SGER: The Time of Initiation and Chemical/Isotopic Characteristics of the Early Deccan Volcanism: A Study of the Drill Core Basalts, Deccan Traps, India

SGER：早期德干火山活动的起始时间和化学/同位素特征：印度德干圈闭钻芯玄武岩的研究

• 批准号: 9220119
• 负责人: Ahobila Murali
• 金额: $ 5万
• 依托单位: Lamar University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-01 至 1994-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9220119&HistoricalAwards=false
• 关键词: SGER; Time; Initiation; Chemical; Isotopic

This is a multi-institutional collaborative study of selected sequences of fresh basalt flows recovered from 3 to 5-km deep drill core sections from the western and eastern continental margins and offshore India, and also the samples from an -800-m drill core (Jamali Well Deccan volcanism. These studies include (a) 40Ar/39Ar dating of whole rock and plagioclase separates (incremental heating technique) and (b) major, minor, and trace element (XRF, INAA) and Sr, Nd, and Pb isotopic analyses. The data obtained on these unique drill core basalts will be integrated with the existing database of surface flows to generate a comprehensive model of temporal and chemical evolution for the entire Deccan province, but especially for the initial phases of flood basalt activity.

这是一项多机构合作研究，选取了从西部和东部大陆边缘以及印度近海3至5公里深的钻探岩心剖面中恢复的新鲜玄武岩流序列，以及-800米钻探岩心（Jamali Well Deccan火山）的样本。这些研究包括(a)整个岩石和斜长石分离物的40Ar/39Ar定年（增量加热技术）和(b)主要、次要和微量元素（XRF、INAA）以及Sr、Nd和Pb同位素分析。从这些独特的钻芯玄武岩上获得的数据将与现有的地表流动数据库相结合，以生成整个德干省的时间和化学演化的综合模型，特别是洪水玄武岩活动的初始阶段。