History of Magmatism and Crustal Evolution in the Central Greater Caucasus Mountain Range, Southern U.S.S.R.

苏联南部大高加索山脉中部岩浆作用和地壳演化史

• 批准号: 9106023
• 负责人: Jason Saleeby
• 金额: $ 10万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-01 至 1993-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9106023&HistoricalAwards=false
• 关键词: History; Magmatism; Crustal; Evolution; Central

The Greater Caucasus Mountain Range is a rapidly rising mountain belt driven by the collision of the Iranian-Turkish and Arabian continental blocks with the Russian craton. In cooperation with Soviet colleagues a number of problems bearing on the tectonic evolution of the northern Tethys ocean margin, the involvement of the Russian craton in active margin processes have been identified. These have significance for widely- applicable processes of intra- sialic rifting, the irregular response to deformation of irregular shapes of collisional blocks and in the recycling of compositionally heterogeneous basement nappes into new sialic crust by superposed batholithic magmatism. The work will focus on the structural setting and isotope geochemistry of the Chegem River Caldera and related rocks and possible relationships to the transcaucasus structural zone, U/Pb zircons geochronology of previously collected samples from the Bechasin, Fore Range and Main Range basement zones and the age and tectonic setting of the Kasbek diabase belt and related intrusions along the southern boundary zone. Results are expected to increase knowledge of sialic crustal genesis, mesozoic intra-sialic rifting and the neotectonic regime of this area.

大高加索山脉是一条迅速上升的山带，由伊朗 - 土耳其和阿拉伯大陆与俄罗斯克拉顿的碰撞驱动。 与苏联同事合作，在北部特提斯海洋边缘的构造演化方面存在许多问题，已经确定了俄罗斯克拉顿参与积极的边缘过程。 这些对于广泛适用的唾液内裂缝的过程具有显着性，对碰撞块不规则形状的变形的不规则反应以及将构图异质的基底napp纳普回收到超级氨基化岩石质量的新唾液壳中。 The work will focus on the structural setting and isotope geochemistry of the Chegem River Caldera and related rocks and possible relationships to the transcaucasus structural zone, U/Pb zircons geochronology of previously collected samples from the Bechasin, Fore Range and Main Range basement zones and the age and tectonic setting of the Kasbek diabase belt and related intrusions along the southern boundary zone. 预计结果将增加对唾液壳起源，中生代内部裂纹和该地区的新骨架状态的了解。