Guizhou Academy of Geological Survey

Guiyang, China

Guizhou Academy of Geological Survey

Guiyang, China
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Zhang H.,Chinese Academy of science | Zhang H.,Norwegian Institute for Water Research | Feng X.,Chinese Academy of science | Jiang C.,Wuhan University | And 7 more authors.
Environmental Pollution | Year: 2014

Rice is an important source of Se for billions of people throughout the world. The Wanshan area can be categorized as a seleniferous region due to its high soil Se content, but the Se content in the rice in Wanshan is much lower than that from typical seleniferous regions with an equivalent soil Se level. To investigate why the Se bioaccumulation in Wanshan is low, we measured the soil Se speciation using a sequential partial dissolution technique. The results demonstrated that the bioavailable species only accounted for a small proportion of the total Se in the soils from Wanshan, a much lower quantity than that found in the seleniferous regions. The potential mechanisms may be associated with the existence of Hg contamination, which is likely related to the formation of an inert Hg-Se insoluble precipitate in soils in Wanshan. © 2014 Elsevier Ltd. All rights reserved.


PubMed | Guizhou Normal University, Chinese Academy of science, Wuhan University, Guizhou Academy of Geological Survey and Norwegian Institute for Water Research
Type: | Journal: Environmental pollution (Barking, Essex : 1987) | Year: 2014

Rice is an important source of Se for billions of people throughout the world. The Wanshan area can be categorized as a seleniferous region due to its high soil Se content, but the Se content in the rice in Wanshan is much lower than that from typical seleniferous regions with an equivalent soil Se level. To investigate why the Se bioaccumulation in Wanshan is low, we measured the soil Se speciation using a sequential partial dissolution technique. The results demonstrated that the bioavailable species only accounted for a small proportion of the total Se in the soils from Wanshan, a much lower quantity than that found in the seleniferous regions. The potential mechanisms may be associated with the existence of Hg contamination, which is likely related to the formation of an inert Hg-Se insoluble precipitate in soils in Wanshan.


Lan Z.,CAS Institute of Geology and Geophysics | Li X.,CAS Institute of Geology and Geophysics | Zhu M.,CAS Nanjing Institute of Geology and Palaeontology | Chen Z.-Q.,Wuhan University | And 5 more authors.
Precambrian Research | Year: 2014

The Neoproterozoic glaciations represent a remarkable milestone in Earth evolution due to their major influence on atmosphere, biosphere, and hydrosphere. The early Cryogenian, 'Sturtian' glaciations, evidence for which has been recorded worldwide, may have lasted for about 50 million years, but the precise timing and synchroneity of these glaciations have been disputed. Jiangkou glacigenic strata in South China can be attributed to the Sturtian glacial episode as they share sedimentological, stratigraphic and lithological similarities with Sturtian strata in South Australia. As such, dating the onset of the Jiangkou glaciation would contribute to testing the synchroneity of the worldwide Sturtian glaciation. In this paper, we demonstrate by means of SIMS U-Pb zircon dating that the Jiangkou glaciation in South China was initiated at 715.9. ±. 2.8. Ma. The new age is, within uncertainty, synchronous with dates obtained from the lower parts of glacigenic successions in Laurentia and Oman, thereby indicating thereby indicating a synchroneity and global extent to the Sturtian glaciation. The synchronous occurrence of the Sturtian glaciation in mid- to low-latitude regions implies rapid ice sheet advancement in response to ice-albedo feedback, as supported by numerical climatic modeling. © 2014 Elsevier B.V.


Qiao W.,Guizhou Academy of Geological Survey | Wang J.,CAS Institute of Geology and Geophysics | Chen W.,Guizhou Academy of Geological Survey
Scientia Geologica Sinica | Year: 2013

The Nanhuan is a key period of one of the most important intervals in Earth's history marked by dramatic climatic, environmental changes. Here we present the geochemical variations through the Nanhuan succession from Jiaokai on the Yangtze block, south China, in order to investigate changes of palaeoenvironment and palaeoclimate. Relatively, low values of chemical index of alteration(CIA), Ti/Al of Tiesiao Formation, suggest a cold, dry climate and thus low source supply and glaciation period. In contrast, high values of CIA, Ti/Al of Longli and Datangpo formations, indicate a warm, humid climate and thus low source supply and interglaciation period. Variation in values of CIA, Ti/Al of Nantuo Formation indicate a warming and cooling cycle and thus a interglaciation to glaciation cycle The relative temporal coincidence of low magnitude of positive Eu anomalies and transition from glaciation to interlgaciation suggests that greenhouse gases(CO2, CH4) from hydrothermal venting could be one of the main controls on the demise of glaciation.


Tao P.,Hubei University | Tao P.,Guizhou Academy of Geological Survey | Xu Q.-S.,Guizhou University | Liu K.,Guizhou University
Geological Bulletin of China | Year: 2010

According to the technical requirements of national mineral resources potential evaluation, this article, taking the bauxite resource prediction in Guizhou Province as the example, this paper focuses on the prediction units division of the geological-unit and grid-unit method, the selection of essential factors for prediction, assigning value to essential factors as well as discussion of the influence of geological mapping scale, the characteristics of mineral deposit, geophysical and geochemical remote sensing information on mineral resource prediction, with the introduction of mineralizing types and its characteristics, prediction methods of sedimentary bauxite resource in China. This grid-unit method has considered the most essential prediction factors, and its accuracy has reaches to each single orebody or deposit.


Ma D.,Hubei University | Ma D.,Guizhou Academy of Geological Survey | Xiong X.,Guizhou Academy of Geological Survey | Zeng Y.,Guizhou Academy of Geological Survey | And 2 more authors.
Geological Bulletin of China | Year: 2015

Late Paleozoic volcanic strata are widely distributed in the Gangdise belt. Petrological and geochemical characteristics show that remarkable change of the Gangdise belt had already taken place in late Paleozoic. The authors found volcanics intercalation in Late Carboniferous-Early Permian Laka Formation within Tarezeng area along central and western segment of the Gangdise belt. Petrological and geochemical characteristics show that it belonged to an island arc environment and marked the first arc-producing action of the Gangdise belt that took place in Late Paleozoic. During that period, central and western segment of the Gangdise belt had already experienced the conversion from the passive continental margin to active continental margin. ©, 2015, Science Press. All right reserved.


Lin M.S.,Wuhan University | Peng S.B.,Wuhan University | Peng S.B.,China Three Gorges University | Qiao W.T.,Wuhan University | And 2 more authors.
Acta Petrologica Sinica | Year: 2014

Within the high geothermal anomaly areas in the Tengchong block, proto-mylonitic biotite monzonitic granite, ultramylonitized biotite monzonitic granite and silicified fractured syenogranite, are exposed in Zuosuoying of Qingshui, Heishihe of Xinhua, and Liuhuangtang of Rehai, respectively. Studies of deformation, metamorphism, petro-geochemistry and geochronology suggest that Late Cretaceous (73Ma) proto-mylonitic biotite monzonitic granite is a high temperature shoshonitic and strongly peraluminous granite formed in an active continental margin volcanic arc to a post-collisional tectonic setting. This granite has an early nearly horizontal (< 30°) stretching shear mylonitic foliation, with locally developed later high-angle dextral strike-slip extrusion mylonitic foliation. Eocene (48 ∼46Ma) ultra-mylonitized biotite monzonitic granite and silicified fractured syenogranite are mediumhigh temperature shoshonitic and strongly peraluminous A-type granites, which formed in a post-collisional environment to a within plate tectonic setting, where late high-angle (70° ∼87°) dextral strike-slip shear mylonitic foliations were developed. Late Cretaceous-Eocene shoshonitic and strongly peraluminous granitic magmatism was associated with basaltic magma underplating and partial melting of the crust, generated by upwelling mantle, which resulted from extensional collapse and delamination following the subductioncollision orogenic uplift. Eocene-Quaternary magma activity was spatially associated with high geothermal anomaly areas. The tectonic evolution during Late Neocene to Quaternary is represented by the formation of the strike-slip faults and extensional normal faults associated with extensional fault basin. Accordingly, the boundary faults of fault basins as well as deep magmatism are the predominant reasons for the concentrated distribution of the medium-high temperature geothermal springs along the strike-slip extensional fault zones.


Yang J.,Wuhan University | Cawood P.A.,University of St. Andrews | Cawood P.A.,University of Western Australia | Du Y.,Wuhan University | And 3 more authors.
Sedimentary Geology | Year: 2012

Whole-rock geochemistry and zircon trace element and U-Pb age data for Late Permian-early Middle Triassic volcanogenic sedimentary rocks in SW China show a change from Large Igneous Province to subduction-related sources immediately before the Permian-Triassic boundary. Zircons from Late Permian samples give identical within-error ages to the adjoining Emeishan Large Igneous Province (LIP). The bulk-rock geochemistry of these Late Permian units shows no depletion in high field strength elements and is similar to the high-titanium basalts of the Emeishan. Six samples of latest Permian-earliest Triassic tuff and two earliest Middle Triassic tuffs samples yield U-Pb zircon ages at of ~. 252. Ma and ~. 247. Ma, respectively. These tuffs and interstratified volcanogenic sedimentary rocks show significant depletion in high field strength elements, akin to magmatic arc-related rocks. Zircons from the tuffs have Nb/Hf, Th/Nb and Hf/Th ratios similar to those from arc/orogenic-related settings and distinct from the zircons from the Late Permian samples which display within-plate/anorogenic characteristics. Our data demonstrate that there is a compositional change of the volcanogenic sediments across the Permian-Triassic boundary in South China. © 2012 Elsevier B.V.


Lin S.-J.,Guizhou Academy of Geological Survey | Xiao J.-F.,Chinese Academy of Science | Lu D.-B.,Guizhou Academy of Geological Survey | Liu A.-M.,Guizhou Academy of Geological Survey | And 4 more authors.
Geological Bulletin of China | Year: 2010

The region which Fulu Formation stratotype section is situated at is the one of the preference places of Nahua System stratotype section in Hunan-Guizhou-Guangxi border region in South China. Fulu interglacial epoch can be divided into three warm climate periods and two icy climate periods. They are named as Sanjiang intersatial, Longjia icy stage, Lanyang intersatial, Liangjiehe icy stage and Datangpo intersatial. The strata corresponded with Fulu interglacial is Fulu Fomation. It is divided into five members which are Sanjiang Member, Longjia Member, Lanyang Member, Liangjiehe Member, Datangpo Member. After studing Gucheng Formation stratotype section in Changyang, Hubei Province and Tiesiao Formation stratotype section in Datangpo, Songtao County, Guizhou Province, it showed that both Gucheng Formation and Tiesiao Formation were formed in later Fulu interglacial epoch. They can not substitut for Chang'an Formation as the strata representation in early Nanhua System glaciation period.


Lu D.-B.,Guizhou Academy of Geological Survey | Xiao J.-F.,CAS Institute of Geochemistry | Lin S.-J.,Guizhou Academy of Geological Survey | Liu A.-M.,Guizhou Academy of Geological Survey | And 4 more authors.
Geological Bulletin of China | Year: 2010

The Nanhuaan section with successive good sedimentary record is situated in Lijiapo, Congjiang County, Guizhou Province. The section is characterized by well-devoloped stratigraphy, continuous deposition, maximum thickness, obvious stratigraph-ic criteria, clear boundary of top and base. Its internal rock units are respectively Chang'an Formation, Fulu Formation and Lijiapo Formation from bottom to top. The division boundary between them is clear, and can be identified and correlated easily in region. The Nanhua System is conformity with the Longli Formation of Xiajiang Group, Qingbaikouan (underlying) and Doushantuo Formation, Sinian (overlying) in the section. This section is a perfect location for studying "snowball event", and it has recorded perfectly sedimentary evolution in Nanhuaan Large Glaciation age (includes Chang'an glaciation, Fulu-Datangpo interglacion and Nantuo glaciation).

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