The Simlipal Complex is a circular/elliptical structure at the eastern margin of the Singhbhum Craton in eastern India. The complex comprises metavolcanic and metasedimentary rocks and may represent the remnant of an Archean impact structure. Major and trace element abundances and zircon U–Pb ages from the metasedimentary rocks of the complex, which possibly constituted the target rocks of the impact, are used to constrain the provenance of the sediments and the tectonic environment of their deposition. The metasedimentary rocks include sandstones/quartzites and shales/slates/phyllites. CIA index and the A-CN-K discrimination diagram suggests moderate to extensive weathering of the source areas. The shales/slates/phyllites plot along the weathering trend of granite-granodiorite-tonalite, implying an average granodioritic source. The rare earth element (REE) patterns of shales/slates/phyllites are fractionated (La_N/Yb_N = 2.86–13.5) with nearly flat heavy-REE (Gd_N/Yb_N = 0.92–1.84) similar to Post Archean Australian shale. The Zr/Sc and Th/Sc ratios indicate zircon addition to sandstones/quartzites and mixing of mafic and felsic igneous rocks to shales/slates/phyllites. The shales/slates/phyllites are enriched in Sc, Cr, Ni, Y, Zr, Hf, Th, and U compared to Archean Upper Crust and have positive Cr and Ni anomalies suggesting contribution from mafic/ultramafic source. The major age peaks retrieved from detrital zircons in the metasediments are at 3.63 Ga, 3.46–3.26, 3.17–2.95, 2.87–2.75 Ga, and 2.54 Ga which correlate with ages reported for granitoid suites from different lithodemic units of the Singhbhum Craton. The sediments from the central and NW regions of the complex are dominated by zircons with an age of 3028 ± 15 Ma, while those from the NE regions and areas outside of it (e.g., the Kuliana region) have a preponderance of older zircon ages (ca. 3.25–3.38 Ga). The ages of the oldest metamorphic and the youngest detrital zircon population are suggestive of deposition of the sediments between ca. 2.8 Ga and 2.5 Ga. Crystallization ages and the shape of zircon crystals along with the geochemical signature of the sediments suggest that they were derived locally from the Singhbhum Craton and its surroundings.

Simlipal复合体是印度东部Singhbhum Craton东边缘的圆形/椭圆形结构。该复合体包括超火山和准沉积岩，可能代表了太古宙撞击构造的残余。复杂的沉积物中的主要和微量元素的丰度以及锆石的U–Pb年龄（可能构成了冲击的目标岩石）被用来限制沉积物的来源及其沉积的构造环境。准沉积岩包括砂岩/石英岩和页岩/板岩/层石。CIA指数和A-CN-K判别图表明源区的中度到中度风化。页岩/板岩/页岩沿着花岗岩-红闪长岩-tonalite的风化趋势绘图，这意味着平均的花岗闪长岩源。_N / Yb _N  = 2.86–13.5），重稀土元素含量接近平坦（Gd _N / Yb _N = 0.92-1.84），类似于澳大利亚太古宙时代的页岩。Zr / Sc和Th / Sc之比表示锆石添加到砂岩/石英岩中，镁铁质和长英质火成岩混合成页岩/板岩/千枚岩。与太古代上地壳相比，页岩/板岩/页岩富含Sc，Cr，Ni，Y，Zr，Hf，Th和U，并且Cr和Ni异常为正，表明来自镁铁质/超音波来源。从沉积物碎屑锆石中检索到的主要年龄峰值分别为3.63 Ga，3.46-3.26、3.17-2.95、2.87-2.75 Ga和2.54 Ga，这与来自Singhbhum Craton不同岩性单元的花岗岩组的年龄有关。复杂的中部和西北部地区的沉积物以年龄为3028±15 Ma的锆石为主，而东北部地区和外围地区的沉积物为锆石。（Kuliana地区）的锆石年龄较大（约3.25–3.38 Ga）。最古老的变质锆石和最年轻的碎屑锆石的年龄暗示了大约在大约两年之间的沉积物沉积。2.8 Ga和2.5 Ga。结晶年龄和锆石晶体的形状以及沉积物的地球化学特征表明，它们是局部存在于Singhbhum Craton及其周围地区的。