陆地原位宇宙成因核素(TCN)在地表过程与构造活动关系研究中的应用

APPLICATION OF IN SITU TERRESTRIAL COSMOGENIC NUCLIDE (TCN) TO THE STUDY OF RELATIONSHIP BETWEEN SURFACE PROCESSES AND TECTONIC ACTIVITY

大地构造、气候变化和地表过程间的耦合作用被视为今后10年内六大地学新课题之一,而从事这一重大课题研究的有效途经便是陆地原位宇宙成因核素的研究和应用。从目前该领域的研究实践来看,经常使用的是3He1、0Be1、4C2、1Ne2、6Al和36Cl核素,其中石英的26Al和10Be的配合使用最为普遍。通过陆地原位宇宙成因核素(TCN)方法基本原理的阐释,并结合当今国际上该领域利用10Be和26Al在暴露年龄与侵蚀速率、沉积物埋藏年龄以及河流下切速率等方面的工作实例,介绍陆地原位宇宙成因核素在地表过程以及地表过程与构造活动相互关系研究上的应用。

Coupling between tectonics, climatic change and surface processes has been recognized as one of the six promising research fields in the Earth science for next decade,while the application of in situ terrestrial cosmogenic nuclide （TCN） is a great approach for the research. From present studies,six in situ terrestrial cosmogenic nuclides （^3He,^10Be,^14C,^21Ne,^26Al,and ^36Cl） are thought to be quite useful,among them, combination of ^10Be and ^26Al in quartze is the most popular mean. In this paper,we attempt to briefly introduce the principle of the TCN, and through TCN, especially through applications of ^10Be and ^26Al pair to determination of exposure age,erosion rate,sediment burial age,and river incision rate,to demonstrate the coupling of surface processes and tectonics,in order to promote studies in the field in China.