Peridotite xenoliths from the northern North China Craton (NCC) are characterized by lithological and chemical heterogeneity, related to mantle accretion and metasomatism. However, the accretion mechanism and origin of metasomatic agent are contentious. Here, we report the petrology, whole-rock major elements and ReOs isotopes, and in situ mineral major- and trace-elements as well as Sr isotopic compositions for peridotite xenoliths in the Nangaoya area to evaluate the evolution of the lithospheric mantle beneath the northern NCC. Nangaoya peridotites can be divided into Group A harzburgites and Group B lherzolites. Group A harzburgites are refractory with high Fo contents (91.8–92.9) in olivine and have low whole-rock ¹⁸⁷Os/¹⁸⁸Os ratios of 0.11418, giving ~2.1 Ga T_RD age. Clinopyroxenes in Group A show enrichment of incompatible element with low Ti/Eu and high (La/Yb)_N ratios. These characteristics indicate that Group A harzburgites should be the relics of the Archean–Paleoproterozoic “cratonic” mantle and witness carbonatite metasomatism with its agent from asthenosphere. Comparatively, Group B lherzolites are transitional with low Fo contents (90.2–91.9) in olivine and have high whole-rock ¹⁸⁷Os/¹⁸⁸Os ratios (0.11635–0.112502), giving 1.8–1.2 Ga T_RD age. Thus, these lherzolites are considered as accretive mantle components formed by the cooling and re-extracting of the upwelling asthenosphere related to the collision of Eastern and Western blocks. Furthermore, Group B lherzolites can be subdivided into two sub-groups. Group B1 clinopyroxenes without sieve-textured rims are depleted in incompatible element, which was interpreted as weak or without metasomatism, whereas those in Group B2 lherzolites with sieve-textured rims display enriched light rare earth elements (LREE) and various trace element patterns, resulted from different types of strong metasomatism. Clinopyroxenes in Group B2–1 exhibit depletion of high field strength elements (HFSE), with high Ti/Eu but low (La/Yb)_N ratios, and the cores of them have higher ⁸⁷Sr/⁸⁶Sr ratios (0.70355–0.70443) than the rims (0.70352–0.70406), demonstrating that Group B2–1 lherzolites may have witnessed hydrous CO₂-rich silicate metasomatism from subducted plates in cores and a new stage silicate melt metasomatism from asthenosphere in rims. Group B2–2 lherzolites just record later silicate melt metasomatism. These two stage metasomatisms may be triggered by the mantle accretion events in response to the peripheral subduction in the northern NCC during the Phanerozoic. Based on the above results, we suggest that the lithospheric mantle beneath the Nangaoya area underwent multiple modifications through crust–mantle recycling or asthenosphere–lithosphere interaction related to subduction/collision processes, which plays important roles in the evolution of the mantle in the northern NCC.

华北克拉通北部（NCC）的橄榄岩异岩具有特征性的岩性和化学异质性，与地幔吸积和交代作用有关。但是，交代体的积累机制和起源尚存争议。在这里，我们报告了南高崖地区橄榄岩异种岩的岩石学，全岩主要元素和Re Os同位素，以及原位矿物主要元素和痕量元素以及Sr同位素组成，以评估该盆地下方岩石圈地幔的演化。北部NCC。Nangaoya橄榄岩可分为A组Harzburgites和B B组锂铁矿。A组harzburgite的耐火材料在橄榄石中具有较高的Fo含量（91.8–92.9），并且全岩石的¹⁸⁷ Os / ¹⁸⁸ Os比率较低，为0.11418，从而获得约2.1 Ga T_RD年龄。A组中的次氯环丁烯以低Ti / Eu和高（La / Yb）_N比显示出不相容元素的富集。这些特征表明，A组的哈兹伯格人应该是太古宙—古古生界“克拉通”地幔的遗迹，并见证了软流圈的碳酸盐交代作用。相比之下，B组橄榄石在橄榄石中具有低的Fo含量（90.2–91.9）过渡，并且具有较高的全岩¹⁸⁷ Os / ¹⁸⁸ Os比率（0.11635–0.112502），从而获得1.8–1.2 Ga T _RD年龄。因此，这些锂铁矿被认为是由与东部和西部地块碰撞有关的上升流软流层的冷却和再抽出而形成的增生地幔组分。此外，B组锂沸石可细分为两个亚组。没有筛网状边缘的B1类斜辉石被不相容元素耗尽，这被解释为弱或没有交代作用，而筛网状边缘的B2组锂沸石则显示出丰富的轻稀土元素（LREE）和多种痕量元素模式。来自不同类型的强烈交代。B2-1组中的斜茂铁表现出高场强元素（HFSE）的损耗，其中Ti / Eu高，但_N（La / Yb）比率低，并且它们的核心具有更高的⁸⁷ Sr /比边缘（0.70352-0.70406）的⁸⁶ Sr比（0.70355–0.70443）表明B2–1组蛇绿岩可能见证了含水CO ₂岩心俯冲板中富含硅酸盐的交代作用和轮缘软流圈的新阶段硅酸盐熔体交代作用。B2–2组锂沸石仅记录后期的硅酸盐熔体交代作用。这两个阶段的交变作用可能是由古生代期间北NCC外围俯冲作用引起的地幔增生事件触发的。根据以上结果，我们认为南高崖地区的岩石圈地幔经历了与俯冲/碰撞过程有关的地壳—地幔循环或软流层—岩石圈相互作用，经历了多种变体，这在北NCC的地幔演化中起着重要作用。 。