Millière Laure, Spangenberg Jorge E, Bindschedler Saskia, Cailleau Guillaume, Verrecchia Eric P
Institute of Geology and Paleontology, University of Lausanne, Anthropole, Lausanne, Switzerland.
Isotopes Environ Health Stud. 2011 Sep;47(3):341-58. doi: 10.1080/10256016.2011.601305.
Stable carbon and oxygen isotope analyses were conducted on pedogenic needle fibre calcite (NFC) from seven sites in areas with roughly similar temperate climates in Western Europe, including the Swiss Jura Mountains, eastern and southern France, northern Wales, and north-eastern Spain. The δ(13)C values (-12.5 to-6.8 ‰ Vienna Pee Dee Belemnite (VPDB)) record the predominant C(3) vegetation cover at the sites. A good correlation was found between mean monthly climatic parameters (air temperature, number of frost days, humidity, and precipitation) and δ(18)O values (-7.8 to-3.4‰ VPDB) of all the NFC. Similar seasonal variations of δ(18)O values for monthly NFC samples from the Swiss sites and those of mean monthly δ(18)O values of local precipitation and meteorological data point out precipitation and preferential growth/or recrystallisation of the pedogenic needle calcite during dry seasons. These covariations indicate the potential of stable isotope compositions of preserved NFC in fossil soil horizons as a promising tool for palaeoenvironmental reconstructions.
对来自西欧气候大致相似的温带地区七个地点的成土针状纤维方解石（NFC）进行了稳定碳和氧同位素分析，这些地点包括瑞士汝拉山脉、法国东部和南部、威尔士北部以及西班牙东北部。δ(13)C值（-12.5至-6.8‰维也纳皮迪贝伦尼特（VPDB））记录了这些地点主要的C(3)植被覆盖情况。在所有NFC的月平均气候参数（气温、霜冻天数、湿度和降水量）与δ(18)O值（-7.8至-3.4‰ VPDB）之间发现了良好的相关性。来自瑞士地点的月NFC样品的δ(18)O值以及当地降水量和气象数据的月平均δ(18)O值的类似季节变化表明，在旱季期间存在降水以及成土针状方解石的优先生长/再结晶。这些协变表明，化石土壤层中保存的NFC的稳定同位素组成有潜力成为古环境重建的一种有前景的工具。
