Abstract The growth of southern Laurentia has been attributed to the accretion of juvenile arc terranes during the successive 1.74–1.68 Ga Yavapai and 1.65–1.60 Ga Mazatzal orogenies. However, in light of the increasing importance of the ca. 1.49–1.40 Ga Mesoproterozoic Picuris orogeny, the tectonic setting in which the Mazatzal crustal province and its distinctive quartzite-rhyolite successions were generated needs additional examination. The Sandia-Manzano-Los Pinos uplift in central New Mexico is an ideal place to characterize the tectonic history of the Mazatzal crustal province. A comprehensive geochronologic and Hf-isotopic dataset for Proterozoic rocks of the Sandia-Manzano-Los Pinos uplift is presented. Plutonic and metavolcanic rocks in the Sandia-Manzano-Los Pinos uplift were emplaced in three pulses at 1668–1655 Ma, 1587 Ma, and 1459–1453 Ma. Hf-isotope data from the Paleoproterozoic plutonic rocks are juvenile, with both leucogranite and arc-related granodiorite yielding eHf(t) values ranging from +6 to +12, compared to the coeval depleted mantle value of +10 at ca. 1.65 Ga. Inherited zircon in Paleoproterozoic rocks suggest that crust older than 1.7 Ga was involved in their genesis. Hf-isotope data from Mesoproterozoic plutonic rocks in the Sandia-Manzano-Los Pinos uplift are consistent with derivation from 1.7 to 1.6 Ga lithosphere. Detrital zircon indicate that metasedimentary rocks of the lower Manzano group were derived primarily from local sources that have U-Pb-Hf isotope compositions similar to the plutonic rocks which intrude and volcanic rocks that underlie the Manzano group. The detrital zircon provenance of the Manzano group broadens up-section from unimodal populations with age peaks at ca. 1.65 Ga to include 1.7–3.0 Ga detrital zircon derived from older Laurentian sources like the Yavapai and Mojave provinces. We offer a new model for the formation of the Mazatzal crustal province of New Mexico as a continental margin arc built on top of the previously assembled Yavapai province. The Manzano group quartzite-rhyolite succession was formed by lithospheric extension above a north-dipping, southward retreating subduction zone. The Manzano group was then subjected to ca. 1.65 Ga syn-magmatic tectonism and later intracratonic contractional tectonism, likely during the 1.46–1.40 Ga Picuris orogeny.

中文翻译：

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美国新墨西哥州中部元古代岩石的年代学和 Hf 同位素框架：马扎扎尔地壳省在扩展大陆边缘弧中的形成

摘要 Laurentia 南部的生长归因于连续 1.74-1.68 Ga Yavapai 和 1.65-1.60 Ga Mazatzal 造山运动期间幼年弧形地体的增生。但是，鉴于 ca 的重要性日益增加。1.49-1.40 Ga 中元古代 Picuris 造山运动、马扎扎尔地壳省及其独特的石英岩-流纹岩系列产生的构造环境需要进一步研究。新墨西哥州中部的桑迪亚-曼扎诺-洛斯皮诺斯隆起是描述马扎扎尔地壳省构造历史特征的理想场所。提供了桑迪亚-曼扎诺-洛斯皮诺斯隆起的元古代岩石的综合地质年代学和 Hf 同位素数据集。Sandia-Manzano-Los Pinos 隆起中的深成岩和变质火山岩在 1668-1655 Ma、1587 Ma、和 1459–1453 Ma。来自古元古代深成岩的 Hf 同位素数据还很年轻，与约 10 时的 +10 的同期枯竭地幔值相比，无色花岗岩和与弧相关的花岗闪长岩的 eHf(t) 值范围为 +6 至 +12。1.65 Ga。古元古代岩石中的继承锆石表明，早于1.7 Ga 的地壳参与了它们的成因。Sandia-Manzano-Los Pinos 隆起中元古代深成岩的 Hf 同位素数据与 1.7 至 1.6 Ga 岩石圈的推导一致。碎屑锆石表明，下 Manzano 群的变沉积岩主要来自当地资源，其 U-Pb-Hf 同位素组成类似于侵入 Manzano 群的深成岩和位于 Manzano 群之下的火山岩。Manzano 组的碎屑锆石来源扩大了单峰群体的上剖面，年龄峰值约为 1.65 Ga 包括 1.7-3.0 Ga 碎屑锆石，这些碎屑锆石来自较早的 Laurentian 资源，如 Yavapai 和 Mojave 省。我们为新墨西哥州马扎扎尔地壳省的形成提供了一种新模型，即建立在先前组装的亚瓦派省之上的大陆边缘弧。Manzano 群石英岩-流纹岩系列是由北倾南撤俯冲带上方的岩石圈伸展形成的。Manzano 小组然后遭受了大约。1.65 Ga 同岩浆构造作用和后来的克拉通内收缩构造作用，可能发生在 1.46-1.40 Ga Picuris 造山运动期间。0 Ga 碎屑锆石来自更古老的劳伦产地，如 Yavapai 和 Mojave 省。我们为新墨西哥州马扎扎尔地壳省的形成提供了一种新模型，即建立在先前组装的亚瓦派省之上的大陆边缘弧。Manzano 群石英岩-流纹岩系列是由北倾南撤俯冲带上方的岩石圈伸展形成的。Manzano 小组然后遭受了大约。1.65 Ga 同岩浆构造作用和后来的克拉通内收缩构造作用，可能发生在 1.46-1.40 Ga Picuris 造山运动期间。0 Ga 碎屑锆石来自更古老的劳伦产地，如 Yavapai 和 Mojave 省。我们为新墨西哥州马扎扎尔地壳省的形成提供了一种新模型，即建立在先前组装的亚瓦派省之上的大陆边缘弧。Manzano 群石英岩-流纹岩系列是由北倾南撤俯冲带上方的岩石圈伸展形成的。Manzano 小组然后遭受了大约。1.65 Ga 同岩浆构造作用和后来的克拉通内收缩构造作用，可能发生在 1.46-1.40 Ga Picuris 造山运动期间。Manzano 群石英岩-流纹岩系列是由北倾南撤俯冲带上方的岩石圈伸展形成的。Manzano 小组然后遭受了大约。1.65 Ga 同岩浆构造作用和后来的克拉通内收缩构造作用，可能发生在 1.46-1.40 Ga Picuris 造山运动期间。Manzano 群石英岩-流纹岩系列是由北倾南撤俯冲带上方的岩石圈伸展形成的。Manzano 小组然后遭受了大约。1.65 Ga 同岩浆构造作用和后来的克拉通内收缩构造作用，可能发生在 1.46-1.40 Ga Picuris 造山运动期间。