Russian - U.S. Scientific Cooperative Project: Petrotectonic Study of Ultrahigh-Pressure Rocks in the Kokchetav Massif and the Maksyutov Complex of the Ural Mtns.

俄罗斯-美国科学合作项目：科克切塔夫地块和乌拉尔山脉马克修托夫杂岩超高压岩石的岩石构造研究。

• 批准号: 9304480
• 负责人: Robert Coleman
• 金额: $ 15.58万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-15 至 1997-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9304480&HistoricalAwards=false
• 关键词: Russian; U.S.; Scientific; Cooperative; Project

9304480 Coleman This United States-Russian multidisciplinary cooperative research project will involve field, petrologic, geochronologic and tectonic investigations of intracratonal metamorphic rocks in the Kokchetav Massif and the Maksyutov Complex of the Ural Mountains. Microdiamonds and/or coesite, which form during regional ultrahigh-P metamorphism at mantle depths, have been described from these rocks - their presence in regionally extensive complexes at the Earth's surface may imply the operation of tectonic processes of profound importance. Specific goals of the research include identifying and characterizing the composition of crystalline inclusions in garnet and zircon to establish the conditions of the ultrahigh metamorphism, delineating the P-T-t paths of various rocks, determining the geochemical characteristics of protoliths, and establishing ages of the metamorphic events through radiometric dating.

9304480科尔曼这一美国-俄罗斯多学科合作研究项目将涉及对乌拉尔山脉Kokchetav地块和Maksyutov杂岩的克拉通内变质岩进行实地、岩石学、地质年代学和构造学调查。 微金刚石和/或柯石英，形成于地幔深处的区域超高磷变质作用，已被描述为来自这些岩石-它们在地球表面区域广泛的复合体中的存在可能意味着具有深远意义的构造过程的运作。 研究的具体目标包括确定和表征石榴石和锆石中结晶包裹体的成分，以确定变质作用的条件，描绘各种岩石的P-T-t轨迹，确定原岩的地球化学特征，并通过放射性测年确定变质事件的年龄。