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首页> 外文期刊>Lithology and mineral resources >Influence of the Grain Size Composition of Bottom Sediments in Lake Baikal on the Distribution of Methane and Sulfide Sulfur
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Influence of the Grain Size Composition of Bottom Sediments in Lake Baikal on the Distribution of Methane and Sulfide Sulfur

机译：贝氏湖底沉积物粒度组成对甲烷和硫化硫分布的影响

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摘要

Based on the study of separate areas of Lake Baikal (depth from 14 to 250 m), influence of the grain size composition of bottom sediments on the distribution of methane and sulfide sulfur is examined. Concentrations of the components varied, respectively, from 0.01 to 1.81 mu g/g d.s. (average 0.21 mu g/g d.s.) and from 0.002 to 0.384 mg/g d.s. (average 0.027 mg/g d.s.). Comparison of the distribution of methane and sulfide sulfur concentrations testifies to active sulfate reduction at the same stations, where methane concentrations are highest, precisely in the northern area of the lake marked by the inflow of the Verkhnyaya Angara and Kichera rivers, as well as at some stations of the profile deployed along the estuarine zone of the Selenga River and stations located in the sublacustrine wastewater discharge zone of the town of Baikal'sk and the Baikal'sk Pulp and Paper Mill (BPPM), which was closed in 2013. Depending on the study area and sampling point depth, the share of the sand fraction (0.05-2.0 mm) in bottom sediments varies from 23 to 99% (average 57%); the silt fraction (0.05-0.005 mm), from 1 to 73% (average 39%), and the pelite fraction (0.005 mm), from 0.0 to 8.7% (average 4%). Increase of the concentration of reduced gases in sediments correlates tightly with increase of the share of the fine-grained (silt and pelite) fractions. It is concluded that high or low concentrations of methane and sulfide sulfur at the studied upper intervals of sediments in Lake Baikal are caused not only by differences in the thickness of sediments subjected to the anthropogenic impact, but also by variations in depositional conditions that govern the grain size composition and, consequently, the content of organic matter and intensity of methane genesis and sulfate reduction.
机译：基于对贝加尔湖（深度14至250米）的单独区域的研究，研究了底部沉积物对甲烷和硫化硫的分布的影响。组分的浓度分别为<0.01至1.81μmg/ g d。 （平均0.21μg/ g d。）和0.002至0.384mg / g d。 （平均0.027mg / g d.s.）。甲烷和硫化硫浓度分布的比较证明了同一站的活性硫酸盐降低，其中甲烷浓度最高，精确地在湖泊的北部地区，标志着Verkhnyaya Angara和Kichera Rivers的流入，以及沿着Selenga River河和位于Baikal'sk镇的Selenga河流和站的河口区的河口区的一些站点部署，在2013年关闭的Baikal'sk纸浆和造纸厂（BPPM）。取决于在研究区和采样点深度，底部沉积物中的砂馏分（0.05-2.0mm）的份额从23％到99％（平均57％）。淤泥馏分（0.05-0.005mm），从1〜73％（平均39％）和百分点馏分（<0.005mm），为0.0-8.7％（平均4％）。沉积物中降低气体浓度的增加随着细菌（淤泥和百分之一）级分的份额的增加而紧密相关。得出结论是，在贝加尔湖沉积物的沉积物的高浓度和低浓度的甲烷和硫化硫含量不仅是逐渐受到人为影响的沉积物厚度的差异，还引起了治理的沉积条件的变化晶粒尺寸组成，因此，有机物物质含量和甲烷成因和硫酸盐的强度。

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  • 来源
    《Lithology and mineral resources》 |2019年第1期|53-65|共13页
  • 作者

    Fedorov Yu. A.; Garkusha D. N.; Tambieva N. S.; Andreev Yu. A.; Mikhailenko O. A.;

  • 作者单位

    Southern Fed Univ Inst Earth Sci Ul R Zorge 40 Rostov Na Donu 344090 Russia;

    Southern Fed Univ Inst Earth Sci Ul R Zorge 40 Rostov Na Donu 344090 Russia;

    Hydrochem Inst Pr Stachki 198 Rostov Na Donu 344090 Russia;

    Hydrochem Inst Pr Stachki 198 Rostov Na Donu 344090 Russia;

    Hydrochem Inst Pr Stachki 198 Rostov Na Donu 344090 Russia;

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