摘要
"雪球地球"假说的提出解释了一些新元古代冰川现象,如低纬度和低海拔冰川沉积、帽碳酸盐岩、负的碳酸盐δ13C漂移和BIF铁矿等现象。尽管有不同的假说与解释,但"雪球地球"最为流行。"雪球地球"事件被认为起因于地球系统的变化,如Rodinia超大陆的裂解、超级地幔柱的活动及古地磁真极的漂移等。"雪球地球"的极端气候环境变化,促进了生命的演化,造成了寒武纪生物大爆发。
A hypothesis of 'snowball Earth' has been presented to explain phenomena related to the Neoproterozoic glaciations, such as the low-latitude and low-altitude glacial deposits, cap carbonates, negative δ^(13)C shifts, BIF, and others. Even though there are several hypotheses or theories to discuss the Neoproterozoic glacial events, the 'snowball Earth' hypothesis is still popular and predominant. The events of 'snowball Earth' have been considered to initiate from changes in Earth's system, such as the break-up of Rodinia supercontinent, activity of superplume, and paleomagnetic TPW. The extreme climate arisen from 'snowball Earth' may promote evolution of life and trigger the 'Cambrian Explosion'.
出处
《矿物岩石地球化学通报》
CAS
CSCD
2004年第3期233-238,共6页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金资助项目(40172015
40373011)
