铅（Pb）同位素是示踪洋流和风化演变的重要指标，以往研究主要依赖于分辨率较低的铁锰结壳。近年来，大西洋和印度洋沉积物自生组分Pb同位素的研究在轨道和千年尺度上揭示了冰川活动和风化输入的变化，反映了区域风化过程对气候变化的敏感性，为理解全球海洋Pb循环及其与气候系统的相互作用提供了重要依据。然而，太平洋深水Pb同位
素如何响应短时间尺度的气候变化仍不清楚。文章以东赤道太平洋ODP 1241钻孔深海沉积物为研究对象，探讨了150 ka以来该区域深水Pb同位素组成特征及其物质来源。研究发现，深水Pb同位素组成主要受安第斯岛弧和中美洲火山弧风化输入的控制。尽管150 ka以来Pb同位素整体变化较小，且未呈现明显的冰期—间冰期变化模式，但在MIS 4和晚全新世出现更贫放射成因的信号，可能指示岛弧风化贡献的显著增强。结合太平洋主要水团的研究进一步表明，东赤道太平洋深水Pb同位素组成主要受局域物源控制，而非水团混合的结果。该研究为理解全球海洋Pb循环提供了新的约束。

Lead (Pb) isotopes serve as a critical tool for tracing theocean circulation and weathering evolution. Previous studies have primarily relied on low-resolution ferromanganese crusts. In recent years, investigations into the authigenic Pb isotopic compositions in sediments from the Atlantic and Indian Oceans have revealed variations in glacial activity and weathering inputs on orbital and millennial timescales, reflecting the sensitivity of regional weathering processes to climate change. These findings have provided important constraints for understanding the global marine Pb cycle and its interactions with the climate system. However, how deep water Pb isotopes respond to short-term climate changes in the Pacific remains poorly understood. This study focuses on deep-see sediments from ODP Site 1241 in the Eastern Equatorial Pacific (EEP) to explore the characteristics and sources of Pb isotopes over the past 150 ka. The results indicate that the Pb isotopic composition of deep water in study region is predominantly controlled by weathering inputs from the Andean volcanic arc and the Central American volcanic arc. Despite minimal overall variation in Pb isotope compositions over the past 150 ka and an absence of a clear glacial-interglacial pattern, a notable trend towards less radiogenic Pb isotope compositions during the MIS 4 and late Holocene may indicate a significant increase in the weathering of Central and South American arcs. Additional comparison with Pb isotopes of major water masses of the Pacific further demonstrates that the Pb isotopic composition of deep water in the EEP is primarily controlled by local sources rather than water mass mixing. These findings provide new insights into the global marine Pb cycle and highlight the importance of regional weathering processes in shaping deep-water Pb isotopic signatures.