Abstract
The granite-porphyry mass in this district consists of tour rock types, namely, hornblende-biotite-granite-porphyry, leucocratic granite-porphyry, coarse-grained granite-porphyry, and aplitic granite-porphyry., The hornblende-biotite-granite-porphyry which distributes most widely with a leucocratic marginal facies, is cataclastic and foliated., The flow planes are parallel to the contact planes and conform to a large anticlinal structure with NE-SW axis., It metamorphoses the Palaeozoic stratum and hornblende-porphyrite dikes with which it is in contact to strongly schistose rocks and forms a peculiar breccia zone in that area., From these evidences it is considered that the body of the hornblende-biotite-granite-porphyry and leucocratic granite-porphyry might have risen into place by upward flow of NW direction, of a partially crystallized magma., The coarse-grained granite-porphyry which is weakly foliated may be perhaps a succesive intrusive body., The aplitic granite-porphyry which is massive may be considered a later sheet-like body.,
