甘肃小铁山隐伏多金属矿床地球化学预测指标
刘崇民1 ,马生明1 ,朱立新2 ,梁胜跃1 ,李冰1
1.中国地质科学院 地球物理地球化学勘查研究所,河北 廊坊 065000; 2.中国地质科学院,北京 100037
GEOCHEMICAL PROGNOSTIC INDICATORS FOR THE XIAOTIESHAN CONCEALEDPOLYMETALLIC DEPOSIT IN GANSU PROVINCE
LIU Chongmin 1 ,MA Shengming 1 ,ZHU Lixin 2 ,LIANG Shengyue 1 ,LI Bing 1
1.Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China; 2.
Chinese Academy of Geological Sciences, Beijing 100037, China
摘要 小铁山隐伏多金属矿床是海底火山喷发—沉积建造成因的矿床。赋矿地层、岩性具有较高含量的CuZnBaAgCo组合。在矿田和矿床范
围内,这些元素形成清晰的原生异常,异常相互交替叠置于矿化地段。在矿体延伸方向上,元素的原生异常分布组合具有轴向分带现象,前缘元素I
、Na2O、Li,与矿体密切相关元素为Cu、Zn,Hg、Au、Pb、Ag、Bi、Sb、As,尾部元素Cd、Mo、Co、Sn。多元素累乘比值[w(Na2O)×w(Li)]/
[w(K2O)×w(Rb)]从矿上向尾部具有规律的下降,矿体上、下盘的元素组合明显不同,矿体上盘富集亲铁元素,矿体下盘富集亲硫元素。这些
指标对评价异常远景和矿化剥蚀程度具有一定的意义。
Abstract :The Xiaotieshan concealed polymetallic deposit is genetically a submarine volcanic eruptive-sedimentary deposit. Its
orehosting strata contain fairly abundant Cu, Zn, Ba, Ag and Co. Within the ore field and the ore deposit, these elements form
distinct primary anomalies, which are superimposed on the mineralization sector. In the extending direction of the ore body, the
distribution and association of the primary anomalies assume axial zoning, with the frontal elements being I, Na2O, Li, the
elements closely associated with the ore body being Cu, Zn, Hg, Au, Pb, Ag, Bi, Sb, As, and the rear elements being Cd, Mo, Co,
Sn. From the upper part of the ore body to the rear part,[(w(Na2O)×w(Li)]/[w(K2O)×w(Rb)] decreases regularly. The
element association in the hanging wall is obviously different from that in the lying wall: the hanging wall is enriched with
siderophile elements, while the lying wall has abundant thiophile elements. These indicators are surely of some significance in
the evaluation of anomaly prospects and mineralization-denudation extent.
收稿日期: 2008-11-03
出版日期: 2009-12-10
基金资助: 国土资源部公益性行业科研专项(200811054)
通讯作者:
刘崇民 (1955-),男,陕西商州人。硕士,教授级高级工程师。长期从事矿床地球化学勘查研究,在国内外发表论文30余篇,合著专著两部。
引用本文:
刘崇民, 马生明, 朱立新, 梁胜跃, 李冰. 甘肃小铁山隐伏多金属矿床地球化学预测指标[J]. 物探与化探, 2009, 33(6): 646-651.
LIU Chong-Min, MA Sheng-Ming, ZHU Li-Xin, LIANG Sheng-Yue, LI Bing. GEOCHEMICAL PROGNOSTIC INDICATORS FOR THE XIAOTIESHAN CONCEALEDPOLYMETALLIC DEPOSIT IN GANSU PROVINCE. Geophysical and Geochemical Exploration, 2009, 33(6): 646-651.
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