应用于美国早期博物馆藏品的 "近似 "触发匹配年代测定法

IF 2 3区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

Radiocarbon Pub Date : 2024-01-23 DOI:10.1017/rdc.2023.127

Carla S Hadden, Katharine G Napora, Brent W Tharp

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引用次数: 0

摘要

树环序列的扭摆匹配测年法特别适用于在校准曲线出现逆转和高原的时期（如北美历史的整个后哥伦布时期）实现高分辨率测年。在此，我们介绍了一种经过改进的摆动匹配年代测定程序，该程序有助于对木质博物馆物品进行精确的年代测定，同时将破坏性取样造成的损害降至最低。我们介绍了两个案例研究，一个是独木舟，另一个是木槽，预计年代均为 18-19 世纪。(1) 为了保护这些易碎的物品，我们在没有或仅有极少表面处理的情况下，从裸露的、粗糙的木材横截面上对树年轮进行了计数和取样，以确定其年代；(2) 测定年代的重点是序列的最内侧和最外侧部分；(3) 由于计数和取样程序粗糙，我们使用简单的有序序列来近似地确定摇摆匹配，并将间隙定义为区间。在这两种情况下，最外圈的年代精度都达到了 30 年或更高，这证明了对欧洲接触后独木舟和其他类似物品进行摇摆匹配年代测定的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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“APPROXIMATE” WIGGLE-MATCH DATING APPLIED TO EARLY AMERICAN MUSEUM OBJECTS

Wiggle-match dating of tree-ring sequences is particularly promising for achieving high-resolution dating across periods with reversals and plateaus in the calibration curve, such as the entire post-Columbian period of North American history. Here we describe a modified procedure for wiggle-match dating that facilitates precise dating of wooden museum objects while minimizing damage due to destructive sampling. We present two case studies, a dugout canoe and wooden trough, both expected to date to the 18th–19th century. (1) Tree rings were counted and sampled for dating from exposed, rough cross-sections in the wood, with no or minimal surface preparation, to preserve these fragile objects; (2) dating focused on the innermost and outermost portions of the sequences; and (3) due to the crude counting and sampling procedures, the wiggle-match was approximated using a simple ordered Sequence, with gaps defined as Intervals. In both cases, the outermost rings were dated with precision of 30 years or better, demonstrating the potential of wiggle-match dating for post-European Contact canoes and other similar objects.

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来源期刊

Radiocarbon 地学-地球化学与地球物理

CiteScore

16.20

自引率

6.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Radiocarbon serves as the leading international journal for technical and interpretive articles, date lists, and advancements in 14C and other radioisotopes relevant to archaeological, geophysical, oceanographic, and related dating methods. Established in 1959, it has published numerous seminal works and hosts the triennial International Radiocarbon Conference proceedings. The journal also features occasional special issues. Submissions encompass regular articles such as research reports, technical descriptions, and date lists, along with comments, letters to the editor, book reviews, and laboratory lists.