The Hyperspectral Analysis of the Mourne Mountains (HAMM) project was undertaken from 2020-2022 in Northern Ireland to integrate spectral, geochemical, and remote sensing data from an exposed, non-arid setting. Mourne Mountain Complex (MMC) samples were obtained by donation from the Geological Survey of Northern Ireland (GSNI) and the Sedgwick Museum (University of Cambridge) as well as from the field by the authors. Samples represent the 5 primary granite types (G1, G2, G3, G4, G5), other minor rock types, and alteration styles. Some sample donations were historic and exact locations unspecified. Their reported coordinates are best estimates from historic literature and projections to surface (see notes in the datasets).Whole rock samples were sent to ALS in Loughrea, Co. Galway for crushing and sodium peroxide fusion followed by mass spectrometry analysis for trace element data. Boron was obtained using glassless digestion. Fluorine and Cl were obtained by KOH fusion and ion chromatography. Sample splits were then fused into Li meta/tetra borate discs for major element oxides and also into pressed pellets for additional trace element analyses by X-ray fluorescence (XRF) at the Geological Survey Ireland's (GSI) Earth Surface Research Laboratory (ESRL) at Trinity College Dublin, Ireland. Both fused discs and pressed pellets were analysed using a PANanalytical Zetium WD XRF. Method codes are present under element headings to denote respective analytical method. Additional data such as REE chondrite normalisation (McDonough & Sun 1995); λ (O'Neill 2016); as well as Ce- and Eu-anomalies, and τ (Anenburg & Williams 2022) are also included.