锦丰（烂泥沟）金矿地质特征及找矿方向浅析     

王旭阳  王方里  王宏阳 《云南地质》2014,(1):130-132,137

锦丰（烂泥沟）金矿由磺厂沟复式向斜控制了矿体的空间分布,发育于磺厂沟复式向斜中的一系列断裂控制了矿床的产出位置,不同的岩性组合控制了矿体的具体产出层位.在矿床的形成过程中F3断裂不仅是矿区的主要导矿构造也是矿区的主要容矿构造,在矿床的形成过程中由于不同断块的差异运动导致了磺厂沟向斜不同的变形部位出露在同一水平的现象,为今后的矿床预测指明了方向.  相似文献   

江西范家坳铅锌矿区的成矿构造类型及成矿前景     

韦龙云  李庚华  曹艳超  李关勇 《云南地质》2014,(1):138-140,150

江西范家坳铅锌矿矿区是由两条主边界断裂控制,其内发育的北东向的脆性剪切破裂带为所夹块体内的P型剪切破裂——北东向压扭性剪节理系,该剪节理带控制着本矿区的矿化（点）的分布.通过构造解析后认为,江西范家坳铅锌矿控矿构造为节理型脆性剪切带,成矿构造类型主要为构造细脉型,本文试图从构造控矿的角度出发,去探讨成矿构造控矿的本质及其内在的成因联系.从该区铅锌矿床成矿构造类型的划分及控矿构造类型的研究,初步讨论了江西范家坳铅锌矿主要矿化异常（点）的成矿前景.  相似文献   

云南新平县库独木金矿矿床成因浅析     

樊灏  陈国荣  马杰 《云南地质》2014,(4):532-537

库独木金矿属韧性剪切带浸染型金矿床,含矿岩层为泥盆系上统（D3）绢云板岩、硅质岩.矿体呈似层状、透镜状产出,矿床主要受构造控制.  相似文献   

云南勐腊茅草山铜矿成矿规律     

洪建磊 《云南地质》2014,(1):40-44

茅草山铜矿矿体赋存于下古近系勐野井组下段与上白垩统曼宽河组之不整合界面上,认为茅草山铜矿的形成具有典型的层控特征;此外,从矿体分布规律及矿物产出特征来看,矿体形成于亦受构造作用影响.并进行了成矿远景分析.  相似文献   

南堡凹陷3号构造带中深层层序地层特征与油气关系     

乔海波  宋璠  夏景生  赵子骏  赵晓东  兰志勤 《沉积与特提斯地质》2017,37(1):18-24

地层划分问题一直制约了南堡凹陷3号构造带中深层(沙三段—东一段)的后续油藏评价研究。本文基于层序界面在地震反射结构特征、岩性突变以及电测曲线等方面的特征变化,共识别出该带4个二级层序界面,8个三级层序界面,并将该带沙三段—东一段划分出3个二级层序和7个三级层序。研究表明,南堡凹陷3号构造带中深层层序发育样式受湖盆结构及构造坡折带影响,三级层序厚度由南西至北东方向总体呈增厚趋势,由北西至南东方向总体呈厚—薄—厚的发育特征。在对层序地层特征研究的基础上,分析了层序地层与油气的关系,认为研究区沙一段中层序存在构造与地层控制的油气藏,而在东营组层序存在构造与岩性共同控制的油气藏,并且在南堡凹陷3号构造带中深层存在有利的构造与岩性、构造与地层共同控制的复杂油气藏发育带。  相似文献   

On the Sun’s distance from the center and the shape of the inner halo in the Galaxy: Gaia EDR3, HST and literature globular clusters     

《New Astronomy》2022

A statistical method is used to derive both the Sun’s distance $r_0$ from the Galactic Center (GC) and the 3D geometry of the inner ($<$ 25 kpc) halo. The spatial distribution of the 138 Gaia EDR3 globular clusters (GCs) with distances established on a combination of HST and literature data of Baumgardt and Vasiliev (2021) is explored. An estimate by using these ancient objects of the pressure-supported subsystem of the Galaxy with newly derived distances leads to the mean $r_0=7.81\pm 0.14$ kpc. The distribution of GCs within 25 kpc is almost spherically symmetric, and has the shape of an ellipsoid with a major axis of its symmetry slightly elongated toward the Sun and two minor axes of almost the same length. The obtained scale-length ratio of the major axis to the minor axis in the plane and to the vertical axis of the ellipsoid is $\approx$ 1:0.8:0.7. Based on the papers of a series, for practical use we argue to employ the following Sun’s distances from the GC and the plane: $r_0=8.15\pm 0.15$ kpc and $z_0=15\pm 5$ pc.  相似文献   

Petrology,structure and age of the Rough Point sill,Donegal     

R. Elsdon 《Geological Journal》1986,21(2):151-168

The Rough Point sill, which is one of the thickest of a large number of sills intruded into the Appin Group metasediments of the Dalradian sequence in north Donegal, contains a number of internal features including mafic:felsic banding, pegmatite bands and significant variations in grain size. There are also appreciable variations in mineralogy, particularly the proportions of plagioclase and amphibole, and in the major and trace element chemistry. Together these features indicate that the sill is, like the metasediments which it intrudes, inverted, and is therefore older than the Caledonian F₂ structures which caused the inversion. Disruption of the sediments at the sill contact is also earlier than the F₂ event. The timing of the basic magmatic episode together with the geochemistry of the sill invite comparison with the metadolerites of the southwest Highlands of Scotland.  相似文献   

基于自组织临界现象的中期地震预报算法研究          下载免费PDF全文

兰从欣  郭大庆  石特临 《地震工程学报》1997,19(1):5-14

在自组织临界现象，几何相变等物理理论的基础上，开发研究了基于自组织临界现象的中期地震预报算法，提出并定义了自组织临界行为的结构强度，简称ＧＳＩ值，ＣＳＩ值是反映地震活动的一个综合指标，其变化较好地反映了地震活动演化进程，ＣＳＩ值是反映地震活动的一个综合指标，其变化较好地反映了地震活动演化进程。对多个震例的研究表明，大地震发生前结构强度ＣＳＩ值存在一个增大的过程，这和理论结果基本一致，利用演化图和时  相似文献   

The properties of hybrid stars in a low symmetry energy model     

《New Astronomy》2022

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