Lithostratigraphic and geochronological framework for the paleoenvironmental reconstruction of the last ∼36 ka cal BP from a sediment record from Lake Iznik (NW Turkey)
Lithostratigraphic and geochronological framework for the paleoenvironmental reconstruction of the last ∼36 ka cal BP from a sediment record from Lake Iznik (NW Turkey)
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根据伊兹尼克湖（土耳其西北部）的沉积物记录重建最后 36 ka cal BP 的古环境的岩石地层和年代学框架
DOI：
10.1016/j.quaint.2012.06.006
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发表时间：
2012
影响因子：
2.2
通讯作者：
Melles
中科院分区：
文献类型：
--
作者：
Roeser;Ülgen;Hilgers;Wennrich;Viehberg;Çağatay;Melles
从伊兹尼克湖中部的两个地点回收了新的沉积物岩心，总体目标是重建马尔马拉地区过去的环境条件。这里展示的复合剖面 IZN09/LC2&LC3 涵盖了晚更新世到全新世的过渡（约 36 ka cal BP），这是迄今为止在该地区获得的最长的湖泊记录。岩石地层学和地质年代学框架为建立复合剖面奠定了基础，以便对古伊兹尼克湖进行首次推论。恢复的沉积记录被分为五个地层单元，这些单元可以在不同的取芯位置之间进行关联。所提出的年龄深度模型基于 1114C 日期（八个放射性碳测年水平）和两个火山灰层，并由三个 OSL 年龄支持。 Ca/Ti 比和磁化率的模拟年龄分布表示碳酸盐积累与碎屑沉积物输入平衡的变化。从 MIS 3 末期开始，碎屑输入较多，伊兹尼克湖在末次盛冰期 (LGM) 期间穿过低湖位，由滨岸沉积相和沉积速率降低所界定。之后c。 18 ka cal BP，原生碳酸盐沉积的开始可能与融水流入湖泊以及湖泊生产力的开始有关。从此时起，碳酸盐积累逐渐增加，并伴随着与新仙女木事件同时发生的铁硫化物层的出现。在全新世早期，该湖呈现出最低水位，这反映在最大碳酸盐产量上，随后湖水位在约 100 ℃ 上升。 9 ka cal BP 当它达到与现代情况类似的水平时。
New sediment cores were recovered from two sites in the central part of Lake Iznik with the overall aim of reconstructing past environmental conditions of the Marmara region. The composite profile presented here, IZN09/LC2&LC3, encompasses the late Pleistocene to Holocene transition (c. 36 ka cal BP) which is the longest lacustrine record in this region obtained to date. A lithostratigraphical and geochronological framework builds the basis to establish a composite section for first inferences on the paleo Lake Iznik. The recovered sedimentary record was divided into five stratigraphic units which can be correlated between the different coring locations. The proposed age-depth model is based on eleven14C dates (eight radiocarbon-dated levels) and two tephra layers, supported by three OSL ages. The modeled age distribution of the Ca/Ti ratio and magnetic susceptibility express variations in the carbonate accumulation in balance with clastic sediment input. Starting from the end of MIS 3 with high clastic input, Lake Iznik passed through a low lake-level during the Last Glacial Maximum (LGM), delineated by a sublitoral sedimentary facies, and reduced sedimentation rates. After c. 18 ka cal BP, the onset of primary carbonate deposition might be linked to meltwater inflow into the lake as well as onset of lake productivity. From this time onward, there is a gradual increase in carbonate accumulation punctuated by the occurrence of an iron-sulfidic layer which coincides with the Younger Dryas event. At the early Holocene, the lake presents a minimum level as reflected by the maximum carbonate production, followed by a lake level rise at c. 9 ka cal BP when it reached a level similar to the modern situation.
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影响因子：
2.2
作者：
F. Viehberg;U. B. Ülgen;E. Damcı;S. Franz;Sena Akçer Ön;P. Roeser;M. Çağatay;T. Litt;M. Melles
通讯作者：
F. Viehberg;U. B. Ülgen;E. Damcı;S. Franz;Sena Akçer Ön;P. Roeser;M. Çağatay;T. Litt;M. Melles
圣托里尼岛火山的放射性碳年代测定
影响因子：
64.8
作者：
H. Pichler;W. Friedrich
通讯作者：
W. Friedrich
DOI：
--
发表时间：
1960
期刊：
影响因子：
--
作者：
W. Nümann
通讯作者：
W. Nümann
伊兹尼克湖（土耳其西北部）过去约 4700 年的气候和环境演变
影响因子：
2.2
作者：
Ülgen;Biltekin;Cagatay;Roeser
通讯作者：
Roeser
来自马尔马拉海圣托里尼岛里瓦角喷发（22ka）的海洋火山灰
影响因子：
2.9
作者：
S. Wulf;M. Kraml;T. Kuhn;M. Schwarz;M. Inthorn;J. Keller;I. Kuşçu;P. Halbach
通讯作者：
P. Halbach