Forensic isoscapes based on intra-individual temporal variation of δ^(18)O and ^(206)Pb/^(207)Pb in human teeth  

作　　者：Laura A.Regan Nathan W.Bower Samuel J.Brown Craig C.Lundstrom Gideon Bartov Matthew D.Cooney 

机构地区：[1]Office of Net Assessment,Department of Defense,Washington,DC,USA [2]Chemistry and Biochemistry Department,Colorado College,Colorado Springs,CO,USA [3]Geology Department,University of Illinois,Urbana,IL,USA [4]Information Technology Services,Colorado College,Colorado Springs,CO,USA

出　　处：《Forensic Sciences Research》2021年第1期42-52,共11页法庭科学研究（英文）

基　　金：The protocol was first approved(July 22,2005)by the US Department of the Air Force(Protocol FAC2005026H);Subsequently(October 11,2005);the Institutional Review Board(IRB)at the University of Florida,Gainesville,FL,USA approved the research(document IRB#474-2005);did the US Department of Veteran’s Affairs(October 19,2005,VA#0001).

摘　　要：Isotopic signatures used in the georeferencing of human remains are largely fixed by spatially distinct geologic and environmental processes.However,location-dependent temporal changes in these isotope ratios should also be considered when determining an individual’s provenance and/or trajectory.Distributions of the relevant isotopes can be impacted by predictable external factors such as climate change,delocalisation of food and water sources and changes in sources and uses of metals.Using Multi-Collector Inductively-Coupled Plasma Mass Spectrometer(MC-ICP-MS)analyses of ^(206)Pb/^(207)Pb in tooth enamel and dentin from a population of 21±1-year-old individuals born circa 1984 and isotope ratio mass spectrometry(IRMS)of δ^(18)O in their enamel,we examined the expected influence of some of these factors.The resulting adjustments to the geographic distribution of isotope ratios(isoscapes)found in tooth enamel and dentin may contain additional useful information for forensic identification,but the shifts in values can also impact the uncertainty and usefulness of identifications if they are not taken into account.

关 键 词：Forensic sciences DENTIN ENAMEL environmental GEOLOCATION isoscape radiogenic and stable isotopes 

分 类 号：D919[医药卫生—法医学]