The Ore-controlling Structure Characteristics And Its Controlling Effect On Gold,Nickel And Iron Ore In Jianchaling

The prosprcting area is located in Mian-lve-yang triangle area in easthern Motianlin Block between qinling orogenic zone and Yangtze Landmass,and Gold deposit of Jianchaling has the close relation with ultrabasic rock in this area. Jianchaling gathered many kinds of minerals, such as gold minerals, nickel minerals, iron minerals. Therefore, the research of the ore-controlling characteristics in Jianchaling gold,nickel and iron ore field has great theoretical and practical significance.Using structural analysis methods, based on the theory of regional tectonic rule, structural geology, structural petrology, the mineral deposit geology and other subjects, structure characteristics and evolution regularity of ore field, ore-controlling structure characteristics, ore-controlling structure are studied systematically, and then discuss how to find other minerals. The main achievements and conclusions of this paper are as follows:(1) Introduced the Fried tea ridge gold nickel iron ore field of tectonic attributive; Formation mainly by the basement and cover layers; South of the Yangtze plate tectonic graced by slightly suture zone and encourage north of two structural unit control, form a series of north east to, north cc to brittle fracture group and ductile shear zone, and nearly east-west and north east to drape; Zone from the archean to Mesozoic magmatism frequent, super base sex rock to acid rock are the exposed; Zone mineral wealth.(2) Summarizes the Fried tea ridge gold ore field with internal control toughening brittle shearing the characteristics, and brittle fracture and accused of JinRen brittle shearing belt ore-controlling structure characteristics. Accused of gold ductile shear zone is to and to NWW en ductile shear zone, according to the product of evolution, the distribution of the gold JinRen frying tea ridge charged with brittle shearing can be divided into three structural belt:north ore belt (HeGuYan gold ore belt in north and south, Raman gold) HeGuYan gold ore belt (south ore belts) and east ore belts (ZhangGuShan gold) ore-controlling toughening brittle shearing zone. Introduces three ore-controlling toughening brittle shearing belt ore-controlling structure characteristics. Charged with JinRen brittle shearing plays ZhengGu ditch, the west ZhangGuShan to fry tea ridge roughly around super base sexual contact with the exposed rock eastern. Gold YuChaoJi sex rock and main distribution of sinian MeiLeng YanHua bufo cliff group dolomite or dolomitic different metamorphose degree of mutual contact toughening brittle ore-controlling shear zone in. To F145 and F18 fault zone around the super base for boundary, the sexual contact with rock lithology MeiLeng YanHua snake for MeiLeng rock and YanHua slippery magnesium rocks, MeiLeng YanHua lingmei rock, for MeiLeng YanHua of surrounding rock lithology dolostone. Control JinRen brittle shearing trend and shun tendency along with all the slow wave shape. HeGuYan gold and gold ore in preparing a Raman, is in the F145 toughening brittle shearing and later left line shearing action fault occurred displacement stagger under caused to the left; ZhangGuShan gold north and south is also a orebody, is toughening brittle shearing and late in F145 fault left line shearing action happened under thedisplacement stagger caused to the left. Thus, according to the control characteristics of JinRen brittle shearing belt, and the distribution of gold orebodies, forming a "gold necklace" accused of gold pattern.(3) Summarizes the accused of nickel of shear band toughening brittle ore control structure characteristics. After the first two period after deformation, porphyry granite invaded, after 3) left line pressure twisting process of sexual shear activities porphyry granite, form for nuclear "sigma" type of rotating, and broken spot in northwest and southeast porphyry granite formation of low stress tensor expansion space, twisted with tectonic differentiation out of nickel and iron, etc, hydrothermal ore-forming elements into, hydrothermal reach expands, occurred filling positions after the function of enrichment nickel ore formation metasomatic iron ore, namely containing nickel and porphyry granite nickel ore is located in the northwest azimuth drag tail bits of ore-controlling shear zone, and iron ore is located in southeastern azimuth porphyry granite a ore-controlling dragged the tail of shear band. Mainly by toughening brittle deformation, chemical and MeiLeng tablet YanHua very development, with inner structure of the exposed rock MeiLeng YanHua mainly are:chemical, tablet intermediated-acidic intrusions snake slip magnesium rocks, slippery magnesia MeiLeng, lingmei qualitative different metamorphose degree, snake qualitative different metamorphose degree, tablet physicochemical lingmei rock and magnesium the qualitative tectonic schist, slippery magnesia tectonic schist, snake qualitative tectonic schist, etc.(4) Combined with gold nickel,iron orefrield characteristics, this paper probes into regional ductile shear zone and ore-controlling toughening brittle shearing zone of research in the control function of ore bodies. Ductile shear zone is gold nickel iron ore bed important guide ore and let mine tectonic; Toughening brittle shearing zone of differentiation of iron ore elements gold nickel, migration, the enrichment of the role of gold, iron ore output part, nickel, and production types, form a control function,And late for gold nickel ore brittle faults have significant damage.(5) According to the " three factors and one orebody " principle, forecast gold, nickel ore mineralization vision zone:ultramafic rocks and dolomite contact zone of the fracture is the main part of the prospecting area; secondary faults to the new branch is to find the key to the ore body; north Dolomite in the ultra-mafic dikes within the edge or the belt is a favorable position to find new mineralization; peripheral porphyry ore prospecting work is necessary;gold and nickel mineralization prospective areas in Jiudaoguai.