Climato-tectonic evolution of siliciclastic sandstones on Puerto Rico: from lithic arenites to quartz-arenitic sands in an oceanic island-arc setting

IF 2 4区 地球科学 Q1 GEOLOGY Journal of Sedimentary Research Pub Date : 2023-07-18 DOI:10.2110/jsr.2023.016
D. Larue, Kimberly Mendez Mendez, José L. Corchado Albelo, Lauryn N. Martinez, S. Hughes, T. Hudgins, H. Santos, Alan L. Smith, C. Osterberg
{"title":"Climato-tectonic evolution of siliciclastic sandstones on Puerto Rico: from lithic arenites to quartz-arenitic sands in an oceanic island-arc setting","authors":"D. Larue, Kimberly Mendez Mendez, José L. Corchado Albelo, Lauryn N. Martinez, S. Hughes, T. Hudgins, H. Santos, Alan L. Smith, C. Osterberg","doi":"10.2110/jsr.2023.016","DOIUrl":null,"url":null,"abstract":"Siliciclastic sandstone composition on the island of Puerto Rico, part of the Greater Antilles, was influenced by both tectonic setting and climate. Cretaceous through Eocene volcanic and plutonic rocks on Puerto Rico formed in an oceanic-arc setting. Sandstones deposited during arc volcanism are quartz-poor lithic and feldspatholithic arenites, whose geochemistry largely matches that of the oceanic-arc volcanic and plutonic rocks on Puerto Rico. After cessation of volcanism on Puerto Rico during collision of the Greater Antilles Island arc with the Bahamas Bank, an Oligocene through Holocene overlap assemblage was deposited unconformably above the arc deposits in the North Coast and South Coast basins of Puerto Rico. The overlap assemblage consists of some siliciclastic material, but largely shallow-water carbonate deposits. Siliciclastic deposition in the overlap assemblage reflects the volcanic-arc source, plus quartz derived from plutons exposed during uplift. In the Pleistocene and Holocene (and possibly earlier), poorly consolidated quartz-arenitic sands with SiOR2R values from 92 to 98% were deposited in the overlap assemblage. On geochemical tectonic-affinity diagrams, the lithic sandstones plot, as expected, in or near the fields for oceanic-arc provenance. However, the quartz-arenitic sands plot incorrectly in the passive-margin field when considering major elements, and correctly in or near the oceanic-arc field when considering trace elements. Trace elements in the quartz-arenitic sands are largely found in refractory minerals, whereas major elements in feldspars and lithic fragments are effectively removed by intense tropical weathering. Hence, future use of tectonic-affinity diagrams should rely on trace-element geochemistry. Sandstones derived from the Sierra Nevada continental arc in California have QFL quartz fractions below 60%, even though the source magmatic arc has significant modal quartz. This observation suggests a “climate cap,” which does not “allow” formation of more quartzose sediments. In contrast, tropical weathering on Puerto Rico removes this climate cap allowing the creation of quartz-arenitic sands from a source rock containing limited quartz. It is remarkable that quartz-arenitic sands occur on Puerto Rico, sourced from a provenance area containing extremely limited quantities of modal quartz (estimated at less than 5%) in an oceanic-arc environment bounded by two active subduction zones. Quartz-arenitic sands and sandstones are not uniquely continental nor of cratonal origin; chemical weathering is fundamentally important for the origin of first-cycle quartz-arenitic sands.","PeriodicalId":17044,"journal":{"name":"Journal of Sedimentary Research","volume":null,"pages":null},"PeriodicalIF":2.0000,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sedimentary Research","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.2110/jsr.2023.016","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOLOGY","Score":null,"Total":0}
引用次数: 0

Abstract

Siliciclastic sandstone composition on the island of Puerto Rico, part of the Greater Antilles, was influenced by both tectonic setting and climate. Cretaceous through Eocene volcanic and plutonic rocks on Puerto Rico formed in an oceanic-arc setting. Sandstones deposited during arc volcanism are quartz-poor lithic and feldspatholithic arenites, whose geochemistry largely matches that of the oceanic-arc volcanic and plutonic rocks on Puerto Rico. After cessation of volcanism on Puerto Rico during collision of the Greater Antilles Island arc with the Bahamas Bank, an Oligocene through Holocene overlap assemblage was deposited unconformably above the arc deposits in the North Coast and South Coast basins of Puerto Rico. The overlap assemblage consists of some siliciclastic material, but largely shallow-water carbonate deposits. Siliciclastic deposition in the overlap assemblage reflects the volcanic-arc source, plus quartz derived from plutons exposed during uplift. In the Pleistocene and Holocene (and possibly earlier), poorly consolidated quartz-arenitic sands with SiOR2R values from 92 to 98% were deposited in the overlap assemblage. On geochemical tectonic-affinity diagrams, the lithic sandstones plot, as expected, in or near the fields for oceanic-arc provenance. However, the quartz-arenitic sands plot incorrectly in the passive-margin field when considering major elements, and correctly in or near the oceanic-arc field when considering trace elements. Trace elements in the quartz-arenitic sands are largely found in refractory minerals, whereas major elements in feldspars and lithic fragments are effectively removed by intense tropical weathering. Hence, future use of tectonic-affinity diagrams should rely on trace-element geochemistry. Sandstones derived from the Sierra Nevada continental arc in California have QFL quartz fractions below 60%, even though the source magmatic arc has significant modal quartz. This observation suggests a “climate cap,” which does not “allow” formation of more quartzose sediments. In contrast, tropical weathering on Puerto Rico removes this climate cap allowing the creation of quartz-arenitic sands from a source rock containing limited quartz. It is remarkable that quartz-arenitic sands occur on Puerto Rico, sourced from a provenance area containing extremely limited quantities of modal quartz (estimated at less than 5%) in an oceanic-arc environment bounded by two active subduction zones. Quartz-arenitic sands and sandstones are not uniquely continental nor of cratonal origin; chemical weathering is fundamentally important for the origin of first-cycle quartz-arenitic sands.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
波多黎各硅质碎屑砂岩的气候-构造演化:从岩屑砂质到海洋岛弧背景下的石英砂质砂
波多黎各岛是大安的列斯群岛的一部分,岛上的硅屑砂岩成分受构造环境和气候的影响。波多黎各的白垩纪至始新世火山岩和深成岩形成于大洋弧环境。弧火山作用时期沉积的砂岩为石英含量较低的岩屑和长石质砂粒岩,其地球化学特征与波多黎各的海弧火山岩和深成岩基本一致。在大安的列斯岛弧与巴哈马海岸碰撞期间,波多黎各火山活动停止后,一个渐新世到全新世的重叠组合不整合地沉积在波多黎各北海岸和南海岸盆地的弧矿床之上。重叠组合由一些硅塑性物质组成,但主要是浅水碳酸盐矿床。叠置组合中的硅屑沉积反映了火山弧源,加上隆升期间暴露的岩体石英。更新世-全新世(可能更早)叠置组合中沉积有较差固结的石英砂,SiOR2R值为92 ~ 98%。在地球化学构造亲和图上,岩屑砂岩如预期的那样,位于或靠近洋弧物源区。然而,石英-砂质砂在主元素上不正确地定位在被动边缘区,在微量元素上不正确地定位在洋弧区或洋弧区附近。石英砂中的微量元素主要存在于难熔矿物中,而长石和岩屑中的主要元素在强烈的热带风化作用下被有效地去除。因此,构造亲和图的未来应用应该依赖于微量元素地球化学。尽管源岩浆弧含有大量的模态石英,但来自加州内华达山脉大陆弧的砂岩的QFL石英含量低于60%。这一观察结果表明存在“气候帽”,这“不允许”形成更多的石英沉积物。相比之下,波多黎各的热带风化除去了这种气候帽,允许从含有有限石英的烃源岩中产生石英-砂质砂。值得注意的是,石英-砂质砂产于波多黎各,其物源区含有极少量的模态石英(估计少于5%),位于两个活动俯冲带边界的大洋弧环境中。石英砂质砂和砂岩既不是大陆的,也不是克拉通的;化学风化作用对第一旋回石英砂的形成具有重要意义。
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 去求助
来源期刊
CiteScore
3.80
自引率
5.00%
发文量
50
审稿时长
3 months
期刊介绍: The journal is broad and international in scope and welcomes contributions that further the fundamental understanding of sedimentary processes, the origin of sedimentary deposits, the workings of sedimentary systems, and the records of earth history contained within sedimentary rocks.
期刊最新文献
Recognition of cross-shore dynamics of longshore bars in upper-shoreface deposits of prograding sandy coastal barriers Deep-Water Fan Hierarchy: Assumptions, Evidence, and Numerical Modelling Analysis Anatomy of Niger and Benue river sediments from clay to granule: grain-size dependence and provenance budgets Random and time-persistent depositional processes in turbidite successions: an example from the marine deep-water Aoshima Formation (Neogene, Kyushu Island, southwest Japan) Rapid diagenesis and microbial biosignature degradation in spring carbonates from Crystal Geyser, Utah, U.S.A.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1