Organic Geochemistry and Marine Research

提出了一个双重的研究战略，4个应用和2个蓝天项目，目前正在进行中，并计划在未来五年的任期。这些项目旨在改进石油和天然气勘探、渗漏探测和补救技术，并回答有关我们生物圈的性质及其与地圈相互作用的基本问题，应用研究倡议与近海新斯科舍省的碳氢化合物探测和环境影响研究有关。对于该计划的这一部分，正在进行一项环境脂质组学调查（项目1），以开发用于深海碳氢化合物渗漏检测的脂质生物测定法，目的是降低斯科舍斜坡沿着海上石油和天然气勘探的风险。 与此同时，还对从沿斜坡沿着的潜在渗漏点收集的气体进行了一次“成簇”甲烷同位素调查（项目2），目的是在下面的盆地内找到生成源岩的间隔，并进一步评估这些新的同位素信号如何被微生物与迁移气体的相互作用所改变。在这两个项目之后，将对斯科舍大陆架上的废弃威尔斯油井进行甲烷排放调查（项目3），以确定套管和井筒是否发生泄漏，然后评估这可能对海洋和大气造成的相关环境影响。最后的应用研究项目（项目4）将解决类型，丰度，和目标地层中沉积有机质的分子烃组成，目的是产生多分子烃指纹，可用于预测盆地内相关岩石单元的更广泛的层序地层位置。天空项目与天体生物学和深时保存研究有关，目的是解决在不寻常的地质条件下有机物质的保存潜力。第一个项目（项目5）是研究从生物过滤器中提取的极性脂质，这些生物过滤器已在美国加州纽芬兰和雪松高原的陆地蛇状泉钻孔中放置了一年多，以解释其微生物多样性并建立这些群落的代谢模式。最后，项目6将解决在加拿大Abitibi Subprovince的2.6 Ga晚太古代泥质岩中发现的古生物脂质的矿物学协会。

Presented is a two-fold research strategy of 4 applied and 2 blue skies projects that are currently underway and planned for the coming five-year term. These projects aim to improve technologies for oil and gas exploration, seepage detection and remediation as well as answer fundamental questions about the nature of our biosphere and its interaction with the geosphere.The applied research initiatives are associated with hydrocarbon detection and environmental impact studies for offshore Nova Scotia. For this portion of the program, an environmental lipidomics survey (project 1) is being conducted to develop lipid-based bioassays for deep marine hydrocarbon seep detection with the aim of de-risking offshore oil and gas exploration along the Scotian slope. In tandem with this is a clumped' isotopologues of methane survey (project 2) of gases collected from prospective seep sites along the slope that aims to find the generating source rock intervals within the underlying basin with further evaluations on how these novel isotope signals may become modified by microbial interactions with migrating gases. These two projects will be followed-up with a methane emissions survey (project 3) of abandoned wells on the Scotian shelf to determine if leakage of the casing and well bores is occurring and to then evaluate the associated environmental impacts this may have to the ocean and atmosphere. The final applied research project (project 4) will resolve the type, abundance, and molecular hydrocarbon composition of sedimentary organic matter in targeted strata with an aim of producing multi-molecular hydrocarbon fingerprints that can be used to predict the broader-level sequence stratigraphic position of the associated rock units within a basin.Blue-skies projects are associated with astrobiological and deep time preservation studies that aim to resolve the preservation potential of organic matter hosted in unusual geological conditions. The first project (project 5) is examining polar lipids extracted from biofilters that have been stationed for over one year within drill holes at terrestrial serpentinized springs in the Tablelands of Newfoundland and the Cedars, in California, USA to interpret their microbiological diversity and to establish the modes of metabolism for these communities. Lastly, project 6 will resolve the mineralogical associations to which archaeal lipid are found in 2.6 Ga Late Archean argillites of the Abitibi Subprovince of Canada.