| 杨兆才.河北银矿床的成因类型及富集规律[J].地质找矿论丛,1990,(4):15-29 |
| 河北银矿床的成因类型及富集规律 |
| Ag-CONCENTRATION PATTERNS OF SILVER ORE DEPOSITS AND THEIR GENETIC CLASSIFICATION IN HEBEI PROVINCE |
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| DOI：10.6053/j.issn.1001-1412.1990.4. 002 |
| 中文关键词: 华北地台北缘 银矿床 浅成低温 变质改造 富集规律 |
| 英文关键词: |
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| 中文摘要: |
| 近几年来河北省尤其是冀北地区银矿找矿与研究取得了丰硕成果。本文将银矿床类型初步划分为两类十一型,其中浅成低温热液型一变质岩浆热液叠加改造型与陆相(次)火山岩型最重要。通过对矿床成矿地质特征、时空分布特点及银的赋存状态的讨论阐述了河北银的一般富集规律。 |
| 英文摘要: |
| There are many types of silver ore deposit in Hebei province,but metamorphic-magmatic hydrothermal-reworked silver deposits,epithermal silver deposits and continental volcanic silver deposits are dominated,To the less extent is hydrothermal filling vein-typed silver deposit, Chemically they are divided into silver-dominant deposits and Pb-Zn-dominant deposit.Metamorphic,magmatic hydrothermal reworked silver depsoits are controled by Datongying Formation of Hongqi Yingzi Group of archean strata but also characterized by marks of magmatic overprints and reworks、Epithermal silver ore deposits occur in the fractural zones developed in granite bodies.Compared to the same type silver deposits in China they are unique in their geological features. Mesozoic,espeeialy the end period of it is the main ore-forming period.To the less exten is the early period of the late Archean.Metallogenic belts are controled by deep fraetural zone and the related magmatism or by large-scaled folds.Silver occur mainly as micro-submicroinclusions of native silver,sulfides,double sulphursalt,minerals of Au-Ag series and haloids in base metal ssulfides and iron sulfides.Pb,Zn,Au,Cu and Mn are the main associated elements.Silver ore is related to the silicificationdomonated intermadiate-low hydrothermal alteration.In the oxidation zone-developed-Ag-deposits Ag is concentrated about contact between the primary and the oxidation zones hut the concentration is not strong. |
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