km NW of the power station. Active geysers and hot-springs fed by alkali-chloride waters ceased by 1968, replaced by acidic steam-dominated conditions. Field relationships indicate geothermal features are fault-controlled. Siliceous hot-spring (sinter) deposits represent spring-vent to distal marsh settings. The dominant mineralogy is opal-A, with some minor clay alteration. Some textures show silica dissolution and re-precipitation. Thus, only minor alteration and diagenesis has occurred, with vegetation overgrowing the extinct sinter. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：94 / 114
页数：21
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