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lower angle detachment fault
相关语句
  低角度正断层(剥离断层
     The Xiaoban gold deposit,developed in Mayuanqun Group metamorphic rocks of Middle Proterozoic Era and controlled by the lower angle detachment fault northwest of the Puyang metamorphic core complex,is a medium low temperature magmatic hydrothemal deposit.
     肖坂金矿床是产于中元古界麻源群变质岩中 ,受发育于麻源群中的低角度正断层(剥离断层 )的控制 ,形成于燕山早期 ,属中低温岩浆热液矿床。
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  相似匹配句对
     angle.
     角。
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     Relationship of the Angle of Knee Joint and the injure of Lower Leg
     对膝关节夹角与下肢损伤关系的探讨
短句来源
     Results Two groups were lower facial-angle cases.
     结果 两组人群多为低角面型。
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     Angle of Eighty
     80°
短句来源
     ( b ) lower cost;
     (b)成本低;
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Puyang metamorphic core complex belongs to paleo-continental margin type and iscomposted of metamorphic complex core and hasal detachment belt. Becouse of thedestruction of later structures. The fold overlaps and unmetamorphic covers are not exposedwell. The core is consisted of Caledonian-Indosinian intermediate-acid intrusive rocks withgneissic structures. And the hasal detachment belt developed among Middle ProterozoicMayuan Grop metamorphic rocks, in which there are gneissic and mylonitic structures....

Puyang metamorphic core complex belongs to paleo-continental margin type and iscomposted of metamorphic complex core and hasal detachment belt. Becouse of thedestruction of later structures. The fold overlaps and unmetamorphic covers are not exposedwell. The core is consisted of Caledonian-Indosinian intermediate-acid intrusive rocks withgneissic structures. And the hasal detachment belt developed among Middle ProterozoicMayuan Grop metamorphic rocks, in which there are gneissic and mylonitic structures. Basedon the belt, there developed low-angle detachment fault system. The evolution of themetamorphic core complex controlls over the distribution and types of the gold deposits inthe area. For an example, the high-angle fault near the core controlls over the quartz-veintype, while the tectonic altered rock type is controlled by the low-angle detachment fault inthe northwest side of the core. According to the structural control of the ore .deposition, it isreferred that there is a prospective gold deposit of the tectonic altered rock type in the area,especially in the southeast side of the core.

蒲洋变质核杂岩属古大陆边缘型,由变质杂岩核和基底滑脱剥离带组成,因后期构造破坏,褶叠层和未变质盖层出露不齐全。变质杂岩核为加里东期─印支期的中酸性侵入岩,具片麻状构造;基底滑脱剥离带发育于中元古界麻源群变质岩中,具片麻状构造,并在此基础上发育了中浅层次低角度正断层系。肖圾地区金矿床受变质核杂岩生成演化的控制,近核部陡倾角断裂控制石英脉型金矿床、西北侧低角度正断层控制构造蚀变岩型金矿床。从构造控矿角度分析,受低角度正断层控制的构造蚀变岩型金矿床前景很大,在该变质核杂岩东南侧的葛坑─卓地─带是寻找与肖坂类似的构造蚀变岩型金矿床的有利地区。

The Xiaoban gold deposit,developed in Mayuanqun Group metamorphic rocks of Middle Proterozoic Era and controlled by the lower angle detachment fault northwest of the Puyang metamorphic core complex,is a medium low temperature magmatic hydrothemal deposit.It occurred in the early Yanshanian with a type of mineralization mainly as an altered and structural rock type and partly as a quartz vein type.The research works show...

The Xiaoban gold deposit,developed in Mayuanqun Group metamorphic rocks of Middle Proterozoic Era and controlled by the lower angle detachment fault northwest of the Puyang metamorphic core complex,is a medium low temperature magmatic hydrothemal deposit.It occurred in the early Yanshanian with a type of mineralization mainly as an altered and structural rock type and partly as a quartz vein type.The research works show that the source featurs of ore forming materials of the gold deposit ore mainly from Mayuanqun Group metamorphic rocks and partly from Mesozoic medium acid intrusive rocks.Main evidences are as follows.Firstly,the contents of Au in Zhuodi Formation and Gekeng Formation are about (5 8~11 9)×10 -9 .Secondly,the REE pattern,LREE/HREE,La/Sm and Sm/Nd of the gold ore are similar to these of metamorphic rocks.Thirdly,the δ 34 S is -2 7‰~-5 1‰,and the Pb isotopic plots belong to the orogenic belt with 206 Pb/ 204 Pb=17 518~18 210, 207 Pb/ 204 Pb=15 509~19 930 and 208 Pb/ 204 Pb=37 812~38 917.Fourthly,the ( 87 Sr/ 86 Sr) io of the altered minerals closely related to gold mineralization(chlorite)is 0 714 6~0 715 1.Moreover,it is impossible that is a layer of spilite keratophyre in Mayuanqun Group metamorphic rocks that supplied most ore forming materials.And all gold deposits or mineralized spots occur in the upwelling areas where there developed Mayuanqun Group metamorphic rocks and (or)around their areas where there developed a slight Jurassic volcanic rocks overburded upon Mayuanqun Group.Therefore,further exploration of gold deposits should be in the area where outcropped Mayuanqun Group metamorphic rocks and (or)the area where outcropped a slight Jurassic vocanic rocks overbruded upon Mayuanqun Group.

肖坂金矿床是产于中元古界麻源群变质岩中 ,受发育于麻源群中的低角度正断层(剥离断层 )的控制 ,形成于燕山早期 ,属中低温岩浆热液矿床。矿化类型以构造蚀变岩型为主 ,部分石英脉型。麻源群卓地组 (An Zz)和葛坑组 (An Zg)含金性可达 5.8× 1 0 -9~ 1 1 .9× 1 0 -9;不同类型矿石与变质岩 ,加里东期—印支期变形中酸性岩体的稀土元素配分模式 ,轻重稀土比值 ,La/Sm、Sm/Nd比值均具有非常相似的特征 ;矿石的硫同位素δ3 4 S介于 - 2 .7‰~ - 5.1‰ ,矿石铅同位素组成投影点位于造山带偏向地幔一侧 ,反映出本区铅来源具造山带特色 ;初始锶比值(87Sr/86Sr) io为 0 .71 4 6~ 0 .71 51 ;本区存在为金矿成矿提供主要矿源的细碧角斑岩的可能性很小 ,区域上金矿床 (点 )的分布主要局限于麻源群变质岩隆起区及其周边地区或麻源群之上侏罗纪火山岩比较薄的地区。上述特征反映出肖坂地区金矿床成矿物质 (成矿元素 ) ,主要来源于麻源群变质岩 ,但受到燕山早期重熔型岩浆岩的影响。因此 ,在区域上金矿找矿的战略方向应该是在麻源群变质岩分布地区及其周围 ...

肖坂金矿床是产于中元古界麻源群变质岩中 ,受发育于麻源群中的低角度正断层(剥离断层 )的控制 ,形成于燕山早期 ,属中低温岩浆热液矿床。矿化类型以构造蚀变岩型为主 ,部分石英脉型。麻源群卓地组 (An Zz)和葛坑组 (An Zg)含金性可达 5.8× 1 0 -9~ 1 1 .9× 1 0 -9;不同类型矿石与变质岩 ,加里东期—印支期变形中酸性岩体的稀土元素配分模式 ,轻重稀土比值 ,La/Sm、Sm/Nd比值均具有非常相似的特征 ;矿石的硫同位素δ3 4 S介于 - 2 .7‰~ - 5.1‰ ,矿石铅同位素组成投影点位于造山带偏向地幔一侧 ,反映出本区铅来源具造山带特色 ;初始锶比值(87Sr/86Sr) io为 0 .71 4 6~ 0 .71 51 ;本区存在为金矿成矿提供主要矿源的细碧角斑岩的可能性很小 ,区域上金矿床 (点 )的分布主要局限于麻源群变质岩隆起区及其周边地区或麻源群之上侏罗纪火山岩比较薄的地区。上述特征反映出肖坂地区金矿床成矿物质 (成矿元素 ) ,主要来源于麻源群变质岩 ,但受到燕山早期重熔型岩浆岩的影响。因此 ,在区域上金矿找矿的战略方向应该是在麻源群变质岩分布地区及其周围 ,特别是有燕山早期中酸性侵入岩的附近 ;在侏罗纪火山岩分布地区 ,则应该在火山岩比较薄的部位寻找金矿床。

In this paper the Hefangkou low-angle detachment fault on the east side of the Yunmeng Shan metamorphic core complex is chosen as the object of research. According to the deformation features and formation environment of biotite (which is the main mineral of foliation and lineation in the Hefangkou ductile shear zone), the temperature and pressure conditions for the tectono-thermal evolution at the fault zone were 780-860℃ and-0.73-0.86 GPa. The genetic mechanism for the metamorphic...

In this paper the Hefangkou low-angle detachment fault on the east side of the Yunmeng Shan metamorphic core complex is chosen as the object of research. According to the deformation features and formation environment of biotite (which is the main mineral of foliation and lineation in the Hefangkou ductile shear zone), the temperature and pressure conditions for the tectono-thermal evolution at the fault zone were 780-860℃ and-0.73-0.86 GPa. The genetic mechanism for the metamorphic core complex is as follows: in the setting of regional extension, the semi-solid Yunmeng Shan granite was involved in the Hefangkou-Shuiyu extensional ductile shear zone at the southeast side, thus resulting in ductile deformation of granites under intermediate- to high-temperature conditions, and afterward, this ductile shear zone passed progressively to the shallow level in the uplift process, forming some shallow-level brittle extensional structures.

以云蒙山变质核杂岩东侧的河防口低角度正断层为研究对象,通过矿物(黑云母)的变形特征和形成环境分析,获得了该断层带上的构造热演化环境:温度为780-860℃,压力约为7.3×108-8.6×108Pa。提出云蒙山变质核杂岩的成因机制是,在区域伸展背景下,处于半固结状态的云蒙山花岗岩在东南侧卷入河防口-水峪伸展型韧性剪切带,使花岗岩发生中高温条件的韧性变形;之后,该韧性剪切带在隆升过程中不断向浅层次过渡,形成了一些浅层次的脆性伸展变形构造。

 
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