| 川西义敦措莫隆含锡花岗岩铁叶云母矿物学研究 |
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| 引用本文： | 管士平,陈明.川西义敦措莫隆含锡花岗岩铁叶云母矿物学研究[J].沉积与特提斯地质,2001,21(1):50-62. |
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| 作者姓名： | 管士平 陈明 |
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| 作者单位： | 成都地质矿产研究所, |
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| 摘 要： | 通过对摸莫隆花岗岩中铁叶云母的矿物学研究，可得出如下结论：①可利用铁叶云母中的化学成分及H2O^＋，F^-,Cl^-来表征岩浆期后热液的性质和成岩成矿条件；②穆斯堡尔谱证实有3345%的Fe^3 进入四面体，并据此修正铁叶云母的晶体化学经验式；③Fe^2 的I.S，Q.S值与Fe/(Fe Mg)呈正相关，可定性反映其形成时温度和fo2;④Fe^2 在M1，M2晶位上的有序度能反映岩浆结晶温度高低和冷却速度快慢；⑤铁叶云母b0值大小主要与Fe^3 多少有关；⑥根据铁叶云母的化学成分判断措莫隆花岗岩属于含锡花岗岩；⑦根据铁叶云母的红外光谱及差热分析特征判断措莫隆花岗岩属于壳源型岩浆成因。
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| 关 键 词： | 铁叶云母 穆斯堡尔谱 含锡花岗岩 矿物学 黑云母 金矿床 成岩条件 成因 成矿条件 |
| 文章编号： | 1009-3850(2001)01-0050-13 |
| 收稿时间： | 2000/12/22 0:00:00 |
| 修稿时间： | 2000年12月22 |
Mineralogy of siderophyllite from the Sn-bearing granites in Comolong, Yidun, western Sichuan |
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| GUAN Shi-ping,CHEN Ming.Mineralogy of siderophyllite from the Sn-bearing granites in Comolong, Yidun, western Sichuan[J].Sedimentary Geology and Tethyan Geology,2001,21(1):50-62. |
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| Authors: | GUAN Shi-ping CHEN Ming |
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| Institution: | Chengdu Institute of Geology and Mineral Resources, Chengdu 610082, Sichuan, China |
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| Abstract: | The Comolong Sn polymetallic deposit located in the Yidun island arc zone, western Sichuan are believed to have a genetic affiliation to the late Yanshanian Comolong granites. Biotite is identified as an only silicate mineral with volatile components in the granites. The most important observations are that: (1) the chemical compositions and H 2O , F - and Cl - in siderophyllite may be used to characterize the rock and ore forming conditions and the nature of magmas; (2) the crystallochemical formula should be revised in that 33.45% of Fe 3 turned out by Mossbauer spectra to be aligned in the siderophyllite tetrahedrons; (3) there is a positive correlation between I.S and Q.S volumes of Fe 2 and Fe/(Fe Mg) ratios for siderophyllite, which may indicate the temperatures and oxygen fugacity during the formation of granite masses; (4) Fe 2 ordering at M 1 and M 2 sites may reflect the crystallization temperatures and cooling speeds of magmas; (5) the b 0 values for siderophyllite are always changeable as a function of Fe 3 contents; (6) the Comolong granites can be assigned, deduced from the chemical compositions of siderophyllite, to the Sn bearing granites, and (7) the Comolong granites may be postulated to be of crustal derived magmatic origin in the light of infrared absorption spectroscopy and differential thermal analysis. |
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| Keywords: | siderophyllite Mossbauer spectrum Sn bearing granite |
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