物探与化探
物探與化探
물탐여화탐
GEOPHYSICAL AND GEOCHEMICAL EXPLORATION
2009年
6期
646-651
,共6页
刘崇民%马生明%朱立新%梁胜跃%李冰
劉崇民%馬生明%硃立新%樑勝躍%李冰
류숭민%마생명%주립신%량성약%리빙
多金属矿床%地球化学元素组合%预测判别指标%小铁山隐伏多金属矿
多金屬礦床%地毬化學元素組閤%預測判彆指標%小鐵山隱伏多金屬礦
다금속광상%지구화학원소조합%예측판별지표%소철산은복다금속광
polymetallic deposit%geochemical element association%prognostic and discrimination indices%Xiaotieshan polymetallic deposit
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Cu-Zn-Ba-Ag-Co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、Na_2O、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(Na_2O)×w(Li)]/[w(K_2O)×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.
小鐵山隱伏多金屬礦床是海底火山噴髮-沉積建造成因的礦床.賦礦地層、巖性具有較高含量的Cu-Zn-Ba-Ag-Co組閤.在礦田和礦床範圍內,這些元素形成清晰的原生異常,異常相互交替疊置于礦化地段.在礦體延伸方嚮上,元素的原生異常分佈組閤具有軸嚮分帶現象,前緣元素I、Na_2O、Li,與礦體密切相關元素為Cu、Zn,Hg、Au、Pb、Ag、Bi、Sb、As,尾部元素Cd、Mo、Co、Sn.多元素纍乘比值[w(Na_2O)×w(Li)]/[w(K_2O)×w(Rb)]從礦上嚮尾部具有規律的下降,礦體上、下盤的元素組閤明顯不同,礦體上盤富集親鐵元素,礦體下盤富集親硫元素.這些指標對評價異常遠景和礦化剝蝕程度具有一定的意義.
소철산은복다금속광상시해저화산분발-침적건조성인적광상.부광지층、암성구유교고함량적Cu-Zn-Ba-Ag-Co조합.재광전화광상범위내,저사원소형성청석적원생이상,이상상호교체첩치우광화지단.재광체연신방향상,원소적원생이상분포조합구유축향분대현상,전연원소I、Na_2O、Li,여광체밀절상관원소위Cu、Zn,Hg、Au、Pb、Ag、Bi、Sb、As,미부원소Cd、Mo、Co、Sn.다원소루승비치[w(Na_2O)×w(Li)]/[w(K_2O)×w(Rb)]종광상향미부구유규률적하강,광체상、하반적원소조합명현불동,광체상반부집친철원소,광체하반부집친류원소.저사지표대평개이상원경화광화박식정도구유일정적의의.
The Xiaotieshan concealed polymetallic deposit is genetically a submarine volcanic eruptive-sedimentary deposit. Its ore-hosting 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, Na_2O, 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(Na_2O)×w(Li)]/[w(K_2O)×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.