Геология России: Recent submissions

Now showing items 1141-1160 of 40749

THE XIONGCUN COPPER-GOLD DEPOSIT IN TIBET: CHARACTERISTICS, GENESIS AND GEODYNAMIC APPLICATION

Xu W.; Cui Y.; Chen W.; Yang D.; Lian Y.; Qu X.; Yang Z.; Hou Z.; Pan F. (2006)

According to the alteration and mineraliazation assemblage, mineralizations in Xiongcun deposit can be obviously distinguished into two styles, i. e. early veinlet-disseminated Cu(Au) mineralization with associated ...
PLATINUM GROUP ELEMENTS (PGE) GEOCHEMISTRY OF BAIMAZHAI NI-CU SULFIDE DEPOSIT AND ITS CONSTRAINTS ON THE ORE GENESIS

Wang S.; Sun X.; Shi G.; Xiong D.; Zai W. (2006)

Concentrations of platinum group elements (PGE) of ores and related rocks from Baimazhai Ni-Cu sulfide deposit were determined by using an ICP-MS with nickel sulfide fire assay pre-concentration. The results show that the ...
FACIES AND RESERVOIR-QUALITY VARIATIONS IN THE LATE VISEAN TO BASHKIRIAN OUTER PLATFORM, RIM, AND FLANK OF THE TENGIZ BUILDUP, PRECASPIAN BASIN, KAZAKHSTAN

Collins J.F.; Steffen K.L.; Kenter J.A.M.; Harris P.M.; Kuanysheva G.; Fischer D.J. (2006)

Tengiz field is an isolated carbonate buildup in the southeastern Precaspian Basin, containing a succession of shallow-water platforms ranging in age from late Famennian to early Bashkirian. Platform backstepping from ...
LATE VISEAN TO BASHKIRIAN PLATFORM CYCLICITY IN THE CENTRAL TENGIZ BUILDUP, PRECASPIAN BASIN, KAZAKHSTAN: DEPOSITIONAL EVOLUTION AND RESERVOIR DEVELOPMENT

Kenter J.A.M.; Harris P.M.; Collins J.F.; Weber L.J.; Kuanysheva G.; Fischer D.J. (2006)

he Tengiz buildup, an intensely cored and studied isolated carbonate platform in the Precaspian Basin, contains a succession of shallow-water deposits ranging from Famennian to Bashkirian in age. From a reservoir perspective, ...
DIAGENESIS OF THE CRETACEOUS SANDSTONE IN YUYANG FORMATION OF JIANGHAN BASIN AND ITS THERMODYNAMIC ANALYSE

Guan P.; Zhang W.T.; Wu X.S.; Xong J.Y. (2006)

Sandstones diagenesis in the Cretaceous Yuyang Formation, Jianghan Basin, China is charactered by cementation and replacement. Optical microscopy and other petrological studies have revealed four main diagenetic events. ...
DEFORMATION AND MELT TRANSPORT IN A HIGHLY DEPLETED PERIDOTITE MASSIF FROM THE CANADIAN CORDILLERA: IMPLICATIONS TO SEISMIC ANISOTROPY ABOVE SUBDUCTION ZONES

Tommasi A.; Vauchez A.; Godard M.; Belley F. (2006)

Seismic anisotropy in subduction zones results from a combination of various processes. Although it depends primarily on the orientation of olivine in response to flow, the presence of water and melt in the wedge may modify ...
A NEUTRON POWDER DIFFRACTION STUDY OF FE AND NI DISTRIBUTIONS IN SYNTHETIC PENTLANDITE AND VIOLARITE USING 60NI ISOTOPE

Tenailleau C.; Etschmann B.; Pring A.; Ibberson R.M. (2006)

Cation ordering in two important iron nickel sulfide minerals, pentlandite and violarite, was studied by neutron powder diffraction using samples prepared with isotopically enriched 60Ni. Pentlandite of composition Fe4.8Ni4.2 ...
RE-OS ISOTOPIC COMPOSITIONS OF LATE MESOZOIC MAFIC ROCKS FROM SOUTHEASTERN COAST OF CHINA

Zhou J.C.; Jiang S.Y.; Wang X.L.; Yang J.H.; Zhang M.Q. (2006)

The representative basalts and hornblende gabbros samples have been selected from early Cretaceous "bimodal volcanics" and "composite plutons" from eastern Zhejiang and southeastern Fujian provinces of southeastern coast ...
SEISMIC ANISOTROPY BENEATH THE NORTHERN APENNINES (ITALY): MANTLE FLOW OR LITHOSPHERE FABRIC?

Plomerová J.; Babuška V.; Vecsey L.; Margheriti L.; Pondrelli S.; Piccinini D.; Baccheschi P.; Salimbeni S.; Park J.; Levin V. (2006)

Shear-wave splitting estimates from recordings of 10 portable seismographic stations during the first year of the RETREAT seismic deployment, in combination with broadband data from the Italian national seismic network, ...
DEFORMATION FABRICS OF THE CIMA DI GAGNONE PERIDOTITE MASSIF, CENTRAL ALPS, SWITZERLAND: EVIDENCE OF DEFORMATION AT LOW TEMPERATURES IN THE PRESENCE OF WATER

Skemer P.; Katayama I.; Karato S.-I. (2006)

We report a new observation of the olivine B-type lattice-preferred orientation (LPO), from the garnet peridotite at Cima di Gagnone, Switzerland. The olivine B-type fabric forms at low temperatures and/or high stress in ...
SINOITE (SI2N2O) SHOCKED AT PRESSURES AT 28 TO 64 GPA

Sekine T.; Kobayashi T.; Shibata K.; He H. (2006)

Shock recovery experiments of sinoite (Si2N2O) were carried out in a pressure range of 28-64 GPa. Post-shock samples were investigated by optical microscopy, X-ray diffraction, micro Raman spectroscopy, and transmission ...
ZIRCON U-PB AGE AND THE GEOCHEMISTRY OF THE BAISHIQUAN MAFIC-ULTRAMAFIC COMPLEX IN THE EASTERN TIANSHAN, XINJIANG PROVINCE: CONSTRAINTS ON THE CLOSURE OF THE PALEO-ASIAN OCEAN

Mao Q.G.; Xiao W.J.; Han C.M.; Yan Z.; Yong Y.; Zhang J.E.; Yuan C.; Sun M.; Li J.L. (2006)

The Baishiquan Cu-Ni sulfide deposit is located in the northern part of the Center Tianshan Massif, south of the Aqikuduke-Shaquanzi fault of the Eastern Tianshan Mountains. Ore-body was formed by the magmas and lay within ...
COMPARATIVE STUDY ON PERMIAN BASALTS FROM EASTERN XINJIANG-BEISHAN AREA OF GANSU PROVINCE AND ITS TECTONIC IMPLICATIONS

Zhao Z.H.; Wang Y.; Guo Z.J.; Han B.F.; Liu C. (2006)

After comparing study on Permian basalts from Stantanghu basin eastern of Xinjiang and Liuyuan area of Beishan western of Gansu, on the basis of geochemical characteristics, it is concluded that nearly synchronogenic basalts ...
PLATINUM GROUP ELEMENTS (PGE) AND OS ISOTOPIC GEOCHEMISTRY OF FERROMANGANESE CRUSTS FROM PACIFIC OCEAN SEAMOUNTS AND THEIR CONSTRAINTS ON GENESIS

Sun X.M.; Xue T.; He G.W.; Zhang M.; Shi G.Y.; Wang S.W.; Lu H.F. (2006)

Platinum group elements (PGE), Au contents and Os isotopic compositions in ferromanganese crusts and their basaltic substrates from the central and west Pacific Ocean were analyzed. The results show that their PGE and Au ...
POST-COLLISIONAL ULTRAPOTASSIC ROCKS IN LHASA BLOCK, TIBETAN PLATEAU: SPATIAL AND TEMPORAL DISTRIBUTION AND ITS' IMPLICATIONS

Zhao Z.D.; Mo X.X.; Zhou S.; Dong G.C.; Wang L.L.; Nomade S.; Renne P.R.; Zhu D.C.; Liao Z.L. (2006)

Study of the postcollisional volcanics in Lhasa block in southern Tibet is one of the most important progresses in the Tibetan plateau in the past 10 years. This paper presents new 40Ar/39Ar dating results on biotites and ...
ORIGIN OF THE MIOCENE BUGASI GROUP VOLCANIC ROCKS IN THE CUOQIN COUNTY, WESTERN TIBETAN PLATEAU

Chen J.L.; Xu J.F.; Kang Z.Q.; Wang B.D. (2006)

It is generally believed that Cenozoic potassic and ultrapotassic volcanic rocks in Tibetan plateau are derived from a mantle source, but recent studies showed that some potassic rocks may also come from a lower crust. The ...
SOME PROBLEMS ON GRANITES AND VERTICAL GROWTH OF THE CONTINENTAL CRUST IN THE EASTERN TIANSHAN MOUNTAINS, NW CHINA

Gu L.X.; Zhang Z.Z.; Wu C.Z.; Tang J.H.; Wang C.S.; Xi A.H.; Zheng Y.C.; Wang Y.X. (2006)

Granite formation after major continental collision in the eastern Tianshan Mountains can be divided into three stages: the compression-extension transition stage (310 ~ 285Ma), the post-collision extension stage (285 ~ ...
TEARING AND DISCHRONAL SUBDUCTION OF THE INDIAN CONTINENTAL SLAB: EVIDENCE FROM CENOZOIC GANGDESE VOLCANO-MAGMATIC ROCKS IN SOUTH TIBET

Hou Z.Q.; Yang Z.M.; Zhao Z.D.; Gao Y.F.; Jiang W. (2006)

The Gangdese tectono-magmatic belt in the Tibetan continental collision zone can be divided, at least, three segments, i. e., western Gangdese (west to 85°E), middle Gangdese (85°E to 90°E) and eastern Gangdese (east to ...
RE-OS DATING OF THE MOLYBDENITE FROM THE QIUSHUWAN CU-MO DEPOSIT IN THE EAST QINLING AND ITS GEOLOGICAL SIGNIFICANCE

Guo B.J.; Mao J.W.; Qiu J.J.; Zhu X.L.; Li H.M.; Ye H.S.; Li M.W.; Qu W.J. (2006)

The Qiushuwan Cu-Mo deposit is an important porphyry-skarn type Cu-Mo deposit in the East Qinling. Six samples of molybdenite for Re-Os isotopic dating are analyzed and the model ages obtained from 145.57 ± 1.80Ma to 147.98 ...
APPLICATIONS OF THE DIFFERENT TYPES OF MINERAL-PAIR GEOTHERMOMETERS TO ECLOGITE AT HUANGZHEN IN THE DABIE OROGEN

Gao T.S.; Zheng Y.F.; Chen R.X. (2006)

Geothermometers of garnet-clinopyroxene Fe-Mg partition and quartz-mineral oxygen isotope fractionation are normally used to estimate temperatures of eclogite formation. Lately, natural observations and experimental ...

Now showing items 1141-1160 of 40749

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