Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Jing Zhao"'
Publikováno v:
American Mineralogist. 101:1228-1231
The full elastic tensors of two K-rich monoclinic alkali feldspars, Or 83 Ab 15 sanidine and Or 93 Ab 7 orthoclase, have been determined by using the Impulse Stimulated Light Scattering technique to measure surface acoustic wave velocities. The new d
Autor:
Allan Pring, Barbara Etschmann, Joël Brugger, Christine Rehm, Jan Ilavsky, Christopher J. Garvey, Hartmut Lemmel, Jing Zhao, Fang Xia, Young-Soo Han
Publikováno v:
American Mineralogist. 99:2398-2404
Porosity plays a key role in the formation and alteration of sulfide ore minerals, yet our knowledge of the nature and formation of the residual pores is very limited. Herein, we report the application of ultra-small-angle neutron scattering and smal
Publikováno v:
American Mineralogist. 99:2389-2397
We report the replacement of chalcopyrite by bornite under hydrothermal conditions in solutions containing Cu(I) and hydrosulfide over the temperature range 200–320 °C at autogenous pressures. Chalcopyrite was replaced by bornite under all studied
Autor:
Grant J. Griffiths, Allan Pring, Gregory R. Lumpkin, Barbara Etschmann, Joël Brugger, Elena R. Andreeva, Gerry Triani, Kan Li, Jing Zhao, Victor M. Okrugin
Publikováno v:
American Mineralogist. 99:1171-1174
Recent experiments have shown that microporous gold can be obtained via the oxidative dealloying of Au(Ag)-tellurides such as calaverite (AuTe2), krennerite (Au3AgTe8), and sylvanite [(Au,Ag)2Te4] under mild hydrothermal conditions. The same Au textu
Publikováno v:
American Mineralogist. 99:343-354
Chalcopyrite (CuFeS2) and bornite (Cu5FeS4) are the most abundant Cu-bearing minerals in hydrothermal Cu deposits, forming under a wide range of conditions from moderate-temperature sedimentary exhalative deposits to high-temperature porphyry Cu and
Publikováno v:
American Mineralogist. 98:2086-2095
Calaverite, krennerite, and sylvanite are Au-Ag-tellurides with close compositions and related crystal structures. Previous experimental studies show that both calaverite and sylvanite transform to porous “mustard” gold under hydrothermal conditi
Publikováno v:
American Mineralogist. 98:19-32
Under hydrothermal conditions, diffusion-driven solid-state reactions can compete with fluid-mediated reaction mechanisms. We have obtained an insight into the complex textures resulting from this competition by studying experimentally the transforma
Publikováno v:
American Mineralogist. 95:832-838
Two C 2/ c pyroxenes, CaMnSi 2 O 6 and CaZnSi 2 O 6 , were investigated at high pressure by single-crystal X-ray diffraction. Their unit-cell parameters were determined at 9 different pressures up to 7.55 and 8.23 GPa, respectively. No evidence of ph
Publikováno v:
American Mineralogist. 94:1541-1555
The transformation of calaverite to gold under hydrothermal conditions was studied experimentally by probing the effects of temperature (140 to 220 °C), pH (2–12), oxidant concentration, geometric specific surface area, and solid-weight to fluid-v
Autor:
WAESELMANN, NAËMI, BROWN, J. MICHAEL, ANGEL, ROSS J., ROSS, NANCY, JING ZHAO, KAMINSKY, WER- NER
Publikováno v:
American Mineralogist; May2016, p1228-1231, 4p