伽师铜矿控矿因素与成矿模式分析

伽师铜矿位于塔里木盆地西北缘,南天山西段南麓,属于柯坪塔格背斜南翼,矿体产于早新世的一套灰绿色砂岩中。矿床的形成受到地层、沉积环境、构造、古气候、氧化还原条件等多方面因素影响,形成了特有的成矿模式。     

惠水摆金剖面沉积相分析

位于黔南贵州惠水县摆金村剖面,露头发育良好,层序较完整,作为分析黔中隆起及周缘石炭系层序地层及沉积相的典型剖面.识别出了7个层序界面,从而将该剖面划分为6个完整的三级层序.CSQ1沉积相为三角洲相,而CSQ2到CSQ3沉积相就从浅海陆棚逐渐向台地相过渡,CSQ5、CSQ6又由局限台地相到开阔台地相过渡,反映出海平面由浅变深的过程.总结出惠水地区石炭系沉积模式为三角洲-碳酸盐台地混合模式.     

银根-额济纳旗及邻区石炭-二叠纪碳酸盐岩的沉积特征及其地质意义

从碳酸盐岩的岩石学、建造特征的分析入手,研究了区内石炭-二叠纪碳酸盐岩的沉积特征及其地质意义.野外凋查表明,本区域石炭-二叠纪碳酸盐岩以砾屑灰岩、海百合灰岩和微晶灰岩为主,块状构造和粒序层理常见,作为碳酸盐岩建造底座及夹层的火山岩或火山碎屑岩发育,显示了本区域石炭-二叠纪期间张裂频繁、火山作用强烈、地形较陡和覆水较深的浅海古地理背景.本区域石炭一二叠纪碳酸盐岩建造发育于火山岩或火山碎屑岩、辫状三角洲或扇三角洲砂砾岩、海岸泥岩和陆架泥岩等底座之上,分别形成了火山抬高型(VEF)、二角洲垫高型(DEF)、海岸/降起沉没型(CSF/USF)和陆架变浅型(SSF)4种碳酸盐岩建造.不同类型的碳酸盐岩建造,是区域构造和海平面升降联合作用的产物,但其形成机制有别,其中,火山垫高型建造最普遍,含火山岩或火山碎屑岩夹层,系区域海平面长期上升的背景下,构造张裂引发的火山喷发引起相对海平面下降的产物;三角洲垫高型建造分布也较广,含砂砾岩夹层,为区域海平面长期上升的背景下,构造抬升造成辫状三角洲或扇三角洲进积导致相对海平面下降形成;海岸/隆起淹没型和陆架变浅型建造为纯灰岩建造,相对较少,则是在区域构造稳定的构造背景下,短期相对海平面变化驱动的结果.然而,不同类型碳酸盐岩建造的沉积特征,则受沉积环境制约.同时,针对这4种不同的碳酸盐岩建造,分别建立了火山垫高型碳酸盐台地(VEP)、三角洲垫高型碳酸盐台地(DEP)、海岸/隆起淹没型碳酸盐缓坡(CSR,USR)和陆架变浅碳酸盐缓坡(SSR)4种沉积模式,不同的沉积模式形成了沉积特征有别的碳酸盐岩建造.该时期浅海陆棚的古地理背景,不仅为区内海相烃源岩的发育创造了良好的古地理条件,也使得这一时期的碳酸盐岩、底座火山岩或火山碎屑岩、辫状三角洲或扇三角洲砂砾岩,以及碳酸盐岩建造中的火山岩、火山碎屑岩和砂砾岩夹层,成为本区域石炭一二叠纪的潜在油气储层.     

探讨新疆大平梁铜矿地质特征与矿床成因

大平梁铜矿是新疆鄯善县近年来发现的一重要的铜矿床,其大地构造位置处于塔里木～华北板块(Ⅰ)塔里木微板块(Ⅱ)库鲁克塔格早古生代前陆盆地。元古宇与下古生界地层在区域上广泛发育,古元古界由双模式变质火山岩组成,部分火山岩及碳酸盐碎屑岩构成中新元古界地层,火山岩及火山碎屑岩共同组成震旦系地层。下古生界浅海相碳酸盐岩、陆源碎屑岩岩层平行不整合覆盖其上。褶皱复式向斜构造是区内的主要构造特征,位于库鲁塔格早古生代前陆盆地内,帕尔干断裂以及兴地塔格断裂对其南北两侧进行控制,加里东晚期侵位的帕尔干岩体是区内的主要岩浆岩。下文对新疆大平梁铜矿地质特征展开分析,并探讨其矿床成因,以供参考。     

甘肃肃北红柳沟铁矿成因分析及找矿方向

矿区地处塔里木陆块区,敦煌陆块,柳园裂谷东部。出露地层为太古界-古元古界、古生界、中生界、新生界。侵入岩以加里东期、华力西期侵入岩为主。控矿构造以东西向、北西西向为主。矿床表现出明显的同生沉积特征。     

川东南-湘西地区志留系小河坝组砂岩中重矿物特征及地质意义

沉积物中重矿物的分布受物源区、构造抬升与剥蚀作用、古地貌以及古气候、古环境等多种因素影响,因此可将重矿物的研究应用于物源、沉积环境的分析.通过对川东南-湘西地区下志留统小河坝组砂岩重矿物的相关分析,提出川东南与湘西地区小河坝组砂岩的物源方向不同,川东南小河坝组砂岩的物源方向为由南东到北西,即来源于雪蜂山隆起的南西段;湘西小河坝组砂岩的物源方向为由东北到西南,即来自雪峰山隆起的北东段.重矿物组合表明川东南地区的物源主要由古老的沉积岩再旋回沉积物、基性-超基性侵入岩体和中基性喷出岩构成;湘西地区的物源主要为更老的沉积岩及其所夹少量中基性喷出岩,总体形成于稳定物源的构造沉积环境.砂岩中的指相重矿物黄铁矿和赤(褐)铁矿特征及其分布反映了小河坝组砂岩沉积期靠近黔中隆起和雪峰山隆起为水体较浅的氧化环境,而在川东南存在南川和秀山-沿河2个深坳区,为深水还原环境.     

四川旺苍志留系鲕粒灰岩特征及地质意义

近期在川西北旺苍地区早志留世南江组中首次发现了鲕粒灰岩.它们多以10cm左右的薄层夹持在页岩或粉砂质泥岩中,沉积相分析显示该段地层总体应属于均斜缓坡沉积体系.说明这些鲕粒是由异地搬运而来,在旺苍附近可能会存住相当规模的鲕粒滩.在显微镜下可观察到,其中的鲕粒类别单一,鲕粒紧密排列.并呈现一定程度的压缩变形,局部壳层呈锯齿状,也指示这些鲕粒曾经历过高能分选和搬运,以及压实成岩作用等.氧碳同位素测试显示,这些鲕粒灰岩沉积时的古温度大体为25～31℃,表明早志留世的上扬子地台应处于中低纬度干热或温暖的古气候带.除去古气候及占地理学方面的意义,当前鲕粒灰岩的发现还为该区油气勘探提供了重要的储层信息.     

新疆和硕县恩得利达坂铜矿控矿因素及矿床成因浅析

恩得利达坂铜矿赋存于晚泥盆世混源序列中粒黑云母二长花岗岩内,且多见早志留世尼勒克河组地层残留体,前者为成矿提供了充足的热源,后者为成矿奠定了丰富的矿质基础。矿体北东侧北西向断裂及其次级构造破碎带为含矿热液活动、运移及矿质富集、沉淀提供了通道和场所,初步分析认为恩得利达坂铜矿成因类型为中～低温岩浆热液型。     

库牙克北部四连岩体锆石U-Pb定年及地球化学特征

沿库牙克断裂侵入的四连岩体,通过锆石LA-MC-ICP-MS U-Pb测年对其年龄进行测定,共获得5组处于晚奥陶世-早志留世之间。岩石类型主要为花岗闪长岩及黑云母花岗岩,岩石为钙碱性岩石,通过构造图解显示岩石类型为碰撞造山型中酸性岩浆岩。     

宁夏香山地区弧形挤入推覆构造带特征及演化规律探讨

宁夏香山地区作为早古生代贺兰裂谷的一部分,自早奥陶世马家沟组台地碳酸盐岩沉积至中—晚奥陶世米钵山组、香山群裂谷型一套巨厚的碎屑岩夹碳酸盐岩、硅质岩类复理石沉积,代表华北板块南缘被动大陆边缘浅水台地—裂陷槽沉积。志留纪末的加里东运动揭开了香山褶皱造山带的序幕。华力西期造山带北缘发展为前陆盆地,广泛沉积了泥盆系—石炭系。后经华力西—印支运动的褶皱逆冲作用及燕山运动逆冲推覆作用强化,造山带基本定型,并发展为一大型前陆逆冲推覆构造带。燕山运动、喜马拉雅运动在造山带前缘及其两侧再次活化,促使褶皱逆冲推挤进一步加剧,形成弧形挤入推覆构造带。     

Voices of fear and anxiety and sadness and depression: The effects of speech rate and loudness on fear and anxiety and sadness and depression.

Two studies investigated the role of expressive vocal behavior (specifically, speech rate and loudness) in fear and anxiety and in sadness and depression. In the 1st study, participants spoke about personally experienced fear and anxiety-arousing and neutral events using 3 different voice styles: fast and loud, normal, and slow and soft. In the 2nd study, participants spoke about personally experienced sad or depressing and neutral events using the same 3 voice styles. In both studies, the participants' highest levels of subjective affective and cardiovascular (CV) arousal occurred when they spoke about the emotional events in a mood-congruent voice style: fast and loud in the case of fear and anxiety, and slow and soft in the case of sadness or depression. Mood-incongruent voice styles canceled the heightened levels of CV arousal normally associated with these negative emotions. The voice-style manipulation had no significant effect on the participants' levels of CV arousal during the neutral discussions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Synthesis and analysis of mixed chlorinated-fluorinated dibenzo-p-dioxins and dibenzofurans and assessment of formation and occurrence of the fluorinated and chlorinated-fluorinated dibenzo-p-dioxins and dibenzofurans

Despite the use of multimodal therapy, higher-grade glioma is still uniformly fatal in the adult population. There is a considerable difference between the length of survival in each given patient, even within the same tumor type and malignancy grade group, suggesting that there are factors that might differentially influence outcome. To identify such factors, 107 patients with anaplastic or malignant glioma were retrospectively investigated. Clinical parameters and paraclinical data on the p53, mdm2, and EGFR genes at the DNA or protein level were evaluated by univariate analysis and Cox proportional hazards regression modeling. Kaplan-Meier survival estimation demonstrated that immunohistochemical positivity for mdm2 protein in patients with anaplastic astrocytoma or with glioblastoma multiforme was associated with a shorter survival time (p = 0.02). P53 gene mutations and immunopositivity for the epidermal growth factor receptor (EGFR) protein were not significantly related to poor prognosis. The Cox proportional hazards model revealed immunohistochemical positivity for p53, mdm2, or for both of them, the presence of postoperative irradiation, and the extent of surgical resection of tumor to be variables significantly associated with prolonged survival. EGFR overexpression, age over 60 years, and Karnofsky performance score below 40 points did not significantly shorten survival time. In conclusion, the present study identified immunohistochemically detected mdm2-protein overexpression as a statistically significant negative prognostic parameter in patients bearing anaplastic or malignant glioma. Association analysis of variables revealed a possible correlation between mdm2 and p53, which is also consistent with the biological interaction mode of both proteins in vivo.     

Sexuality and aging--usual and successful

BACKGROUND: As aging research increasingly reflects an effort to dissociate true time-driven changes from those that can be improved, sexuality in later life remains largely unexplored. Several problems are evident. There is a lack of normative data, a lack of a conceptual framework relating to the biology, psychology, and sociology of sex, and an attitudinal resistance that obscures the entire topic. METHODS: We conducted a three-part instructional series on major topics involved with sexuality and aging. We surveyed our group of attendees (n 158, average age 68 for males, 65 for females) before and after the series. RESULTS: A remarkably robust sex life was evidenced by both the men and the women, even until advanced old age. Yet, a substantially decreased involvement was reported from 10 years earlier. Despite current activities, people of both sexes wished they were participating even more than they currently were. Impotency was identified as the major negative feature for the men; relationship problems were for the women. A questionnaire 6 months after the series reported improved sexual attitudes, but no change in sexual activities from the earlier survey. CONCLUSION: Sexuality is a major quality-of-life issue which persists into old age. Our study showed that the usual sexual practices reported by our group were not considered by them to be ideal. The intervention of this instructional series provided improved sexual attitudes but not performance. Additional studies are encouraged.     

Spondylolysis and spondylolisthesis and sports

Spondylolysis and spondylolisthesis occur predominantly in the lower lumbar spine. Besides congenital defects such as predisposition of spondylolysis the correlation between competitive sports activities and an increased incidence of spondylolysis is proved. In early stages, complete healing can be achieved by conservative treatment (abstinence from sports activities for 3 months, orthesis). Persistence of pain, neurologic symptoms and progression of vertebral slipping are indications for operative treatment (reconstruction of the isthmus, dorso-ventral spondylodesis). The exercise tolerance depends on the extent of instability, progression of vertebral slipping and clinical symptoms. The limits of exercise tolerance vary among the individual athletes and require the decision of the physician. Backstroke swimming, abdominal and back muscle strengthening exercises, and types of sport involving smooth movements are advisable. Sports education in school is possible without restriction in patients with stable spondylolysis and in those with spondylolisthesis without unfavourable concomitant factors.     

Larks and owls and health, wealth, and wisdom

OBJECTIVE: To test the validity of Benjamin Franklin's maxim "early to bed and early to rise makes a man healthy, wealthy, and wise." DESIGN: Cross sectional analysis of sleeping patterns in a nationally representative group of elderly people, and longitudinal investigation of mortality. SETTING: Eight areas in Britain (five in England, two in Scotland, and one in Wales). SUBJECTS: 1229 men and women aged 65 and over who in 1973-4 had taken part in a survey funded by the Department of Health and Social Security and for whom data on sleeping patterns, health, socioeconomic circumstances, and cognitive function had been recorded. MAIN OUTCOME MEASURES: Self reported income, access to a car, standard of accommodation, performance on a test of cognitive function, state of health and mortality during 23 years of follow up. RESULTS: 356 people (29%) were defined as larks (to bed before 11 pm and up before 8 am) and 318 (26%) were defined as owls (to bed at or after 11 pm and up at or after 8 am). There was no indication that larks were richer than those with other sleeping patterns. On the contrary, owls had the largest mean income and were more likely to have access to a car. There was also no evidence that larks were superior to those with other sleeping patterns with regard to their cognitive performance or their state of health. Both larks and owls had a slightly reduced risk of death compared with the rest of the study sample, but this was accounted for by the fact that they spent less time in bed at night. In the study sample as a whole, longer periods of time in bed were associated with increased mortality. After adjustment for age, sex, the presence of illness, and other risk factors, people who spent 12 or more hours in bed had a relative risk of death of 1.7 (1.2 to 2.5) compared with those who were in bed for 9 hours. The lowest risk occurred in people who spent 8 hours in bed (adjusted relative risk 0.8; 0.7 to 1.0). CONCLUSION: These findings do not support Franklin's claim. A "late to bed and late to rise" lifestyle does not seem to lead to socioeconomic, cognitive, or health disadvantage, but a longer time spent in bed may be associated with increased mortality.     

Craniometaphyseal and craniodiaphyseal dysplasia, head and neck manifestations and management

Mechanical allodynia (MA) following hand injury is a well-documented clinical problem. The purpose of this pilot study was to examine the relationship between hand MA and the upper limb tension test (ULTT). The ULTT mechanically stresses the neural structures from the C5/6/7 neural foramina to the median nerve distally. This study examined 29 subjects with unilateral hand MA before and after a 2-week neural self-mobilization programme. There was a significant difference between the subjects' affected and unaffected sides when tested using the ULTT, both in reproduction of symptoms and in reduced range of motion of the ULTT. Following the self-mobilization program, there was an improvement in the range of the ULTT, and subjects reported a reduction in their symptoms. Complete recovery was not obtained in all cases. The results of this study suggest that the ULTT is a useful tool both in assessment and treatment of subjects with hand MA.     

深云立交桥梁检测及加固改造

根据深云立交桥梁的检测结果，对该桥目前的整体状况、工作状态，及其使用情况做出综合评价，对桥的病害原因进行了分析，并提出合理的加固方案。     

关于摩尔浓度及其与硬度转换关系问题的讨论

众所周知，国际单位制物质的量采用摩尔(mol)表示，近几年出版的给排水专业书籍，为了与国际单位制接轨，逐渐将摩尔的使用频率不断提高，被给排水技术人员广泛应用的新版给排水设计手册，将表示物质浓度的单位“当量／升”或“毫克当量／升”．改为mol／l或mmol／l，虽然编者对其基本单元定义作了说明，但在实际运用上仍会出现误解，     

《儿子与情人》的语码转换与男女二元对立

劳伦斯小说《儿子与情人》一个鲜明的语言特色就是标准英语和当地方言频繁的语码转换。莫瑞尔用方言来对抗妻子,而妻子坚持用标准英语,偶尔也用方言来讽刺、挖苦丈夫。语码转换反映了劳伦斯男女二元对立的哲学思想。