我于1983年11月至1984年4月对美国伯克利加州大学地质及地球物理系进行了为期四个多月的访问.这次访问主要是在联合国开发署资助下与H.R.Wenk教授合作进行南加州棕榈谷地区的糜棱岩研究,今将所了解到的有关科研、教学情况略述如下.H.R.Wenk教授是一个矿物学家,他讲授结晶矿物学(含晶体光学),X光结晶学和高级矿物学等课程.他擅长岩石和矿物变形方面的研究,精通X光结晶学和透射电子显微镜.多年来他在美国主要的矿物学杂志《美国矿物学家》以及国际知名杂志如《物理和化学矿物学》、《构造物理》、《岩石学矿物学论丛》(Contri.Miner.and Petro)等刊物上经常发表论著,截至今年上半年为止已发表著作不下120篇.1976年他曾主持编著《矿物学中的透射电子显微术》(Electronic Microscopy in Mineralcgy),对岩石学矿物学都有参 I conducted a four-month-long visit to the Department of Geology and Geophysics at the University of California, Berkeley, from November 1983 to April 1984. The visit was mainly conducted under the auspices of UNDP with Professor HR Wenk in Southern California The study of mylonites in the Palmdale area, which is now to be understood, is summarized as follows: Professor HRWenk is a mineralogist who teaches crystallographic mineralogy (including crystal optics), X-ray crystallography and advanced Mineralogy, etc. He is good at rock and mineral deformation research, X-ray crystallography and transmission electron microscopy.He has worked in many major mineralogical magazines such as American Mineralogist and well-known international magazines such as Physics and Chemistry Mineralogy “,” Tectonic Physics “,” Journal of Petrology and Mineralogy “(Contri.Miner.and Petro) and other publications often published, as of the first half of this year has been published for no less than 120. In 1976 he presided over the editorial ”Electronic Microscopy in Mineralcgy", with references to petrological and mineralogy