Petrography and geochemistry of the Mesozoic sedimentary rocks of the Kutch Basin in western India reveal the predominance of felsic source rocks. Single‐grain chemistry of the detrital heavy minerals in these sediments refines the existing provenance interpretations by incorporating additional data related to source lithology. The study presents information on type, composition, and metamorphic grade of the source rocks for the Mesozoics of the Kutch Basin, which comprises Jhurio, Jhumara, Jhuran, and Bhuj formations. Chemistry of rutile, garnet, and tourmaline supports multiple sources of sediments. The ratio between Cr and Nb in rutile suggests the dominance of sediment input from metapelites. The relationship between (Fe + Mn)–Mg–Ca in garnets and Ca–Fe_total–Mg in tourmalines indicates the dominance of Ca‐poor felsic metamorphic source along with intermediate‐acidic plutonic rocks. The multivariate discrimination of the detrital garnets reveals the dominance of granulite and amphibolite facies source rocks. Rutile compositions indicate subordinate inputs from mafic sources across the investigated sedimentary succession. The single‐grain analysis of heavy minerals, therefore, infers a wide variation in source rock types.

中文翻译：

---

重矿物化学在物源重建中的应用：以印度库奇盆地中生代砂岩为例

印度西部库奇盆地中生代沉积岩的岩石学和地球化学揭示了长英质烃源岩的优势。这些沉积物中碎屑重矿物的单粒化学通过结合与源岩性有关的其他数据，完善了现有的物源解释。这项研究提供了有关库奇盆地中生代的烃源岩类型，组成和变质等级的信息，其中包括约里奥，约哈马拉，约兰和布杰地层。金红石，石榴石和电气石的化学物质支持多种沉积物来源。金红石中Cr和Nb的比例表明，由变质岩输入的沉积物占主导地位。石榴石中（Fe + Mn）–Mg–Ca与_总Ca–Fe的关系–电气石中的镁表明Ca贫乏的长英质变质源以及中酸性的深部岩溶岩。碎屑石榴石的多变量判别显示了花岗石和闪石岩相烃源岩的优势。金红石组成表明在研究的沉积演替过程中来自镁铁质来源的次要输入。因此，对重矿物的单颗粒分析可以推断出烃源岩类型的广泛差异。