Testing the model for linking grain-size component to lake level status of modern clastic lakes
Testing the model for linking grain-size component to lake level status of modern clastic lakes
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测试将颗粒尺寸成分与现代碎屑湖湖水位状况联系起来的模型
DOI：
10.1016/j.quaint.2014.04.023
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发表时间：
2015-01
影响因子：
2.2
通讯作者：
Qin, X.G.
中科院分区：
文献类型：
--
作者：
Fan, J.W.;Zhai, D.Y.;Wen, R.L.;Qin, X.G.
在内蒙古岱海调查的基础上，提出了一种将粒度分量与湖泊水位状态联系起来的模型。为验证该模型，本文对代海东北500 km处的大理湖表层沉积物粒度组成进行了分区，并对其与湖面状态的关系进行了研究。结果表明，大理湖现代碎屑沉积物具有5种不同的粒度组分，代表了与岱海相同的湖内特定的沉积过程和沉积环境。这些成分被指定为长期悬浮粘土、海上悬浮细粉砂、海上悬浮中至粗粉砂、近岸悬浮细砂和近岸跳跃中砂。相比之下，在大理湖，近岸带的样品中缺乏更多的近海悬浮成分；近海和过渡带样品中分别出现较多的近岸悬浮和跃移成分；两个相邻的组分分离得很好。这些差异可能是由于湖泊地区出现的更强、更频繁的风产生了更高能的水力学。在此水力条件下，进入湖内的碎屑物质及其组成部分在湖内运移过程中会发生更严重的再加工，导致主要组成部分进一步向盆内运移，两个相邻组成部分更好地分离。近岸组分百分比与水深呈负相关，提示湖泊粒度组分-湖平面状态模型。将该模型应用于湖泊沉积物岩心，结果表明，岩心中近岸成分的高百分比与同一岩心的花粉剖面上重建的低降水相吻合。两个独立指标的重合表明，粒度组分-湖平面状态模型在湖泊古水文重建中具有广泛的适用性。
A model was proposed recently for linking grain-size component to lake level status based on investigations of Daihai Lake in Inner Mongolia. To test this model, grain-size components of the surface sediments of Dali Lake, 500 km northeast of Daihai Lake, were partitioned and their relationships with the lake level status were examined in this study. The data show that modern clastic sediments of Dali Lake contain five distinct grain-size components representing specific depositional processes and sedimentary environments within the lake in common with Daihai Lake. These components are specified as long-term suspension clay, offshore-suspension fine silt, offshore-suspension medium-to-coarse silt, nearshore-suspension fine sand and nearshore-saltation medium sand. In Dali Lake, by contrast, the offshore-suspension components are lacking in more samples from the nearshore zone; the nearshore-suspension and saltation components occur in more samples from the offshore and transitional zone, respectively; and two adjacent components are well separated. These differences would result from higher-energy hydraulics of Dali Lake generated by stronger and more frequent winds occurring in the lake region. Under this hydraulic condition, clastic materials entering the lake and the resultant components would be reworked more seriously during transportation within the lake, leading to further basin-ward transportations of the major components and better separations of two adjacent components. Percentage of the nearshore components is negatively related to water depth, suggesting the grain-size component–lake level status model for the lake. This model was applied to a sediment core from the lake, showing that high percentages of the nearshore components in the core coincide with low precipitations reconstructed on the pollen profile of the same core. The coincidence of two independent proxies demonstrates the wide applicability of the grain-size component–lake level status model to lake's paleohydrological reconstruction.
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影响因子：
3.5
作者：
K. Kranck;P. Smith;T. Milligan
通讯作者：
K. Kranck;P. Smith;T. Milligan
影响因子：
3.5
作者：
H. Tsoar;K. Pye
通讯作者：
H. Tsoar;K. Pye
影响因子：
2
作者：
D. Inman
通讯作者：
D. Inman
将现代碎屑湖的粒度成分与湖水位状况联系起来的模型
影响因子：
3
作者：
Zhou, Lang;Zhai, Dayou;Wen, Ruilin;Qin, Xiaoguang
通讯作者：
Qin, Xiaoguang
DOI：
10.2307/632883
发表时间：
1978
期刊：
--
影响因子：
--
作者：
G. Friedman;J. E. Sanders
通讯作者：
G. Friedman;J. E. Sanders