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GEOCHRONOLOGY AND GEOCHEMICAL CHARACTERISTICS OF VOLCANIC ROCKS SECTION IN MANZHOULI XINYOUQI, INNER-MONGOLIA

Chen Z.G.; Zhang L.C.; Wan B.; Zhou X.H.; Ying J.F.; Wang F. (2006)

Mesozoic volcanic rocks section in Manzhouli Xinyouqi, Inner-Mongolia is mainly composed of trachy-andesite, trachyte and rhyolite 40Ar-39Ar dating of lower section trachy-andesites and middle section rhyolites give a ...

Geochronology and geochemistry of granitoids from the Mongolian Altai

Boldbaatar D.; Osanai Y.; Nakano N.; Adachi T.; Sereenen J.; Kitano I.; Syeryekkhaan K. (2021)

Granitoid magmatism is widespread in the Mongolian Altai, and it provides critical information to understand the crustal formation, evolution, and growth. This study reports newly investigated petrography, whole–rock ...

GEOCHRONOLOGY AND GEOCHEMISTRY OF SINGLE-GRAIN ZIRCONS: SIMULTANEOUS IN-SITU ANALYSIS OF U-PB AGE AND TRACE ELEMENTS BY LAM-ICP-MS

Li X.H.; Liang X.; Sun M.; Liu Y.; Tu X. (2000)

Simultaneous in-situ analysis of U-Pb age and 26 trace elements for single-grain zircon using the LAM-ICPMS technique was successfully achieved in this study. The precision of analysis is 1 to 3 % for 207Pb/206Pb isotopic ...

Geochronology and Sr-Nd isotope geochemistry of Late Paleozoic collisional granitoids of Undinsky complex (Eastern Transbaikal region)

Dril S.I.; Noskova Yu.V.; Wang K.-L.; Belyaev V.A.; Skuzovatov S.Yu.; Grigoriev D.A.; Belkov D.A. (Федеральное государственное бюджетное учреждение науки Институт земной коры Сибирского отделения Российской академии наук, 2017)

GEOCHRONOLOGY AND STRATIGRAPHY OF LATE PLEISTOCENE LAKE CYCLES ON THE SOUTHERN BOLIVIAN ALTIPLANO: IMPLICATIONS FOR CAUSES OF TROPICAL CLIMATE CHANGE

Placzek C.; Quade J.; Patchett P.J. (2006)

Large paleolakes (~33,000-60,000 km2) that once occupied the high-altitude Poopo, Coipasa, and Uyuni Basins in southern Bolivia (18-22°S) provide evidence of major changes in low-latitude moisture. In these now-dry or ...

Geochronology and trace element geochemistry of zircon, monazite and garnet from the garnetite and/or associated other high-grade rocks: Implications for Palaeoproterozoic tectonothermal evolution of the Khondalite Belt, North China Craton

Shujuan Jiao; Jinghui Guo; Harley S.L.; Peng Peng (2013)

It is well documented that the Khondalite Belt of the North China Craton formed by the collision of the Yinshan and Ordos Blocks during ca. 1.95 Ga, but the onset of the post-collisional exhumation stage has not been well ...

GEOCHRONOLOGY OF A SURFACE CORE IN THE NORTHERN BASIN OF LAKE QINGHAI: EVIDENCE FROM 210PB AND 137CS RADIONUCLIDES

Xu H.; Ai L.; Tan L.; An Zh. (2006)

The radioactivities of 210Pb and 137Cs have been measured to estimate the dates of the sediments of a surface core (QH0407-C-2) in the northern basin of Lake Qinghai. The sedimentation rate derived from 210Pb radioactivity ...

GEOCHRONOLOGY OF BASALTS FROM THE VALLEY OF LAKES, MONGOLIA, AND THEIR CORRELATION WITH THE CENOZOIC SEDIMENTARY SEQUENCE

Devyatkin E.V.; Balogh K.; Dudich A. (2002)

The Valley of Lakes, Mongolia, is a key region in which to elaborate the geochronology of biostratigraphic horizons of the continental Paleogene and Neogene. Here, basaltic volcanism is developed widely. Basalt flow units ...

GEOCHRONOLOGY OF CENOZOIC BASALTS IN MONGOLIA AND THEIR RELATIONSHIPS WITH NEOTECTONIC STRUCTURES

Devyatkin E.V. (2004)

The epiplatform (Upper Cretaceous-Paleogene) and neotectonic (Neogene-Quaternary) evolutionary stages and morphostructures are distinguished in Mongolia. The neotectonic structures are characteristic of the orogenic zone ...

Geochronology of eruptions and parental magma sources of Elbrus Volcano, the Greater Caucasus: K-Ar and Sr-Nd-Pb isotope data.

Lebedev, V A; Chemyshev, I V; Chugaev, A V; Gol'tsman, Yu V; Bairova, E D (PANGAEA, 2010-09-14)

GEOCHRONOLOGY OF LAYERED MAFIC INTRUSIONS FROM THE PAN–XI AREA IN THE EMEISHAN LARGE IGNEOUS PROVINCE, SW CHINA

Zhong H.; Zhu W. (2006)

The Panzhihua–Xichang (Pan-Xi) area hosts mafic/ultramafic intrusions, which are part of the Permian Emeishan large igneous province. Some of these intrusions host giant Fe–Ti–V deposits and minor Ni–Cu–PGE mineralization. ...

GEOCHRONOLOGY OF POLYGENETIC MONAZITES CONSTRAINED BY IN SITU ELECTRON MICROPROBE TH-U-TOTAL LEAD DETERMINATION: IMPLICATIONS FOR LEAD BEHAVIOUR IN MONAZITE - TH-U-TOTAL PB EVIDENCE FROM AN ELECTRON MICROPROBE MONAZITE STUDY

Cocherie A.; Legendre O.; Peucat J.J.; Kouamelan A.N. (1998)

Monazite grains are generally concordant and, with an electron microprobe, give Th-U-total Pb isochron ages in agreement with conventional U-Pb data. Monazites from four samples of post-Archean migmatite from the Ivory ...

GEOCHRONOLOGY OF TAG AND SNAKEPIT HYDROTHERMAL FIELDS, MID-ATLANTIC RIDGE: WITNESS TO A LONG AND COMPLEX HYDROTHERMAL HISTORY

Lalou C.; Arnold M.; Brichet E.; Thompson G.; Druffel E.; Rona P.A. (1990)

Geochronological studies of a large number of precipitates from the TAG hydrothermal field and of few samples from Snakepit hydrothermal field of the Mid-Atlantic Ridge show intermittent repeated hydrothermal events at ...

Geochronology of the greatest Holocene explosive eruptions in Kamchatka and their imprint on the Greenland glacier shield

Braitseva O.A.; Sulerzhitskii L.D.; Ponomareva V.V.; Melekestsev I.V. (1997)

GEOCHRONOLOGY OF THE NABWAL HILLS: A RECORD OF EARLIEST MAGMATISM IN THE NORTHERN KENYAN RIFT VALLEY

McDOUGALL Ia.; Watkins R.T. (2006)

The Nabwal Hills, northeast of Lake Turkana, contain a record of magmatism associated with the initiation and early development of the East African Rift System in northernmost Kenya. The predominantly volcanic Asille Group, ...

GEOCHRONOLOGY OF THE NEOGENE-QUATERNARY DACITIC VOLCANISM IN THE NORTHWESTERN LESSER CAUCASUS (GEORGIA)

Lebedev V.A.; Chernyshev I.V.; Arakelyants M.M.; Gol'tsman Yu.V.; Dudauri O.Z.; Vashakidze G.T. (2004)

The isotopic geochronology of a representative collection of moderately acidic volcanics from the Javakheti neovolcanic area in the northwest of the Lesser Caucasus (Georgia) is studied using the K–Ar and Rb–Sr methods. ...

GEOCHRONOLOGY OF TRIASSIC-JURASSIC GRANITOIDS IN THE SOUTHERN FRAMING OF THE MONGOL-OKHOTSK FOLDBELT AND THE PROBLEM OF EARLY MESOZOIC GRANITE FORMATION IN CENTRAL AND EASTERN ASIA

Sorokin A.A.; Sorokin A.P.; Yarmolyuk V.V.; Kotov A.B.; Kudryashov N.M.; Jinyi L. (2004)

Early Mesozoic geological events played an important role in the structural evolution of Eastern and Central Asia. They involved collision between Siberia and Sino-Korean continents. This was accompanied by the closure of ...

GEOCHRONOLOGY, DISTRIBUTION, AND ICE VOLUME ON THE EARTH DURING THE LAST GLACIAL MAXIMUM: INFERENCES FROM NEW DATA

Velichko A.A.; Kononov Yu.M.; Faustova M.A. (2000)

The evaluated area and volume of ice sheets on the Earth during the Last Glacial Maximum (18-20 thousand years ago, oxygen isotope stage 2) are adjusted to the most recent data and our subglobal to global paleoglaciological ...

GEOCHRONOLOGY, GEOCHEMISTRY, AND GEODYNAMIC SETTING OF PALEOZOIC GRANITOIDS IN THE EASTERN SEGMENT OF MONGOL-OKHOTSK BELT

Sorokin A.A.; Sorokin A.P.; Kudryashov N.M.; Rublev A.G.; Levchenkov O.A.; Kotov A.B.; Sal'nikova E.B.; Kovach V.P. (2003)

Investigated is a series of granitoid massifs in the composition of Yankansky, Tukuringrskii, Jagdinsky, Seledjino-Kerbinsky, Tokursky terrenes. The results of U-Pb-geochronologic, geochemical and Sm-Nd-isotope-geochemical ...

Geochronology, mineral inclusions, and geochemistry of zircons in eclogitized gabbronorites in the Gridino area, Belomorian Province.

Volodichev, O I; Slabunov, A I; Sibelev, O S; Skublov, S G; Kuzenko, T I (PANGAEA, 2012-05-21)

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