OXYGEN ISOTOPES IN LIVING MAMMALS BONE PHOSPHATE - FURTHER RESULTS
OXYGEN ISOTOPES IN LIVING MAMMALS BONE PHOSPHATE - FURTHER RESULTS
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DOI：
10.1016/0168-9622(90)90007-y
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发表时间：
1990-12-10
期刊：
影响因子：
3.9
通讯作者：
LONGINELLI, A
中科院分区：
文献类型：
--
作者：
DANGELA, D;LONGINELLI, A
利用哺乳动物骨磷酸盐中的氧同位素研究古气候的可能性近年来得到了人们的认可。 某些哺乳动物的δ-O-18（PO_4 ~（3-））与当地大气降水的δ-O-18平均值有一定的相关性，且每种动物都表现出特定的线性关系。 本文报道了来自不同地区的鹿、鼠、牛、羊活体骨磷氧同位素组成的测定结果。 还测定了其中一些标本的体液（血液）的氧同位素组成。 骨磷酸盐的δ-O-18、血液的δ-O-18和当地大气降水的平均δ-O-18之间存在线性关系，与先前研究的人、猪和大鼠标本的情况相同。 骨磷-大气降水关系的计算方程的斜率如下：0.79（木鼠），1.01（牛），1.13（鹿）和1.48（羊）。 计算的磷酸盐-水分馏因子是相当均匀的，范围从1.0172到1.0175。 这些值非常接近骨磷酸盐和身体水之间的同位素平衡条件下计算的值。 从所研究的物种中提取的化石骨骼现在可用于古气候学和古水文学研究。
The potential use of oxygen isotopes in mammal bone phosphate to study paleoclimates has been recognized since a few years. It has been proven that the delta-O-18 (PO4(3-) of some mammal species is related to the mean delta-O-18 of local meteoric water, each species showing a specific linear relationship. We report here some measurements of the oxygen isotopic composition of bone phosphate from living specimens of deer, mice, cattle and sheep coming from different areas with different mean annual values of local meteoric water. The oxygen isotopic composition of body water (blood water) of some of these specimens has also been measured. Linear relationships between the delta-O-18 of bone phosphate, the delta-O-18 of blood water and the mean delta-O-18 of local meteoric water have been found, as in the case of the previously studied specimens of humans, pigs and rats. The slopes of the calculated equations for the bone phosphate-meteoric water relationships are the following: 0.79 (wood mice), 1.01 (cattle), 1.13 (deer) and 1.48 (sheep). The calculated phosphate-water fractionation factors are quite homogeneous, ranging from 1.0172 to 1.0175. These values are very close to those which may be calculated for isotopic equilibrium conditions between bone phosphate and body water. Fossil bones from the studied species may now be used for paleoclimatological and paleohydrological studies.