| 中国上地幔角闪石及其成因意义 |
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| 引用本文： | 樊祺诚,刘若新.中国上地幔角闪石及其成因意义[J].矿物学报,1992,12(4):352-358,T001. |
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| 作者姓名： | 樊祺诚 刘若新 |
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| 作者单位： | 国家地震局地质研究所，国家地震局地质研究所，国家地震局地质研究所 北京 100029，北京 100029，北京 100029 |
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| 基金项目： | 国家自然科学基金(489710101) |
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| 摘 要： | 我国土地幔成因角闪石以高铝(一般>2.0)为特征,以TiO_2、Cr_2O_3含量差异相区别,划分为韭闪石和钛角闪石两大类。韭闪石又有四种不同的成因类型:贫铬、钛型(Cr_2O_3=0.15％,TiO_2=0.07％),富铬型(Cr_2O_3=2.18％),富钛型(TiO_2=3.14％)和富铬、钛型(Cr_2O_3=2.59％,TiO_2=3.16％)。除贫铬、钛型韭闪石发现于苏北-胶南高压变质岩石中外,其它三种韭闪石(产于大陆区)和钛角闪石(产于台湾西部)均来自各种地幔橄榄岩、辉石岩及新生代玄武岩中。不管它们的产出方式如何(填隙、嵌晶、巨晶和包裹体子矿物),都直接或间接与地幔流体的交代作用有关,但各具成因之特点。
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| 关 键 词： | 上地幔 角闪石 成因 中国 |
UPPER-MANTLE AMPHIBOLES FROM CHINA AND THEIR GENETIC IMPLICATIONS |
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| Fan Qicheng Liu Ruoxin Ma Baolin.UPPER-MANTLE AMPHIBOLES FROM CHINA AND THEIR GENETIC IMPLICATIONS[J].Acta Mineralogica Sinica,1992,12(4):352-358,T001. |
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| Authors: | Fan Qicheng Liu Ruoxin Ma Baolin |
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| Abstract: | Upper-mantle amphiboles from China are commonly characterized by high Al(>2.0) and distinguished from one another in TiO_2 and Cr_2O_3. They are divided into two types (pargasite and kaersutite). The pargasite may be saparated into four subtypes: Cr-Ti-poor (Cr_2O_3=0.15%, TiO_2= 0.07%), Cr-rich (2.18%), Ti-rich(3.14%) and Cr-Ti-rich(Cr_2O_3=2.59%, TiO_2=3.16%). Three subtypes of pargasite(Cr-rich, Ti-rich and Cr-Ti-rich) are distributed over the main continent of China and kaersutite occurs in west Taiwan. They are all derived from various mantle peridotites, pyroxenites and their host Cenozoic basaltic rocks. Only the Cr-Ti-poor pargasite found in high-pressure metamorphic rocks in northern Jiangsu and southern Shandong. It is suggested that all the upper-mantle amphiboles from China have their own genetic characteristics directly or indirectly related with mantle fluid metasomatism regardless of their occurrences. |
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| Keywords: | upper-mantle amphibole genetic type China |
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