In September 2016, the Department of Land and Resources of ttenan Province announced that the First Geological Exploration Institute of Henan Bureau of Geo- Exploration ＆ Mineral Development had recently discovered a...In September 2016, the Department of Land and Resources of ttenan Province announced that the First Geological Exploration Institute of Henan Bureau of Geo- Exploration ＆ Mineral Development had recently discovered a new104.96-ton gold resource, with 122.034 tons of associated silver and also abundant natural soda and lead-zinc mineral resources in the deep and peripheral areas of the Laowan gold deposit in Tongbai County.展开更多
The Longxinggou Nappe which is located in Guangshui county, north of Hubei province, has been first identified by our detail mapping. It is composed of lowgrade metamorphosed rocks of middle Proterozoic Shuixian group...The Longxinggou Nappe which is located in Guangshui county, north of Hubei province, has been first identified by our detail mapping. It is composed of lowgrade metamorphosed rocks of middle Proterozoic Shuixian group, late Proterozoic Yaolinghe group, Sinian Liantuo,Doushantuo and Dengying formations. It is quite different from the lower beds, middle.Proterozoic Hong’an epidote-amphibole facies metamorphose metapelite and metagranite. They are different not only in composition, metamorphic degree, but also in deformation forms. The Longxinggou nappe has characteristics both of ductile thrusting and ductile dextral strike-sliping, illustrating a transpressive deformation regime of middle crustal in the orogenic belt due to the oblique collision, between the Shuiying terrain and the Tongbai terrain during Caledonian period.展开更多
Some eclogites and the related high-P metamorphic belt have been found for the first time from the Tongbai Mountains, Henan Province, where the eclogites and their probable retrogressive products —— garnet amphiboli...Some eclogites and the related high-P metamorphic belt have been found for the first time from the Tongbai Mountains, Henan Province, where the eclogites and their probable retrogressive products —— garnet amphibolites —— occur as lenses in mica-schists. The fresheclogites comprise garnet, omphacite, quartz, rutile, phengite, barroisite, etc. The composi-展开更多
The Tongbai-East Qinling Mountains, an important part of the Central orogenic belt, is one of the most important metallogenic belts in China and contains lots of orogenic-type and VMS-type （Volcanogenic Massive Sulfi...The Tongbai-East Qinling Mountains, an important part of the Central orogenic belt, is one of the most important metallogenic belts in China and contains lots of orogenic-type and VMS-type （Volcanogenic Massive Sulfide type） metallogenic systems. The Dahe and Shuidongling VMS-type Cu-Zn deposits, located in the Erlangping Group in Tongbai and East Qinling Mountains, respectively, show similar geological and geochemical features. The Huoshenmiao Formation in the East Qinling region and the Liushanyan Formation in the Tongbai region are spilite-keratophyre sequences occurring in the western and eastern sides of the Nanyang Basin, respectively, and are interpreted to be equivalent to each other. The orogenic-type Au-Ag deposits can be subdivided into two styles; namely, fault- or structure-controlled （e.g. Yindonggou） and stratabound （e.g. Poshan）. The Poshan and Yindongpo orogenic-type Au-Ag deposits, whose ore bodies are strictly hosted in carbonaceous strata in the Tongbai Mountains, show obvious stratabound characteristics. Their ore-fluids are enriched in K^＋ and SO^2-4 and are regarded as K^＋-SO^2-4 types. The Pb-isotope ratios of sulfides of the ores are extremely uniform and significantly different from those of the tectonostratigraphic terranes of the Qinling orogens except for the ore-hosting strata of the Waitoushan Formation. The Yindonggou and Xuyaogou orogenic Au-Ag deposits in the East Qinling Mountains, whose ore bodies are hosted in the faults cutting the hosting strata or granite body, show fault-controlled characteristics. Their ore-fluids belong to the Na^＋-Cl^- type. The Pb-isotope ratios of sulfides of ores are similar to those of the northern Qinling orogenic belt. The Waitoushan Formation, dominated by carbonaceous sericite-rich schists and only occurring in Tongbai region, should be detached from the Erlangping Group, which occurs both in the western and eastern sides of the Nanyang Basin. Future ore exploration in the Tongbai-East Qinling Mountains should focus on fault-controlled Au-Ag lodes.展开更多
以老湾金矿带上上河-彭家老庄、老湾-盛老庄金矿床为研究对象，通过野外地表和坑道观察，进行断裂产状统计、配套分析及构造性质与矿化类型耦合关系的研究，确立了老湾金矿带控矿构造体系性质及组合型式。上上河-彭家老庄金矿床以石英...以老湾金矿带上上河-彭家老庄、老湾-盛老庄金矿床为研究对象，通过野外地表和坑道观察，进行断裂产状统计、配套分析及构造性质与矿化类型耦合关系的研究，确立了老湾金矿带控矿构造体系性质及组合型式。上上河-彭家老庄金矿床以石英脉型矿化较为发育为特点，控矿断裂属走滑构造体系中的R型张扭性裂隙带，向北陡倾，走向（290°～310°）与主剪切带方向（286°）交角约为15°，具右行剪切特征，滑距约10 m。老湾-盛老庄矿床以蚀变岩型矿化为特征，充填脉型矿化不发育，其金矿控矿断裂属 P 型压扭性裂隙，向南缓倾，其总体走向近东西（约92°），与主剪切带方向的另一端交角约15°。3条规模较大的断裂蚀变带平面上右型侧列特点反映其滑移方向与上上河-彭家老庄控矿断裂滑移方向一致。综合整个矿带断裂产状及矿化信息，认为老湾金矿带控矿构造总体为以老湾和松扒断裂为边界断裂，由里德尔剪切体系中的P型和R型剪切带连结形成的辫状右行走滑剪切带。结合桐柏造山带区域地质演化历史，分析认为该脆性断裂构造带是早期韧性剪切带继承性演化的结果，反映桐柏造山带不同构造块体间斜向碰撞及随后地壳抬升作用的动力学演化过程。老湾金矿带右行走滑构造体系与成矿作用的耦合关系对矿床成因提供重要地质约束。展开更多
文摘In September 2016, the Department of Land and Resources of ttenan Province announced that the First Geological Exploration Institute of Henan Bureau of Geo- Exploration ＆ Mineral Development had recently discovered a new104.96-ton gold resource, with 122.034 tons of associated silver and also abundant natural soda and lead-zinc mineral resources in the deep and peripheral areas of the Laowan gold deposit in Tongbai County.
文摘The Longxinggou Nappe which is located in Guangshui county, north of Hubei province, has been first identified by our detail mapping. It is composed of lowgrade metamorphosed rocks of middle Proterozoic Shuixian group, late Proterozoic Yaolinghe group, Sinian Liantuo,Doushantuo and Dengying formations. It is quite different from the lower beds, middle.Proterozoic Hong’an epidote-amphibole facies metamorphose metapelite and metagranite. They are different not only in composition, metamorphic degree, but also in deformation forms. The Longxinggou nappe has characteristics both of ductile thrusting and ductile dextral strike-sliping, illustrating a transpressive deformation regime of middle crustal in the orogenic belt due to the oblique collision, between the Shuiying terrain and the Tongbai terrain during Caledonian period.
文摘Some eclogites and the related high-P metamorphic belt have been found for the first time from the Tongbai Mountains, Henan Province, where the eclogites and their probable retrogressive products —— garnet amphibolites —— occur as lenses in mica-schists. The fresheclogites comprise garnet, omphacite, quartz, rutile, phengite, barroisite, etc. The composi-
基金supported by the"973"project (2006CB403500),NSFC(Nos.40502012,40730421 and 40425006)the 111 Project(No.B07011).
文摘The Tongbai-East Qinling Mountains, an important part of the Central orogenic belt, is one of the most important metallogenic belts in China and contains lots of orogenic-type and VMS-type （Volcanogenic Massive Sulfide type） metallogenic systems. The Dahe and Shuidongling VMS-type Cu-Zn deposits, located in the Erlangping Group in Tongbai and East Qinling Mountains, respectively, show similar geological and geochemical features. The Huoshenmiao Formation in the East Qinling region and the Liushanyan Formation in the Tongbai region are spilite-keratophyre sequences occurring in the western and eastern sides of the Nanyang Basin, respectively, and are interpreted to be equivalent to each other. The orogenic-type Au-Ag deposits can be subdivided into two styles; namely, fault- or structure-controlled （e.g. Yindonggou） and stratabound （e.g. Poshan）. The Poshan and Yindongpo orogenic-type Au-Ag deposits, whose ore bodies are strictly hosted in carbonaceous strata in the Tongbai Mountains, show obvious stratabound characteristics. Their ore-fluids are enriched in K^＋ and SO^2-4 and are regarded as K^＋-SO^2-4 types. The Pb-isotope ratios of sulfides of the ores are extremely uniform and significantly different from those of the tectonostratigraphic terranes of the Qinling orogens except for the ore-hosting strata of the Waitoushan Formation. The Yindonggou and Xuyaogou orogenic Au-Ag deposits in the East Qinling Mountains, whose ore bodies are hosted in the faults cutting the hosting strata or granite body, show fault-controlled characteristics. Their ore-fluids belong to the Na^＋-Cl^- type. The Pb-isotope ratios of sulfides of ores are similar to those of the northern Qinling orogenic belt. The Waitoushan Formation, dominated by carbonaceous sericite-rich schists and only occurring in Tongbai region, should be detached from the Erlangping Group, which occurs both in the western and eastern sides of the Nanyang Basin. Future ore exploration in the Tongbai-East Qinling Mountains should focus on fault-controlled Au-Ag lodes.
文摘以老湾金矿带上上河-彭家老庄、老湾-盛老庄金矿床为研究对象，通过野外地表和坑道观察，进行断裂产状统计、配套分析及构造性质与矿化类型耦合关系的研究，确立了老湾金矿带控矿构造体系性质及组合型式。上上河-彭家老庄金矿床以石英脉型矿化较为发育为特点，控矿断裂属走滑构造体系中的R型张扭性裂隙带，向北陡倾，走向（290°～310°）与主剪切带方向（286°）交角约为15°，具右行剪切特征，滑距约10 m。老湾-盛老庄矿床以蚀变岩型矿化为特征，充填脉型矿化不发育，其金矿控矿断裂属 P 型压扭性裂隙，向南缓倾，其总体走向近东西（约92°），与主剪切带方向的另一端交角约15°。3条规模较大的断裂蚀变带平面上右型侧列特点反映其滑移方向与上上河-彭家老庄控矿断裂滑移方向一致。综合整个矿带断裂产状及矿化信息，认为老湾金矿带控矿构造总体为以老湾和松扒断裂为边界断裂，由里德尔剪切体系中的P型和R型剪切带连结形成的辫状右行走滑剪切带。结合桐柏造山带区域地质演化历史，分析认为该脆性断裂构造带是早期韧性剪切带继承性演化的结果，反映桐柏造山带不同构造块体间斜向碰撞及随后地壳抬升作用的动力学演化过程。老湾金矿带右行走滑构造体系与成矿作用的耦合关系对矿床成因提供重要地质约束。
