【摘要】：江西景德鎮(zhèn)朱溪鎢銅礦床是近年來發(fā)現(xiàn)的一個世界級超大型鎢銅礦床,隸屬塔前-賦春多金屬成礦帶。先前的研究者對該礦床的地質(zhì)特征、控礦構(gòu)造特征及找礦方向進行了探討,對礦床的地球化學(xué)、礦物學(xué)、同位素年代學(xué)等方面也進行了相關(guān)研究,成果頗豐。但是,由于成礦母巖體的多期次,成礦作用的多樣性,銅鎢礦化的差異性,導(dǎo)致對礦床成礦階段及礦床成因方面的認識仍有爭議,主要因為在巖漿與成礦的關(guān)系、成礦作用的類型與特點等方面的研究較為薄弱。隨著勘查工作的深入,一些與成礦相關(guān)的地質(zhì)體以及深部礦化現(xiàn)象不斷被揭示,這為進一步完善對礦床成因的深入認識提供了重要基礎(chǔ)�；谶@一背景,對該礦床開展成礦作用特征的研究,既有深化成礦理論研究意義,又有指導(dǎo)下一步找礦的意義,因此筆者選擇“贛東北朱溪鎢銅礦床地質(zhì)特征及成因探討”為題進行專題研究。本文取得的主要研究成果如下:(1)礦體位于上石炭統(tǒng)黃龍組(C2h)大理巖與新元古代雙橋山群(Pt3sh)變質(zhì)巖之間的不整合界面之間。巖體-礦體-圍巖在空間上具有顯著的礦物組合分帶特征。(2)根據(jù)矽卡巖礦物電子探針分析認為,石榴子石主要為鈣鋁榴石-鈣鐵榴石系列;輝石為透輝石-鈣鐵輝石系列,具典型鈣矽卡巖特征。矽卡巖期可劃分為4個階段:矽卡巖階段、退化蝕變階段、石英-硫化物階段、碳酸鹽階段。(3)碳、氫、氧、硫、鉛同位素分析顯示:碳的來源具有巖漿活動的特點,又受矽卡巖化交代作用影響而帶有圍巖地層的特征;氫-氧同位素組成具有巖漿水和大氣降水混合的特點;硫的來源具有典型“巖漿硫”的特點,成礦時的熱液體系顯示為穩(wěn)定平衡的狀態(tài);鉛的來源主要為殼源。(4)通過對礦床地質(zhì)特征的系統(tǒng)研究,認為鎢礦化至少存在三期(145Ma左右為鎢的主成礦時期),銅礦化至少存在兩期(159Ma左右為銅的主成礦時期)。朱溪鎢銅礦床的形成與多種成礦作用類型密切相關(guān):以矽卡巖型、云英巖型、熱液型為主,巖漿型為輔。銅礦的形成以熱液脈型為主,矽卡巖型為次。(5)建立了朱溪鎢銅礦床的成礦模式:朱溪鎢銅礦床受多種構(gòu)造作用控制,與多期次的巖漿-流體侵位相關(guān),成礦物質(zhì)和成礦流體的來源具有多樣性,由多種成因的類型的成礦作用疊加而形成。
[Abstract]:The Zhuxi tungsten copper deposit in Jingdezhen, Jiangxi Province, is a world-class super large tungsten copper deposit discovered in recent years, which belongs to the Ta-Qian-Fu Chun polymetallic metallogenic belt. Previous researchers have discussed the geological characteristics, ore-controlling structural characteristics and prospecting direction of the deposit, and studied the geochemistry, mineralogy and isotopic chronology of the deposit. However, due to the multiple stages of ore-forming parent rock, the diversity of mineralization and the difference of copper and tungsten mineralization, there is still controversy about the metallogenic stage and genesis of the deposit, mainly because of the relationship between magma and mineralization. The study on the types and characteristics of mineralization is relatively weak. With the development of exploration, some ore-forming related geological bodies and deep mineralization phenomena have been revealed, which provides an important basis for further improving the understanding of ore deposit genesis. Based on this background, the study on the metallogenic characteristics of the ore deposit is of great significance both in deepening the study of metallogenic theory and in guiding the further exploration of ore deposits. Therefore, the author chooses "Geological characteristics and Genesis of Zhuxi Tungsten and Copper Deposit in Northeast Jiangxi Province" as a special topic. The main results obtained in this paper are as follows: (1) the orebody is located between the unconformable interface between the upper Carboniferous Huanglong formation (C2h) marble and the Neoproterozoic Shuangqiao Mountain Group (Pt3sh) metamorphic rocks. According to the electron probe analysis of skarn minerals, the pomegranate is mainly composed of calcium aluminite and calcium ferrite; Pyroxene is a series of diopside-Calciferopyroxene with typical calcium skarn characteristics. The skarn stage can be divided into four stages: skarn stage, degenerative alteration stage, quartz-sulfide stage, carbonate stage. (3) isotopic analysis of carbon, hydrogen, oxygen, sulfur and lead shows that the source of carbon is characterized by magmatic activity. Influenced by skarn metasomatism, it has the characteristics of surrounding rock strata. The hydrogen-oxygen isotopic composition has the characteristics of mixing magmatic water and atmospheric precipitation, the source of sulfur has the characteristic of typical "magmatic sulfur", and the hydrothermal system during mineralization shows a stable equilibrium state. (4) based on the systematic study of the geological characteristics of the deposit, it is concluded that there are at least three stages of tungsten mineralization (145Ma is the main metallogenic period of tungsten) and at least two periods of copper mineralization (159Ma is the main metallogenic period of copper). The formation of Zhuxi tungsten copper deposit is closely related to many types of mineralization: skarn type, quartz type, hydrothermal type and magmatic type. The formation of copper deposit is mainly hydrothermal vein type, and skarn type is secondary. (5) the metallogenic model of Zhuxi tungsten copper deposit is established. The deposit is controlled by various tectonic processes and is related to multiple magmatic fluid emplacement. The sources of ore-forming minerals and ore-forming fluids are diverse and are formed by the superposition of various genetic types of mineralization.
【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】：P618.41;P618.67

【相似文獻】

相關(guān)期刊論文 前10條

1 ;青海賽什塘銅礦開工建設(shè)[J];國外金屬礦選礦;2001年06期

2 ;青海賽什塘銅礦開工建設(shè)[J];有色礦山;2001年05期

3 ;中國銅礦開發(fā)開始重大戰(zhàn)略西移[J];探礦工程(巖土鉆掘工程);2010年10期

4 唐俊華;長江中下游地區(qū)層狀銅礦床基本特征及成因[J];礦產(chǎn)與地質(zhì);2000年02期

5 薛步高;史料考證與找礦(之三):銅礦[J];云南地質(zhì);2002年03期

6 劉揚;世界上第二例大規(guī)模自然銅礦在我國被發(fā)現(xiàn)[J];有色設(shè)備;2002年05期

7 沈存利,蘇宏偉,王守光;內(nèi)蒙古銅礦床區(qū)域成礦特征初步研究[J];西北地質(zhì);2004年03期

8 崔銀亮,秦德先,陳耀光,毛云忠;中國云南金平龍脖河銅礦與越南生權(quán)銅礦初步對比研究[J];地質(zhì)與勘探;2004年06期

9 崔銀亮;秦德先;高俊;楊學(xué)善;陳耀光;;云南金平龍脖河銅礦床與新平大紅山鐵銅礦床對比研究[J];中國工程科學(xué);2005年S1期

10 楊林;田曉燕;唐鳳英;杜鵑;;內(nèi)蒙古銅礦時空分布淺析[J];內(nèi)蒙古科技與經(jīng)濟;2005年23期

相關(guān)會議論文 前10條

1 孫海田;韓發(fā);葛朝華;;我國銅礦床主要類型及找礦方向初探[A];中國地質(zhì)科學(xué)院文集（25）[C];1992年

2 宋學(xué)信;;筏子壩銅礦床(體)快速定位預(yù)測的綜合示范研究[A];中國地質(zhì)科學(xué)院“九五”科技成果匯編[C];2001年

3 徐文p，

本文編號：2385176