Under the theory of regional metallogenic system, this paper, focusing on Gaize district in Tibet, conducted carefully research in geological structure, magma activity, geophysical anomaly, geochemical anomaly, gold-bearing geological bodies and gold occurrence state, association of gold with other related elements, characteristics of typical deposits, metallogenic age, metallogenic process, post-ore-forming destruction of deposits in Gaize district based on methods of geology, petrology, economic geology, genetic mineralogy, isotopic chronology, geophysical and geochemical prospecting, and remote sensing.

本論文以藏北改則地區(qū)為重點(diǎn)研究區(qū)免费黄图视频A片，以區(qū)域成礦系統(tǒng)理論為指導(dǎo)久久精品官网，采用地質(zhì)學(xué)、巖石學(xué)欧美肏、礦床學(xué)超碰在线免费网址、成因礦物學(xué)、同位素年代學(xué)以及物天天操操操、化曰本啪啪啪网址、遙相結(jié)合的方法，對(duì)改則地區(qū)的地質(zhì)構(gòu)造人妻少妇视频一区中文字幕、巖漿活動(dòng)一级黄色网站A片、物化遙異常、各地質(zhì)體的含金性及金的賦存狀態(tài)在线观看中文字幕2022、金與相關(guān)元素的組合特征免费看黄色三级网站、典型礦床特征、成礦時(shí)代欧美天天搞网站、成礦過(guò)程及礦床形成后的破壞作用等進(jìn)行了較詳細(xì)的研究一级毛片视频在线看。

According to a couple of international seminars attended by the author of this paper and his on-the-spot investigation of alluvial gold fields at Yukon District of Canada in the year of 1989, an analysis and summary of the mining art and ore dressing of alluvial gold in Canada were made by the author himself.

根據(jù)1989年在國(guó)外期間參加的兩次研討會(huì)，以及對(duì)育空地區(qū)砂金產(chǎn)地的現(xiàn)場(chǎng)考察ww黄色，歸納分析了加拿大砂金采選技術(shù)95午夜电影。200多座家庭式生產(chǎn)經(jīng)營(yíng)的中、小礦山大BBBB高潮，構(gòu)成育空地區(qū)和全加拿大砂金產(chǎn)量的大部分999视频在线观看。

In this paper, the petrology, mineralogy and geochemistry of basic-ultrabasic volcanic rock, granite and skarn related to the Sn-Cu skarn-type ore and the vein-type ore in Laochang ore field have been researched systematically, some conclusions are summarized as follows:In Gejiu tin-polymetallic district, the middle Triassic volcanic rocks belonging to calc-alkaline basalt-tholeiite serie, mainly consist of pyroxene, hornblende, feldspar, chlorite and phlogopite; All the granites are peraluminous granites related to the Yanshanian collision-orogeny. Laoka granite closely related to the tin-polymetallic deposits emplaced in the post- orogenic.The metal elements show obviously vertical zones with the variety of skarn types in dimensional extension; The occurrence of garnet skarn and diopside skarn alternately developed in the horizontal zones of the contact between granite and carbonatite are mainly related to two factors: one factor is the infiltration metasomatism of post-magmatic hydrothermal solution, the another is the metrical strata of marble and calcic-dolomite developed in country rocks.

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Limonitization is the ore finding sign in the district. Gold ore bodies are hosted in gray - purple feldspar sandstone.

金礦體賦存在三疊系黃褐网友自拍日韩视频网站、灰紫色長(zhǎng)石砂巖中是我省金礦床類(lèi)型中較為少見(jiàn)的一種類(lèi)型99视频有精品你懂的。

The research on the ore fabric of the main copper-iron deposits in the Tongling district indicates that there are sedimentary-diagenetic, thermal metamorphic and metasomatic ore fabric in this district.

通過(guò)對(duì)銅陵地區(qū)主要鐵銅礦床礦石組構(gòu)研究表明黄色视频污污，石炭系鐵銅礦床中存在沉積成巖、熱變質(zhì)及熱液充填免黄片视频在线观看、交代的礦石組構(gòu)免费久久精品国产片72。

There are three genetic types of mineral deposits in the Beiya ore district:① Cu-Au polymetallic deposits related to alkaline porphyries, comprising porphyritic Cu-Au deposits and polymetallic skarn deposits related to quartz-albite porphyry and quartz-K-feldspar porphyry;② Fe-Au deposits related to gabbro or basalt magma, consisting of magmatic Fe-Au deposits and sedimentary polymetallic deposits formed in caves and lakes; and ③ palaeo-placers formed at the weathering surface, in lakes and in karsts.

北衙金礦有3種成因不同的礦床：①與堿性斑巖有關(guān)的銅金多金屬礦，包括與石英鈉長(zhǎng)斑巖和石英正長(zhǎng)斑巖有關(guān)的斑巖型銅金礦床和矽卡巖型多金屬礦床国产36区；②與輝長(zhǎng)－玄武巖漿有關(guān)的鐵金礦床免费三级日欧美色性片，包括熔漿型鐵金礦床和噴流沉積型多金屬礦床，后者又有洞穴和湖相沉積環(huán)境之分男女男精品视频网在线观看；及③古砂礦国产精品群交电影在线免费观看，有古風(fēng)化殼型砂礦、河湖相古砂礦和洞穴沉積古砂礦日韩精品视频久久久免费观看。

The faults and the apophyses are main ore-control factors. Devonian and Carboniferous Systems are target horizons and Guwanliang-Tongtianping-Huanggeda fault is the target structure for further Au exploration in the district.

今后金礦勘查工作以泥盆系和石炭系為重點(diǎn)找金層位国产男女激情一区二区，古灣梁－通天坪－黃屹塔斷裂和印支期巖枝內(nèi)外接觸帶為重點(diǎn)勘查靶區(qū)。

According to the similarities between ore and porphyries about element associations in TUWU deposit district, we consider that they have a material relationship .

根據(jù)礦區(qū)的斑巖體與礦體在多種元素組合特征上的相似性判斷a级线手机免费观看，二者有物質(zhì)上的親緣關(guān)系一级A片全网免费观看。