Distribution of glycerol dialkyl glycerol tetraether lipids along an altitudinal transect on Mt. Xiangpi, NE Qinghai-Tibetan Plateau, China
Distribution of glycerol dialkyl glycerol tetraether lipids along an altitudinal transect on Mt. Xiangpi, NE Qinghai-Tibetan Plateau, China
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DOI：
10.1016/j.orggeochem.2013.01.011
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发表时间：
2013-04-01
影响因子：
3
通讯作者：
He, Yuxin
中科院分区：
文献类型：
--
作者：
Liu, Weiguo;Wang, Huanye;He, Yuxin
甘油二烷基甘油四醚（GDGT）的分布可以反映大陆环境的变化。最近，分支GDGT（bGDGT）的分布已被提出作为一种新的工具，古高程重建。在这里，我们报告的变化，在TEX 86（86个碳原子的四醚指数）的异戊二烯GDGT（iGDGT）和MBT（甲基化的支链四醚指数）的bGDGT沿着海拔样带的山。青藏高原东北部的象皮。表层土壤的TEX 86和MBT值均随海拔高度呈显著线性下降（TEX 86：R-2 = 0.65; n = 50; MBT：R-2 = 0.69; n = 24）。我们认为，这两个指数与海拔高度之间的明显关系可能与温度有关。初步研究表明，TEX 86指数可作为青藏高原MBT指数以外的古高程指标。(c)2013爱思唯尔有限公司保留所有权利。
The distribution of glycerol dialkyl glycerol tetraethers (GDGTs) can reflect continental environmental changes. Recently, the distribution of branched GDGTs (bGDGTs) has been proposed as a novel tool for paleoelevation reconstructions. Here we report the variation in TEX86 (tetraether index of 86 carbon atoms) of isoprenoidal GDGTs (iGDGTs) and MBT (methylation of branched tetraether index) of bGDGTs along an altitudinal transect on Mt. Xiangpi, NE Qinghai-Tibetan Plateau. Both TEX86 and MBT values of surface soils showed significant linear decreases with altitude (TEX86: R-2 = 0.65; n = 50; MBT: R-2 = 0.69; n = 24). We suggest that the apparent relationships between the two indices and altitude may be related to temperature. Our preliminary investigation suggests that the TEX86 index can potentially be applied as a paleoelevation indicator in addition to the MBT index on the Qinghai-Tibetan Plateau. (c) 2013 Elsevier Ltd. All rights reserved.