| slabstone is good at split performance and it must reaches a certain degree ofthelumpiness and quality, Which is widely used as a roof covering is called roofing slate ore.roofing slate resources in China is relatively rich, and it is the most famous in ZiYangcounty. Nowadays, roofing slate had a good market both at home and abroad, to strengthenthe research of metallogenic mechanismand occurrence regularity is imperative, and it Hasimportant practical significance and economic and academic value.roofing slate ore deposit of Heping. ziyang is located in the ziyang-PingLi thrust nappebelt in thrust nappe system of south qinling, it belongs to the ziyang-PingLi strata area.this test accomplished based on the roofing slate survey projects at2010-2012in hepingarea. ZiYang shaanxi province, investigating multiple roofing slate mining area in the region,focused on heping mining ore deposit geological characteristics and ore-controllinggeological conditions, drawing a conclusion of roofing slate ore formation is conditioned byseveral conditions, thus preliminarily expounds roofing slate ore deposit ore-controllinggeological conditions, exploring its mineralization vision and prospecting potential. Thistext’s main results are as follows:1. Expound the geotectonic attribution of ziyang district; Regional geological evolutionprocess; Tectonic activity in the area, mineral is rich. Within the mining area constructionmainly fault fold belt, exposed2reverse faults and2normal faults; Fold in the mine areclosed folds, outcropped near a fault, through directional samples, petrofabric analysis, σ1≈27°∠31°, in keeping with regional nappe tectonic features; Intrusive rocks are mainlyorthophyre in the diggings.2. Expound the output position,size and thickness of orebody. Find that K1and K2orebodies have a great affinity with fold:The orebody output in one flank or two flanks. it ismeans that Fold have certain control effect on the output of orebody;Through microscopicobservation: main mineral composition of the roofing slate made up of sericite (75~90%),quartz (8~15%), carbon (<1%), carbonate (<1%), chlorite(<1%), biotite (<1%) and pyrite,pyrrhotite (<1%) and trace amounts of tourmaline, etc. Ore with a planar structure,microscopic scales blastic texture; Through the analysis of the chemical properties of ore, physical properties, roofing slate in the area all the indexes accord with domestic andEuropean quality standards. roofing slate ore of heping not only roofing the housetop alsocan be used for the carve sculpturesof public, it has good economic value.3. The main factors analyzed the controlling effects of roofing slate in regionalmetamorphism, stratum lithology, structure and magmatic rocks.①the roofing slate has lower metamorphic grade, it is belongs to the slate stageproduct of metamorphism. Metamorphism of the slate not only controls the distribution andcharacteristics of metamorphic facies belt, also controls the SLATE of mineral composition,physical and chemical properties,process performance and mineralization characteristics.Metamorphic degree is higher or lower are detrimental to formation the roofing slate.②the protolith of the slate is a thick layer siltite, its composition and texture areuniformity, there is obvious stratabound characteristics. The stratum of orebody outputtingis in the second layer of Lower Silurian, but not all layer can be used as orebody, rockmineral content is different in different lithology layer, proportion of certain mineralscontent on physical and chemical properties of slate has certain influence. Only whenappropriate proportion of mineral content, mineral can have good processing conditions,the physical and chemical properties, IT would be the roofing slate ore in conformity withexport standards and industrial exploitation value.③the author be the first discuss the controlling from the perspective of zone ofbruchfalten. its controlling is more directly, and its mainly controls the output parts and theform of roofing slate ore. The intersection angle between slaty cleavage (axial planecleavage) and bedding plane is smaller in the wings of fold, the closer to the point end partit would be larger, even right-angle. only the plate anglebetween slaty cleavage andbedding plane is less than20°, can output roofing slate ore, so the orebody occurence inthe wings of fold. it can be output in homoclinal fold flanks, and orebody can be output inone of flanks in generally overturned fold. Because of zone of bruchfalten, the hinges offolds are always slow wave, So the intersection angle between slaty cleavage (axial planecleavage) and bedding plane is changed, and make the ore body of discontinuity, be manylenticulas. pitching Angle change of the fold. Fault fold belt tectonic. zone of bruchfalten has an important role in controlling the position and the continuity of the orebodies.④The intersection angle between joint surface and slaty cleavage are vertically, andthe Joint spacing is greater than the rough stone block of roofing slate, it has a certain limitto blocks of orebodies when mining. yhere is not a great influence to the pruduct; Implicitjoints in rock are mass weathering, they are destroy the integrity of slate and reduce theyield.⑤simple siltstone is difficult to form rich SiO2, early magmatic activity provide largeamounts of mineral composition for slate, at the same time, also provides a rich SiO2forslate, they laid the material foundation for roofing slate when original sedimentary rockformation. Early magmatic activity on slate of geometrical shape and influence on productquality, it is one of the factors to mineralization of controlling roofing slate. Late magmaticactivity has a great influence for the preservation and The quality of roofing slate.there are many stringent restrictions for the mineralization of roofing slate ore. Theposition and scale are severely limited for the roofing slate. Therefore, strengthen theore-controlling condition of the research on peripheral prospecting and mining in the regionhas an important guiding significance to the development and utilization.. |
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