CAJ | 학술논문

核桃坪铅锌矿床产于滇西保山古生代地块内，是近年来在西南“三江”地区勘查发现的大型铅锌（铜银）多金属矿床，也是该区为数不多的以断控脉状矽卡岩赋矿为特征的矿床。详细研究了区内铅锌矿体的各种赋矿围岩、蚀变（脉）体及矿石的稀土元素地球化学特征，结果表明：围岩的稀土元素主要富集在粘土矿物中，上侵的矽卡岩流体萃取了围岩中的稀土元素，并使自身稀土元素组成发生改变；当前揭露浅部矽卡岩的成岩流体为中-低温、酸-弱酸性流体，其酸度随流体演化而不断增加。认为核桃坪铅锌矿床可能是一个远端矽卡岩型矿床，矽卡岩及伴生铅锌（铜银）的成岩成矿作用均受控制于隐伏的岩浆-热液系统。
핵도평연자광상산우전서보산고생대지괴내，시근년래재서남“삼강”지구감사발현적대형연자（동은）다금속광상，야시해구위수불다적이단공맥상석잡암부광위특정적광상。상세연구료구내연자광체적각충부광위암、식변（맥）체급광석적희토원소지구화학특정，결과표명：위암적희토원소주요부집재점토광물중，상침적석잡암류체췌취료위암중적희토원소，병사자신희토원소조성발생개변；당전게로천부석잡암적성암류체위중-저온、산-약산성류체，기산도수류체연화이불단증가。인위핵도평연자광상가능시일개원단석잡암형광상，석잡암급반생연자（동은）적성암성광작용균수공제우은복적암장-열액계통。
The Hetaoping Pb-Zn deposit of Baoshan County is located in western Yunnan Province.It is one of large-scale lead-zinc(copper-silver)polymetallic deposits characterized of vein skarn-type ore-bearing deposits and controlled by fractures in Three River area of Yunnan Province,southwestern China.The authors systemati-cally studied rare earth element (REE )geochemical characteristics of the surrounding rocks,Pb-Zn ores and hydrothermal veins of Hetaoping Pb-Zn ore fields.The results show that REE in the surrounding rocks is mainly enriched in clay minerals.The skarn fluids extract the REE in the surrounding rocks and change their REE chondrite-normalized patterns.For now,exploration revealed shallow skarn diagenetic fluid is in medium-low temperature and acid-weak acid fluid,with the fluid evolutionary,the acidity of the fluid increases.Combined with the previous researching results,it is considered that the Hetaoping Pb-Zn deposit is a distal skarn-type Pb-Zn deposit and the rock-and ore-formations of the skarm and lead-zine (copper-silver)controlled by magmatic hydrothermal.