StudyonSealevelFluctuationGeodynamicsofCarbonateDepostitionalCyclesintheNorthChinaPlatform－－theCambr

ＳｔｕｄｙｏｎＳｅａｌｅｖｅｌＦｌｕｃｔｕａｔｉｏｎＧｅｏｄｙｎａｍｉｃｓｏｆＣａｒｂｏｎａｔｅＤｅｐｏｓｔｉｔｉｏｎａｌＣｙｃｌｅｓｉｎｔｈｅＮｏｒｔｈＣｈｉｎａＰｌａｔｆｏｒｍ－－ｔｈｅＣａｍｂｒｉａｎＭｉｌａｎｋｏｖｉｔｃｈＧｅｏｌｏｇｉｃａｌ...     

Sequence Stratigraphic Features of Mesozoic－Cenozoic Nonmarine Sediments in Eastern China

ＳｅｑｕｅｎｃｅＳｔｒａｔｉｇｒａｐｈｉｃＦｅａｔｕｒｅｓｏｆＭｅｓｏｚｏｉｃ－ＣｅｎｏｚｏｉｃＮｏｎｍａｒｉｎｅＳｅｄｉｍｅｎｔｓｉｎＥａｓｔｅｒｎＣｈｉｎａ￥ＸｕＨｕａｉｄａ；ＷｅｉＫｕｉｓｈｅｎｇ（ＤｅｐａｒｔｒｍｅｎｔｏｆＥｎｅｒｇｙＲｅｓｏ...     

35 Ma－An Important Natural Periodicity in Geological History： Concept of Natural Crisis and Its Possible Cause

３５Ｍａ－ＡｎＩｍｐｏｒｔａｎｔＮａｔｕｒａｌＰｅｒｉｏｄｉｃｉｔｙｉｎＧｅｏｌｏｇｉｃａｌＨｉｓｔｏｒｙ：ＣｏｎｃｅｐｔｏｆＮａｔｕｒａｌ Ｃｒｉｓｉｓ ａｎｄ Ｉｔｓ Ｐｏｓｓｉｂｌｅ ＣａｕｓｅＳｈｉＸｉａｏｙｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＧｅｏ?..     

扬子地台前寒武纪－寒武纪界线地层的微体植物化石群

前寒武纪一寒武纪界线地层在扬子地台发育良好、分布广泛,并有包括微体植物群、海藻、瓶形原生物、具硬体动物及‘澄江动物群’等化石的发现。因而,扬子地台成为研究前寒武纪－寒武纪界线生物地层的代表地区之一。基于对扬子地台前寒武纪－寒武纪界线地层已知微体植物化石记录的回顾和论定,总结概括了下寒武统微体植物化石组合：寒武系最底部硅质磷块岩中的Ｍｉｃｒｈｙｓｔｒｉｄｉｕｍ－Ｐａｒａｃｙｍａｔｉｏｓｐｈａｅｒａ－Ｍｅｇａｔｈｒｉｘ组合和较高层位页岩的Ｓｋｉａｇｉａ－Ａｎｎｕｌｕｍ－Ａｒｃｈａｅｏｄｉｓｃｉｎａ组合。它们分别与Ａｎａｂａｒｉｔｅｓ－Ｃｉｒｃｏｔｈｅｃａ－Ｐｒｏｔｏｈｅｒｔｚｉｎａ小壳动物化石带和Ｐａｒａｂａｄｉｅｌｌａ及Ｅｏｒｅｄｌｉｃｈｉａ三叶虫带相对应。与东欧地台疑源类生物地层相对照,扬子地台Ｍｉｃｒｈｙｓｔｒｉｄｉｕｍ－Ｐａｒａｃｙｍａｔｉｏｓｐｈａｅｒａ－Ｍｅｇａｔｈｒｉｘ组合的纵向分布大体和东欧地台Ａｓｔｅｒｉｄｉｕｍｔｏｒｎａｔｕｍ－Ｃｏｍａｓｐｈａｅｒｉｄｉｕｍｖｅｌｖｅｔｕｍ组合带相一致,而以上两地台的化石组合产出层位可能都略高于纽芬兰东部剖面,依据Ｐｈｙｃｏｄｅｓｐｅｄｕｍ所厘定的寒武系底界?     

A Comparison about Metamorphism among the Oldest-Rock Units from Orogenic Belts of Dabie, Eastern Qinling and Eastern Kunlun of Central Mountain Ranges, China

ＴｈｅＣｅｎｔｒａｌＭｏｕｎｔａｉｎＲａｎｇｅｓｏｆＣｈｉｎａ,ｗｈｉｃｈｏｃｕｐｙｔｈｅｃｅｎｔｒａｌｐａｒｔｏｆＣｈｉｎａ,ｃｏｍｐｒｉｓｅｍａｉｎｌｙｔｈｅＤａｂｉｅＭｏｕｎ－ｔａｉｎｓｉｎｔｈｅｅａｓｔ,ｔｈｅＱｉｎｌｉｎｇＭｏｕｎｔａｉｎｓ...     

Nd and Sr Isotope Constraints on the Age and Origin of Proterozoic Meta mafic Volcanic Rocks in the Bainaimiao Wenduermiao District, South central Inner Mongolia, China

１－Ｉｎｔｒｏｄｕｃｔｉｏｎ　ＴｈｅｏｒｏｇｅｎｉｃｂｅｌｔｏｆＩｎｎｅｒＭｏｎｇｏｌｉａｉｓｌｏｃａｔｅｄｂｅｔｗｅｅｎｔｈｅＮｏｒｔｈＣｈｉｎａＣｒａｔｏｎａｎｄｔｈｅＳｉｂｅｒｉａｎＰｌａｔｆｏｒｍ．ＴｈｉｓｂｅｌｔｉｓｃｏｎｓｉｄｅｒｅｄａｐａｒｔｏｆｔｈｅＣｅｎｔｒａｌＡｓｉａＭｏｎｇｏｌｉａｎｇｅｏｓｙｎｃｌｉｎｅ（ＩｃｈｉｋａｗａａｎｄＷａｎｇ,１９９１）ｏｒＣｅｎｔｒａｌＡｓｉａｎＭｏｎｇｏｌｉａｎｍｏｂｉｌｅｂｅｌｔ．ＴｈｅｎｏｒｔｈｅｒｎｌｉｍｉｔｏｆｔｈｅＮｏｒｔｈＣ…     

Metallogenic Dynamics of Zhashui Ag－Pb Polymetallic Ore Deposit in Shaanxi，China

ＭｅｔａｌｌｏｇｅｎｉｃＤｙｎａｍｉｃｓｏｆＺｈａｓｈｕｉＡｇ－ＰｂＰｏｌｙｍｅｔａｌｌｉｃＯｒｅＤｅｐｏｓｉｔｉｎＳｈａａｎｘｉ，ＣｈｉｎａＷｅｉＪｕｎｈａｏ；ＬｉＪｉａｎｗｅｉ；ＷａｎｇＳｉｙｕａｎ（ＦａｃｕｌｔｙｏｆＥａｒｔｈＲｅｓｏｕｒｃｅｓ...     

Geochemistry of Thermal－Mineral Waters in Siping＇an District， Shanxi Province， China

ＧｅｏｃｈｅｍｉｓｔｒｙｏｆＴｈｅｒｍａｌ－ＭｉｎｅｒａｌＷａｔｅｒｓｉｎＳｉｐｉｎｇ＇ａｎＤｉｓｔｒｉｃｔ，ＳｈａｎｘｉＰｒｏｖｉｎｃｅ，Ｃｈｉｎａ￥ＷａｎＹａｎｘｉｎ；ＳｕｎＬｉａｎｆａ（ＤｅｐａｒｔｍｅｎｔｏｆＨｙｄｒｏｇｅｏｌｏｇｙａｎｄＥｎ...     

Tancheng－Lujiang Fault System： Its Characters and Control on Oil－Gas Distribution in Eastern China

Ｔａｎｃｈｅｎｇ－ＬｕｊｉａｎｇＦａｕｌｔＳｙｓｔｅｍ：ＩｔｓＣｈａｒａｃｔｅｒｓａｎｄＣｏｎｔｒｏｌｏｎＯｉｌ－ＧａｓＤｉｓｔｒｉｂｕｔｉｏｎｉｎＥａｓｔｅｒｎＣｈｉｎａＣｈｅｎＱｕａｎｍａｏ；ＬｉａｎｇＸｉａｏｄｏｎｇ；ＺｈａｎｇＧｕａｎｇｙａ；...     

河北唐山—卢龙地区寒武－奥陶系界线地层的牙形刺及其重要属种的演化

本文对唐山和卢龙地区寒武－奥陶系界线地层中的牙形刺再次进行研究，厘定了过去报道的一些重要属种，并对最具地层意义的Ｃｏｒｄｙｌｏｄｕｓ的几个种的演化进行了分析。指出了该属的两个进化系列，第一支进化系列是Ｅｏｃｏｎｏｄｏｎｔｕｓｎｏｔｃｈｐｅａｋｅｎｓｉｓ－Ｃｏｒｄｙｌｏｄｕｓｐｒｉｍｉｔｉｖｕｓ－Ｃ．ｐｒｏａｖｕｓ－Ｃ．ｃａｂｏｔｉ－Ｃ．ｉｎｔｅｒｍｅｄｉｕｓ－Ｃ．ａｎｇｕｌａｔｕｓ；而另一支则是Ｅｏｃｏｎｏｄｏｎｔｕｓｎｏｔｃｈｐｅａｋｅｎｓｉｓ－Ｃ．ｃａｂｏｔｉ－Ｃ．ｐｒｏｌｉｎｄｓｔｒｏｍｉ－Ｃ．ｌｉｎｄｓｔｒｏｍｉ－Ｃ．ｐｒｉｏｎ。本文对寒武－奥陶系界线的几个划分方案也进行了简单的讨论     

本刊2006-09-13讯

2006-03-25本刊编辑部收到“浙大玉泉”读者的来信：“贵刊的1998年第三期由山东水利专科学校设计院李林山先生撰写的《喷锚支护与土钉墙》一文被沈阳大学朱江、张忠二人剽窃，其内容甚至题目均基本相同，实乃令人震惊与遗憾。”（《沈阳大学学报》2003年6月第15卷第2期上[文章编号1008-9225（2003）02-0070-02]）。     

义敦成矿带铜银铅锌锡矿产资源调查评价进展与潜力

义敦成矿带地处独特的大地构造部位，经历了复杂的地质构造演化和强烈的岩浆活动，成矿条件优越，矿产资源丰富。1999年实施国土资源地质大调查以来，相继发现了普朗、松诺、卓玛斑岩铜矿；砂西、热朗泽、夏隆等银铅锌矿；热隆、脚根玛锡矿；打马池觉铜金矿等一批具有重要找矿前景的矿床(点)。该地区矿产资源勘查工作程度低，蕴藏着较大的找矿潜力，有望成为国家级重要的有色及贵金属矿产勘查和开发基地。     

Experimental Study of Cement - Sandstone/Shale - Brine - CO2 Interactions

Background

Reactive-transport simulation is a tool that is being used to estimate long-term trapping of CO₂, and wellbore and cap rock integrity for geologic CO₂ storage. We reacted end member components of a heterolithic sandstone and shale unit that forms the upper section of the In Salah Gas Project carbon storage reservoir in Krechba, Algeria with supercritical CO₂, brine, and with/without cement at reservoir conditions to develop experimentally constrained geochemical models for use in reactive transport simulations.

Results

We observe marked changes in solution composition when CO₂ reacted with cement, sandstone, and shale components at reservoir conditions. The geochemical model for the reaction of sandstone and shale with CO₂ and brine is a simple one in which albite, chlorite, illite and carbonate minerals partially dissolve and boehmite, smectite, and amorphous silica precipitate. The geochemical model for the wellbore environment is also fairly simple, in which alkaline cements and rock react with CO₂-rich brines to form an Fe containing calcite, amorphous silica, smectite and boehmite or amorphous Al(OH)₃.

Conclusions

Our research shows that relatively simple geochemical models can describe the dominant reactions that are likely to occur when CO₂ is stored in deep saline aquifers sealed with overlying shale cap rocks, as well as the dominant reactions for cement carbonation at the wellbore interface.     

Geological - Geophysical - Geochemical Exploration Models of Copper - Iron Deposits in Southeastern Hubei

This paper discusses geological-geophysical-geochemical models of such typical deposits as the Tieshan-type Fe-Cu deposit, the Tonglushan-type Cu-Fe deposit, the Yehuaxiang-type Cu deposit, the Jiguanzui-type Cu-Au deposit, and the Tongshankou-type Cu (Mo) deposit. The models were established based on practical data of the polymetallic deposits dominated by copper ore in southeastern Hubei. These models, which are graphically illustrated in the paper, systematically summarize the metallogenic geological conditions and the geophysical-geochemical characteristics of copper deposits in this area. The models are of practical significance for studying copper deposits, predicting mineral resources, choosing exploration methods, and searching for ore deposits based on existing ones in the study area.     

湖南水口山铅锌金银矿床地球化学特征

根据湘南区域地球化学特征,结合水口山矿田之成矿地质矿床特点.分别研究了不同层位、不同岩性的微量元素地球化学特征以及不同构造条件下的地球化学形为,对两大不同成岩、成矿系列中不同微量元素组合可引起的原、次生晕异常可形成的特征作了较为深入研究、讨论,并总结出化探异常元素组合特点与找矿意义.     

三维多极距中梯测深的模拟研究

多极距中梯测深法是一种效率高、信息丰富的新型体积测深技术,而当前常规多极距中梯测深应用与研究多数局限于二维空间,其三维正反演一直是人们研究的热点。本文在四面体交错网格剖分基础上,采用有限单元法对球体等三维模型进行多极距中梯测深数值模拟计算。研究表明,三维数值模拟可有效反映模型的空间分布;在不增加太多工作量的情况下,实现高效体积测深;电阻率和极化率参数模拟相结合分析,模拟精度高,稳定性好;开展倾斜铜板、铜块水槽物理模拟,模拟结果较好反映了模型的空间及电性分布,验证了多极距中梯测深的可行性和正确性,为该方法的实际应用及后续的反演工作提供了重要依据。     

Geological - Geophysical - Geochemical Exploration Models of Copper - Iron Deposits in Southeastern Hubei1

Abstract This paper discusses geological - geophysical - geochemical models of such typical deposits as the Tieshan - type Fe-Cu deposit, the Tonglushan - type Cu - Fe deposit, the Yehuaxiang - type Cu deposit, the Jiguanzui-type Cu - Au deposit, and the Tongshankou - type Cu(Mo) deposit. The models were established based on practical data of the polymetallic deposits dominated by copper ore in southeastern Hubei. These models, which are graphically illustrated in the paper, systematically summarize the metallogenic geological conditions and the geophysical-geochemical characteristics of copper deposits in this area. The models are of practical significance for studying copper deposits, predicting mineral resources, choosing exploration methods, and searching for ore deposits based on existing ones in the study area.