| 桑华文.山西省代县高凡水系沉积物金异常及验证效果[J].地质找矿论丛,1988,(3):79-89 |
| 山西省代县高凡水系沉积物金异常及验证效果 |
| TEST AND VERIFICATION OF GAO FAN RIVER SEDIMENT AuANOMALY IN DAIXIAN COUATY, SHANXI PROVINCE |
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| DOI：10.6053/j.issn.1001-1412.1988.3. 009 |
| 中文关键词: 高凡 地球化学特征 构造蚀变岩型Au、Ag矿 |
| 英文关键词: |
| 基金项目: |
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| 摘要点击次数: 1208 |
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| 中文摘要: |
| 高凡Au异常受控于Nw向和NE向断裂构造交汇部位的特征,打破了前人局限于燕山期中酸性斑岩体内外接触带找Au—Ag矿的常规,为晋东北构造蚀变岩型Au—Ag矿的寻找提供了先例。另外,各种地球化学参数表明,高凡矿区Ag矿远景比Au矿更大。 |
| 英文摘要: |
| Gad Fan Au-anomaly is controled by the intersections of NW-trending fractures and NEtrending fractures. This makes a breakthrough in the prospecting of Jiaojiaa-type, i.e. fracturedaltered-rock type gold deposits in Shanxi province. Prior to this discovery, Au, Ag exploration is confined to the inner and. outer contact zone of intermediate-acidic porphyritic rock bodies. The NW-trending fractures controling the string-bead-distributed Au-anomaly (away from the rock body about 0.5—2 km) are conduits for transporting ore-forming fluid and the sub-fractures derived from them and the intersection of NW—trending and NE-trending fractures locate Au-ore deposits in spite of that the background area of high gold value is closely related to Tanshang intermediate-acidic subvolvanic comlex in their genesis. Ore-fluid were transported from SE-NW along fracture zone that leads to lateral elernennt zonation in Gan Fan Au-anomly which is caused by mineralization. Element zonation model is of certain represntation in norteast Shanxi province. Concentration limit value of Ag in the intermediate-acidic sub-volcanic rocks of Early, Middle and Late Yanshanian Stage is 9.5-717.9, much more than that of Au (0.23-2.76) indicating that Ag prospecting is more patential than Au in this area. Test and verification of Gad Fan Au-anomaly prove a medium-sized Au-deposit. And a Auanomoly in the south of Gad Fan anamoly is under test and verification now. |
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