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Abstract
Giant quartz veins are widespread on the Bundelkhand Craton of the Indian Shield which precise ages with a SHRIMP-II, U-Th-Pb isotope are quantified in this article. Their relative geological age is well-documented: they cut the Paleoproterozoic (2150–1800 Ma) sediments of the Bijawar Group and are overlain by Proterozoic (1670–1030 Ma) sediments at the base of the Upper Vindhyan Supergroup. U-Th-Pb dating of zircon grains from a quartz vein was carried out to assess major event of their formation as 1866 ± 12 Ma. This data is consistent with the relative geological age of the veins. In addition, the quartz veins were shown to contain 2.86, 2.7, and 2.54 Ga xenocrystic zircon grains. Rocks with these ages are abundant in the craton. The formation of a giant quartz vein swarm is associated with the deformation of the Bundelkhand Craton lithosphere during 1.9–1.8 Ga ago triggered by compression caused by collision processes at the western flank of the Columbia Supercontinent on one side and plume activity on the other.
Highlights
Quartz veins are widespread around the world
Twenty relatively small (50–200 μm) zircon grains were extracted from the reddishmilky quartz sample taken in the Babina area (Figure 3)
Based on 207Pb/206Pb age, zircon grains (Zrn4) of varying age were identified from 1874 ± 60 to 1670 ± 59 Ma (Table 1; Figure 6a)
Summary
Quartz veins are widespread around the world They are essential indicators of the stressed state and hydrothermal activity of the earth’s crust during their formation [1]. The biggest veins have largely shaped the region’s landscape. They are up to 200 m in thickness and can be traced over tens of kilometers (Figure 2a,b). The petrography, petrogeochemistry, and metallogeny of the veins have been studied in detail [2,4,5]. Their geological relationship with surrounding complexes (granitoids, greenstones, dikes, and sediments) and the timing of their formation remains the subject of discussion
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