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.

0507331RBLETHIS项目将继续在中国研究超高压（UHP）地形的过程中获得的钻头和露头样品的地球化学和时间顺序分析。 苏鲁地道的东海地区的中国大陆钻探项目（CCSD）为研究这一重要带的三维带提供了独特的机会。 钻孔刚刚结束了几个浅孔和一个5公里深的钻孔。 Dabie -Sulu带和钻孔样品的初步研究为涉及大陆材料的俯冲和挖掘过程以及高P-低T型变质的过程的过程提供了许多新的见解。 目前是地球科学中的“热门话题”。具体而言，达比 - 苏尔鲁缝合区似乎是世界上最好的地方之一，以解决地壳岩石被带到100公里以上的深度，然后返回地面，以及如何将200公里深度的地幔岩石转运到浅层深度，并将其运输到浅层深度，并将其运输到阳离子或山脉的山脉或山区山脉或山区山脉中。 该项目是PI与中国同事的长期合作的延续，这些中国同事在钻探中发挥了重要作用。 美国的主要作用涉及钻探核心样品的详细矿物学研究。