中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2014年
9期
2938-2945
,共8页
矿床地质%硫同位素%硫源%大厂锡矿
礦床地質%硫同位素%硫源%大廠錫礦
광상지질%류동위소%류원%대엄석광
deposit geology%sulfur isotope%sulfur sources%Dachang tin deposit
对大厂矿田进行详细地质调查并对铜坑和大幅楼矿床进行系统观察与研究，结果表明：长坡矿床主要由裂隙脉型、细脉型、似层状、细脉－网脉浸染状等矿化类型组成。裂隙脉型矿化在垂向上通常呈透镜状，细脉型矿化具有稳定的走向与倾向，似层状矿化一般沿地层中的断裂系统充填和交代变化；巴力－龙头山矿床矿物组分复杂、种类繁多。矿石结构以他形－半自形以及细粒为主，其次为填隙结构、固溶体分离结构、溶蚀结构、反应边结构以及压碎结构等；矿石构造包括块状、细脉状、浸染状、条带状、晶洞状、生物残余和角砾状等构造。同时，对金属硫化物的硫同位素进行分析，结果表明：铜坑矿床的硫同位素δ34S值较分散，介于-0.30%~1.38%之间；而大福楼矿床硫同位素δ34S值较集中，变化范围为-0.15%~0.22%，说明不同矿床的硫同位素组成存在较大的差异。大福楼矿床相对铜坑矿床而言，硫同位素组成具有更为集中的特点。同样，不同类型金属矿物的硫同位素组成也不同，磁黄铁矿的硫同位素较为分散，而黄铁矿的硫同位素组成更为均一。总体来看，硫同位素组成的差异既体现在矿床尺度上也表现于不同类型的矿物上，这可能受到矿床不同的硫来源影响。
對大廠礦田進行詳細地質調查併對銅坑和大幅樓礦床進行繫統觀察與研究，結果錶明：長坡礦床主要由裂隙脈型、細脈型、似層狀、細脈－網脈浸染狀等礦化類型組成。裂隙脈型礦化在垂嚮上通常呈透鏡狀，細脈型礦化具有穩定的走嚮與傾嚮，似層狀礦化一般沿地層中的斷裂繫統充填和交代變化；巴力－龍頭山礦床礦物組分複雜、種類繁多。礦石結構以他形－半自形以及細粒為主，其次為填隙結構、固溶體分離結構、溶蝕結構、反應邊結構以及壓碎結構等；礦石構造包括塊狀、細脈狀、浸染狀、條帶狀、晶洞狀、生物殘餘和角礫狀等構造。同時，對金屬硫化物的硫同位素進行分析，結果錶明：銅坑礦床的硫同位素δ34S值較分散，介于-0.30%~1.38%之間；而大福樓礦床硫同位素δ34S值較集中，變化範圍為-0.15%~0.22%，說明不同礦床的硫同位素組成存在較大的差異。大福樓礦床相對銅坑礦床而言，硫同位素組成具有更為集中的特點。同樣，不同類型金屬礦物的硫同位素組成也不同，磁黃鐵礦的硫同位素較為分散，而黃鐵礦的硫同位素組成更為均一。總體來看，硫同位素組成的差異既體現在礦床呎度上也錶現于不同類型的礦物上，這可能受到礦床不同的硫來源影響。
대대엄광전진행상세지질조사병대동갱화대폭루광상진행계통관찰여연구，결과표명：장파광상주요유렬극맥형、세맥형、사층상、세맥－망맥침염상등광화류형조성。렬극맥형광화재수향상통상정투경상，세맥형광화구유은정적주향여경향，사층상광화일반연지층중적단렬계통충전화교대변화；파력－룡두산광상광물조분복잡、충류번다。광석결구이타형－반자형이급세립위주，기차위전극결구、고용체분리결구、용식결구、반응변결구이급압쇄결구등；광석구조포괄괴상、세맥상、침염상、조대상、정동상、생물잔여화각력상등구조。동시，대금속류화물적류동위소진행분석，결과표명：동갱광상적류동위소δ34S치교분산，개우-0.30%~1.38%지간；이대복루광상류동위소δ34S치교집중，변화범위위-0.15%~0.22%，설명불동광상적류동위소조성존재교대적차이。대복루광상상대동갱광상이언，류동위소조성구유경위집중적특점。동양，불동류형금속광물적류동위소조성야불동，자황철광적류동위소교위분산，이황철광적류동위소조성경위균일。총체래간，류동위소조성적차이기체현재광상척도상야표현우불동류형적광물상，저가능수도광상불동적류래원영향。
The geological investigation of the Dachang ore field was carried out in detail, and the geological characteristics of the deposits, consisting of the Tongkeng and Dafulou deposits, were observed and researched systematically. It suggests that the mineralization types of Changpo ore are composed of cracking vein, thin vein, bedded vein and thin vein-net vein disseminated types. The cracking vein ore is usually lens-shaped in the vertical direction. The thin vein ore is always characterized by a stable trend and tendency. The bedded ore always occurs along the strata in the way of filling and metasomatism in the fracture system. In terms of Bali-longtoushan ore, it is characterized by complicated mineral components and a variety of minerals. More generally, ore textures consist of the anhedral-subhedral shapes and thin particle, and secondary with the interstitial texture, solid solution separation texture, dissolution texture, corona texture, and crushing texture, yet ore structures include the massive, veinlet, disseminated, banded, miarolitic, biological residual and brecciated structure. In addition, the sulfur isotopes of the metal sulfide were analyzed. The results show that theδ34S values of Tongkeng ore range from-0.30%to 1.38%with more dispersed characteristics, yet in terms of Dafulou ore, the δ34S values are from -0.15% to 0.22% which are characterized by more focused. This indicates that the sulfur isotope composition has large difference between the different deposits. The sulfur isotope values of the Dafulou ore are concentrated relatively, yet are dispersed for the Tongkeng ore. Likewise, there are also divergences of sulfur isotopes for the different minerals. The sulfur isotope values of pyrrhotine are dispersed, yet are homogeneous for pyrite. In short, the divergence of the sulfur isotope is reflected in both the different deposits and minerals, all of these may account for the difference of sulfur sources.
