Detrital zircon data of DYZ borehole

Detrital zircons were concentrated by conventional magnetic separation and heavy-liquid methods and hand-picked under a binocular microscope. Zircons with diameters of 40–300 μm (mostly >100 μm) were selected to minimize potential input from eolian deposits. U–Pb dating was carried out at the Chronology Laboratory, Tianjin Geological Survey Center (China Geological Survey), using laser-ablation multi-collector inductively coupled plasma mass spectrometry (LA–MC–ICP–MS) with a laser spot diameter of 32 μm. For zircons younger than 10 Ma, ages were calculated from 238U/206Pb ratios; for zircons older than 10 Ma, ages were calculated from 207Pb/206Pb ratios. Grains with concordance <98% were excluded.