A5103153743- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- High-pressure geophysics and materials
- Seismic Waves and Analysis
- Geochemistry and Elemental Analysis
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Geochemistry and Geochronology of Asian Mineral Deposits
- Seismic Imaging and Inversion Techniques
China Geological Survey
2019-2024
Ministry of Natural Resources
2023-2024
University of Cambridge
2003-2005
Durham University
2000
The Abdus Salam International Centre for Theoretical Physics (ICTP)
1998
University of Trieste
1998
Numerous seismic studies, in particular using receiver functions and explosion seismology, have provided a detailed picture of the structure thickness crust beneath Iceland transverse ridge. We review results propose structural model that is consistent with all observations. The upper typically 7 ± 1 km thick, heterogeneous has high velocity gradients. lower 15–30 5 thick begins where gradient decreases radically. This generally occurs at Vp∼ 6.5 s−1 level. A low-velocity zone ∼10 000 km2...
We develop a data-adaptive polarization filter that can spectacularly reduce microseismic noise contamination in three-component broad-band seismograms. The uses multitaper spectral analysis method for computing the data density matrix, which is defined as an ensemble average of outer products spectrum and its Hermitian adjoint. Under assumption strong three-component, seismograms additive white noise, be determined from seismogram segments without signals, is, pre-signal arrival time...
The Beimulang deposit, a newly discovered large porphyry copper containing 1.3 Mt @ 0.38% Cu, prominently features mineralized orebodies and hydrothermal alteration in the monzogranite porphyry. Zircon U-Pb dating reveals ages of 14.4–14.0 Ma for 11.2–11.0 granite A consistent Re-Os age 14.1 ± 0.4 from molybdenite suggests possible link between mineralization Miocene porphyries are rich SiO2 (70.01–72.81 wt%) Sr (217–864 ppm) have high Sr/Y ratios (26–139), which were originated partial...
位于中亚造山带中段南缘的北山地区，不仅是我国北方重要的三叠纪多金属成矿带，也是诠释中亚造山带南缘早中生代构造演化的关键区域。甘肃柳园地区位于北山南带，区内缺失三叠纪沉积记录，花岗质复式岩体和中酸性岩脉十分发育，基性岩脉也有分布，从而为探究北山早中生代构造演化提供了重要条件。基于此，本文对甘肃柳园地区晚三叠世辉绿岩脉开展了系统的锆石U-Pb-Hf同位素和全岩主量、微量元素分析。LA-ICPMS锆石U-Pb分析显示，辉绿岩形成于227.5±1.4Ma，年代为晚三叠世。全岩地球化学分析显示，辉绿岩具有高Mg<sup>#</sup>（65~70）、较高Ni含量（110×10<sup>-6</sup>~157×10<sup>-6</sup>）、轻重稀土分馏不明显（（La/Y）<sub>N</sub>为1.42~1.94）、无或弱Eu正异常、强烈亏损Nb、Ta和Zr、Hf弱富集的特征。较高的（Th/Nb）<sub>N</sub>（>1）和较低的Nb/La（<1）比值，稳定的La/Nb和Th/Nb比值说明其岩浆侵位过程中壳源物质的混染不强；而较高的Th/Yb比值，较低的Th/U和La/Nb比值...
Detailed geochronological, geochemical, and Sr-Nd-Hf isotopic data are presented for early Paleozoic volcanic rocks in the Karadaban area from northern Altyn region, NW China, with aim to constrain their petrogenesis tectonic implications. The show a bimodal distribution composition, rhyolite basalt. LA-ICP-MS zircon U-Pb age indicates that were erupted at 512 Ma. mafic calc-alkaline, enriched light rare earth elements (LREE) large-ion lithophile (LILE; Ba U) depleted high-field strength...
The Xiejiagou gold deposit located in the Zhaoyuan-Laizhou belt is composed of altered-rock-type mineralization and superposed auriferous quartz veins, showing unique two-stage mineralization. Oxygen hydrogen isotopic analyses yielded following results: δ18OH2O = 0.8‰ to 4.4‰ δD −106‰ −85‰ for mineralization, 3.6‰ 5.6‰ −98‰ −89‰ quartz-veins. Combined studies on Co/Ni, Sb/Bi As/Ag ratios pyrites, it can be inferred that ore-forming fluids were dominated by magmatic water mixed with very...
甘肃花牛山铅锌银矿床位于中亚造山带中段的甘肃北山地区。本文在详细的野外观察和室内鉴定的基础上，将花牛山铅锌银矿床成矿阶段划分为石英-毒砂-黄铁矿（第Ⅰ成矿阶段）和石英-多金属硫化物（第Ⅱ成矿阶段）两个阶段；进一步将黄铁矿划分为三种类型，分别为第一种类型的胶状黄铁矿（Py0）、第二种类型的热液叠加交代特征的黄铁矿（PyⅠ）及第三种类型的热液黄铁矿（PyⅡ）。黄铁矿、磁黄铁矿的原位硫同位素研究表明，成矿从早到晚硫化物δ<sup>34</sup>S值呈递增的规律，具有逐渐向岩浆硫演化的趋势；胶状黄铁矿δ<sup>34</sup>S值为-9.37‰~-8.10‰，具有沉积（生物成因）硫的特征；成矿第Ⅰ阶段硫化物δ<sup>34</sup>S值为-9.03‰~-7.03‰，成矿第Ⅱ阶段硫化物δ<sup>34</sup>S值为-5.77‰~-4.88‰，成矿阶段具有沉积硫与岩浆硫混合来源的特征。黄铁矿、磁黄铁矿的原位铅同位素研究表明，成矿期硫化物的<sup>206</sup>Pb/<sup>204</sup>Pb值、<sup>207</sup>Pb/<sup>204</sup>Pb值、<su...
北山造山带处于中亚造山带南缘，研究其岩浆事件对于推演中亚造山带地质构造演化具有重要意义。在甘肃北山南带的双鹰山-花牛山岛弧带中，分布有大量花岗质岩体。本文选取甘肃北山南带双峰山南复式岩体中的花岗闪长岩和二长花岗岩，开展LA-ICP-MS锆石年代学、Hf同位素、全岩地球化学和Sr-Nd同位素研究。研究结果表明该复式岩体成岩时代、地球化学与同位素特征基本一致，具体如下：（1）锆石年代学结果显示二长花岗岩年龄为367.5±1.7Ma、368.0±1.8Ma，花岗闪长岩年龄为366.3±2.2Ma，均为晚泥盆世；（2）复式岩体SiO<sub>2</sub>含量为64.39%~74.95%、碱含量为5.01%~9.21%，属准铝质（A/CNK=0.88~1.00），P<sub>2</sub>O<sub>5</sub>含量低（0.02%~0.17%），且与SiO<sub>2</sub>呈负相关，具有典型的I型花岗岩特征；（3）样品总体富集轻稀土元素（（La/Yb）<sub>N</sub>=6.23~23.0），具有较强烈的Eu负异常（δEu=0.31~0.55），富集Rb、Th、U等大离子亲...
康家湾铅锌矿床位于湖南省水口山矿田,矿体主要产于二叠系当冲组下段泥灰岩、硅质岩与栖霞组灰岩的层间硅化破碎带中。根据矿物组合和穿插关系,可将该矿床的成矿作用过程划分为3个阶段:黄铁矿-石英阶段、闪锌矿-方铅矿(黄铁矿)-石英阶段和方解石-闪锌矿-方铅矿阶段。流体包裹体研究表明,康家湾铅锌矿床黄铁矿-石英阶段的流体主要为中-高温(243~343℃)、中-高盐度(18.4%~33.8% NaCleqv)的流体;闪锌矿-方铅矿(黄铁矿)-石英阶段的流体为中-高温(278~352℃)、中-低盐度(1.1%~20.7% NaCleqv)流体;晚期方解石-闪锌矿-方铅矿阶段的流体为低温(125~191℃)、低盐度(0.2%~6.7%...
The Kaladaban Pb ─ Zn Cu volcanogenic massive sulphide deposit (VMS), located within the Altyn region of Xinjiang in NW China, is an economically significant with known reserves 414,400 t a grade 4.14%, 265,200 2.52%, and 149,200 1.10%. mineralization hosted basalt, rhyolite, rhyolite porphyry, latter two rock types yielding zircon U ages 516 505 Ma, respectively, representing timing crystallization. Samples host volcanic rocks show fractionated rare‐earth element (REE) patterns enrichment...