Fig. 1: Map of the study area showing sampling sites.
From: The Amazonian mangrove systems accumulate and release dissolved neodymium and hafnium to the oceans
a View of the study area on the North Brazil continental shelf (red rectangle). b Sampling stations of coastal surface seawater (orange circles) and sediment (grey circles) in Zone A and B. The Amazonian mangrove area between Zone A and B covers 2200 km2 along a coastline spanning 280 km. c Sampling sites across the Caeté River estuary (black circles) in three sections (fluvial, mangrove-fringed, coastal marine) indicated by yellow brackets. d Sampling sites of intertidal creek water (pink circles) and porewater in the mangrove area (red circles). Mangrove coverage is marked by the green area in panels a, b and c. Source map from ©2020 Google Earth (Fig. 1d). Figures were generated by QGIS.
