COLLABORATIVE RESEARCH RUI: Testing mechanisms for regional dolomitization of Triassic carbonate platforms across the Nanpanjiang Basin of south China

合作研究 RUI：华南南盘江盆地三叠纪碳酸盐台地区域白云石化试验机制

• 批准号: 2041315
• 负责人: John Luczaj
• 金额: $ 16.39万
• 依托单位: University of Wisconsin-Green Bay
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-07-01 至 2025-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2041315&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; RUI; Testing; mechanisms

Dolomite and calcite are the minerals that make up the sedimentary rocks limestone and dolostone. Limestone is converted into dolostone by a chemical process called dolomitization in which waters flowing through the strata add magnesium, changing the mineralogy from calcite to dolomite. A wide variety of environments have been proposed for the process of dolomitization, ranging from Earth surface marine or saline lagoons to the deep subsurface realm with high temperature hydrothermal fluids. The chemistry and temperature of the dolomitizing fluids leaves a signature in the rock that differs depending on the environment of dolomitization. This study will evaluate the processes that cause dolomitization over vast areas. Results will improve understanding of mechanisms of formation for a rock that commonly contains aquifers, energy and mineral resources, and is widely used in construction materials. The project will stimulate interest in science for underrepresented women and minority groups through research projects, educational workshops, and published educational modules for undergraduates and high school students. This study will test mechanisms of dolomitization in outcrops of south China that provide a natural laboratory to evaluate regional distribution of both surface and deep subsurface environments. Within this framework, the temperatures and chemistry of dolomitization will be evaluated through microscopic analysis of mineral phases, heating and freezing experiments on fluids trapped within dolomite crystals, analysis of oxygen, carbon and strontium isotopes, and microanalysis of trace elements within dolomite crystals. Results will be valuable for understanding spatial distribution of dolomite resources, aquifers, and processes that operated over Earth’s history. Undergraduate students will complete field and laboratory work, conference presentations and senior theses. Women and minority students will be recruited through university workshops. Outreach will involve high school students from Upward Bound in research and summer courses. Course modules will be published on the Science Education Resource Center website.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

白云石和方解石是构成沉积岩石灰石和白云石的矿物，石灰石通过一种称为白云石化的化学过程转化为白云石，其中流经地层的水添加了镁，从而将矿物学从方解石转变为白云石。已经提出了白云石化过程，范围从地球表面海洋或咸水泻湖到具有高温热液流体的地下深处领域。白云石化流体在岩石中留下的痕迹因白云石化环境的不同而不同。这项研究将评估导致大面积白云石化的过程，结果将提高对通常含有含水层、能源和矿产资源的岩石形成机制的了解。该项目将通过研究项目、教育研讨会和为本科生和高中生发布的教育模块来激发代表性不足的妇女和少数群体对科学的兴趣。这项研究将测试白云石化的机制。在中国南方的露头中，为研究地表和深层地下环境的区域分布提供了一个天然实验室，在此框架内，将通过矿物相的微观分析、对白云石内流体的加热和冷冻实验来评估白云石化的温度和化学性质。晶体、氧、碳和锶同位素分析，以及白云石晶体内微量元素分析，结果对于了解白云石资源、含水层和运行过程的空间分布非常有价值。地球的历史。本科生将完成实地和实验室工作，会议演讲和高级论文将通过大学讲习班招募，来自Upward Bound的高中生将参与研究，暑期课程模块将在网上发布。科学教育资源中心网站。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

MECHANISMS FOR DOLOMITIZATION OF THE TRIASSIC YANGTZE PLATFORM IN THE NANPANJIANG BASIN, SOUTH CHINA

南盘江盆地三叠纪扬子台地白云石化机制

• DOI: 10.1130/abs/2022am-377753
• 发表时间: 2022
• 期刊: Geological Society of America Abstracts with Programs
• 作者: Ledbetter Ferrill, Nathaniel;Tesauro, Josephine;Hilbert, Arianna;Saxby, Justice;Li, Xiaowei;Wooton, Kathleen;Rasbury, E. Troy;Henkes, Gregory;Luczaj, John;Lehrmann, Daniel
• 通讯作者: Lehrmann, Daniel

ANALYSIS OF CARBONATE DIAGENESIS ON THE GREAT BANK OF GUIZHOU (SOUTH CHINA) USING GEOCHEMICAL, GEOTHERMOMETRIC, AND GEOCHRONOLOGICAL TECHNIQUES

利用地球化学、测温和地质年代学技术分析贵州大岸（华南）碳酸盐岩成岩作用

• DOI: 10.1130/abs/2022am-379397
• 发表时间: 2022
• 期刊: Geological Society of America Abstracts with Programs
• 作者: Saxby, Justice;Hilbert, Arianna;Tesauro, Josephine;Ledbetter Ferrill, Nathaniel;Mobasher, Neda;Li, Xiaowei;Rasbury, E. Troy;Henkes, Gregory;Lehrmann, Daniel;Luczaj, John
• 通讯作者: Luczaj, John

ENVIRONMENTS AND TIMING OF DOLOMITIZATION AND CARBONATE DIAGENESIS IN THE TRIASSIC YANGTZE PLATFORM IN THE NANPANJIANG BASIN, SOUTH CHINA

南盘江盆地三叠系扬子台地白云石化与碳酸盐岩成岩作用的环境与时限

• DOI: 10.1130/abs/2022am-377804
• 发表时间: 2022
• 期刊: Geological Society of America Abstracts with Programs
• 作者: Tesauro, Josephine;Ledbetter Ferrill, Nathaniel;Hilbert, Arianna;Saxby, Justice;Li, Xiaowei;Wooton, Kathleen;Henkes, Gregory;Rasbury, E. Troy;Luczaj, John;Lehrmann, Daniel
• 通讯作者: Lehrmann, Daniel

Unraveling overprinted formation mechanisms of massive dolostone in the Lower Triassic sequence of an isolated carbonate platform in Nanpanjiang Basin, south China

• DOI: 10.1016/j.sedgeo.2022.106240
• 发表时间: 2022-08
• 期刊: Sedimentary Geology
• 影响因子: 2.8
• 作者: Xiaowei Li;D. Lehrmann;J. Luczaj;B. Kelley;D. Cantrell;Mei-yi Yu;Nathaniel Ledbetter Ferrill

MECHANISMS OF DOLOMITIZATION OF THE LOWER TRIASSIC ANSHUN FORMATION OF THE YANGTZE PLATFORM: A CASE FOR REGIONAL HIGH TEMPERATURE DOLOMITIZATION IN THE NANPANJIANG BASIN, SOUTH CHINA

扬子地台下三叠统安顺组白云石化机制——以南盘江盆地区域高温白云石化为例

• DOI: 10.1130/abs/2022am-378801
• 发表时间: 2022
• 期刊: Geological Society of America Abstracts with Programs
• 作者: Hilbert, Arianna;Saxby, Justice;Tesauro, Josephine;Ledbetter Ferrill, Nathaniel;Li, Xiaowei;Rasbury, E. Troy;Henkes, Gregory;Wooton, Kathleen;Lehrmann, Daniel;Luczaj, John
• 通讯作者: Luczaj, John