Experimental Petrological Study of Carbonatite and Its Significances on the Earth Deep Carbon Cycle

详细信息   

• 责任者：Song Wenlei (School of Earth and Space Sciences ; Peking University ; Beijing 100871 ; China) ; Xu Cheng
• 刊名：Geological Review
• 出版年：2012
• 卷期：58(4)
• 关键词：碳酸岩 ; carbonatites ; 火成岩 ; igneous rocks ; 碳循环 ; carbon cycle
• 页码：p.726-744
• 图表：12 illus., 2 tables, 161 refs.
• 分类号：0801
• issnNo：ISSN0371-5736
• isbnNo：CN11-1952/P

摘要

///Carbonatites are rare mantle-derived rocks on the Earth’s surface. Experimental studies show that near-solidus melts formed in a carbonated peridotite and crustal cyclic materials such as carbonated eclogite and pelite at pressures of more than 3 GPa have carbonatite compositions. More generally, it also shows that a very low degree of melting produces a carbonatitic liquid whereas a high degree of melting produces kimberlitic like or even basaltic like melts.  Experimental study of various carbonate silicate mineral assemblages shows that a significant amount of carbonates can be transported to the deep mantle without decarbonation during melting beneath the island arcs and those carbonates in the deep mantle likely induces the formation of carbonatitic melts, it points out that the subduction of crustal carbonate rocks be likely to have play an very important role in the genesis of the carbonatite.