地域重构视角下区域空间生产与治理——以深汕特别合作区为例     

张衔春  唐承辉  岳文泽 《地理科学》2022,42(3):373-380

从资本、权力与社会的地域重构视角系统探索了中国区域空间生产与治理的相互关系及作用机制。分析珠三角典型的“飞地经济”深汕特别合作区的地域重构过程,研究发现,首先,区域空间生产一方面依赖于政府的政策动员,另一方面企业主体的空间偏好决定了区域空间生产的结果。其次,区域治理对区域空间生产的多尺度修复是动态调整的,以资本的空间需求为导向。最后,区域空间生产与区域治理协同演进并相互促进。结果表明,中国城市区域的形成是“规划中心,市场为器”的国家治理体制在区域尺度的具体表现。现代政府治理能力的建构与对地方本位主义的路径依赖需要更深层次的激励机制与制度设计。  相似文献   

云南省大理—弥渡笔架山金矿矿化特征     

王文超  刘晓明  刘利超  杨枝斌  肖亚旭 《云南地质》2014,(2):219-225

矿区大地构造位于扬子准地台与三江褶皱带的过渡部位,属丽江台缘褶皱带的南部.处于程海深大断与裂金沙江—哀牢山两条深大断裂夹持的倒三角地带,区内出露地层主要有泥盆系下统青山组灰岩、康廊组白云质灰岩及奥陶系下统石英砂岩;岩浆岩有花岗斑岩、二长斑岩、煌斑岩及辉绿岩.有红色粘土型、残坡积型、构造破碎带蚀变岩型及斑岩型四种矿化类型.  相似文献   

云南勐腊龙巴河小红桥组构造角砾岩型铜矿     

和松文  刘仕军 《云南地质》2014,(1):127-129

矿体赋存于中侏罗统小红桥组（花开左组下部）上段近东西向断裂破碎带中.已圈定V1、V2两个矿体,分别受F1、F2断裂控制,伴生Pb、Zn、Ag、Co、Ni,矿石以辉铜矿、黑黝铜矿为主,应属受断裂破碎带控制的构造角砾岩热液型铜矿床.  相似文献   

西双版纳勐海西定破碎带蚀变岩型金矿     

廖锦川  雷红彦  孙以荣 《云南地质》2014,(1):55-57,70

金矿体赋存于澜沧群惠民组上段中下部F2断层破碎带中,构造角砾岩、碎裂岩、碎斑岩是主要含金岩类.氧化矿石,金包裹于褐铁矿及绢云母中、少量自然金,属中低温破碎带蚀变岩型金矿.  相似文献   

扬子地块西南边缘活动带成矿机理及找矿方向     

范玉华 《云南地质》2014,(4):447-451

扬子地块的西南边缘活动带,在印支板块、欧亚板块多次碰撞下,导致其不断被破裂、挤压、拉伸,并伴随强烈的岩浆活动及成矿作用.独特的成矿环境,表现为多期性、继承性和分带性成矿特征,因此区内尚有较大的找矿潜力.  相似文献   

http://www.sciencedirect.com/science/article/pii/S1674987114000218     

Jan Marten Huizenga  Dirk van Reenen  jacques L.R.Touret 《地学前缘(英文版)》2014,5(5):673-682

Fluid infiltration into retrograde granulites of the Southern Marginal Zone(Limpopo high grade terrain)is exemplified by hydration reactions.shear zone hosted metasomatism,and lode gold mineralisation.Hydration reactions include the breakdown of cordierite and orthopyroxene to gedrite kyanite,and anthophyllite,respectively.Metamorphic petrology,fluid inclusions,and field data indicate that a low H_2O-activity carbon-saturated CO_2-rich and a saline aqueous fluid infiltrated the Southern Marginal Zone during exhumation.The formation of anthophyllite after orthopyroxene eslablished a regional retrograde anthophyllite-in isograd and occurred at P-T conditions of- 6 kbar and 610 C,which fixes the minimum mole fraction of II.0 in the CO_2-rich fluid phase at- 0.1.The maximum H_2O mole fraction is hxed by the lower temperature limit(~800℃) for partial melting at ~0.3.C-O-H fluid calculations show that the CO_2-rich fluid had an oxygen fugacity that was 0.6 log10 units higher than that of the fayalite-magnetitequartz buffer and that the CO_2/(CO_2+CH_4) mole ratio of this fluid was 1.The presence of dominantly relatively low density CO_2-rich fluid inclusions in the hydrated granulites indicates that the fluid pressure was less than the lithostatic pressure.This can be explained by strike slip faulting and/or an increase of the rock permeability caused by hydration reactions.  相似文献   

Zircon U‐Pb/Lu‐Hf and monazite chemical dating of the Tirodi biotite gneiss: implication for latest Palaeoproterozoic to Early Mesoproterozoic orogenesis in the Central Indian Tectonic Zone     

Santanu Kumar Bhowmik  Simon A. Wilde  Anubha Bhandari 《Geological Journal》2011,46(6):574-596

In this investigation, we reconstruct the latest Palaeoproterozoic to Early Mesoproterozoic orogenic events along the southern margin of the Central Indian Tectonic Zone (CITZ), using sensitive high resolution ion microprobe (SHRIMP) U‐Pb zircon dating and Lu‐Hf isotope analyses of zircon and Th‐U‐Pb chemical dating of monazite from samples of the Tirodi biotite gneiss (TBG) unit in the Sausar Mobile Belt (SMB), the latter constituting the southernmost litho‐tectonic component of the CITZ. U‐Pb zircon dating of one migmatitic gneiss sample from the type locality of the Tirodi biotite gneiss in the northern domain of the SMB has yielded an age of 1618 ± 8 Ma, which is considered to be the time of magmatic crystallization of its protolith. Combined U‐Pb zircon and monazite chemical dating of two granite gneiss samples from the southern domain of the SMB broadly constrain magmatic crystallization between 1603 ± 23 Ma and 1584 ± 17 Ma and an overprinting metamorphic recrystallization event at 1572 ± 7 Ma. Monazites from the granite gneiss samples also record a terminal metamorphic event at 1415 ± 23 Ma. Lu‐Hf isotopic analyses of zircons reveal fundamentally different source rock reservoirs for the protoliths of these magmatic rocks across the SMB. While the type TBG from the northern domain was derived from an Early Palaeoproterozoic source T(Hf) from 2093 to 2523 Ma, with a mean value at 2379 Ma) of essentially juvenile material with minor crustal components (εHf(t) from −3.3 to + 3.7), the granite from the southern domain had a mature crustal source (εHf(t) from −12.5 to −21.9) of Palaeoarchaean age T(Hf) from 3051 to 3630 Ma, with a mean value at 3218 Ma). When integrated with metamorphic information previously obtained from the 1.6 Ga ultra‐high temperature granulite facies metamorphic event in the SMB, the discrete magmatic and metamorphic events between 1.62/1.60 Ga and 1.42 Ga can be correlated with the formation of an Early Mesoproterozoic accretionary orogen in the CITZ. Copyright © 2011 John Wiley & Sons, Ltd.  相似文献   

个旧市区寻找地下水供水水源地的可行性探讨     

李荣文 《云南地质》2010,29(3):328-330,322

个旧市处于红河和南盘江两大水系分水岭地带,地表分水岭与地下水分水岭不一致。地下水主要受降雨量、地质构造、地层岩性的控制。岩溶水是地下水供水水源地勘查对象。  相似文献   

云南金平长安金矿矿石类型及分带     

何忠福  吴文辉  蔡培全 《云南地质》2010,29(3):266-268,256

应用氧化铁含量变化确定矿石类型,分带界线初定为1 645米中段,但无法确定混合带界线,开发中很难满足生产。通过柱浸试验浸出率确定矿石类型,即可正确分带。  相似文献   

海岸带侵蚀灾害研究进展及思考   总被引：1，自引：0，他引：1  

于德海  彭建兵  李滨 《工程地质学报》2010,18(6):867-872

在当今全球海平面上升的背景下,海岸侵蚀灾害已严重威胁着海岸带生存和生活环境,逐渐成为各相关领域的一个热点研究课题。因此,在总结中国典型海岸段侵蚀灾害的基础上,深刻探讨国内外海岸带侵蚀研究现状,并就此提出存在的两个关键性问题。最后,指出今后应重点加强以下5个方面的研究:(1)海岸侵蚀与地质环境条件的相关关系;(2)海岸侵蚀分区特征与发育分布规律;(3)侵蚀海岸的变形破坏模式;(4)岩土体在各种侵蚀因子作用下力学特性变化;(5)海岸稳定性的评价机制。  相似文献