Geological Characteristics Of The Bazhai Volcanic Breccia Tube In Maguan, Yunnan Province

There is a wide distribution of volcanic breccia tube in Bazhai,Maguan of Yunnan province,among which the output of gem grade garnet rock ore can be used as gem.This paper is a study of the production characteristics,rock and mineralogy characteristics,the geochemical features,and the bedrock background of the volcanic breccia of the Maguan,and the study of the rocks of the breccia and the rock formation of the volcanic breccia is discussed,and the following:1.Volcanic breccia tube of Maguan Bazhai area in the study area is not found obvious volcano eruption traces on the surface of the earth,the earth's surface is exposed 6 volcanic breccia,should belong to the volcanic facies,the study area the contact relationship of surrounding rock.2.The breccia is included in volcanic breccia tube of Maguan Bazhai area is complex,consisting mainly of peridotite inclusions of volcanic components,monzonitic granite,garnet stone,pyroxene,olivine crystal clasp,and surrounding rock composition of feldspar quartz sandstone,mudstone,shale and carbonate breccia.The cementitious material is mainly basaltic,which can be named as the sinter volcanic breccia.3.The basalt in the volcanic breccia is the continental basalt,and the Mg# and SI values are close to the original magma,which should be the product of deep mantle magma.The two long granites in the rock tube are similar to the granite series in the dragon area,which may be the late yanshanian granite.4.The genesis model of volcanic breccia is proposed:Affected by the Himalayan movement in the study area,the relatively deep original mantle-derived basic basaltic magma up,carrying the mantle source from deep garnet,pyroxene,peridot crystal migration to the relatively shallow mantle captured the upper mantle pieces mantle peridotite inclusions,continue to rise,on the way up through the granite dike area around and carbonate rocks,sandstone,mudstone and shale formation region,appear cryptoexplosive phenomenon broken surrounding rock,granite,carbonate rock,sandstone,mudstone and shale fragments,upward migration of magma and filling,formation exposed volcanic breccia in the study area.