贵州省乡镇国土资源电子政务建设方案探讨

本文从乡镇国土资源所业务需求分析出发,阐述了乡镇国土资源电子政务系统的总体结构,提出了乡镇国土资源电子政务建设方案,设计了数据库系统、数据交换系统、网络系统和应用系统的功能。     

赣中早第三纪镁铁质岩石的地质地球化学及其地质意义

赣中吉安-泰和白垩纪红盆中发育有大量的镁铁质岩石，呈岩墙、岩瘤等多种产状，野外穿插关系和全岩K-Ar法年龄(为49—65Ma，相当于古新世)均表明它们形成于早第三纪，微量元素以明显富集大离子亲石元素、中度富集高场强元素和轻稀土元素为特征，无明显的Nb和Ta负异常，同位素具有相对较低^87Sr／^86Sr(0．7041～0．7064)和较高^143Nd／^144Nd(εNd(T)= 0．8- 6．2)的特征。赣中古新世镁铁质岩石的地球化学特征表明它们与岛弧玄武岩明显不同，类似于洋岛玄武岩(OIB)。结合岩石的地质地球化学特征和区域地质发展史，认为赣中古新世镁铁质岩石的源区是EMⅡ型富集地幔和亏损地幔(DMM)混合，暗示古新世时太平洋板块对中国东南部的影响很弱，中国东南部自古新世初期进入大陆边缘的板内岩石圈伸展环境，岩石圈伸展与软流圈上涌有关。     

Geology and D-O-C Isotope Systematics of the Tieluping Silver Deposit,Henan, China: Implications for Ore Genesis

The Tieluping silver deposit, which is sited along NE-trending faults within the high-grade metamorphic basement of the Xiong‘er terrane, is part of an important Mesozoic orogenic-type Ag-Pb and Au belt recently discovered. Ore formation includes three stages: Early (E), Middle (M) and Late (L), which include quartz-pyrite (E),polymetallic sulfides (M) and carbonates (L), respectively. The E-stage fluids are characterized by δD=-90%c,δ^13CCO2=2.0‰ and δ^18O=9‰ at 373℃, and are deeply sourced; the L-stage fluids, with δD=-70‰, δ^13C CO2=-1.3%c and δ^18O=-2‰, are shallow-sourced meteoric water; whereas the M-stage fluids, with δD=-109‰, δ^13C CO2=0.1%c and δ^18O2‰, are a mix of deep-sourced and shallow-sourced fluids. Comparisons of the D-O-C isotopic systematics of the Estage ore-forming fluids with the fluids derived from Mesozoic granites, Archean-Paleoproterozoic metamorphic basement and Paleo-Mesoproterozoic Xiong‘er Group, show that these units cannot generate fluids with the measured isotopic composition (high δ^180 and δ^13C ratios and low δD ratios) characteristic of the ore-forming fluids. This suggests that the E-stage ore-forming fluids originated from metamorphic devolatilization of a carbonate-shale-chert lithological association, locally rich in organic matter, which could correspond to the Meso-Neoproterozoic Guandaokou and Luanchuan Groups, rather than to geologic units in the Xiong‘er terrane, the lower crust and the mantle. This supports the view that the rocks of the Guandaokou and Luanchuan Groups south of the Machaoying fault might be the favorable sources. A tectonic model that combines collisional orogeny, metallogeny and hydrothermal fluid flow is proposed to explain the formation of the Tieluping silver deposit. During the Mesozoic collision between the South and North China paleocontinents, a crustal slab containing a lithological association consisting of carbonate-shale-chert, locally rich in organic matter (carbonaceous shale) was thrust northwards beneath the Xiong‘er terrane along the Machaoying fault.Metamorphic devolatilization of this underthrust slab provided the ore-forming fluids to develop the Au-Ag-(Pb-Zn) ore belt, which includes the Tieluping silver deposit.     

Geochemistry and chronology of Se’ertengshan greenstone, Inner Mongolia

1Introduction TheSe’ertengshanregionissituatedonthenorth ernmarginoftheNorthChinaContinentalPlatform.In thelongpastdifferentresearchershaddifferentopin ionsonthemetamorphicseriesinthisregion.Regional geologicalsurvey(1∶200000onscale)(Compiling GroupofStratigraphicTablesfortheInnerMongolia AutonomousRegion,1978)hasdividedthemetamor phicseriesintheregionstudiedintotheWulashan Group,theWutaiGroup,theErdaowaGroupandthe SanhemingGroup.AccordingtotheGeologicalRe searchTeamofInnerM…     

Biostratigraphy of Triassic Marine Reptiles in Southwest Guizhou and Its Adjacent Area

This paper briefly reviews the Triassic marine reptile fossils in Guizhou Province, especially the fossils that have been recently found in the Guanling area. Based on three sections at Guanling and Xingyi, Guizhou Province and Luoping, Yunnan Province, four horizons with vertebrate fossils are recognized in the Middle and Upper Triassic of this area; They are from bottom to top: Member I and Member II of the Guanling Formation, and the Zhuganpo Member and the Wayao Member of the Falang Formation.     

有机—铜配合物热稳定性及热分解产物的实验研究

通过实验研究了富里酸、氨基丙酸和半胱氨酸３种有机质与铜的配合物的热稳定性及热分解产物特征。结果表明：富里酸—铜配合物在１９０～２００℃时缩合成类干酪根物质，被富里酸配合的铜一同进入到该物质中去；氨基丙酸—铜配合物在１４０～１５０℃分解，形成π键配合物“二（三）氯·（乙炔）合铜（Ⅰ）”；半胱氨酸—铜配合物很不稳定，８０℃便开始分解，生成黑色沉淀物“二水合四氯合铜酸铵”，而没有生成铜的金属硫化物     

高压下滑石的脱水实验研究

本实验由等化学计量的混合氧化物在高温高压下合成滑石之后,使温度继续升高,同时测定了不同压力下滑石的脱水温度、获得了合成滑石的脱水温度与压力的线性关系式: T_A(℃)=431.4+5.3P(k bar)。 此外,在30k bar和约900℃条件下,用Mg/Si比为1(原子比)的混合氧化物合成了三个含水镁硅酸盐新矿物相A,B,C。这三个相的红外光谱比滑石多886cm~(-1)和614cm~(-1)两个吸收峰,而且它的水区与滑石的水区有很大差别。     

河南不同成因类型铝土矿的矿石特征

本文在对铝土矿石物质组成研究的基础上,运用电子显微镜(EM)对河南两类不同类型铝土矿床的矿石结构进行了观察研究。根据EM观察到的铝土矿石显微结构的不同形貌特征,划分出三种矿石结构类型:致密-隐晶结构、粒状镶嵌结构和粒屑结构。由此归结为两个成因类型:古风化壳异地堆积亚型和古风化壳原地堆积亚型的铝土矿床。     

透闪石,滑石拓扑定向反应—龙溪软玉的电子衍射研究

通过对龙溪软玉中矿物纤维所进行的电子衍射研究,发现了透闪石针状晶体中存在众多(010)多链层错,透闪石和滑石以(010)为晶界面形成连生,以及滑石晶体呈纤维状存在;探讨了透闪石退变质为滑石的反应运动学和反应动力学机制;提出了拓扑定向反应系列的理论。     

包裹体类型和成分特征在油气运移研究和油气储层评价中的应用——以赤水气田为例

包裹体类型和成分的不同,反映了油气的不同演化程度和不同运移期次。赤水地区二叠系、三叠系储层中有各种盐水包裹体和烃类包裹体。论述了不同世代胶结物中包裹体的类型特征和成分特征,及它们的划分标志。依据单个包裹体激光拉曼光谱测定数据,得出常规的包裹体中“甲烷基本浓度”,以及本次提出的甲烷/总有机组分含量比值和烷烃/总有机组分含量比值,并由此分析油气运移特征和进行储层评价。分析认为,在同一块岩样中,若存在两种以上明显的不同演化程度、不同有机组分的多种类型包裹体,则说明本区具有两次以上的油气运移。有利的油气储集层段应有较多的油气初次运移和二次运移的烃包裹体,尤其应有反映油气最终演化的有机组分标志。