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Introduction
Currently I'm working on the diagenesis of Permian-Triassic and Pleistocene carbonate successions, to determine the diagenetic overprint on inorganic carbon isotopic composition and the diagenetic response to Pleistocene sea-level change. The P-T materials came from South China. The project has been carried out for three years and is coming to close at the end of 2018. The Pleistocene project is in progress. Petrographic and geochemical analysis methods are routinely used in the research.
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January 2010 - December 2013
Publications
Publications (16)
For the continental rift-related geothermal system, the hydrothermal alteration zones are rarely studied for uranium exploration. High uranium concentrations (up to 36 ppm) are shown in the altered sandstones at the Rehai geothermal field (RHGF) in Tengchong, China. To demonstrate the uranium enrichment mechanism, this study comparatively examines...
The Daggyai sinters in Tibet are known for their Cs‐bearing deposits. To understand the relationship between Cs concentrations and sinter fabrics, variations in fabrics and Cs contents along a temperature gradient from 81 °C to 43 °C associated with the Daggyai Major Geyser are examined herein. The fabrics of sinters vary from stromatolite‐like in...
The Daggyai geyserites serve as hosts for cesium deposits; however, their origin, whether by chemical deposition or biological formation, is a topic of debate. To decipher the origin of geyserites, the petrographic features of the geyserite samples were examined. The geyserites exhibited columnar laminated, planar laminated, and spicular morphologi...
The nature (depositional or diagenetic) of laminated crusts associated with pisolites is still in debate, which hampers the interpretation of sea-level change on carbonate platforms. The Ladinian Yangtze platform margin, formed by the Longtou Formation, contains abundant laminated crusts associated with pisolites, providing an opportunity to decode...
Pleistocene aeolianites on Shidao, Xisha Islands are one of the rare aeolianite successions found in Asia. There, the aeolianites, which unconformably overlie Pleistocene coral reefs (Marine Isotope Stage 5e), are 21.8 m thick and formed largely of grains derived from heterozoan organisms, including foraminifera (predominantly Amphistegina), genicu...
The topic of dolomite formation has long presented a challenge to researchers. In this study, the origin of widely occurring oolitic dolomites from the Yudongzi outcrop in the lower Triassic Feixianguan formation in northwest Sichuan, China, was investigated through petrographic observations, and mineralogical and geochemical analysis. Analytical m...
The thrombolites across the Permian-Triassic boundary (PTB) are widely distributed in South China. In order to examine the utility of rare earth element and yttrium (REY) in the thrombolites as a proxy of palaeoseawater, the petrographic and geochemical (Sr, Mn, Fe, REY, δ¹³C, δ¹⁸O) features of thrombolites from Cili and Taiping sections are compar...
The carbon isotopic composition (δ¹³Ccarb) recorded in shelf carbonates has been widely used as a proxy for the isotopic composition (δ¹³CDIC) of surface ocean water to establish paleocean chemistry and circulation patterns. However, δ¹³Ccarb values do not necessarily preserve the δ¹³CDIC, due to post-depositional diagenetic alteration. In order to...
The Meishan Section D from China is the global stratotype section and point (GSSP) of the Permian-Triassic boundary (PTB). The succession has been divided into 115 beds with the PTB being placed in the middle of Bed 27. In this section and the laterally equivalent Section A, the diagenetic features of Beds 24 to 62 are examined in this study to det...
On Grand Cayman, the Pleistocene Ironshore Formation consists of six unconformity-bounded units of limestones that have been partially or completely altered to calcite by post-depositional meteoric diagenesis. In order to examine the diagenetic history from the perspective of geochemical elements, the concentrations of minor element (Sr, Na, Mg), t...
The Ironshore Formation on Grand Cayman consists of six
unconformity-bounded units (A to F) that developed in response to
repeated transgressive-regressive cycles during the Middle to Late
Pleistocene. Corals and matrices in limestones from the Rogers Wreck
Point (RWP), offshore George Town (GT), and western onshore (WO) areas
are characterized by...
On Grand Cayman, the unconformity bounded Units A to F in the Ironshore Formation represent repeated cycles of deposition and subaerial exposure that were associated with the dramatic oscillations in sea levels that characterized the Middle to Late Pleistocene. Montastrea annularis and Acropora palmata, the dominant corals found in Units A to F in...
Calcareous crusts, which include laminar (up to 6 cm thick) and non-laminar calcretes, have developed on ooid grainstones and skeletal wacke/pack/grain/floatstone in the Pleistocene Ironshore Formation exposed at Morgan’s Harbour, Tarpon Springs, and Rogers Wreck Point on Grand Cayman, British West Indies. Non-laminar calcretes, which consist large...
In Changxing (长兴) stage, Manyue (满月)-Honghua (红花) Section of Kaixian (开县), northeastern Sichuan (四川) Province was located in the platform-margin slope, which was the advantage area of reef-shoal depositional system developing. The strata of Changxing Formation are continuously exposed on both Honghua Section and Manyue Section. Four and two deposit...
The oolitic shoals of the Triassic carbonate platform margin in the Yudongzi (鱼洞子) outcrop of Erlangmiao (二郎庙) area in the northwestern Sichuan (四川) basin present a scarce opportunity to quantitatively describe their diagenesis and its effects on the acoustic velocity. Using a detailed field geologic survey, profiles illustration of typical deposit...
