Abstract The Novo Hamburgo Complex (NHC) occurs widespread in the 1 million km2, Early Cretaceous Parana volcanic province. Integrated field work with zircon dating and whole rock geochemistry supported the investigation. We used the sensitive high-resolution ion microprobe (SHRIMP II) to determine the U-Pb age of zircon from eight sandstones from pairs of parent Botucatu Formation (1.2 million km2, largest paleoerg in geological history) (n = 3) and injectites, extrudites (n = 5), total = 718 analyses. Samples were collected from south to northeast to northwest of the complex. Integrated age peaks (in Ma) occur at 151 (one grain), 236 (minor), 280–288 (significant), 528-536-544-626-628 (approximate 520–630; highest peak at 544), 1043–1057 (approximate 900–1300), 1734, 1968, 2046–2098, 2691, and 3300 (one grain). U-Pb age distribution barcode is similar for both parent sandstones and injectites, extrudites. No zircon from the Cretaceous Serra Geral Group of basalt and rhyodacite (134 ± 2 Ma) was dated in the sandstones. Differences between parent sandstones and injectites, extrudites originated by elutriation in 1–1700 m-high injection columns. Textural characteristics are bimodal, medium to fine grained in parent beds, and unimodal, fine grained in injectites, extrudites. Chemical differences are increase in Al, K, Na, Ca, Rb, Sr, Ba, ETR, Cu, U, Th in injectites, extrudites compared to parent beds. We conclude that the injected sandstone and contained zircon originated in the Botucatu Formation paleoerg ascending through the volcanic lavas in a sand (estimated 70 vol%) and water (30 vol%) slurry. This is a prime, unique example of paleoerg sand remobilization after aquifer heating and volcanic rock sealing in a huge injection complex.

中文翻译：

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巴拉那火山省边缘和沉积中心周围的砂泥注入和渗出物的演变

摘要 Novo Hamburgo Complex (NHC) 广泛分布于100 万平方公里的早白垩世巴拉那火山省。锆石测年和全岩地球化学的综合野外工作支持了调查。我们使用灵敏的高分辨率离子探针 (SHRIMP II) 确定了来自 Botucatu 组母体（120 万平方公里，地质历史上最大的古尔格）（n = 3）和注入岩对的八块砂岩中锆石的 U-Pb 年龄，挤出物 (n = 5)，总计 = 718 次分析。从综合体的南到东北到西北收集样品。综合年龄峰值（以 Ma 为单位）出现在 151（一粒）、236（次要）、280-288（显着）、528-536-544-626-628（大约 520-630；最高峰在 544）、1043- 1057（约 900-1300）、1734、1968、2046-2098、2691 和 3300（一粒）。U-Pb 年龄分布条码对于母砂岩和注入岩、挤压岩都是相似的。砂岩中没有来自白垩纪 Serra Geral 群玄武岩和流纹英岩 (134 ± 2 Ma) 的锆石进行年代测定。母砂岩和注入岩之间的差异，挤出岩起源于 1-1700 m 高注入柱中的淘析。结构特征是双峰，在母层中为中等至细粒，在注射体、挤压体中为单峰、细粒。与母床相比，注射体、挤出体中的 Al、K、Na、Ca、Rb、Sr、Ba、ETR、Cu、U、Th 的化学差异增加。我们得出结论，注入的砂岩和包含的锆石起源于 Botucatu 组古尔格，上升通过火山熔岩在砂（估计 70 vol%）和水（30 vol%）浆液中。这是一个素数，