本文關(guān)鍵詞： 三道灣子金礦 碲化物礦物 晶胞參數(shù) X射線衍射　出處：《中國(guó)地質(zhì)大學(xué)(北京)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：黑龍江三道灣子金礦是典型的碲化物型金礦床,礦床中90%以上的金存在于碲化物中,碲的晶體化學(xué)性質(zhì)是該領(lǐng)域最為關(guān)注的問題,礦床中豐富的碲化物礦物種類,對(duì)碲化物礦物晶體化學(xué)研究有重要的意義,同時(shí)為研究碲化物型礦床以及對(duì)碲化物礦物本身的礦物學(xué)內(nèi)容的研究提供一個(gè)非常好的機(jī)會(huì)。本文使用光學(xué)顯微鏡和掃描電子顯微鏡(帶能譜)分析礦床中碲化物礦物的產(chǎn)狀和共生組合,在此基礎(chǔ)上通過挑選碲化物礦物的單礦物顆粒,利用電子探針和X射線粉晶衍射研究碲化物礦物的晶胞參數(shù),以及探討碲化物礦物成分變化對(duì)礦物晶胞參數(shù)的影響。通過X射線粉晶衍射分析,得到該礦床中碲銀礦晶胞參數(shù)平均值為a0=0.8086nm、b0=0.4476nm、co=0.8968nm、α=90.00°、β=123.21°、γ=90.00°,都是單斜晶系,碲金銀礦為等軸晶系礦物,其晶胞參數(shù)平均值為a0=1.0405nm,表明碲銀礦、碲金銀礦是在溫度較低的環(huán)境下形成的。結(jié)合碲化物礦物的成分及其晶胞參數(shù)分析認(rèn)為,碲銀礦中Te和Ag含量的變化對(duì)晶胞參數(shù)的影響相對(duì)較大些,Au對(duì)晶胞參數(shù)的影響相對(duì)較弱一些,具體表現(xiàn)為:a0與Ag含量呈弱的負(fù)相關(guān)性,b0與Ag含量呈弱的正相關(guān)性,c0與Ag含量呈明顯的正相關(guān)性;a0與Te含量呈弱的正相關(guān)性,b0、c0與Te含量呈弱的負(fù)相關(guān)性;a0與Au含量呈弱的正相關(guān)性,c0與Au呈非常弱的負(fù)相關(guān)性,b0與Au含量呈非常弱的負(fù)相關(guān)性。碲銀礦中銀和碲含量變化對(duì)晶胞體積的影響較為明顯,金含量變化對(duì)晶胞體積的影響非常小。具體表現(xiàn)為:碲銀礦中銀含量與晶胞體積呈弱的正相關(guān)性;碲含量與晶胞體積呈弱的負(fù)相關(guān)性;金含量與晶胞體積呈非常弱的正相關(guān)性。
[Abstract]:The Sandaowanzi gold deposit in Heilongjiang Province is a typical telluride type gold deposit in which more than 90% of gold is present in telluride. The crystal chemistry of tellurium is the most concerned problem in this field. The rich types of telluride minerals in the deposit are of great significance to the study of crystal chemistry of telluride minerals. It also provides a good opportunity to study the mineralogical contents of telluride deposits and the mineralogical contents of telluride minerals. In this paper, optical microscopy and scanning electron microscope (SEM) are used to study the mineralogical contents of telluride minerals. The occurrence and symbiotic assemblage of telluride minerals in the deposit are analyzed. On this basis, the unit cell parameters of telluride minerals were studied by means of electron probe and X-ray powder diffraction. The effect of mineral composition of telluride on the parameters of mineral unit cell is also discussed. By X-ray powder diffraction analysis, the average value of unit cell parameter of tellurium silver ore in this deposit is a 0. 8086 nm. B0D 0.4476nmCoC 0.8968nm, 偽 90.00 擄, 尾 123.21 擄, 緯 90.00 擄, all monoclinic systems. Tellurium gold and silver ore is an equiaxed system mineral, and the average unit cell parameter is a 0. 040 5 nm, indicating tellurium silver ore. Gold and silver tellurium ore was formed in a low temperature environment. In combination with the composition of telluride minerals and the analysis of cell parameters, it is concluded that the changes of Te and Ag contents in tellurium silver ores have relatively greater influence on the unit cell parameters. The effect of au on the unit cell parameters is relatively weak, which shows that there is a weak negative correlation between the content of Ag and the content of Ag, and there is a weak positive correlation between the content of Ag and the content of Ag, and the positive correlation between the content of C _ 0 and Ag is obvious. There was a weak positive correlation between 偽 _ 0 and Te content and a weak negative correlation between b _ (0) C _ (0) and Te content. There was a weak positive correlation between A0 and au content and a very weak negative correlation between A0 and au. The change of silver and tellurium content in tellurium silver ore has obvious influence on the unit cell volume. The effect of the change of gold content on the volume of unit cell is very small, which shows that the silver content in tellurium silver ore has a weak positive correlation with the volume of unit cell; There was a weak negative correlation between tellurium content and unit cell volume. There was a very weak positive correlation between gold content and unit cell volume.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.51

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