摘要
岩石圈减薄及其对区域构造岩浆演化的控制是近十几年来深部研究中所取得的重要成果。我国华北地区岩石圈的厚度、物质组成和热状态在近４００Ｍａ来有过剧烈的变化；由古生代时大于２００ｋｍ的厚度和方辉橄榄岩为主的物质组成演化为现今１００ｋｍ左右的厚度和以二辉橄...
The conversion from thick cratonic lithosphere to thin oceanic lithosphere presents a major problem in the study of mechanism of continental lithospheric thinning. It is pointed out that the popular delamination model cannot be directly applied to the lithospheric thinning processe because of the unfavorable density contrast between cratonic lithosphere and asthenosphere. Based on recent studies on peridotite xenoliths and massifs as well as theoretical modeling results, it is believed that thermomechanic and chemical erosion play very important roles in lithospheric thinning. A model involving interacting thermo mechanic erosion and chemical erosion is tentatively proposed.
出处
《矿物岩石地球化学通报》
CAS
CSCD
1999年第1期3-7,共5页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金
关键词
橄榄岩包体
热-机械侵蚀
化学侵蚀
岩石圈减薄
peridotite xenoliths
thermo mechanic erosion
chemical erosion
lithospheric thinning
