Collaborative Research: Deciphering the regional-versus-global aspects of the Toarcian (Jurassic) Oceanic Anoxic Event in North America

合作研究：解读北美陶陶世（侏罗纪）海洋缺氧事件的区域与全球方面/ benjamin Gill，弗吉尼亚理工大学，ar - 13247551 / michael Formolo，塔尔萨大学，ar - 13247551 / abstract地质记录包含了许多过去与环境变化相关的生物危机实例。这些事件可以被认为是过去的实验，为理解当前和未来地球表面系统的动力学提供了一个窗口。中生代（2.52亿至6500万年前）的海洋缺氧事件（oae）是与当前地球变化特别相关的例子。这些间隔是值得注意的，因为它们的特征是广泛的海洋缺氧和灭绝事件。oae也发生在全球快速变暖和全球碳循环受到严重干扰的时期，这被认为与温室气体水平的增加有关。本次研究的目标是中生代最古老的OAE——早侏罗世的Toarcian OAE（大约1.83亿年前）。过去对这一事件的研究已经确定了全球碳和硫循环的主要干扰以及广泛的海洋缺氧的发生。然而，到目前为止，这些Toarcian OAE研究大多来自欧洲一个相对有限的地理区域。托瓦西亚地球化学记录的不完整导致了关于元素循环变化的全球性质和海洋缺氧的地理范围的积极争论。本研究将研究北美黑色页岩和碳酸盐岩中Toarcian OAE的无机和有机地球化学记录，以评估该事件的全球与区域性质。此外，这些新数据将与来自欧洲的现有数据整合在一起，以一种全面的建模方法来测试触发、维持和终止这一事件的假设机制。这项研究将有三个主要的更广泛的影响贡献。第一个将是弗吉尼亚理工大学和塔尔萨大学的研究生和早期职业科学家的发展。第二项是通过弗吉尼亚理工大学的地球科学博物馆发展一个教育项目，旨在让公众了解地球上过去的环境变化。地球科学博物馆提供了该地区为数不多的公共科学场所之一，它提供了一个很好的场所，可以接触到通常不会接触到这门科学的部分人口。最后一项贡献将是通过塔尔萨本科生研究挑战（TURC）指导本科生研究人员。这个项目专门为本科生和社区外展提供研究便利。

Collaborative Research: Deciphering the regional-versus-global aspectsof the Toarcian (Jurassic) Oceanic Anoxic Event in North AmericabyBenjamin Gill, Virginia Tech University, EAR-1324752Michael Formolo, University of Tulsa, EAR-1324751ABSTRACTThe geologic record contains many past instances of biological crises linked to environmental change. These events can be thought of as past experiments that offer a window into understanding the dynamics of the current and future Earth surface system. The Oceanic Anoxic Events, or OAEs, of the Mesozoic Era (252 to 65 million years ago) are particularly relevant examples to the present changes on Earth. These intervals are notable because they are characterized by widespread marine anoxia and extinction events. OAEs also occur during times of rapid global warming and large disturbances to the global carbon cycle, thought to be associated with increased levels of greenhouse gases. The target of this investigation is the oldest of the Mesozoic OAEs -- the Toarcian OAE of the Early Jurassic (approximately 183 million years ago). Past studies of this event have identified major disturbances to the global carbon and sulfur cycles and the occurrence of widespread marine anoxia. However, to date, the majority of these Toarcian OAE studies come from a relatively confined geographical area in Europe. The incomplete Toarcian geochemical record has led to active debates regarding the global nature of both the changes in the element cycles and the geographic extent of marine anoxia. This study will investigate both the inorganic and organic geochemical record of the Toarcian OAE in North American black shales and carbonates to assess the global-versus-regional nature of the event. Further, these new data will be integrated with the available data from Europe in a comprehensive modeling approach that will test the hypothesized mechanisms that triggered, maintained and terminated this event.This study will have three main broader impact contributions. The first will be the development of graduate students and early career scientists at Virginia Tech and the University of Tulsa. The second will be the development of an educational program through the Museum of Geosciences at Virginia Tech aimed to inform the public about past environmental change on Earth. The Museum of Geosciences offers one of only a few public science venues in the region, and it provides an excellent venue for reaching portions of the population that would not normally be exposed to this science. The last contribution will be the mentorship of undergraduate researchers through the Tulsa Undergraduate Research Challenge (TURC). This program specializes in facilitating research for undergraduate students and community outreach.