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26篇 您的检索式:作者名="David Groves"
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1The characteristics, origins, and geodynamic settings of supergiant gold metallogenic provinces显示文摘There are six distinct classes of gold deposits, each represented by metallogenic provinces, having 100’s to > 1 000 tonne gold production. The deposit classes are: (1) erogenic gold; (2) Carlin and Carlin-like gold deposits; (3) epithermal gold-silver deposits; (4) copper-gold porphyry deposits; (5) iron-oxide copper-gold deposits; and (6) gold-rich volcanic hosted massive sul-fide (VMS) to sedimentary exhalative (SEDEX) deposits. This classification is based on ore and alteration mineral assemblages; ore and alteration metal budgets; ore fluid pressure(s) and compositions; crustal depth or depth ranges of formation; relationship to structures and/or magmatic intrusions at a variety of scales; and relationship to the P-T-t evolution of the host terrane. These classes reflect distinct geodynamic settings. Orogenic gold deposits are generated at mid-crustal (4-16 km) levels proximal to terrane boundaries, in transpressional subduction-accretion complexes of Cordilleran style erogenic belts; otherRobert Kerrich Richard Goldfarb David Groves Steven Garwin 2000Science China Earth Sciences2000,43,S1:249
2哈达门沟金矿床成岩成矿时代的定点定年研究显示文摘哈达门沟大型钾长石 -石英脉型金矿床位于华北地台北缘西段的乌拉山地区。矿区西部的大桦背花岗岩和矿区内的伟晶岩脉与金矿化均具有较为密切的空间关系 ,这导致不少研究者认为哈达门沟金矿床与大桦背岩体或伟晶岩之间也具有时间和成因联系。通过采用先进的高灵敏的高分辨率的离子探针 (SHRIMP)对大桦背岩体、伟晶岩脉和钾长石化蚀变岩进行的锆石 U- Pb定点定年研究表明 :伟晶岩脉形成于 (1836± 5)× 10 6a,属吕梁旋回 ;大桦背岩体形成于 (353± 7)× 10 6a,应为海西旋回早期产物 ;金矿化年龄小于或等于 (132± 2 )× 10 6a,应为燕山晚期。这些年龄结果说明 ,本区金矿化比大桦背岩体晚至少 2 2 0× 10 6a,这排除了金矿化与大桦背岩体和伟晶岩脉之间有任何成因联系的可能性。蚀变岩的年龄还证明 ,虽然乌拉山和胶东地区金矿床的围岩和年龄不同 ,但两地区的金矿化却几乎同时发生。此外 ,大桦背岩体的形成年龄与华北地块和蒙古古陆块碰撞作用发生的时间基本一致 ,因此大桦背岩体的 SHRIMP年龄为这一碰撞作用提供了可靠的年代学证据。苗来成 Yumin Qiu 关康 Neal M cNaughton 裘有守 罗镇宽 David Groves 2000矿床地质2000,19,2:48
3内蒙古乌拉山地区大桦背岩体SHRIMP锆石U-Pb年代学研究显示文摘大桦背花岗岩体位于内蒙古乌拉山地区,东距哈达门沟大型钾长石—石英金矿床约5km。前人对该岩体曾做过不少同位素年代学研究,所得结果相差较大,但是多数研究者认为大桦背岩体与区内金矿化具有成因联系。本文采用先进的高灵敏、高分辨率的离子探针(SHRIMP)对大桦背岩体进行了锆石U-Ph定点定年研究。结果表明,大桦背岩体的形成年龄为353±7Ma,应为海西旋回早期产物。此年龄比已得到的乌拉山金矿区成矿年龄大至少70Ma,因而推测大桦背岩体与金矿化之间不存在直接的成因联系。苗来成 Yumin QIU 关康 Neal McNAUGHTON 裘有守 罗镇宽 David GROVES 2001地质论评2001,47,2:34
4SPIRIT 2013声明:定义临床研究方案的标准条目显示文摘临床研究方案是临床研究设计、实行、报告和评价的基础。然而,临床研究方案及现存的临床研究方案指引在内容和质量上差异很大。本文描述了《规范临床研究方案内容》(Standard Protocol Items:Recommendations for Interventional Trials 2013 ),简称SPIRIT2013声明,一个临床研究方案必须报告的条目指引的系统建立和范围。An-Wen Chan Jennifer M.Tetzlaff Douglas G.Altman Andreas Laupacis Peter C.GΦtzsche Karmela Krleza-Jeri AsbjΦrn Hróbjartsson Howard Mann Kay Dickersin Jesse A.Berlin Caroline J.Doré Wendy R.Parulekar William S.M.Summerskill Trish Groves Kenneth F.Schulz Harold C.Sox Frank W.Rockhold Drummond Rennie David Moher 钟丽丹 郑颂华 吴泰相 李幼平 商洪才 张伯礼 唐旭东 吕爱平 卞兆祥 2013中国循证医学杂志2013,13,12:23
5The giant Kalgoorlie Gold Field revisited显示文摘The Neoarchaean Kaigoorlie Gold Field contains the giant Golden Mile and world-class Mt Charlotte deposits,which have been the subject of much research for over 100 years.The Golden Mile deposit is a complex array of ductile to brittle vein and breccia lodes that are predominantly hosted in the highlyfractionated Golden Mile Dolerite sill.The Fimiston lodes comprise an array of narrow lodes that evolved broadly syn- to late-formation of the regional D2 NW-trending foliation.The lodes are characterized by pyrite veinlets and disseminations,quartz veinlets and breccias,and banded quartz-carbonate veins with sericite,carbonate,and pyrite-dominated alteration.Bonanza Green-Leader,or Oroya-style,lodes,with grades in excess of 1000 g/t Au,are similar to the Fimiston-style lodes,but are characterized by abundant visible gold,native tellurium and more abundant telluride minerals within roscoelitebearing alteration zones.The arguably structurally younger Mt Charlotte-style lodes are characterized by a pipe-shaped,coarse-grained quartz,carbonate and scheelite vein-stockwork with distinct verticallyzoned,carbonate-sericite-albite-pyrite ± pyrrhotite dominant alteration assemblages around veins within Unit 8 of the Golden Mile dolerite and porphyry dykes.The network of steep- and gently-dipping extension and shear fracture-fill veins are associated with NE-trending fault sets that cross cut the regional NW-trend.The deposit area is intruded by swarms of porphyry dykes,including syn-volcanic mafic dykes,early and volumetrically most significant c.2.67 Ga feldspar-phyric porphyry dykes,as well as later c.2.66-2.65 Ga calc-alkaline hornblende-phyric dykes associated with younger c.2.65-2.64 Ga lamprophyre dykes.All post-volcanic dykes have similar orientations to the Fimiston lodes.The feldspar dykes are clearly overprinted by all styles of mineralization,although the relationship between hornblende-phyric and lamprophyre dykes and gold mineralization is more ambiguous.Most agree that gold mineralization was post-peak regional metamorphism of host rocks,although its relative structural timing is controversial.Direct timing constraints on gold mineralization indicate that Fimiston- and Mt Charlotte-style mineralization formed within a relative short period of time around 2.64 Ga,and,as such,support a model of progressive deformation of a Theologically heterogeneous rock package late in the structural history.Fluid characteristics,combined with the structural,metamorphic and absolute timing,support description of gold mineralization at the Golden Mile as orogenic and mesozonal,and this allows direct correlation with orogenic gold deposits worldwide,which classically formed during accretion along convergent margins throughout Earth history.Noreen Mary Vielreicher David Ian Groves Neal Jesse McNaughton 2016Geoscience Frontiers2016,7,3:3
6The Phalabowra (Palabora) carbonatite-hosted magnetite–copper sulfide deposit, South Africa: an end-member of the iron-oxide copper–gold–rare earth element deposit group?显示文摘David I. Groves Noreen M. Vielreicher 2001Mineralium Deposita2001,,2:1
7Aplasia cutis congenita:clinical management of a rare congenital anomaly显示文摘Bharti G Groves L David LR 2011J Craniofac Surg2011,22,1:1
8Aplasia cutis congenita:clinical management of a rare congenital anomaly显示文摘Bharti G Groves L David LR 2011J Craniofac Surg2011,22,1:1
9Prevalence and Morphology of Pouch and Ileal Adenomas in Familial Adenomatous Polyposis显示文摘Christopher J. Groves Iain G. Beveridge David J. Swain Brian?P. Saunders Ian C. Talbot R. John Nicholls Robin K. Phillips 2005Diseases of the Colon & Rectum2005,,4:1
10Diet and Stomach Cancer Risk in Warsaw, Poland显示文摘Jolanta Lissowska Mitchell H. Gail David Pee Frank D. Groves Leslie H. Sobin Anna Nasierowska-Guttmejer Elzbieta Sygnowska Witold Zatonski William J. Blot Wong-Ho Chow 2004Nutrition and Cancer2004,,2:1
11显示文摘Yumin Qiu David I. Groves Neal J. McNaughton Liang-gen Wang Taihe Zhou 2002Mineralium Deposita (-)2002,,3:1
12Large Villous Adenomas Arising in Ileal Pouches in Familial Adenomatous Polyposis: Report of Two Cases显示文摘Iain G. Beveridge M.R.C.P. David J. W. Swain R.N. Chris J. Groves M.R.C.P. Brian P. Saunders M.R.C.P. Alastair C. Windsor F.R.C.S. Ian C. Talbot F.R.C.Path. R. John Nicholls F.R.C.S. Robin K. S. Phillips F.R.C.S 2004Diseases of the Colon & Rectum2004,,1:1
13Multiple effects of silymarin on the hepatitis C virus lifecycle显示文摘Jessica Wagoner Amina Negash Olivia J. Kane Laura E. Martinez Yaakov Nahmias Nigel Bourne David M. Owen Joe Grove Claire Brimacombe Jane A. McKeating Eve‐Isabelle Pécheur Tyler N. Graf Nicholas H. Oberlies Volker Lohmann Feng Cao John E. Tavis Stephen J. 2010Hepatology2010,,6:1
14显示文摘Yumin Qiu David I. Groves Neal J. McNaughton Liang-gen Wang Taihe Zhou 2002Mineralium Deposita (-)2002,,3:1
15Analysis of breath volatile organic compounds as a noninvasive tool to diagnose nonalcoholic fatty liver disease in children显示文摘Naim Alkhouri Frank Cikach Katharine Eng Jonathan Moses Nishaben Patel Chen Yan Ibrahim Hanouneh David Grove Rocio Lopez Raed Dweik 2014European Journal of Gastroenterology & Hepatology2014,,1:1
16Aplasia chris conganita: clinial management of a rare congenital anomaly 显示文摘Bharti G Groves L David LR 2011J Craniofac Surg2011,22,1:1
17Origin of calc-alkaline series lavas at Medicine Lake Volcano by fractionation, assimilation and mixing显示文摘Timothy L. Grove David C. Gerlach Thomas W. Sando 1982Contributions to Mineralogy and Petrology1982,,2:1
18Geochronology and Significance of Granites Associated with Gold Deposits in the Jidong Area, China显示文摘The Jidong area is located on the north margin of the North China craton. It is a nucleus composed of the oldest rocks in China. Precambrian metamorphic rocks with various Phanerozoic granitoids invaded are widespread. Gold deposits here have close spatial relations to granitoids. Some deposits occur within them and others in the outer zone of the contact belt of the intrusion, extending thousands of metres. There have been controversial views in regard to the relations of the deposits to the intrusions although traditional techniques have been used to date the intrusions. In order to solve such a problem, the SHRIMP technique was adopted to date the U-Pb ages of zircon collected from the Yuerya intrusion which hosts the large-sized Yuerya Au deposit and Qingshankou intrusion 2 km away from the Jinchangyu (larger-sized) Au deposit. Analysis shows that the ages of 175±1 Ma and 174±3 Ma for Yuerya intrusion and the age of 199±2 Ma for Qingshankou granite indicate the Early Yanshanian stage of the Meso-Neal MCNAUGHTON David GROVES 2000Acta Geologica Sinica(English Edition)2000,74,2:1
19An Exploration of Experien- tial Education as An Instructional Methodology for Travel And Tourism 显示文摘Schlager Franz Lengfelder Julie Groves David 1999Educa- tion1999,,3:1
20The Breathprints in Patients With Liver Disease Identify Novel Breath Biomarkers in Alcoholic Hepatitis显示文摘Ibrahim A. Hanouneh Nizar N. Zein Frank Cikach Luma Dababneh David Grove Naim Alkhouri Rocio Lopez Raed A. Dweik 2014Clinical Gastroenterology and Hepatology2014,,3:1
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