The metavolcanic suites from southern Bundelkhand Craton, India provides a comprehensive record of the little-explored evolutionary history of Southern Bundelkhand Craton. The present work is a detailed petrological and geochemical account of the metavolcanics to (i) constrain the mantle processes and tectonic realm involved in its genesis and (ii) evaluate the Archean geodynamics of Bundelkhand Craton. The metavolcanics of Kurrat, Badwar and Girar are compositionally slightly evolved tholeiitic basalts. Chondrite normalized REE distribution pattern reflects a slightly super-chondritic LREE distribution pattern (Kurrat metavolcanics, KMV: (La/Yb)_N = 1.9–2.9, Badwar-Girar metavolcanics, BGMV: (La/Yb)_N = 0.89–2.86) and negative Nb and Ti anomaly on a primitive mantle normalized trace element variation diagram. ƐNd(t) of the samples vary from −1.0 to 6.3 and ƐNd(t) versus ⁸⁷Sr/⁸⁶Sr diagram imply the absence of crustal contamination. These attributes are consistent with the formation of the metavolcanics from a slightly enriched heterogeneous mantle source at shallower depths where the original depleted MORB underwent later episode(s) of enrichment via fluid addition. The metavolcanics originated in an intra-oceanic subduction setting, essentially exhibiting back-arc basin basalts (BABB) characteristics. T_DM age (3.07 Ga) calculated for the KMV is coherent with the 2.98 Ga age of the BGMV from the adjacent Badwar-Girar volcano-sedimentary sequence. Collectively, all the features implicate the formation of metavolcanics in a modern style Mesoarchean extension-subduction geodynamic regime.

来自印度本德尔坎德克拉通南部的变质火山岩套提供了对南本德尔坎德克拉通鲜为人知的演化历史的全面记录。目前的工作是对变质火山的详细岩石学和地球化学描述，以 (i) 限制参与其成因的地幔过程和构造领域，以及 (ii) 评估邦德尔坎德克拉通的太古代地球动力学。Kurrat、Badwar 和 Girar 的变质火山是成分略微演化的拉斑玄武岩。球粒陨石归一化 REE 分布模式反映了略微超球粒状轻稀土分布模式（Kurrat 变质火山，KMV：（La/Yb）_N  = 1.9–2.9，Badwar-Girar 变质火山，BGMV：（La/Yb）_N = 0.89–2.86) 和原始地幔归一化微量元素变化图上的负 Nb 和 Ti 异常。样本的 ƐNd(t) 从 -1.0 到 6.3 不等，而 ƐNd(t) 与⁸⁷ Sr/ ⁸⁶ Sr 图表示不存在地壳污染。这些属性与较浅深度的轻度富集异质地幔源的变质火山形成一致，其中原始耗尽的 MORB 通过流体添加经历了后期的富集。变质火山起源于大洋内俯冲环境，基本上表现出弧后盆地玄武岩（BABB）特征。Ť _DM为 KMV 计算的年龄 (3.07 Ga) 与来自相邻 Badwar-Girar 火山沉积序列的 BGMV 的 2.98 Ga 年龄相一致。总的来说，所有这些特征都暗示了变质火山在现代风格的中太古代伸展-俯冲地球动力学体系中的形成。