本文關(guān)鍵詞： 桃園銅礦 標(biāo)型特征 成因礦物學(xué) 礦床成因　出處：《石家莊經(jīng)濟(jì)學(xué)院》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：桃園銅礦床位于河北內(nèi)丘縣與臨城縣交界處,大地構(gòu)造位置屬中朝準(zhǔn)地臺(tái)的山西斷隆東部,太行拱斷束贊皇穹斷束西側(cè)。區(qū)內(nèi)主要出露地層為古元古界甘陶河群。本次研究在掌握礦床地質(zhì)特征基礎(chǔ)上,運(yùn)用成因礦物學(xué)理論,對(duì)本礦區(qū)不同成礦階段的黃鐵礦、黃銅礦、閃鋅礦的標(biāo)型組合、形態(tài)標(biāo)型特征、成分標(biāo)型特征以及物性標(biāo)型特征進(jìn)行分析,確定本礦床成礦物理化學(xué)條件、成礦物質(zhì)來源及礦床成因。通過野外地質(zhì)勘探和室內(nèi)測試研究,主要取得的認(rèn)識(shí)有:黃銅礦、黃鐵礦、閃鋅礦為本礦區(qū)主要的金屬礦物,根據(jù)測試分析,表明黃鐵礦、黃銅礦和閃鋅礦中稀土元素分布不均,表現(xiàn)為Eu和Ce虧損。主量元素電子探針結(jié)果表明,黃銅礦、黃鐵礦、閃鋅礦中硫皆虧損,說明其形成于硫逸度較低的環(huán)境中,由于硫逸度低,導(dǎo)致As元素進(jìn)入黃鐵礦(黃銅礦、閃鋅礦)晶格,產(chǎn)生代換。根據(jù)礦化蝕變期次及礦物共生組合,可將黃鐵礦分為三個(gè)世代,黃鐵礦的微量元素的分析結(jié)果顯示本礦區(qū)黃鐵礦為巖漿熱液成因。黃鐵礦硫同位素測試結(jié)果表明桃園銅礦硫源的深源性,說明硫源主要來源于地幔。根據(jù)閃鋅礦主量元素電子探針結(jié)果計(jì)算,桃園銅礦中閃鋅礦中Fe S含量在15.9%~17.50%。說明早期閃鋅礦的巖漿熱液為高-中溫。由閃鋅礦微量元素計(jì)算結(jié)果 In/Ga值小于1,說明晚期閃鋅礦的巖漿熱液為中-低溫。綜上桃園銅礦床的成因類型為火山-次火山熱液型礦床。
[Abstract]:Taoyuan copper deposit is located at the junction of Neiqiu County and Lincheng County, Hebei Province. The west side of the Zanhuang Dome of Taihang arch fault bundles. The main outcrop in the area is the Paleoproterozoic Gan Gan River Group. Based on the geological characteristics of the deposits, this study applied genetic mineralogical theory to the pyrite and chalcopyrite in different metallogenic stages of the mine. The typomorphic assemblage, morphological typomorphic characteristics, composition typomorphic characteristics and physical property typomorphic characteristics of sphalerite are analyzed to determine the ore-forming physicochemical conditions, ore-forming source and ore genesis of the deposit. The main knowledge obtained is that chalcopyrite, pyrite and sphalerite are the main metallic minerals in the mine. According to the test and analysis, it is shown that the distribution of rare earth elements in pyrite, chalcopyrite and sphalerite is uneven. The results of electron probe showed that the sulfur in chalcopyrite, pyrite and sphalerite were all depleted, which indicated that they were formed in the environment with low sulfur fugacity, which resulted in the entry of as into pyrite (chalcopyrite, chalcopyrite, chalcopyrite, chalcopyrite) due to the low sulfur fugacity. Sphalerite) lattice, resulting in substitution. According to the mineralization alteration stage and mineral symbiotic assemblage, pyrite can be divided into three generations, The analysis of trace elements in pyrite shows that the pyrite is magmatic hydrothermal origin, and the sulfur isotope test of pyrite indicates that the sulfur source of Taoyuan copper deposit is deep source. It shows that the sulfur source is mainly derived from the mantle. Based on the electron probe results of the major elements of sphalerite, The content of Fe S in sphalerite in Taoyuan Copper Mine is 15.9 ~ 17.50. It shows that the magmatic hydrothermal fluid of the early sphalerite is high to medium temperature. The In/Ga value of trace elements calculated from the sphalerite is less than 1, which indicates that the magmatic hydrothermal fluid of the late sphalerite is medium-low temperature. The genetic type of the upper Taoyuan copper deposit is volcanic-subvolcanic hydrothermal deposit.
【學(xué)位授予單位】：石家莊經(jīng)濟(jì)學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.41

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本文編號(hào)：1501539