Los depósitos clásticos pos-Laramide de la Sierra de Guanajuato: Implicaciones de su composición en la evolución tectono-sedimentaria y paleogeográfica

IF 0.8 4区地球科学 Q3 GEOLOGY

Estudios Geologicos-Madrid Pub Date : 2016-11-24 DOI:10.3989/EGEOL.42480.417

Raúl Miranda-Avilés, María Jesús Puy-Alquiza, Lourdes Omaña, Isidro Loza-Aguirre

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引用次数: 8

Abstract

This article presents the results of the study on sedimentation, sedimentary environments, tectono-sedimentary and paleogeographic evolution of post-Laramide clastic deposits and pre-volcanism of the Sierra Madre Occidental in the Sierra de Guanajuato, central Mexico. The Eocene Duarte Conglomerate and Guanajuato Conglomerate were deposited in the middle and distal parts of alluvial fans. The studied rocks are composed of limestone clasts, granite, andesite, metasediments, diorite, and pyroxenite, indicating the erosion of uplifted blocks of the basal complex of the Sierra de Guanajuato (Arperos basin). The petrographic and compositional analysis of limestone shows a textural variation from basin limestones and shallow platform limestones. The shallow platform limestone contain bivalves, brachiopods, gastropods, echinoderms and benthic foraminifera from the Berriasian-Valanginian. The shallow-water limestone corresponds to the boundary of the Arperos basin whose original outcrops currently not outcrop in the Sierra de Guanajuato.

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瓜纳华托山脉后laramide碎屑沉积:其组成对构造-沉积和古地理演化的影响

本文介绍了墨西哥中部瓜纳华托山脉西马德雷后拉拉米碎屑沉积和火山前活动的沉积、沉积环境、构造-沉积和古地理演化的研究成果。始新世的杜阿尔特砾岩和瓜纳华托砾岩沉积在冲积扇的中、远端。所研究的岩石由石灰岩碎屑、花岗岩、安山岩、变质沉积物、闪长岩和辉石岩组成，表明了瓜纳华托山脉(Arperos盆地)基底复合体隆起块体的侵蚀作用。石灰岩的岩石学和成分分析表明，其结构与盆地灰岩和浅台地灰岩不同。浅层台地石灰岩中有贝利亚-瓦兰吉尼期的双壳类、腕足类、腹足类、棘皮类和底栖有孔虫。浅水灰岩对应于Arperos盆地的边界，该盆地原来的露头现在在瓜纳华托山没有露头。

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来源期刊

Estudios Geologicos-Madrid GEOLOGY-

CiteScore

1.40

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： Since 1945 Estudios Geologicos publishes original research works, as well as reviews, about any topic on Earth Sciences. Estudios Geologicos is published as one yearly volume, divided into two half-yearly issues. It is edited by the Spanish National Research Council (Consejo Superior de Investigaciones Científicas, CSIC) at the Instituto de Geociencias (CSIC-UCM). Estudios Geologicos provides free access to full-text articles through this electronic edition. Accepted articles appear online as "Forthcoming articles" as soon as the galley proofs have been approved by the authors and the Editor-in-Chief. No changes can be made after online publication.