The Pleistocene tectono-stratigraphic evolution of the northern Po Plain (Italy) around the Castenedolo and Ciliverghe hillocks

IF 1.7 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary Research Pub Date : 2023-11-03 DOI:10.1017/qua.2023.47

Fulvia S. Aghib, Giovanni Muttoni, Gianluca Norini, Guido S. Mariani, Andrea Zerboni, Roberto de Franco, Andrea Di Capua, Marco A. Tira, Alessio Brusamolino, Simona Menici, Grazia Caielli, Gianluca Groppelli, Andrea Piccin

{"title":"The Pleistocene tectono-stratigraphic evolution of the northern Po Plain (Italy) around the Castenedolo and Ciliverghe hillocks","authors":"Fulvia S. Aghib, Giovanni Muttoni, Gianluca Norini, Guido S. Mariani, Andrea Zerboni, Roberto de Franco, Andrea Di Capua, Marco A. Tira, Alessio Brusamolino, Simona Menici, Grazia Caielli, Gianluca Groppelli, Andrea Piccin","doi":"10.1017/qua.2023.47","DOIUrl":null,"url":null,"abstract":"Abstract We studied the Pleistocene subsurface stratigraphy of an area in the northern Po Plain around the isolated tectonic hillocks of Castenedolo and Ciliverghe (Brescia, Italy) in order to estimate their long-term rates of tectonic deformation. Integrated stratigraphy of a new 100-m-long core (RL13) allowed better definition of the regional Y (0.45 Ma) and R (0.87 Ma) surfaces and the related magnetostratigraphically calibrated PS1, PS2, and PS3 depositional sequences. The Y surface in the RL13 core was placed at the base of the PS3 proximal braided river system that was deposited during middle Pleistocene within the Brunhes chron. The R surface is considered to be eroded within the PS2 braid-plain deposits at ca. 0.87 Ma between the top of Jaramillo subchron and the Bruhnes chron during the late Early Pleistocene. Based on different datasets, we evaluated the sedimentation rate, which has decreased from 0.09 mm/yr with deposition of PS2, to 0.06 mm/yr with deposition of PS3. The tectonic uplift, with an average rate of ~0.1 mm/yr in the last ca. 0.87 Ma, is interpreted to be associated with a fault and related fault-propagation folding. The Castenedolo and Ciliverghe hillocks then formed due to tectonic uplift during a change in the sedimentation regime since 0.45 Ma.","PeriodicalId":49643,"journal":{"name":"Quaternary Research","volume":"9 7","pages":"0"},"PeriodicalIF":1.7000,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Quaternary Research","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1017/qua.2023.47","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"GEOGRAPHY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Abstract We studied the Pleistocene subsurface stratigraphy of an area in the northern Po Plain around the isolated tectonic hillocks of Castenedolo and Ciliverghe (Brescia, Italy) in order to estimate their long-term rates of tectonic deformation. Integrated stratigraphy of a new 100-m-long core (RL13) allowed better definition of the regional Y (0.45 Ma) and R (0.87 Ma) surfaces and the related magnetostratigraphically calibrated PS1, PS2, and PS3 depositional sequences. The Y surface in the RL13 core was placed at the base of the PS3 proximal braided river system that was deposited during middle Pleistocene within the Brunhes chron. The R surface is considered to be eroded within the PS2 braid-plain deposits at ca. 0.87 Ma between the top of Jaramillo subchron and the Bruhnes chron during the late Early Pleistocene. Based on different datasets, we evaluated the sedimentation rate, which has decreased from 0.09 mm/yr with deposition of PS2, to 0.06 mm/yr with deposition of PS3. The tectonic uplift, with an average rate of ~0.1 mm/yr in the last ca. 0.87 Ma, is interpreted to be associated with a fault and related fault-propagation folding. The Castenedolo and Ciliverghe hillocks then formed due to tectonic uplift during a change in the sedimentation regime since 0.45 Ma.

查看原文本刊更多论文

意大利波河平原北部Castenedolo和Ciliverghe山丘周围的更新世构造地层演化

摘要研究了波河平原北部Castenedolo和Ciliverghe(布雷西亚，意大利)孤立构造丘周围地区的更新世地下地层学，以估计它们的长期构造变形速率。新的100 m长岩心(RL13)的综合地层层序可以更好地定义区域Y (0.45 Ma)和R (0.87 Ma)面以及相关的磁地层校准PS1、PS2和PS3沉积层序。RL13岩心的Y形面位于中更新世布吕士时期沉积的PS3近端辫状河体系底部。R面被认为在早更新世晚期Jaramillo亚时顶与Bruhnes时之间约0.87 Ma的PS2辫状平原沉积中受到侵蚀。根据不同的数据，我们评估了沉积速率，从PS2沉积时的0.09 mm/yr下降到PS3沉积时的0.06 mm/yr。最后约0.87 Ma的平均抬升速率约为~0.1 mm/yr，被解释为与断层及其相关的断层传播褶皱有关。casenedolo和Ciliverghe丘陵是在0.45 Ma以来的沉积制度变化中由于构造隆升而形成的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Quaternary Research 地学-地球科学综合

CiteScore

4.70

自引率

8.70%

发文量

审稿时长

3 months

期刊介绍： Quaternary Research is an international journal devoted to the advancement of the interdisciplinary understanding of the Quaternary Period. We aim to publish articles of broad interest with relevance to more than one discipline, and that constitute a significant new contribution to Quaternary science. The journal’s scope is global, building on its nearly 50-year history in advancing the understanding of earth and human history through interdisciplinary study of the last 2.6 million years.