Collaborative Research: Subduction and Exhumation of Ultrahigh-Pressure Rocks: Field and Drilling Petrotectonic Studies in Eastern China

合作研究：超高压岩石的俯冲和折返：中国东部岩石构造现场和钻探研究

• 批准号: 0507331
• 负责人: Douglas Rumble
• 金额: --
• 依托单位: Carnegie Institution of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-15 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0507331&HistoricalAwards=false
• 关键词: Collaborative; Research; Subduction; Exhumation; Ultrahigh

0507331RumbleThis project will continue geochemical and chronological analyses of drill core and outcrop samples obtained in the course of studying an ultrahigh-pressure (UHP) terrane in China. The Chinese Continental Drilling Project (CCSD), in the Donghai area of the Sulu terrane, provides a unique opportunity to study this important belt in three dimensions. The drilling is just now winding up with the completion of several shallow holes and one 5-km deep borehole. Field studies of the Dabie-Sulu belt and the initial studies of borehole samples have provided many new insights into the processes involved in the subduction and exhumation of continental material and into the processes of high P - low T metamorphism; presently a "hot topic" in earth sciences. Specifically, the Dabie-Sulu suture zone appears to be one of the best places in the world to address the conditions under which crustal rocks are taken to depths of more than 100 km and then returned to the surface, as well as the question of how mantle rocks from depths of 200 km are transported to shallow depths and incorporated into subducted continental slabs or mountain belts. The project is the continuation of the PI's long term collaborations with Chinese colleagues who have played a major role in the drilling. The major US role involves detailed mineralogical studies of drill core samples.

0507331Rumble该项目将继续对在中国超高压（UHP）地体研究过程中获得的钻芯和露头样本进行地球化学和年代学分析。 位于苏禄地体东海地区的中国大陆钻探项目（CCSD）为从三个维度研究这一重要地带提供了独特的机会。 目前，钻探工作刚刚结束，已完成多个浅孔和一个 5 公里深的钻孔。 大别-苏鲁带的实地研究和钻孔样品的初步研究为大陆物质俯冲和折返过程以及高磷-低温变质作用过程提供了许多新的见解； 目前是地球科学的“热门话题”。具体来说，大别-苏鲁缝合带似乎是世界上解决地壳岩石被带到100多公里深处然后返回地表的条件以及200公里深处的地幔岩石如何被运移到浅层并融入俯冲大陆板或山带的最佳地点之一。 该项目是项目负责人与在钻探中发挥重要作用的中国同事长期合作的延续。 美国的主要作用涉及钻芯样本的详细矿物学研究。