本文關(guān)鍵詞：黑龍江省綏陽—道河地區(qū)閻王殿組地層沉積環(huán)境與含礦性研究　出處：《中國地質(zhì)大學(xué)(北京)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 閻王殿組 變質(zhì)巖 含礦性 沉積環(huán)境 黑龍江省 道河

【摘要】：研究區(qū)位于太平河金銅多金屬成礦帶,本次主要采用礦物學(xué)和巖石地球化學(xué)對閻王殿組地層進行研究,根據(jù)研究成果對該地層的地層組合、巖相特征、形成的構(gòu)造環(huán)境、源區(qū)特征及其含礦性進行分析。閻王殿組地層巖石的顏色較暗,巖性主要為千枚巖、碳質(zhì)板巖、云母石英片巖,整體上呈淺變質(zhì)作用;研究區(qū)地層出露部位小褶曲等構(gòu)造較多,多在碳質(zhì)板巖和千枚巖層位,可為該地層元素的富集提供良好的場所。通過對該地層代表樣品進行巖石的主量元素、微量元素、稀土元素分析,得出該地區(qū)巖石具高硅鋁質(zhì)、富鉀貧鈉特征;Cu/Zn范圍為0.06-0.58之間,δCe1,說明水體富含Ce,巖石樣品Ce虧損,沉積環(huán)境為弱氧化或者還原環(huán)境沉積環(huán)境,Ce呈現(xiàn)弱負異常,屬于為正常淺海碎屑沉積。利用主量元素,通過判別公式對該地區(qū)的變質(zhì)巖進行正副變質(zhì)巖判別該地層的變質(zhì)巖屬于副變質(zhì)巖,其原巖為沉積巖,結(jié)合樣品的地球化學(xué)元素特征及其圖解,樣品多投在泥沙質(zhì)沉積巖區(qū),根據(jù)K-Rb圖解,樣品都投在中酸性源區(qū),原巖主要為長英質(zhì)物源區(qū),其形成可能為中酸性火山質(zhì)經(jīng)過搬運風(fēng)化,進行沉積,在此過程中有上地殼的古老沉積物加入;在不同構(gòu)造環(huán)境判別圖解中,絕大多數(shù)樣品投影點落入活動大陸邊緣區(qū)。地球化學(xué)特征表明,閻王殿組碎屑巖可能沉積于活動大陸邊緣環(huán)境。閻王殿組從下往上,ICV值則呈遞減趨勢,體現(xiàn)了風(fēng)化作用由弱到強,成分成熟度逐漸升高的特點,風(fēng)化較為嚴重,根據(jù)其風(fēng)化特征判斷源區(qū)氣候由寒冷、干燥、弱風(fēng)化向溫暖、濕潤、中等風(fēng)化演化。通過對該地層成礦元素Au、Ag、As、Sb、Pb、Bi、Hg、Zn、Cu進行分析,該地層成礦元素較為富集,金元素的富集系數(shù)達到15.72,其他元素也較為富集,Cu為虧損狀態(tài),可為該地區(qū)成礦提供有利的物質(zhì)來源,可能為礦源層。
[Abstract]:The study area is located in Taiping River gold copper polymetallic metallogenic belt, this mainly adopts the mineralogy and geochemistry of Yanwangdian group formation, according to the research results on the formation of the strata, lithofacies characteristics, tectonic settings, analyze the source characteristics and ore Yanwangdian group. Rock color the main lithology is dark, carbonaceous slate, phyllite, mica quartz schist, whole is shallow metamorphic strata in the study area; exposed part of the small fold structure is more, more in the carbonaceous slate and phyllite stratum, can provide a good place for the formation of element enrichment. The main elements of the rock. The formation of representative samples of trace elements, rare earth elements analysis, the area of rock with high silicon aluminum, potassium sodium depleted characteristics; the Cu/Zn range is between 0.06-0.58, Delta Ce1, the water is rich in Ce, Ce sedimentary rock samples losses. The environment for weak oxidation or reduction environment of sedimentary environment, Ce has a weak negative anomaly, which belongs to the normal shallow sea sediment. The main elements in the area of metamorphic rocks, metamorphic rocks of the metamorphic rock formation and discrimination by discriminant formula belongs to metamorphic, the original rock is sedimentary rocks, geochemical characteristics and graphic elements combined with the sample the samples cast in sandy sedimentary area, according to the K-Rb diagram, the samples are cast in the acid in the source area, the original rock is mainly felsic provenance, its formation may be acidic volcano matter through the handling of weathering, deposition, in the process of ancient sediments of the upper crust in different join; tectonic discrimination diagrams, the vast majority of sample projection point into the active continental margin area. The geochemical characteristics indicate that Yanwangdian group clastic rocks can be deposited in an active continental margin environment. Yanwangdian group from down to up, I The CV value is decreased, reflecting the weathering characteristics from weak to strong, compositional maturity gradually increased, weathering serious, according to the judgment of source area weathering characteristics of climate from the cold, dry, weak weathering to warm, moist, moderately weathered evolution. Through the formation of ore-forming elements Au, Ag, As, Sb, Pb Bi, Hg, Zn, Cu, analysis of the formation of ore-forming elements are relatively enriched, gold element enrichment coefficient reached 15.72, other elements are enrichment, Cu loss, can provide the material source for the favorable metallogenic area, as the ore source bed.

【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P536
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本文編號：1388564