| 从地洼学说谈浙江地区锡的找矿方向 |
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| 引用本文： | 黄瑞华.从地洼学说谈浙江地区锡的找矿方向[J].矿床地质,1988,7(2):65-72. |
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| 作者姓名： | 黄瑞华 |
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| 作者单位： | 中国科学院大地构造研究所 |
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| 摘 要： | 在大地构造上,浙江地区锡矿(化)主要形成于中、新生代以来的地洼阶段。以江山-绍兴深断裂为界,可以划分为浙东洼陷和浙西洼隆。从地质条件、矿床成因、岩石类型和物质组分等特征,将浙江锡矿(化)划分为斑岩型、矽卡岩型、云英岩型、锡石-石英脉型,锡石-石硫化物型和砂矿型六种类型。亲石型锡矿建造主要分布于陈蔡—龙泉地穹内;亲铁型和亲硫型锡矿建造主要分布于富阳—开化地洼陷带。从锡矿(化)受控于构造、沉积建造的特点,结合锡的赋存状态,提出乌岙—洋滨一带是浙江找锡最有利的部位。
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| 关 键 词： | 锡矿(化)类型 地洼学说 锡找矿方向 浙江地区 |
Directions of prospecting for tin deposits in Zhejiang region in the light of Diwa theory. |
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| Abstract: | On the basis of such data as metallogenic geological condition, geneses of ore deposits, rock types and material components, tin ore deposits(occurrences) in Zhejiang region are grouped into six types, i. e., porphyry type, skarn type, greisen type, cassiterite-sulfides type and placer. Geotectonically, tin ore deposits(occurrences) in this region were mainly formed in diwa stage from Mesozoic-Cenozoic. The clastic formation of geosynclinals type, the carbonate formation of platform type and the acidic volcanic formation of diwa stage are respectively favorable tectonic horizons for tin ore formations of lithophile type, skarn type tin deposits, and tin ore formations of porphyry or lithophile type. In tectonic unit, the tin ore formations of lithophile type are mainly distributed in Chencai-Longquan geodome, while the tin ore formations of siderophile type and sulphophile type occur mainly in Fuyang-Kaihua diwa subsidence zone. In infrastructure, the tin ore deposits (occurrences) are concentrated in plunging positions of basement uplift( western Zhejiang uplift) and the depths of basement depression( eastern Zhejiang depression). Tin ore deposits (occurrences) and tin-polymetallogenic factor areas in Zhejiang province all lie on the southwest side of the NW-trending Wenzhou-Jinhua-Jiande fault line, and this makes up another feature of tectonic distribution of tin. In view of the structural and formational control of the mode of occurrence of tin, the auther holds that Wuao-Yangbin area seems to be the most favorable area for the prospecting of tin deposits in Zhejiang province. |
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