EAR-PF:   A new archive of Paleoarchean ocean chemistry: the 3.24 Ga Panorama volcanogenic massive sulfide district, Western Australia

GSTDTAP

项目编号	1725784
	EAR-PF: A new archive of Paleoarchean ocean chemistry: the 3.24 Ga Panorama volcanogenic massive sulfide district, Western Australia
	Benjamin Johnson
主持机构	Johnson Benjamin W
项目开始年	2017
	2017-10-01
项目结束日期	2019-09-30
资助机构	US-NSF
项目类别	Fellowship
项目经费	174000(USD)
国家	美国
语种	英语
英文摘要	Dr. Benjamin Johnson has been granted an NSF EAR Postdoctoral Fellowship to carry out research and education plans at the University of Colorado. The investigation will focus on examining the biogeochemistry of altered oceanic crust from the Paleoarchean (3,400 to 3,200 million years ago), a crucial time in Earth evolution. Dr. Johnson will be deciphering the role of planetary geochemical and geologic processes on biological evolution and nutrient cycling. The education plan will focus on interacting with a wide range of audiences through programs at the University of Colorado sharing knowledge on early Earth and astrobiology. The PI will engage a diverse group of students through CU-Boulder's Summer Multicultural Access to Research Training (SMART) initiative, advise undergraduate research through the Undergraduate Research Opportunities Program (UROP), and promote science education by utilizing resources of the Science Education Initiative (SEI), SAGANet, and the Cooperative Institute for Research in Environmental Sciences (CIRES). The overall goal of this research is to address four outstanding questions in biogeochemistry during the Paleoarchean: what controls the delta-18O value of Paleoarchean seawater? does hydrothermal circulation add or remove N from the Paleoarchean ocean? was sulfate in the Paleoarchean ocean high or low? and what is the depth of Paleoarchean mid-ocean ridges? While previous work has utilized sedimentary rock archives to elucidate Paleoarchean mineral chemistry and surface conditions, in this project, the PI will use a new archive of Paleoarchean mineral chemistry: hydrothermal deposits. Specifically, the 3.24 Ga Panorama volcanogenic massive sulfide (VMS) district in Western Australia, which represents a remarkably complete section of hydrothermally altered oceanic crust, including heat source, a 7 km thick outcrop of volcanic crust, and sedimentary cover serves as an archive of Paleoarchean biogeochemistry. The area has been investigated by the economic geology community, but has of yet not been utilized to answer questions of Earth history.
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/72045
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Benjamin Johnson.EAR-PF: A new archive of Paleoarchean ocean chemistry: the 3.24 Ga Panorama volcanogenic massive sulfide district, Western Australia.2017.