当前位置: X-MOL 学术Ore Geol. Rev. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
An appraisal of mineral systems associated with Precambrian Large Igneous Provinces of the Indian Shield
Ore Geology Reviews ( IF 3.3 ) Pub Date : 2021-01-23 , DOI: 10.1016/j.oregeorev.2021.104009
Amiya K. Samal , Rajesh K. Srivastava , Richard E. Ernst

We examined Precambrian Large Igneous Provinces (LIPs) of the Indian Shield for their economic potential. These include 3 proposed LIP events in the Archean and 12 LIP events during Proterozoic. Mafic-ultramafic units of LIPs are key targets for mineralization of Cu-Ni-Co-platinum group elements (PGEs), Fe-Ti-V and Cr; both as oxides and sulfides. Examples include Cr, PGE, V-Ti deposit hosted in the ultramafic rocks of the Paleoarchean Nuggihalli greenstone belt in the western Dharwar craton, which is linked to the ca. 3.35–3.34 Ga Sargur LIP. More broadly, geochemical data indicating significant crustal contamination suggest Cu-Ni, Co, PGE sulfide mineralization potential for the ca. 2.80–2.75 Ga Ghatgaon, ca. 2.37–2.36 Ga Bangalore, ca. 2.22 Ga Kandlamadugu, ca. 2.21–2.18 Ga Anantapur, and ca. 1.89–1.85 Ga Bastanar LIPs. The Malanjkhand Cu mineralization in the Bastar craton can be explained by hydrothermal alteration of mafic dykes of the ca. 1.89–1.85 Ga Bastanar LIP generating immiscible sulfide melts, which, in turn, are deposited in adjacent granitic rocks; however, its association with the ca. 2.50–2.47 Ga Dantewara LIP cannot be ruled out. The Taramatipet and Pirancheru molybdenite occurrences in the eastern Dharwar craton can be explained by the mixing of a sialic magma with injections of a deep-seated basic melt associated with the emplacement of mafic dykes linked to the ca. 2.26–2.25 Ga Ippaguda LIP. Diamondiferous kimberlites in the Dharwar, Bastar and Vindhyan (surrounding the Bundelkhand craton) regions are coeval and linked to the ca. 1.11 (−1.05) Ga Mahoba LIP. REE, U-Th, Nb-Ta, P, and Cu mineralization associated with the ca. 0.80–0.75 Ga alkaline-carbonatite complexes from the southern Indian Shield is linked to the ca. 0.77–0.75 Ga Malani Igneous Suite (Silicic LIP) from the Aravalli craton.



中文翻译:

与印度盾前寒武纪大火成岩省有关的矿物系统的评估

我们研究了印度盾构的前寒武纪大火成岩省(LIP)的经济潜力。其中包括3个在太古宙建议的LIP事件和元古代的12个LIP事件。LIP的镁铁质超音波单位是Cu-Ni-Co-铂族元素(PGEs),Fe-Ti-V和Cr矿化的主要目标。无论是氧化物还是硫化物。例子包括Cr,PGE,V-Ti矿床,这些矿床位于Dharwar克拉通西部的古古宙Nuggihalli绿岩带的超镁铁质岩中,该岩体与ca相连。3.35–3.34 Ga Sargur LIP。从更广泛的角度来看,地球化学数据表明存在严重的地壳污染,表明该地区的铜镍,钴,PGE硫化物矿化潜力。约2.80–2.75 Ga Ghatgaon,约2.37–2.36加班加罗尔 2.22 Ga Kandlamadugu,ca。2.21–2.18加纳塔纳布尔(Ga Anantapur),以及 1.89–1.85 Ga Ga Bastanar LIP。Bastar克拉通中的Malanjkhand Cu矿化可以用ca的铁镁质岩脉的热液改变来解释。1.89–1.85 Ga Bastanar LIP生成不混溶的硫化物熔体,然后将其沉积在相邻的花岗岩岩石中;但是,它与ca的关联。2.50–2.47 Ga Dantewara LIP不能排除。达拉克克拉通东部的塔拉玛蒂皮特岩和皮兰切鲁辉钼矿的发生可以通过将唾液岩浆与深部基本熔液的注入相混合来解释,这些熔液与大约与加利福尼亚州有关的黑手性堤坝的位置有关。2.26–2.25 Ga Ippaguda LIP。Dharwar,Bastar和Vindhyan(环绕Bundelkhand克拉通)地区的菱形金伯利岩是同时代的,并与ca相连。1.11(−1.05)Ga Mahoba LIP。稀土元素,U-Th,Nb-Ta,P和Cu的矿化作用与ca. 0.80-0。来自印度盾南部的75 Ga碱-碳酸盐复合物与该岩层相连。来自Aravalli克拉通的0.77–0.75 Ga马拉尼火成岩套装(Silicic LIP)。

更新日期:2021-02-16
down
wechat
bug