收稿日期: 2003-07-30
修回日期: 2003-10-08
网络出版日期: 2004-02-20
基金资助
国家重点基础研究发展规划项目(编号：2001CB209132)，国家自然科学基 金重大项目(编号：49794044)资助.
THE ELEMENT DISTRIBTUING RELATION AND THE ABILITY OF CO2 RELEASED OF CARBONATE CO NTACT METAMORPHIC BELTS IN SUNJIAYAO AREA, THE NORTHEAST EDGE OF THE SONGLIAO B ASIN
Received date: 2003-07-30
Revised date: 2003-10-08
Online published: 2004-02-20
李振生;刘德良;杨晓勇;谈迎;杨强;王伯长;郑德山;王凤来;孙占强; . 松辽盆地东北缘孙家窑地区碳酸盐岩接触变质带元素分配关系和CO2定量释放[J]. 天然气地球科学, 2004 , 15(1) : 20 -27 . DOI: 10.11764/j.issn.1672-1926.2004.01.20
To provide quantitative evidence, that dioxide carbon is re leased in carbonate contact metamorphism, the distributing relation of main and rare earth elements and the quantity of CO2 released in carbonate contact metamorphic belts are researched in the northeast edge of Songliao basin. The mo st characters are the enrichment of silicon and the loss of carbon and calcium, and there is a linear relation among CaO, SiO2 and ΣREE. The element cont ent and the REE pattern more tend to that of granite with the metamorphic degree deeper. The reasons, which cause those, are mixture of carbonate and fluid, the variety of REE in silification and mineralization of carbonate and the enrichme nt of light REE in carbonate recrystallization. The volume ratio of the amount o f dioxide carbon released and the rock is from 2.7 to 256.7, which prove that in organic CO2, which is released in carbonate contact metamorphism, is a pot ent gas source.
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