用动态重结晶石英颗粒的分形确定变形温度及应变速率

韧性变形岩石中动态重结晶石英颗粒边界形态具有自相似性，表现出分形特征。动态重结晶石英颗粒边界的分形维数随温度的升高而减小，随应变速率的增加而增大，可作为韧性变形温度及应变速率的标度计。适合重结晶石英边界分维值的计算方法有封闭折线法和面积周长法。鲁西青邑韧性剪切带中糜棱岩动态重结晶石英颗粒边界具有自相似性，分维值为1.228～1.326，初步估算出古应变速率为10     

川西北微细浸染型金矿床石英脉及其特征

川西北地区是我国主要的微细浸染型金矿化集中区之一，产有马脑壳等20余处重要金矿床（点），研究表明，区内此类放床范围内常发育我种类型的石英脉体，其中黄铁矿－毒砂－石英脉，石英－辉锑矿脉及石英－雄（雌）黄脉与金矿化关系密切，是主要金矿化阶段产物，它们在空间上多分布于矿化带范围，其发育程度在一定意义上指示金矿化作用的强度，因而构成区内该类金矿床找矿评价的重要宏观标志，流体包裹体研究表明，上述类型的石英脉主要形成于温度为170－210度及盐度（NaCl)为4％－11％，的热液条件下，其热液气相成分中w(CO2）／w(H2O)比值一和肌变化于0．240－0．491，石英红外吸收光谱相对光密度D（H2O）／D（CO2）值一般小于8．0，与其他类型石英脉具明显区别，因而上述参数值构成了该区金矿床找矿评价的重要石英脉微观标志。     

Paleostress orientation from 3-D orientation distribution of microcracks in quartz from the Cretaceous granodiorite core samples drilled through the Nojima Fault, south-west Japan

Abstract The orientations of both healed extension microcracks and microcracks in quartz grains sealed mostly by carbonate minerals were measured from Cretaceous granodiorite core samples drilled along the Nojima Fault, southwest Japan. The preferred orientations of both healed and sealed microcracks consist of approximately three orthogonal sets, (components) A, B and C, in which A strikes NS–NW-SE and dips vertically, B strikes EW–NE-SW and dips vertically, and C is subhorizontal. Both the healed and sealed microcracks were possibly formed by hydraulic fracturing, and the successive release of tensile stress due to pore fluid overpressure in the principal stress directions could have caused this microcracking in mutually orthogonal directions. The quartz grains are also very moderately plastically deformed, which is indicated by the occurrence of kink bands and undulose extinction. The association of healed microcracks and kink bands in the quartz suggests that these microstructures formed under subgreenschist facies conditions (≈300°C) during hydrothermal activity that could have occurred immediately after the emplacement of granodiorite during the Late Cretaceous period. Based on both the preferred orientation of microcracks, and c-axis fabrics of kinked and unkinked grains (so called kink method), it is inferred that the σ₁-and σ₃-axis were oriented horizontally in NS–NW-SE and EW–NE-SW directions, respectively. The inferred paleostress field does not conform to the east–west-trending compression during the Quaternary period, but to the activation of EW–NE-SW-trending, left–lateral strike–slip faults during the Late Cretaceous period in southwest Japan.     

东伙房金矿中黄铁矿和石英的某些标型特征及其找矿意义

主要对黄铁矿及石英的某些标型特征进行研究，并推测成矿的有利部位，研究发现，本区成矿阶段的黄铁矿为ｎ＋ｐ混合型，ｐ型含量愈高，矿化愈好，金品位高值区与热电系数标志值５００～７００部位吻合，主成矿阶段出现（１００）＋（３２１）＋（２１０）＋（３２１）及（１００）＋（２１０）＋（１１１）黄铁矿聚形，石英热发光强度大（大于０．５Ｒ）发光曲线峰多（双峰），总积分强度大于４．３Ｒ是本区主成矿阶段的一个标志。     

瑶岗仙钨矿床的晶洞特征及其研究意义

瑶岗仙黑钨矿床石英脉的地质特征、晶洞类型、含晶标志，分布规律以及晶洞发育的控制因素研究表明，矿区第Ⅱ成矿期矿脉的晶洞规模，分布、优美晶体、晶簇天然观赏矿物的成生，具有一定的理论，经济研究意义。     

湖北省随州市北部变质岩中石英的找矿矿物学

湖北省随州市北部的变质岩中，发育有不同期的矿化与非矿化石英脉。本文通过对石英的电子顺磁共振谱、热发光曲线及中子活化分析结果的研究，系统探讨了不同时代及产状石英的差异及其与金矿化之间的关系。指出石英晶格中出现Ｆｅ￣（３＋）杂质，Ａｌ－Ｏ￣－心自旋浓度大于１．３×１０￣（１４）ｓｐｉｎｓ／ｍｇ、有Ａｕ和Ａｇ检出且Ｋ／Ｎａ值大于３，其所在蚀变带为含矿蚀变破碎带。     

Quartz Cement in Middle Jurassic Reservoir Sandstones in North Sea. A Review. Part Ⅰ: Occurrence and Character

Quartz cementation is a very important diagenetic event and main porosity-occluding factor in the reservoir sandstones in middle Jurassic i n North Sea. Petrological studies indicate the quartz cementation is limited in shallower burial depth and increases significantly at depth around 3.5 - 4 km. T he amount of quartz cement increases with burial depth from an average of approx imately 4%-5 vol% at 2.5 km to 17%-20 vol% at 4 km. Highest abundances of quartz cement exceeds 28% which has been found in the Ness Formation. Variations in qu artz cementation between different sandstone facies is minimal for any one forma tion, with exception of the generally lower quantities present in the heterolith ic sandstone. Homogenisation temperatures of fluid inclusion in quartz overgrowt h from the North Sea reservoirs indicate that few quartz cement occur below the temperature 70 ℃～80 ℃, the onset of large volume quartz cement starts at the temperatures higher than 90 ℃ which suggests the quartz cementation is temperat ure - dependent during progressing diagenesis of sandstones.     

山东界河金矿中石英的找矿矿物学

通过对界河金矿中石英的成分、晶胞参数、天然热发光、红外谱、包裹体、同位素、矿物学填图的研究，表明其石英富含Ａｌ、Ｋ、Ｎａ其ａ＿０、ｃ＿０大于理论值；其天然热发光具多峰，并且由Ⅰ到Ⅲ成矿阶段强度增大；由无矿到富矿，其红外谱相对光密度Ｄ＿２／Ｄ＿１变大；其包裹体富含Ｋ、ＮａＣｌ、Ｆ、ＣＯ＿２、Ｈ＿２Ｏ，ｐＨ＝７．０８－７．１３，Ｅｈ＝－６．１－－６．２Ｖ；其氧同位素变化范围小；其热发光积分强度填图显示矿体向深部变大，并分枝。用上述研究方法预测了几个矿体，其中的一个矿体已被证实。