|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Geochemical and Petrological Studies on the Early Carboniferous Sidingheishan Mafic-Ultramafic Iintrusion in the Southern Margin of the Central Asian Orogenic Belt,NW China显示文摘The Sidingheishan mafic-ultramafic intrusion is located in the eastern part of the Northern Tianshan Mountain, along the southern margin of the Central Asian Orogenic Belt in northern Xinjiang autonomous region of China. The Sidingheishan intrusion is mainly composed of wehrlite, olivine websterite, olivine gabbro, gabbro and hornblende gabbro. At least two pulses of magma were involved in the formation of the intrusion. The first pulse of magma produced an olivine-free unit and the second pulse produced an olivine-bearing unit. The magmas intruded the Devonian granites and granodiorites.An age of 351.4±5.8 Ma(Early Carboniferous) for the Sidingheishan intrusion has been determined by U-Pb SHRIMP analysis of zircon grains separated from the olivine gabbro unit. A U-Pb age of 359.2±6.4 Ma from the gabbro unit has been obtained by LA-ICP-MS. Olivine of the Sidingheishan intrusion reaches 82.52 mole% Fo and 1414 ppm Ni. On the basis of olivine-liquid equilibria, it has been calculated that the MgO and FeO included in the parental magma of a wehrlite sample were approximately10.43 wt% and 13.14 wt%, respectively. The Sidingheishan intrusive rocks are characterized by moderate enrichments in Th and Sm, slight enrichments in light REE, and depletions in Nb, Ta, Zr and Hf. The ε_(Nd)(t) values in the rock units vary from +6.70 to +9.64, and initial ^(87)Sr/^(86)Sr ratios range between 0.7035 and0.7042. Initial ^(206)Pb/^(204)Pb, ^(207)Pb/^(204)Pb and ^(208)Pb/^(204)Pb values fall in the ranges of 17.23-17.91,15.45-15.54 and 37.54-38.09 respectively. These characteristics are collectively similar to the Heishan intrusion and the Early Carboniferous subduction related volcanic rocks in the Santanghu Basin, North Tianshan and Beishan area. The low(La/Gd)_(PM) values between 0.26 and 1.77 indicate that the magma of the Sidingheishan intrusion was most likely derived from a depleted spinel-peridotite mantle.(Th/Nb)_(PM)ratios from 0.59 to 20.25 indicate contamination of the parental magma in the upper crust.Crystallization modeling methods suggest that the parental magma of the Sidingheishan intrusion was generated by flush melting of the asthenosphere and subsequently there was about 10 vol%contamination from a granitic melt. This was followed by about 5 vol% assimilation of upper crustal rocks. Thus, the high-Mg basaltic parental magma of Sidingheishan intrusion is interpreted to have formed from partial melting of the asthenosphere during the break-off of a subducted slab. | SUN Tao QIAN Zhuangzhi THAKURTA Joyashish YANG Shenghong XU Gang DUAN Jun GAO Bo WANG Jing | 2018 | Acta Geologica Sinica(English Edition)2018，92，3： | 3 |
| 2 | Exsolution Lamellae in Olivine Grains of Dunite Units from Different Types of Mafic-Ultramafic Complexes显示文摘Exsolution microstructures in olivine grains from dunite units in a few selected tectonic environments are reported here. They include lamellae of clinopyroxene and clinopyroxene-magnetite intergrowth in the Gaositai and Yellow Hill Alaskan-type complexes, clinopyroxene-magnetite intergrowth in the K?z?lda? ophiolite, and chromite lamellae in the Hongshishan mafic-ultramafic intrusive complex. These lamellae commonly occur as needle-or rod-like features and are oriented in olivine grains. The host olivine grains have Fo contents of 92.5–92.6 in the Gaositai complex, 86.5–90.1 in the Yellow Hill complex, 93.2–93.4 in the K?z?lda? ophiolite and 86.9–88.3 in the Hongshishan complex. Clinopyroxene in the rod-like intergrowth exsolved in olivine grains in the Gaositai and Yellow Hill is diopside with similar major element compositions of Ca O(23.6–24.3 wt%), SiO_2(52.2–54.0 wt%), Al_2O_3(0.67–2.15 wt%), Cr_2O_3(0.10–0.42 wt%) and Na_2O(0.14–0.26 wt%). It falls into the compositional field of hydrothermal clinopyroxene and its origin is thus probably related to reaction between dunite and fluids. The enrichment of the fluids in Ca^(2+), Fe^(3+), Cr^(3+) and Na+, resulted in elevated concentrations of these cations in olivine solid solutions via the reaction. With decreasing temperature, the olivine solid solutions altered to an intergrowth of magnetite and clinopyroxene. The Fe^(3+) and Cr^(3+) preferentially partitioned into magnetite, while Ca^(2+) and Na+ entered clinopyroxene. Since the studied Alaskan-type complexes and ophiolite formed in a subduction environment, the fluids were probably released from the subducted slab. In contrast, the exsolved chromite in olivine grains from the Hongshishan complex that formed in post-orogenic extension setting can be related to olivine equilibrated with Cr-bearing liquid. Similarly, these lamellae have all been observed in serpentine surrounding olivine grains, indicating genetic relations with serpentinization. | LIANG Zi XIAO yan Joyashish THAKURTA SU Benxun CHEN Chen BAI Yang Patrick A. SAKYI | 2018 | Acta Geologica Sinica(English Edition)2018，92，2： | 3 |
| 3 | Conserved homeodomain proteins interact with MADS box protein Mcm1 to restrict ECB-dependent transcription to the M/G1 phase of the cell cycle显示文摘 | Miles S Thakurta DG | 2002 | Genes & Development2002，16，： | 1 |
| 4 | Two-Dimensional Water-Scale Chemical Mechanical Planarization Models Based on Lubrication Theory and Mass Transport 显示文摘 | SUNDARARAJAN S THAKURTA D G SCHWENDEMAN D W | 1999 | J Electrochem Soc1999，146，2： | 1 |
| 5 | Preparation and characterization of phospholipid stabilized uniform sized magnetite nanoparticles显示文摘 | Jyotsnendu Giri Sanjukta Guha Thakurta Jayesh Bellare Arun Kumar Nigam Dhirendra Bahadur | 2005 | Journal of Magnetism and Magnetic Materials2005，，1： | 1 |
| 6 | Two-Dimensional Wafer-Scale Chemical Mechanical Planarization Models Based on Lubrication Theory and Mass Transport显示文摘 | SUNDARARAJAN S THAKURTA D G SCHWENDEMAN D W | 1999 | J Electrochem Soc1999，146，2： | 1 |
| 7 | Absence of mutations in cereblon (CRBN) and DNA damage-binding protein 1 (DDB1) genes and significance for IMiD therapy 显示文摘 | Thakurta A Gandhi AK Waldman MF et ol | 2014 | Leukemia2014，28，5： | 1 |
| 8 | Thermophoretic deposition of small particles in a direct numerical simulation of turbulent channel flow显示文摘 | THAKURTA D G CHEN M MCLAUGHLIN J B | 1998 | Hear and MassTransfer1998，41，24： | 1 |
| 9 | Conserved nuclear export sequences in Schizosaccharomyces pombe Mex67 and human TAP function in mRNA export by direct nuclear pore interactions显示文摘 | Thakurta AG Gopal G Yoon JH | 2004 | J Biol Chem2004，279，17： | 1 |
| 10 | Two-dimensional waferscale chemical mechanical planarization models based on lubrication theory and mass transport显示文摘 | SUNDARARAJAN S THAKURTA D G SCHWENDEMAN D W | 1999 | Journal of the electrochemical society1999，146，2： | 1 |
| 11 | Exenatide efficacy and safety: a systematic review 显示文摘 | Norris S L Lee N Thakurta S | 2009 | Diabet Med2009，26，： | 1 |
| 12 | Low-Ca contents and kink-banded textures are not unique to mantle olivine:evidence from the Duke Island Complex,Alaska显示文摘 | Li C S Thakurta J Ripley E M | | 0，，3： | 1 |
| 13 | Exenatide efficacy and safety:a systematic review显示文摘 | Norris SLl Lee N Thakurta S | 2009 | Diabet Med2009，26，9： | 1 |
| 14 | Two-Dimensional Wafer-Scale Chemical-Mechanical Planarization Models Based on Lubrication Theory and Mass Transport 显示文摘 | Sundararajan S Thakurta D G | 1999 | Journal of the Electrochemical Society1999，146，2： | 1 |
| 15 | A feature scale model for chemical mechanical planarization of damascene structures显示文摘 | SAXENA R THAKURTA D G GUTMANN R J | 2004 | Thin Solid Films2004，449，12： | 1 |
| 16 | Two-dimensional wafer-scale chemical mechanical planarization models based on lubrication theory and mass transport J 显示文摘 | Sundararajan S Thakurta D Schwendeman D | 1999 | Electochem Soc1999，146，2： | 1 |
| 17 | Structural basis of the unusual stabiliW and substrate specificity of ervatamin C, a plant cysteine protease from Ervatamia coronaria显示文摘 | THAKURTA P G BISWAS S CHAKRABARTI C | 2004 | Biochemistry2004，43，6： | 1 |
| 18 | Thermophoretic deposition of small particles in a direct numerical simulation of turbulent channel flow显示文摘 | Thakurta D G Chen M McLaughlin J B | 1998 | Hear and Mass Transfer1998，41，24： | 1 |
| 19 | Two- dimensional wafer-scale chemical mechanical planarizatinn models based on lubrication lheory and mass transport 显示文摘 | Sundararajan S Thakurta D G Schwendeman D W | 1999 | Journal of the Electrochemical Society1999，146，2： | 1 |
| 20 | Exenatide efficacy and safety: a systematic review 显示文摘 | Norris SL Lee N Thakurta S | 2009 | Diabet Med2009，26，9： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员