A Metallogenic Model of Gold Deposits of the Jiaodong Granite-Greenstone Belt

来源 :Acta Geologica Sinica(English Edition) | 被引量 : 0次 | 上传用户:lh923
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
An analysis of trace elements and isotopic geochemistry suggest that the ore-forming materials of gold deposits in the Jiaodong granite-greenstone belt have multiple sources, especially the mantle source. Seismic wave, magnetic and gravity fields show that the crust-mantle structure and its coupling mechanism are the fundamental dynamic causes for the exchange and accumulation of materials and energy in the metallogenic system. Considering the evolution history of the structural setting, the tectono-metallogenic dynamics model of the area can be summarized as follows: (1) occurrence of the greenstone belt during the Archean-Proterozoic-the embryonic form of Au-source system; (2) stable tectonic setting in the Paleozoic-an intermittence in gold mineralization; (3) intensive activation and reformation of the greenstone belt in the Mesozoic-tectono-mineralization and tectono-diagensis; (4) posthumous structural activity in the Cenozoic-destruction of orebodies in the later stage. In the middle and late Ind An analysis of trace elements and isotopic geochemistry suggest that the ore-forming materials of gold deposits in the Jiaodong granite-greenstone belt have multiple sources, especially the mantle source. Seismic wave, magnetic and gravity fields show that the crust-mantle structure and its coupling mechanism are the fundamental dynamic causes for the exchange and accumulation of materials and energy in the metallogenic system. the greenstone belt during the Archean-Proterozoic-the embryonic form of Au-source system; (2) stable tectonic setting in the Paleozoic-an intermittence in gold mineralization; (3) intensive activation and reformation of the greenstone belt in the Mesozoic-tectono -mineralization and tectono-diagensis; (4) posthumous structural activity in the Cenozoic-destruction of orebodies in the later stage. In the m iddle and late Ind
其他文献
长江流域综合利用规划要点报告(1988年修订)审查会于5月29日至6月5日在北京召开。这次会议由全国水资源与水土保持领导小组主持,参加会议的代表共283名,其中有全国水资源与
阐述了波阻抗反演技术的处理和解释方法。结合实际资料,在国内首次运用波阻抗反演技术 解释岩浆岩侵入煤层范围,获得了较为理想的地质效果。 The methods of processing and
大学英语的第一堂课是学生由中学英语学习向大学英语学习过渡的重要转折点。作为教学基本组成部分的教师和学生只有建立了相互的理解,就英语学习的重要性、课程学习的内容、
《水法》的颁布与实施,标志着我国在开发利用水资源和防治水害方面走上了注重效益、全面管理、协同各方、依法治水的新阶段。建国以来,在党和政府领导下,我国虽进行了大规模
2014年深秋,省城合肥,《寂寞汉卿》一炮打响。这一季,再芬黄梅艺术剧院同时携四部黄梅戏舞台大剧强势登陆安徽大剧院,年度原创大戏《寂寞汉卿》作为主打戏率先亮相。大幕开启
本文利用概化手段建立了小浪底地下厂房和尾水洞两剖面复杂岩体的地质模型,提出了相应的几何仿真程序技术,建立了能反映岩体中层面、软弱夹泥层节理及岩块的非线性力学行为的
原始苍茫的神农架,是一片古老而神奇的土地。东连荆襄,西通巴蜀,南接彝陵,北临武当,因华夏始祖炎帝神农在此搭架采药而得名。在这里,秦岭、大巴山东端茫茫群峰竟相耸立,千峰
带状注扩展互作用速调管(SBEIK)结合了带状注速调管与扩展互作用速调管的优势,在微波和毫米波真空电子器件中具有显著的技术潜力.本文提出了应用于SBEIK的五间隙哑铃型扩展互
中介语石化是二语习得中一个普遍现象。本文通过调查大学生学习英语的现状,分析了目前普遍存在于大学英语学习过程中的石化现象及石化产生的隐性因素和显性因素,提出缓解石化
作为书面语的一种辅助性系统,标点符号有严格意义与非严格意义之分。非严格意义标点符号在当代借由网络媒介获得了前所未有的发展,并对严格意义范畴内《标点符号用法》的规范