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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第41卷

期数:

2019年第03期

页码:

327-331

栏目:

基础地质与矿产地质

出版日期:

2019-05-15

文章信息/Info

Title:

Effect of Temperature and Mass Concentration on the Hydrolysis of Fluorine-rich Hafnium Complex in High Temperature and High Pressure Fluids

文章编号:

1672-6561(2019)03-0327-05

作者:

刘军锋¹; 黄建军²; 李震¹; 刘晓文¹; 丁兴³

(1.长安大学 地球科学与资源学院,陕西 西安 710054; 2.陕西省地质调查院,陕西 西安 710054; 3.中国科学院广州地球化学研究所 同位素地球化学国家重点实验室,广东 广州 510640)

Author(s):

LIU Jun-feng¹;  HUANG Jian-jun²;  LI Zhen¹;  LIU Xiao-wen¹;  DING Xing³

(1. School of Earth Science and Resources, Chang’an University, Xi’an 710054, Shaanxi, China; 2. Shaanxi Institute of Geological Survey, Xi’an 710054, Shaanxi, China; 3. State Key Laboratory of Isotope Geochemistry, Guangzhou Instituteof Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China)

关键词:

Hf;  K₂HfF₆络合物;  水解;  高温高压;  富氟流体;  质量浓度;  累积水解平衡常数;  热液

Keywords:

Hf;  K₂HfF₆ complex;  hydrolysis;  high temperature and high pressure;  fluorine-rich fluid;  mass concentration;  cumulative hydrolysis equilibrium constant;  hydrothermal solution

分类号:

P595; O614.41⁺3

DOI:

-

文献标志码:

A

摘要:

Hf是一种高场强元素,在地壳中的丰度较低,往往以类质同象的形式进入锆石中。以氟铪酸钾(K₂HfF₆)络合物为研究对象,观察它们在富水热液中的水解程度,进而研究Hf元素在地质过程中的迁移行为。结果表明:K₂HfF₆络合物在热液条件下能发生一定程度的水解反应,总体趋势为络合物的初始质量浓度越低且反应的温度越高,其水解程度越剧烈,络合物的稳定性也就越低; 获得了高温高压条件下K₂HfF₆络合物的累积水解平衡常数。同时运用实验模拟的方法, 根据提取液中Hf元素含量来推测矿物结晶时富氟流体中Hf元素含量,若以K₂HfF₆络合物最高配位的离子团形迁移时,Hf与F元素之间的质量浓度比值为1.6,据此可以计算成矿流体所需的最小F元素含量。

Abstract:

Hf is a high field strength element(HFSE)with low abundance in the earth’s crust, and often enters zircon in the form of isomorphism. The migration behavior of Hf in natural geological processes was studied by observing the hydrolysis degree of K₂HfF₆ complex in hydrothermal solution. The results show that K₂HfF₆ complex could undergo hydrolysis reaction to a certain extent under hydrothermal conditions, and the general trend is that the lower the initial mass concentration of the complex and the higher the reaction temperature, the more severe the hydrolysis degree and the lower the stability of the complex; the cumulative hydrolysis equilibrium constant of K₂HfF₆ complex under high temperature and high pressure is obtained. At the same time, according to the content of Hf in the extraction solution, the content of Hf in the fluoride-rich fluid can be estimated based on the method of experimental simulation; if the ion group migrates with the highest coordination of K₂HfF₆, the ratio of mass concentrations between Hf and F is 1.6, so the minimum content of F required for the mineralization fluid can be calculated.

参考文献/References:

[1] RUDNICK R L,GAO S.Composition of the Conti-nental Crust[J].Treatise on Geochemistry:Second Edition,2014,4:1-15.
[2] CLAOUELONG J C,KING R W,KERRICH R.Archean Hydrothermal Zircon in the Abitibi Greenstone Belt:Constraints on the Timing of Gold Mineralisation[J].Earth and Planetary Science Letters,1990,98(1):109-128.
[3] GIERE R.Zirconolite,Allanite and Hoegbomite in a Marble Skarn from the Bergell Contact Aureole:Implications for Mobility of Ti, Zr and REE[J].Contributions to Mineralogy and Petrology,1986,93(4):459-470.
[4] GIERE R.Transport and Deposition of REE in H₂S-rich Fluids:Evidence from Accessory Mineral Assemblages[J].Chemical Geology,1993,110(1/2/3):251-268.
[5] MCNAUGHTON N J,MUELLER A G,GROVES D I.The Age of the Giant Golden Mile Deposit,Kalgoorlie,Western Australia:Ion-microprobe Zircon and Monazite U-Pb Geochronology of a Syn-mineralization Lamprophyre Dike[J].Economic Geology,2005,100(7):1427-1440.
[6] KEBEDE T,HORIE K,HIDAKA H,et al.Zircon ‘Microvein’ in Peralkaline Granitic Gneiss,Western Ethiopia:Origin,SHRIMP U-Pb Geochronology and Trace Element Investigations[J].Chemical Geology,2007,242(1/2):76-102.
[7] COLLINS W J,BEAMS S D,WHITE A J R,et al.Nature and Origin of A-type Granites with Particular Reference to Southeastern Australia[J].Contributions to Mineralogy and Petrology,1982,80(2):189-200.
[8] GAO J,JOHN T,KLEMD R,et al.Mobilization of Ti-Nb-Ta During Subduction:Evidence from Rutile-bearing Dehydration Segregations and Veins Hosted in Eclogite,Tianshan,NW China[J].Geochimica et Cosmochimica Acta,2007,71(20):4974-4996.
[9] DING X,HU Y H,ZHANG H,et al.Major Nb/Ta Fractionation Recorded in Garnet Amphibolite Facies Metagabbro[J].The Journal of Geology,2013,121(3):255-274.
[10] LEE B G,CHOI J W,LEE S E,et al.Formation Behavior of Anodic TiO₂ Nanotubes in Fluoride Containing Electrolytes[J].Transactions of Nonferrous Metals Society of China,2009,19(4):842-845.
[11] RAPP J F,KLEMME S,BUTLER I B,et al.Extremely High Solubility of Rutile in Chloride and Fluoride-bearing Metamorphic Fluids:An Experimental Investigation[J].Geology,2010,38(4):323-326.
[12] 何俊杰,丁 兴,王玉荣,等.温度、浓度对流体中氟钛络合物水解的影响:对深部地质过程中钛元素活动的制约[J].岩石学报,2015,31(3):802-810.
HE Jun-jie,DING Xing,WANG Yu-rong,et al.The Effect of Temperature and Concentration on Hydrolysis of Fluorine-rich Titanium Complexes in Hydrothermal Fluids:Constraints on Titanium Mobility in Deep Geological Processes[J].Acta Petrologica Sinica,2015,31(3):802-810.
[13] 何俊杰.热液体系中高场强元素富氟络合物的水解行为及活动性规律[D].广州:中国科学院广州地球化学研究所,2018.
HE Jun-jie.The Hydrolysis and Mobility of HFSE-F Complexes in Hydrothermal Conditions[D].Guangzhou:Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,2018.
[14] 丁 兴,何俊杰,刘灼瑜.热液条件下锐钛矿晶体生长的实验[J].地球科学,2018,43(5):1763-1772.
DING Xing,HE Jun-jie,LIU Zhuo-yu.Experimental Studies on Crystal Growth of Anatase Under Hydrothermal Conditions[J].Earth Science,2018,43(5):1763-1772.
[15] PHILIPPOT P.高压流体(1～3 GPa)的化学组成:自然观察与实验对比[J].地学前缘,1996,3(3/4):39-52.
PHILIPPOT P.The Chemistry of High-pressure Fluids(1 to 3 GPa)Natural Observations vs. Experimental Constraints[J].Earth Science Frontiers,1996,3(3/4):39-52.
[16] YARDLEY B W D,BODNAR R J.Fluids in the Continental Crust[J].Geochemical Perspectives,2014,3(1):1-123.
[17] 郑永飞.深俯冲大陆板块折返过程中的流体活动[J].科学通报,2004,49(10):917-929.
ZHENG Yong-fei.Fluid Activity During Exhumation of Deep-subducted Continental Plates[J].Chinese Science Bulletin,2004,49(10):917-929.

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备注/Memo

备注/Memo:

收稿日期:2019-02-11; 修回日期:2019-03-05 投稿网址:http://jese.chd.edu.cn/
基金项目:国家重点研发计划项目(2016YFC0600204)
作者简介:刘军锋(1979-),男,陕西宝鸡人,副教授,理学博士,E-mail:junfengliu@chd.edu.cn。

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更新日期/Last Update: 2019-05-20