Collaborative Research: Understanding the Late Paleozoic Icehouse from a Southern Hemisphere (Paranaì Basin, Brazil) paleo-perspective

合作研究：从南半球（巴西巴拉那盆地）古角度了解晚古生代冰室

• 批准号: 1729219
• 负责人: John Isbell
• 金额: $ 20.57万
• 依托单位: University of Wisconsin-Milwaukee
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1729219&HistoricalAwards=false
• 关键词: Collaborative; Research; Understanding; Late; Paleozoic

The late Paleozoic Ice Age is the longest-lived glacial interval of the past half billion years, sharing many parallels with the current icehouse in which humans evolved and live. During the Paleozoic icehouse (340 to 290 million years ago) atmospheric oxygen and carbon levels were anomalous, life moved onto land, the first wooded forests expanded across the Earth, and large-scale wildfires emerged. Thus, it is important that we develop a more complete understanding of the late Paleozoic Earth and its dynamic glaciation history. The glacial-marine Parana Basin, Brazil provides an ideal opportunity for this work and the project will include training for U.S. and Brazilian students through seminars, field and lab work, and exchange visits.This research will address three research objectives. First, an exportable, accurate and high-precision chronostratigraphic framework will be built by defining U-Pb zircon ages of unprecedented precision and accuracy for this region. This will permit testing of existing hypotheses of Gondwanan glaciation and will place constraints on the degree of synchronicity of the glaciations and establish the timing of terminal deglaciation in west-central Gondwana. Second, refined depositional and glaciation models will be developed through sedimentologic and detrital zircon provenance studies, integrated into the high-precision chronostratigraphic framework. This will place quantitative constraints on the timing, source, and geographic extent of glaciers feeding into the Parana Basin and permit reconstruction of changes in their glacial mass balance through time. Third, this research will develop U-Pb age-calibrated geochemical proxy records of continental climate variability that will test the hypothesis that major shifts in regional climate occurred in-step with periods of glacier advance/retreat and terminal deglaciation. This project will lead to a more complete understanding of icehouse to greenhouse transitions of the past.

晚古生代冰河时代是过去5亿年中最长的冰河时期，与人类进化和生活的冰窖有许多相似之处。在古生代冰库时期（3.4亿至2.9亿年前），大气中的氧和碳含量异常，生命转移到陆地上，第一批树木繁茂的森林在地球上扩张，大规模的野火出现。 因此，重要的是，我们开发一个更完整的了解晚古生代地球及其动态冰川的历史。巴西的巴拉那冰川海洋盆地为这项工作提供了一个理想的机会，该项目将包括通过研讨会、实地和实验室工作以及交流访问对美国和巴西学生进行培训。首先，通过对该地区前所未有的精确和准确的锆石U-Pb年龄的确定，建立一个可输出的、精确的、高精度的年代地层格架。这将允许测试现有的冈瓦纳冰川作用的假设，并将限制冰川作用的同步性程度，并建立在中西部冈瓦纳终端冰川消退的时间。第二，将通过沉积学和碎屑锆石来源研究，建立完善的沉积和冰川作用模型，并将其纳入高精度年代地层框架。这将对流入巴拉那盆地的冰川的时间、来源和地理范围进行定量限制，并允许重建冰川物质平衡随时间的变化。第三，这项研究将开发U-Pb年龄校准的地球化学代用记录大陆气候的变化，将测试的假设，在区域气候的重大变化发生在冰川前进/后退和终端冰川消退的阶段。该项目将导致对过去冰室到温室过渡的更完整的理解。

项目成果

HIGH-RESOLUTION AGE CONTROL FOR THE LATE PALEOZOIC ICE AGE SUCCESSIONS ACROSS SW AND SC GONDWANA ­­­­­­­­­­– IMPLICATIONS FOR CLIMATIC FORCING FOR THE END OF THE LPIA

对西冈瓦纳和南冈瓦纳古生代晚期冰河时代演替的高分辨率年龄控制对 LPIA 结束的气候强迫的影响

• DOI: 10.1130/abs/2018am-324163
• 发表时间: 2018
• 期刊: Geological Society of America Abstracts with Programs
• 作者: Griffis, Neil;Mundil, Roland;Mundil, Roland;Montañez, Isabel P.;Montañez, Isabel P.;Linol, Bastien;Linol, Bastien;de Wit, Maarten J.;de Wit, Maarten J.;Isbell, John L.
• 通讯作者: Isbell, John L.

Interpreting detrital modes and geochemistry of sandstones from the late Paleozoic Tepuel-Genoa Basin: Paleogeographic implications (Patagonia, Argentina)

解释晚古生代特普埃尔-热那亚盆地砂岩的碎屑模式和地球化学：古地理意义（阿根廷巴塔哥尼亚）

• DOI: 10.1016/j.jsames.2020.102858
• 发表时间: 2020
• 期刊: Journal of South American earth sciences
• 影响因子: 1.8
• 作者: Ciccioli, P. L.;Limarino, C. O.;Isbell, J.L.;Taboada, A. C.;Pagani, M. A.;Gulbranson, E.L.
• 通讯作者: Gulbranson, E.L.

A paleoclimatic reconstruction of the Carboniferous-Permian paleovalley fill in the eastern Paganzo Basin: Insights into glacial extent and deglaciation of southwestern Gondwana

帕甘佐盆地东部石炭纪-二叠纪古谷充填物的古气候重建：对冈瓦纳西南部冰川范围和消融的见解

• DOI: 10.1016/j.jsames.2019.102236
• 发表时间: 2019
• 期刊: Journal of South American Earth Sciences
• 影响因子: 1.8
• 作者: Pauls, Kathryn N.;Isbell, John L.;McHenry, Lindsay;Limarino, C. Oscar;Moxness, Levi D.;Schencman, L. Jazmin
• 通讯作者: Schencman, L. Jazmin

Detrital zircon geochronology and provenance of glaciogenic strata of the Middle Carboniferous San Eduardo Formation, Calingasta-Uspallata Basin, NW Argentina

阿根廷西北部卡林加斯塔-乌斯帕亚塔盆地中石炭统圣爱德华多组冰川成因地层的碎屑锆石年代学和物源

• DOI: 10.1130/abs/2019am-337940
• 发表时间: 2019
• 期刊: Geological Society of America Abstracts with Programs
• 作者: Malone, J. E.

CARBONIFEROUS GLACIOTECTONIZED SEDIMENTS ON THE WESTERN RIO GRANDE DO SUL SHIELD, PARANÁ BASIN, SOUTHERNMOST BRAZIL

巴西最南端帕拉尼盆地南里奥格兰德州盾西部的石炭质冰川构造沉积物

• DOI: 10.1130/abs/2017am-303554
• 发表时间: 2017
• 期刊: Geological Society of America Abstracts with Programs
• 作者: Fedorchuk, Nicholas D.;Isbell, John L.;Griffis, Neil;Montanez, Isabel P.;Vesely, Fernando;Iannuzzi, Roberto;Rosa, Eduardo L.M.;Roesler, Guilherme A.
• 通讯作者: Roesler, Guilherme A.