Abstract The Dharwar Craton developed progressively over a billion years, through two main stages of crustal growth separated by a few-hundred million year long period of relative quiescence. The first stage between 3.4 and 3.0 Ga developed a proto-craton, which was considerably amplified during the second main stage between 2.7 and 2.4 Ga, through extensive magmatism, tectonism, and crustal consolidation. This paper reports U–Pb dating results obtained in four specific areas of the craton, with the data encompassing key moments in this long development. Rocks formed during the proto-craton stage include a 3089 Ma augen gneiss and a 2973 Ma evolved granite, the latter of which marks the final cratonization event of the proto-craton. The beginning of the second main stage is recorded in this study by 2650 Ma tonalite and trondhjemite, a 2623 Ma granite dyke cutting augen gneiss, and 2614, 2602 and 2588 Ma volcanic rocks. Titanite responded differently to the long evolution, as a function of location and type of overprint. It preserved an original 2973 Ma magmatic age in the west, but was reset and/or crystallized during secondary events in central domains of the craton, yielding ages between 2590 and 2360 Ma. A diorite stock intruded at 2207 Ma in the consolidated crust. It is correlated with the Anantapur-Kunigal mafic dyke swarm, one of a series of such events in the Dharwar Craton between 2.35 and 1.79 Ma. In terms of its overall evolution the Dharwar Craton has an affinity with the Slave clan, which includes the Wyoming and Zimbabwe cratons. It also matches many features in the evolution of the Sao Francisco Craton, a probable other member of Sclavia. This is in contrast to the Amazonian Craton, which has more affinity with the Superior clan.

中文翻译：

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西达尔瓦克拉通的 U-Pb 系统学 - 地壳演化十亿年历史及其与古代超级克拉通关系的一瞥

摘要 Dharwar Craton 逐渐发展超过 10 亿年，经历了两个主要的地壳生长阶段，中间有数亿年的相对静止期。3.4 至 3.0 Ga 之间的第一阶段形成了一个原克拉通，在 2.7 至 2.4 Ga 之间的第二个主要阶段，通过广泛的岩浆作用、构造作用和地壳固结作用，原克拉通被显着放大。本文报告了在克拉通四个特定区域获得的 U-Pb 测年结果，数据涵盖了这一长期发展的关键时刻。原克拉通阶段形成的岩石包括一块 3089 Ma 的 augen 片麻岩和一块 2973 Ma 演化的花岗岩，后者标志着原克拉通最后的克拉通化事件。本研究记录了第二个主要阶段的开始，由 2650 Ma 的闪长岩和长闪长岩组成，a 2623 Ma 花岗岩岩脉切割片麻岩，以及 2614、2602 和 2588 Ma 火山岩。Titanite 对长期演变的反应因位置和套印类型而异。它在西部保留了原始的 2973 Ma 岩浆年龄，但在克拉通中央区域的次生事件中被重置和/或结晶，产生了 2590 至 2360 Ma 的年龄。2207 Ma 闪长岩侵入固结地壳。它与 Anantapur-Kunigal 基性岩脉群有关，后者是 2.35 至 1.79 Ma 之间 Dharwar Craton 中的一系列此类事件之一。就其整体演化而言，达尔瓦尔克拉通与奴隶氏族有着密切的关系，其中包括怀俄明和津巴布韦克拉通。它还与圣弗朗西斯科克拉通演化中的许多特征相匹配，圣弗朗西斯科克拉通可能是斯克拉维亚的其他成员。