摘要
在太阳系星云盘形成尘层过程中，由于浓差分带机制形成一系列夹心尘环。由C尘环中的C群球粒陨石物质聚合成的碳质球粒陨石小行星，在4．1～3．9Ga时陨击地球，导致了大陆酸性岩石的形成以及现今全球超大型矿床的分布格局。
In the evolution of nebular disk to dust -layer, a series of sandwich dust -rings. are formed owing to sedimentation zoning by concentration difference. During 4. 1 - 3. 9Ga, the planetesimals from dust-ring C composed of carbonaceous chondrites impacted the earth. It resulted in continental acid rocks to be formed and nowdays global distribution pattern of superlarge deposits.
出处
《浙江国土资源》
1995年第2期33-34,共2页
Zhejiang Land & Resources
关键词
超大型矿床
岩石圈
太阳系起源
superlarge deposits, lithosphere, origin of the solar system
