金伯利岩管三维构造模型找矿新方法

A new method of 3D structural model for prospecting kimberlite pipe

研究山东省西峪金伯利岩管产状特征与深部成矿潜力,探索金伯利岩管深部找矿的新方法。将三维构造模型定量分析作为金伯利岩管深部找矿的研究内容,定量分析与解释金伯利岩管的形成机制。结果表明金伯利岩的岩浆上涌通道位置可以借助主干构造、构造密度、构造交点等三维定量分析得到准确判断;而断裂构造频数、构造方位异常等特征的定量分析,是对岩管在空间上“上大下小,分支复合”的形态差异加以解释;圈定岩管2处深部成矿有利区。断裂构造与金伯利岩管在产状与成因方面具有相似性与关联性,三维构造模型定量分析是解析岩管产状特征的有效途径,金伯利岩管深部具有一定找矿潜力。

The deep metallogenic potential of kimberlite pipe at Xiyu of Shandong Province is studied and the formation mechanism of kimberlite pipe is quantitatively analyzed and interpreted through 3D structural model analyses.It shows that the location of magma upwelling passage in kimberlite can be accurately determined by 3D quantitative analysis on main structures,structural density and structural intersection.The quantitative analysis of fault structure frequency and structural azimuth anomaly is used to interpret the morphological difference of the rock pipes in space.Two deep ore-forming areas have been delineated through the 3D quantitative analysis.The fault structures are similar to and related to the occurrence and genesis of kimberlite pipe.It proves that the quantitative analysis of 3D structural model is an effective way to analyze the occurrence characteristics of kimberlite pipe.