...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nonlinear processes in geophysics >Singular value decomposition (SVD) for extraction of gravity anomaly associated with gold mineralization in Tongshi gold field, Western Shandong Uplifted Block, Eastern China
【24h】

Singular value decomposition (SVD) for extraction of gravity anomaly associated with gold mineralization in Tongshi gold field, Western Shandong Uplifted Block, Eastern China

机译：山东东部隆起块通石金矿区与金矿化有关的重力异常提取的奇异值分解（SVD）

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A singular value decomposition (SVD) program on MATLAB platform was effectively used to handle gravity signals for the Tongshi gold field. Firstly, the gravity signals were decomposed into different eigenimages with the help of singular value decomposition method (SVD). Secondly, the thresholds between the eigenvalues reflecting different layers of ore-controlling factors were established by multi-fractal method. Finally images reflecting different layers of ore-controlling factors were rebuilt. This yielded two layers of two-dimensional singular value images that depict regional and local ore-controlling factors, respectively. 1. The regional ore-controlling factor is a saddle valley with the gravity anomaly values varying from -55 to 51 μm s~(-2) on the NW trending swell with the gravity anomaly values varying from -55 to 567 μm s~(-2) on the SW side of the Mesozoic volcanic sedimentary basin with the gravity anomaly values varying from -56 to -974 μm s~(-2). The saddle valley might be tectonically an extensional area where the Tongshi complex pluton and all gold deposits are located and thus this area is favorable for gold deposits. 2. The local ore-controlling factor is the Tongshi complex pluton with a negative circular gravity anomaly varying from -339 to -11 μm s~(-2) and the ring contact metasomatic mineralization zone around the Tongshi complex with the positive gravity anomaly varying from 37 to 345 μm s~(-2). The skarn and porphyry types of gold deposits are located within the complex pluton and the Carlin and cryptobreccia types of gold deposits are located within the contact metasomatic mineralization zone. Thus both of them are potential areas for gold deposits. 3. The Tongshi gold field exhibits a typical complexity with multi-layers of ore-controlling factors.
机译：MATLAB平台上的奇异值分解（SVD）程序有效地用于处理通石金矿田的重力信号。首先，借助奇异值分解方法（SVD）将重力信号分解为不同的特征图像。其次，利用多重分形方法建立了反映不同控矿因素层的特征值之间的阈值。最后，重建了反映不同层控矿因素的图像。这样就产生了两层二维奇异值图像，分别描绘了区域和局部矿石控制因素。 1.区域控矿因素是一个鞍谷，重力趋势值在-55至567μms〜（-）范围内在西北趋势隆起处的重力异常值在-55至51μms〜（-2）之间变化。 -2）在中生代火山沉积盆地西南侧，重力异常值在-56至-974μms〜（-2）之间变化。马鞍谷在构造上可能是通石复杂岩体和所有金矿床所在的延伸区域，因此该区域对金矿床有利。 2.局部控矿因素为负圆形重力异常范围为-339至-11μms〜（-2）的桐石复合岩体，且正重力异常变化为桐石复合体周围的环接触交代成矿带。从37至345μms〜（-2）。矽卡岩型和斑岩型金矿床位于复杂岩体内，卡林和隐角砾岩型金矿床位于接触交代交代矿化区内。因此，它们都是金矿的潜在领域。 3.铜石金矿场具有典型的复杂性，其中包含多个控矿因素。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号