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Objective Igneous intrusion into coal-bearing strata can cause an abrupt increase of temperature-pressure and trigger hydrothermal circulation at the igneous rock-coal contact zone.The conductive heat of intruded magma and convective migration of secondary hydrothermal fluids have been observed to significantly alter the
Objective Igneous intrusion into coal-bearing strata can cause an abrupt increase of temperature-pressure and trigger hydrothermal circulation at the igneous rock-coal contact zone. The conductive heat of intruded magma and convective migration of secondary hydrothermal fluids have been observed significantly changed the