| 完达山区旋卷构造与找矿意义 |
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| 引用本文： | 刘发文,梁树昌.完达山区旋卷构造与找矿意义[J].中国煤炭地质,2014(12):81-88. |
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| 作者姓名： | 刘发文 梁树昌 |
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| 作者单位： | 中国煤炭地质总局特种技术勘探中心;黑龙江省第一地质勘察院; |
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| 摘 要： | 完达山区旋卷构造位于黑龙江省东部,发育于完达山优地槽褶皱带内,构成饶河复背斜。该复背斜总体呈近南北向,略向西突出的弧形逆掩推覆于宝清过渡带。用旋卷构造＂三大特征＂对比,一系列弧形褶皱和断裂向北东方向收敛,向南东方向撒开,围绕以蛤蟆河岩体为中心旋扭,内旋面向撒开方向、外旋面向收敛方向旋扭,具压性—压扭性特征。这一旋卷构造是由富锦——小佳河断裂的剪切牵引为主、敦密深大断裂的左旋走滑剪切为辅的联合作用形成的。根据旋扭构造的发育情况大体划分了三个旋扭层。目前已知的铜金矿（点）床主要分布于各旋扭层的撒开段,但收敛段找矿潜力较大,其次为各旋扭层界面和向西弧形突出部位也具一定的找矿潜力。
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| 关 键 词： | 旋卷构造 弧形褶皱 逆掩推覆 走滑剪切 完达山 黑龙江省 |
Wandashan Vortex Structure and Its Prospecting Significance |
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| Institution: | Liu Fawen, Liang Shuchang (1. Special Technology Exploration Center, CNACG, Beijing 100040; 2. Heilongjiang Provincial First Geological Exploration Institute, Mudanjiang, Heilongjiang 157011) |
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| Abstract: | The Wandashan vortex structure is situated in eastern Heilongjiang, within the Wandashan eugeosyncline folded belt, and made up Raohe anticlinorium. The anticlinorium strike is near NS as a whole, slightly westward extrusive arc thrusting nappe overlying on the Baoqing transition zone. Compared with＂three major features＂of vortex structure, a series of arc-like folds and faults convergent northeastwardly and dispersed southeastwardly. Taking the Hamahe rock body as the center twisted, internal rotation face twists toward dispersed direction, outer rotation face twists toward convergent direction with compressive—compresso-shear characters. The vortex structure is formed by Fujin—Xiaojiahe fault shearing and traction, supplemented by Dunhua—Mishan discordogenic fault levorotatory strike-slip shearing. Based on the vortex structure development divided 3 twist layers in principle. Known copper-gold deposits（spots） mainly distributed on twist layer dispersed sectors, but convergent sectors have larger prospecting potential, then the interfaces of twist layers and westward extrusive arc position. |
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| Keywords: | vortex structure arc-like fold thrusting nappe strike-slip shearing Wandashan Heilongjiang Province |
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