Geothermal heat flow from borehole measurements at the margin of Princess Elizabeth Land (East Antarctic Ice Sheet)

IF 2.8 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Journal of Glaciology Pub Date : 2023-08-07 DOI:10.1017/jog.2023.43

P. Talalay, D. Gong, Xiaopeng Fan, Yazhou Li, G. Leitchenkov, B. Li, Nan Zhang, Rusheng Wang, Yang Yang, Jialin Hong

引用次数: 0

Abstract

A 198.8 m deep borehole was drilled through ice to subglacial bedrock in the northwestern marginal part of Princess Elizabeth Land, ~12 km south of Zhongshan Station, in January–February 2019. Three years later, in February 2022, the borehole temperature profile was measured, and the geothermal heat flow (GHF) was estimated using a 1-D time-dependent energy-balance equation. For a depth corresponding to the base of the ice sheet, the GHF was calculated as 72.6 ± 2.3 mW m−2 and temperature −4.53 ± 0.27°C. The regional averages estimated for this area based, generally, on tectonic setting vary from 55 to 66 mW m−2. A higher GHF is interpreted to originate mostly from the occurrence of metamorphic complexes intruded by heat-producing elements in the subglacial bedrock below the drill site.

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伊丽莎白公主地（南极东部冰盖）边缘钻孔测量的地热流

2019年1月至2月，在中山站以南约12公里的伊丽莎白公主地西北边缘，通过冰向冰下基岩钻了一个198.8米深的钻孔。三年后的2022年2月，测量了钻孔温度剖面，并使用一维时间相关能量平衡方程估计了地热流量（GHF）。对于与冰盖底部相对应的深度，GHF计算为72.6±2.3 mW m−2，温度为-4.53±0.27°C。通常，根据构造背景估计该地区的区域平均值在55至66 mW m–2之间。较高的GHF被解释为主要源于钻井现场下方冰下基岩中由产热元素侵入的变质杂岩的出现。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Glaciology 地学-地球科学综合

CiteScore

5.80

自引率

14.70%

发文量

101

审稿时长

6 months

期刊介绍： Journal of Glaciology publishes original scientific articles and letters in any aspect of glaciology- the study of ice. Studies of natural, artificial, and extraterrestrial ice and snow, as well as interactions between ice, snow and the atmospheric, oceanic and subglacial environment are all eligible. They may be based on field work, remote sensing, laboratory investigations, theoretical analysis or numerical modelling, or may report on newly developed glaciological instruments. Subjects covered recently in the Journal have included palaeoclimatology and the chemistry of the atmosphere as revealed in ice cores; theoretical and applied physics and chemistry of ice; the dynamics of glaciers and ice sheets, and changes in their extent and mass under climatic forcing; glacier energy balances at all scales; glacial landforms, and glaciers as geomorphic agents; snow science in all its aspects; ice as a host for surface and subglacial ecosystems; sea ice, icebergs and lake ice; and avalanche dynamics and other glacial hazards to human activity. Studies of permafrost and of ice in the Earth’s atmosphere are also within the domain of the Journal, as are interdisciplinary applications to engineering, biological, and social sciences, and studies in the history of glaciology.