A Quantitative Tomotectonic Plate Reconstruction of Western North America and the Eastern Pacific Basin

The two plate model archives in this directory are linked to the paper (Geochemistry, Geophysics, Geosystems, in press): A Quantitative Tomotectonic Plate Reconstruction of Western North America and the Eastern Pacific Basin by Edward J. Clennett1, Karin Sigloch1, Mitchell G. Mihalynuk2, Maria Seton3, Martha A. Henderson2, Kasra Hosseini1,4, Afsaneh Mohammadzaheri1, Stephen T. Johnston5, and R. Dietmar Muller3 1. Department of Earth Sciences, University of Oxford, South Parks Road, Oxford OX1 3AN, UK 2. British Columbia Geological Survey, P.O. Box Stn Prov Govt, Victoria, BC, V8W 9N3, Canada 3. EarthByte Group, School of Geosciences, The University of Sydney, NSW 2006, Australia 4. The Alan Turing Institute, British Library, 96 Euston Road, London NW1 2DB, UK 5. Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3, Canada The zipped archive contains two plate models: Clennett_etal_2020_M2019.zip and Clennett_etal_2020_S2013.zip. The former is our model in the Müller et al. (2019) reference frame, and the latter is our model implemented into the Shephard et al. (2013) plate reconstruction. Both of these folders contain the same types of files: coastlines, plate boundaries, plate topologies, a rotation file and terrane shapefiles. To view the models, open GPlates (downloadable at: www.gplates.org), click 'File' > 'Open Project', navigate to the folder containing the desired model, and then click on the file Clennett_etal_2020_G3_XXXX.gproj. This will simultaneously open all the files that comprise the model. A layers panel will appear, with the option to turn on/off certain files. The view can be changed by clicking on the globe, and the model can be run by clicking the play button in the animation bar, starting from 170Ma. Features can be inspected by clicking the 'choose feature' tab, selecting a feature, and clicking 'query feature'. The files that comprise the model are described below: 1. Clennett_etal_2020_Coastlines.gpml: Coastlines used in the reconstruction. The coastlines of western North America and Mexico were edited from the global model to account for later terrane accretions. 2. Clennett_etal_2020_NAm_bounds.gpml: File containing the new plate boundaries digitised in this study. 3. Clennett_etal_2020_Plates.gpml: File containing the edited plate boundaries of the global model, as well as our new continuously-closing plate topologies. 4. Clennett_etal_2020_Rotations.rot: This is the rotation file that contains the relative motions between plates, terranes and plate boundaries for western North America and the eastern Pacific basin. The first column specifies the plate ID, the second column the timestep, the third, fourth and fifth columns are the latitude, longitude and angle of the stage rotations, and the sixth column is the plate that the feature moves relative to. Most lines are accompanied with a comment describing the rotation. 5. Clennett_etal_2020_Terranes.gpml: This file contains all the terranes shown in the model. We further divided these into superterranes, so that each can be coloured accordingly for better visualisation purposes: a. Angayucham.gpml b. Farallon.gpml c. Guerrero.gpml d. Insular.gpml e. Intermontane.gpml f. Kula.gpml g. North_America.gpml h. Western_Jurassic.gpml 6. Movie S1. Movie showing plate evolution at 1 million-year intervals, embedded within the Muller et al. (2019) global model. Blue boundaries are subduction zones, red boundaries are mid-ocean ridges, green boundaries are transform faults, and pink boundaries are other unspecified boundaries. Plates are not labelled but can be identified from figures 5-10. 7. Movie S2. Movie showing plate evolution at 1 million-year intervals, embedded within the Shephard et al. (2013) global model. Blue boundaries are subduction zones, red boundaries are mid-ocean ridges, green boundaries are transform faults, and pink boundaries are other unspecified boundaries. Plates are not labelled but can be identified from figures 5-10. The agegrids and spreading rate grids associated with this model can be accessed at: https://repo.gplates.org/webdav/PlateModel_Age_SR_Grids/Clennett_etal_2020_G3/ Revision log: Version 1.2: Removed subfolders "COBs" and "ContinentalPolygons" from Clennett_etal_2020_M2019.zip, which were added in Version 1.1. These files are not compatible with Clennett2020_M2019 model. Version 1.1: Added subfolders "COBs" and "ContinentalPolygons" into Clennett_etal_2020_M2019.zip. The newly added "COBs" and "ContinentalPolygons" files are the same with the ones in the "Alfonso2024" model.本目录下的两个板块模型归档文件关联于已接收待刊于《地球化学、地球物理学、地球系统（Geochemistry, Geophysics, Geosystems）》的论文：《北美西部与东太平洋盆地定量板块构造重建》（A Quantitative Tomotectonic Plate Reconstruction of Western North America and the Eastern Pacific Basin），作者为Edward J. Clennett¹、Karin Sigloch¹、Mitchell G. Mihalynuk²、Maria Seton³、Martha A. Henderson²、Kasra Hosseini¹,4、Afsaneh Mohammadzaheri¹、Stephen T. Johnston⁵以及R. Dietmar Muller³。 1. 英国牛津大学地球科学系，南园路，牛津OX1 3AN 2. 加拿大不列颠哥伦比亚省地质调查局，邮政信箱Stn Prov Govt，维多利亚，不列颠哥伦比亚省V8W 9N3 3. 澳大利亚悉尼大学地球科学学院EarthByte研究组，新南威尔士州2006 4. 英国艾伦·图灵研究所，大英图书馆，尤斯顿路96号，伦敦NW1 2DB 5. 加拿大阿尔伯塔大学地球与大气科学系，埃德蒙顿，阿尔伯塔省T6G 2E3 该压缩归档包含两个板块模型：Clennett_etal_2020_M2019.zip与Clennett_etal_2020_S2013.zip。前者为采用Müller等人（2019）参考框架的本研究模型，后者为嵌入Shephard等人（2013）板块重建框架的本研究模型。两个文件夹内的文件类型完全一致：海岸线数据、板块边界数据、板块拓扑数据、旋转文件以及地体形状文件（shapefile）。 若需查看模型，请打开GPlates（可从www.gplates.org下载），点击「文件」>「打开项目」，导航至目标模型所在文件夹，随后选择Clennett_etal_2020_G3_XXXX.gproj文件即可。该操作将同时加载构成该模型的全部文件。此时将弹出图层面板，可通过该面板开启或关闭特定文件。通过点击地球仪视图可调整视角，点击动画栏中的播放按钮即可运行模型，模拟起始时间为170Ma。可通过点击「选择要素」选项卡选中某一要素，再点击「查询要素」以查看其详细信息。 构成模型的各文件说明如下： 1. Clennett_etal_2020_Coastlines.gpml：本重建中使用的海岸线数据。针对后续地体增生情况，对全球模型中的北美西部与墨西哥海岸线进行了编辑修正。 2. Clennett_etal_2020_NAm_bounds.gpml：包含本研究中数字化得到的全新板块边界数据。 3. Clennett_etal_2020_Plates.gpml：包含经编辑的全球模型板块边界，以及本研究提出的全新连续闭合板块拓扑数据。 4. Clennett_etal_2020_Rotations.rot：该旋转文件包含北美西部与东太平洋盆地内板块、地体及板块边界间的相对运动信息。其第一列为板块ID（plate ID），第二列为时间步长，第三、四、五列分别为阶段旋转的纬度、经度与旋转角度，第六列为该要素相对运动所参照的板块。多数行附带注释，用于说明对应旋转参数。 5. Clennett_etal_2020_Terranes.gpml：该文件包含模型中展示的全部地体数据。为便于可视化展示，我们将其进一步划分为超级地体，以便为不同地体分配不同配色： a. Angayucham.gpml b. Farallon.gpml c. Guerrero.gpml d. Insular.gpml e. Intermontane.gpml f. Kula.gpml g. North_America.gpml h. Western_Jurassic.gpml 6. 补充材料S1（Movie S1）：展示板块演化过程的动画，时间间隔为1百万年，嵌入于Müller等人（2019）全球模型框架中。其中蓝色边界代表俯冲带，红色边界代表洋中脊，绿色边界代表转换断层，粉色边界代表其他未指定类型的边界。图中未标注板块，可通过图5至图10识别对应板块。 7. 补充材料S2（Movie S2）：展示板块演化过程的动画，时间间隔为1百万年，嵌入于Shephard等人（2013）全球模型框架中。其中蓝色边界代表俯冲带，红色边界代表洋中脊，绿色边界代表转换断层，粉色边界代表其他未指定类型的边界。图中未标注板块，可通过图5至图10识别对应板块。 本模型关联的年龄网格与扩张速率网格可通过以下链接获取：https://repo.gplates.org/webdav/PlateModel_Age_SR_Grids/Clennett_etal_2020_G3/ 修订日志： 版本1.2：移除了Clennett_etal_2020_M2019.zip中的「COBs」与「ContinentalPolygons」子文件夹——该子文件夹于版本1.1中新增，但与本模型不兼容。 版本1.1：于Clennett_etal_2020_M2019.zip中新增「COBs」与「ContinentalPolygons」子文件夹，新增的这两类文件与「Alfonso2024」模型中的对应文件完全一致。