Rock magnetic, geochemical and sedimentological properties related to IRD composition and content of sediment core GeoB18530-1

The IRD-rich Heinrich Event (HE) layers of gravity core GeoB18530-1, retrieved from the SE Grand Banks slope of Newfoundland, coincide with bulk magnetic susceptibility maxima. This positive correlation of IRD content and susceptibility is widely observed and at first glance contradictive, since detrital dolomite, the most common IRD component, is weakly magnetic and should therefore reduce rather than enhance bulk magnetic susceptibility. As Part I of the associated manuscripts (Bukar et al., submitted) showed, the petrology of HLs is rather diverse; some prominent magmatic and metamorphic IRD species should actually have relatively high magnetic susceptibilities. This data set bundle comprises a collection of bulk rock magnetic, geochemical and sedimentological sediment records revealing the influence of specific magnetic mineral fractions, IRD lithologies and textural properties on the magnetic susceptibility signal. […]

来自纽芬兰东南大浅滩的GeoB18530-1重力岩心中的富含IRD（惰性岩屑）的Heinrich事件（HE）层，与总体磁化率最大值相吻合。这种IRD含量与磁化率的正相关关系普遍存在，乍看之下似乎存在矛盾，因为作为最常见的IRD成分的碎屑白云岩，其磁性较弱，理应降低而非增强总体磁化率。正如相关论文的第一部分（Bukar等，投稿中）所示，HLs（高地层）的岩石学特征相当多样；一些显著的火成岩和变质岩IRD种类实际上应具有相对较高的磁化率。本数据集集合包括一系列总体岩磁学、地球化学和沉积学的沉积记录，揭示了特定磁性矿物组分、IRD岩性和纹理特性对磁化率信号的影响。