Freshening of near-bottom waters in Lake Baikal triggered by the Mw6.2 Kultuk earthquake of August 2008
Freshening of near-bottom waters in Lake Baikal triggered by the Mw6.2 Kultuk earthquake of August 2008
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2008 年 8 月 Mw6.2 库尔图克地震引发贝加尔湖近湖底水域的净化
DOI：
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发表时间：
2012
影响因子：
2.1
通讯作者：
R. Y. Gnatovskiy
中科院分区：
文献类型：
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作者：
N. Granin;N. Radziminovich;L. Granina;V. Blinov;R. Y. Gnatovskiy
2008年9月，贝加尔湖南部西部近底水出现变新鲜现象，悬浮物浓度增加。总溶解固形物含量降低约0.4 ~ 0.7 mg/kg(0.7%)，平均悬浮颗粒浓度大幅上升至6 ~ 9 mg/l，背景值为0.2 mg/l。这些水域的空间分布与2008年8月27日发生的Mw6.2 Kultuk地震的震源区域几乎相同。有人认为这两种现象之间存在因果关系。大量（约20立方千米）近底水的变新鲜可能是由于怀疑在该地区发生的甲烷气体水合物的解离作用，导致底部沉积物中矿化程度较差的孔隙水的输入。震源辐射的能量比解释观测到的近底水变新鲜所需的能量小4个数量级。这指出了在Kultuk地震的情况下，导致地震引起的沉积物破坏和随后可能的水合物分离的其他机制。
In September 2008, freshening of near-bottom water and an increase in concentration of suspended particles were observed in the western part of southern Lake Baikal. The reduction in the content of total dissolved solids was about 0.4–0.7 mg/kg (0.7 %), and average suspended particle concentration increased strongly to 6–9 mg/l, the background value being 0.2 mg/l. The spatial distribution of these waters was virtually identical to the focal area of the Mw6.2 Kultuk earthquake that occurred on 27 August 2008. It is suggested that there was a causal relationship between these two phenomena. Freshening of a significant amount (about 20 km3) of near-bottom waters was plausibly caused by an input of poorly mineralized pore waters from bottom sediments as a result of dissociation of methane gas hydrates suspected to occur in the area. The energy radiated by the earthquake source was four orders of magnitude smaller than that needed to explain the observed freshening of near-bottom waters. This points to other mechanisms leading to seismic-induced sediment failure and possible subsequent hydrate dissociation in the case of the Kultuk earthquake.
阿塞拜疆达什吉尔泥火山的长期现场监测：地震活动、孔隙压力瞬变和甲烷排放之间的联系
影响因子：
2.3
作者：
Delisle;Panahi;Aliyev;Guliyev
通讯作者：
Guliyev