Abstract
The paper discusses the relationship between the deep structural features and the distribution of ore-bearing kimberlites in the north China platform basically in Liaoning, Jilin and Shandong Provinces. The study was conducted by means of a comprehensive method based on integrated information, consisting of geological, geophysical and geochemical data on different scales.
Regional geological setting and structural features of the crystalline basement in the study area are described first. The paper then gives an explanation to show why it should be effective to simultaneously use geological, geophysical and geochemical data in kimberlite prospecting in this area and details of data processing and interpretation are given.
The paper especially deals with the minerogenic regularities and perspective prediction of diamond ores in the north China platform. Indicators for occurrence of kimberlite-type diamond ores are summarized as follows: 1. existence of Archean craton basement; 2. existence of great deep-seated faults and the associated buried faults; 3. well developed sedimentary overburden, generally as thick as several kilometers or more than ten kilometers; 4. uplift or slope segments of the Moho; 5. low geothermal flux.
Based on this study, major prospecting regions of primary diamond ores are proposed: 1. The Tanlu fault zone; 2. The Taihangshan fault zone; 3. The north edge of the north China platform.
