MEASUREMENT AND RESEARCH METHOD OF METALLOGENIC DEPTHS OF JIAOJIA OREFIELD AND LINGLONG OREFIELD, SHANDONG PROVINCE, CHINA

Taking the contribution of the tectonic force to the total hydrostatic pressure into account, the author puts forward a new method on the ca lculation of the depth of petrogenesis and metallogenesis which is sum marized as follows: first the tectonic added hydrostatic pressured P-s is subtracted from the total hydrostatic pressure P, then using their difference P-r, according to the general method the depth of petrogen esis and metallogenesis can be determined in consideration of lateral constraint. By the new method the following data on the depths of the metallogenesis are obtained: 2 243.6 m (No. I ana No. II veins with me tallogenic epoch of 105 Ma) and 1 632.38 m (No. III vein with 105 Ma) for Jiaojia orefield, and 3 454.97 m (NE-trending zone with 213.2 Ma), 1 902.79 m (ENE-trending zone with 100.28 Ma), 1 090.97 m (NE-trendin g zone with 80.67 Ma) and 720.55 m (NNE-trending zone with 71.86 Ma) f or Linglong orefield.