An isotopic study of siderites, dolomites and ankerites at high temperatures☆
An isotopic study of siderites, dolomites and ankerites at high temperatures☆
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DOI：
10.1016/0016-7037(86)90396-0
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发表时间：
1986-06
影响因子：
5
通讯作者：
J. Rosenbaum;S. Sheppard
中科院分区：
文献类型：
--
作者：
J. Rosenbaum;S. Sheppard
菱铁矿、白云石和铁白云石与“>103°”磷酸在高达150°C的温度下反应，使用McCrea（1950）技术的改进，在不到两小时内获得>99°产率。碳酸盐的δ 18 O与酸萃取的CO2的δ 18 O之间的氧分馏因子α为：菱铁矿白云石安山岩100 °C1.008811.009131.00901150°C1.00771--根据经验推导出的CaCO 3-（Ca，Mg）（CO 3）2-FeCO 3体系中碳酸盐的化学组成与103 In α在100°C时的函数之间的关系式为103 In α= 8.94XCaCO3+ 9.29XMgCO3+ 8.77XFeCO3其中Xi是组分i在碳酸盐中的摩尔百分比。
Siderite, dolomite and ankerite were reacted with “>103°” phosphoric acid at temperatures up to 150°C with >99° yields achieved in less than two hours, using a modification of the McCrea (1950) technique. The oxygen fractionation factors, α, between the δ18O of the carbonate and that of the acid-extracted CO2are:SideriteDolomiteAnkerite100°C1.008811.009131.00901150°C1.00771--An empirically derived relationship between the chemical composition of a carbonate in the CaCO3-(Ca, Mg)(CO3)2-FeCO3system and the function 103In α at 100°C is 103Inα= 8.94XCaCO3+ 9.29XMgCO3+ 8.77XFeCO3where Xiis the mole percent of component i in the carbonate.