Hemispheric geochemical dichotomy of the mantle is a legacy of austral supercontinent assembly and onset of deep continental crust subduction

The goal of the paper is to relate the geochemical enrichment observed in southern hemisphere hotspots to deep subduction of continental crust during southern hemisphere assembly of Gondwana and Pangaea from 650-300 Ma. There are no new geochemical measurements made in the paper. However, the dataset provided to EarthChem provides shapefiles for use in GPlates that allows the reader to reconstruct the calculations made in the paper. The dataset also provides text (and associated references) used to compile the geochemical dataset, plume advection models, and the passive margin database. The dataset provided to EarthChem also includes the following tables provided in the paper:
-->Table S1. Data for 58 known hotspots (46 oceanic and 12 continental hotspots) summarized from Jackson et al. (Jackson et al., 2021).
-->Table S2. Area normalized paleolatitude from 1000-520 Ma.
-->Table S3. Passive margins of the past billion years, described in the supplementary text by ID number with references.
-->Table S4. Summed length of passive margins and passive margin terminations.
-->Table S5. Low temperature/pressure, ultrahigh pressure metamorphism (Brown & Johnson, 2019) with reconstructed paleolatitudes at 5° resolution from GPlates using Plate IDs and rotation files from Merdith et al. (2021), with modifications of Paleozoic terranes in Asia from Domeier (Domeier, 2018) and Mesoproterozoic of Laurentia from Swanson-Hysell et al. (2019).

该论文旨在将观测到的南半球热点地区的地球化学富集现象与冈瓦纳和泛古陆在650-300百万年前南半球聚合过程中的深部大陆地壳俯冲作用联系起来。论文中未进行新的地球化学测量。然而，提供给地球化学的数据集提供了用于GPlates的Shapefiles，使得读者能够重建论文中所述的计算。该数据集还提供了用于汇编地球化学数据集、羽流对流模型以及被动大陆边缘数据库的文本（及相关参考文献）。提供给地球化学的数据集还包括论文中提供的以下表格：

-->表S1：从Jackson等人（Jackson et al., 2021）总结的58个已知热点数据（46个海洋热点和12个大陆热点）。
-->表S2：1000-520百万年的面积归一化古纬度。
-->表S3：过去数十亿年的被动大陆边缘，通过ID编号及其参考文献在补充文本中进行描述。
-->表S4：被动大陆边缘及其终点的总长度。
-->表S5：低温/低压、超高压变质作用（Brown & Johnson, 2019）的重建古纬度，使用GPlates在5°分辨率下通过板块ID和Merdith等人（2021）的旋转文件进行，并对亚洲古生代地盾（Domeier, 2018）和劳伦西亚的中元古宙（Swanson-Hysell et al., 2019）进行了修改。