Age and smoothed natural gamma ray (NGR) data from core GLAD6 BOS04 5B

This dataset has been used in the framework of the REFINE project aiming to establish an age-depth model for Lake Bosumtwi (West Africa, Ghana) that bases on a combination of cyclostratigraphy and correlation analyses. For this the original NGR data obtained during the project for core GLAD6 BOS04 5B (also available at PANGAEA) have been smoothed using a 35 point mean and were correlated to Iberian Margin Sea Surface Temperatures (the tiepoints are also available at PANGAEA). This file contains the smoothed NGR data (and depths) and the correlative ages (linear interpolation between tiepoints). All original core data (GLAD6 BOS04 5B) have been retrieved in a ~4 cm resolution by the Continental Scientific Drilling Facility at the University of Minnesota, USA using a Geotek MSCL-S multisensor core logger equipped with a 3-inch diameter NaI(Tl) detector housed in a 6-inch diameter lead shield. Data are reported as total counts, integrating all emission counts over the gamma ray energy range between 0 and 3 MeV. For these measurements the archive core half has been used. Measurement uncertainties range between 5 and 10%. .

本数据集依托REFINE项目框架构建，该项目旨在为西非加纳的博苏姆推湖（Lake Bosumtwi）建立一套融合旋回地层学与对比分析的年龄-深度模型。为实现该目标，本项目针对GLAD6 BOS04 5B岩芯（亦可于PANGAEA平台获取）采集的原始自然伽马射线（Natural Gamma Ray, NGR）数据，经35点均值平滑处理后，与伊比利亚边缘海表温度数据进行对比关联（对比锚点亦可于PANGAEA平台获取）。本文件包含经平滑处理的NGR数据及对应深度，以及基于对比锚点线性插值得到的关联年龄。所有原始GLAD6 BOS04 5B岩芯数据以约4厘米的分辨率，由美国明尼苏达大学大陆科学钻探设施采集获取；该设施采用搭载于6英寸直径铅屏蔽罩内的3英寸直径NaI(Tl)探测器的Geotek MSCL-S型多传感器岩芯测井仪完成测量。数据以总计数形式报告，即对0至3 MeV伽马射线能量范围内的全部发射计数进行积分。本次测量使用的为岩芯归档半份样品。本次测量的不确定度介于5%至10%之间。