Abstract The petrogenesis and inner genetic relations of Mesoarchean granitoid rocks have been poorly researched in the Anshan-Benxi (AB) area of the North China Craton. These Mesoarchean granitoids are mainly composed of ~3.14 Ga Lishan trondhjemitic gneisses (LSTG), and 2.95–3.01 Ga Donganshan – Jinjialing trondhjemitic to monzogranitic gneisses (DTMG) and Tiejiashan – Gongchangling high-K granitoid gneisses (TGKG), which show essentially consistent ages of magmatic crystallization. The LSTG are characterized by SiO2 (70.71–73.72 wt%) and Al2O3 (14.25–15.99 wt%) contents, and low MgO (0.46–1.12 wt%) contents with low Mg# values (32–49) and K2O/Na2O values of 0.43 to 0.66, and total rare earth elements (TREE) of 97 to 151 ppm with (La/Yb)N ratios of 14.19 to 83.15. Integrated with Hf–O isotope characteristics from previous research and partial melting simulation, the geochemical characteristics of LSTG indicate that the trondhjemitic magma was generated by the partial melting of the source consisting of dominant ~3.3 Ga juvenile crustal material and some Paleo- to Eoarchean sediments at the lower crust level. In contrast with the LSTG, the DTMG shows higher SiO2 (73.10–75.99 wt%) contents, slightly lower Al2O3 (13.41–15.00 wt%) and MgO (0.21–0.61 wt%) contents with Mg# values (18–48), higher K2O/Na2O values (0.53–1.26) and similar TREE contents of 85 to 162 ppm, (La/Yb)N ratios (30.78–125.02), and eHf(t2) values from −5.38 to 3.16. Detailed petrogenetic investigations suggest that the magma of the DTMG was derived from the partial melting of the source comprising main ~3.3 Ga basaltic material and more Mesoarchean sediments at the lower crust level, then experienced slight plagioclase fractionation crystallization. The TGKG is characterized by the highest SiO2 (72.86–77.57 wt%) concentrations, but the lowest Al2O3 (11.96–14.47 wt%) and MgO (0.01–0.54 wt%) contents with K2O/Na2O values of 0.86 to 2.53 and Mg# values of 2 to 41. The wide TREE contents (142–766 ppm) and (La/Yb)N ratios (6.41–86.87), eHf(t2) value range of −9.71 to −2.14, suggesting that the magma of TGKG formed from the partial melting of abundant Eo- and Paleoarchean recycled sediments and igneous rocks. This petrogenesis of TGKG magma indicates that Eo- to Paleoarchean supracrustal material may exist under the Tiejiashan – Gongchangling area. Integrating previous studies on the AB area, these diverse granitoids record two episodes of major crust growths at ~3.65–3.8 Ga and ~3.3 Ga. Subsequently, the geological processes were dominated by the recycling of ~3.3 Ga basaltic material and Eo- to Paleoarchean crustal materials during ~3.14–2.95 Ga. The petrogenesis of Mesoarchean diverse granitoids indicates that voluminous supracrustal materials with different ages were transferred into the lower crust level during 2.95–3.14 Ga, revealing that pre-subduction buckling convergence may be the most probable Mesoarchean geodynamic regime in the AB area of the North China Craton.

中文翻译：

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华北克拉通鞍山-本溪地区多种花岗岩类的中太古代地球动力学机制

摘要 华北克拉通鞍山-本溪(AB)地区中太古代花岗岩的成因及其内部成因关系研究甚少。这些中太古宙花岗岩主要由~3.14嘎里山长麻岩片麻岩（LSTG）和2.95~3.01嘎东安山-金家岭长麻岩至二长花岗岩片麻岩（DTMG）和铁家山-贡昌岭KG高K（TG）片麻岩组成，其年龄基本一致岩浆结晶作用。LSTG 的特点是 SiO2 (70.71–73.72 wt%) 和 Al2O3 (14.25–15.99 wt%) 含量，以及低 MgO (0.46–1.12 wt%) 含量和低 Mg# 值 (32–49) 和 K2O/Na2O 值0.43 至 0.66，总稀土元素 (TREE) 为 97 至 151 ppm，(La/Yb)N 比率为 14.19 至 83.15。结合前人研究和部分熔融模拟的 Hf-O 同位素特征，LSTG 地球化学特征表明，长斜纹岩浆是由占优势的~3.3 Ga 新生地壳物质和一些古至始太古代沉积物组成的源部分熔融产生的在地壳下层。与 LSTG 相比，DTMG 的 SiO2 (73.10–75.99 wt%) 含量较高，Al2O3 (13.41–15.00 wt%) 和 MgO (0.21–0.61 wt%) 含量略低，Mg# 值为 (18–48)，更高的 K2O/Na2O 值 (0.53–1.26) 和类似的 TREE 含量为 85 到 162 ppm，(La/Yb)N 比 (30.78–125.02) 和 eHf(t2) 值从 -5.38 到 3.16。详细的岩石成因研究表明，DTMG 的岩浆来源于包含主~3 的源的部分熔融。3 Ga 玄武质物质和更多的中太古代沉积物在下地壳水平，然后经历了轻微的斜长石分馏结晶。TGKG 的特点是 SiO2 (72.86–77.57 wt%) 浓度最高，但 Al2O3 (11.96–14.47 wt%) 和 MgO (0.01–0.54 wt%) 含量最低，K2O/Na2O 值为 0.86 到 2.53 和 Mg#值 2 至 41。 宽 TREE 含量 (142–766 ppm) 和 (La/Yb)N 比值 (6.41–86.87)，eHf(t2) 值范围为 -9.71 至 -2.14，表明 TGKG 的岩浆形成来自丰富的原始和古太古代循环沉积物和火成岩的部分熔化。TGKG岩浆的这一成岩作用表明，铁家山—弓长岭地区可能存在始古至古太古代上壳物质。结合以往对AB区的研究，