U/Pb Zircon dating of the Kane Oceanic Core Complex, MAR

凯恩海洋核杂岩的 U/Pb 锆石定年，三月

• 批准号: 0752558
• 负责人: Michael Cheadle
• 金额: $ 12.13万
• 依托单位: University of Wyoming
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0752558&HistoricalAwards=false
• 关键词: Pb; Zircon; dating; Kane; Oceanic

Intellectual Merit: There remain many unanswered questions about the formation of mid-ocean ridges and the speed at which large detachment faults, which seem to be prevalent in many parts of the seafloor, move. This project uses seafloor rocks (gabbros and late stage felsic dikes) and state-of-the-art geochronology techniques to investigate the movement of detachment faults associated with the Kane Oceanic Core Complex on the mid-Atlantic Ridge. Rock samples are in-hand. Dates will be obtained using single zircon U/Pb to determine the emplacement ages of crustal gabbros. Analyses will be carried out using the SHRIMP ion probe at Stanford. To cross-check ages, seafloor magnetic anomaly data will be compared to the U/Pb zircon dates. Results should determine the rates of plate spreading and detachment faulting in the area, which will allow generation of a crustal-accretion timeline for the Kane Megamullion Core Complex.Broader Impacts: This research supports two investigators at an institution in an EPScOR state, one of whom is female, and includes a graduate student training component. The work is complementary to both the International Ocean Drilling Program as well as the RIDGE 2000 Program, both of which are NSF-funded research initiatives.

智力优势：关于洋中脊的形成和似乎在海底许多地方普遍存在的大型滑脱断层的移动速度，仍有许多问题没有得到解答。 该项目使用海底岩石（辉长岩和晚期长英质岩脉）和最先进的地质年代学技术来调查与大西洋中脊凯恩海洋核心复合体相关的拆离断层的运动。 岩石样本到手了 用单颗粒锆石U/Pb测定地壳辉长岩的侵位年龄。分析将使用斯坦福大学的SHRIMP离子探针进行。 为了交叉检查年龄，将海底磁异常数据与U/Pb锆石年龄进行比较。 结果应确定在该地区的板块扩张和剥离断层的速度，这将允许生成的地壳增生时间轴的凯恩Megamullion核心Complex.Broader影响：这项研究支持在EPSCOR状态的一个机构，其中一个是女性的两名调查人员，并包括研究生培训部分。 这项工作是对国际大洋钻探计划和海脊2000计划的补充，这两个计划都是国家科学基金会资助的研究计划。