Results 91 to 100 of about 12,962 (293)
Deep Underground Science and Engineering, EarlyView.Our study reveals that caving‐enhanced geothermal systems (C‐EGS) with adequately fractured reservoirs achieve optimal heat extraction by minimizing preferential flow paths, while conventional fracturing (F‐EGS) and pipe‐based (P‐EGS) systems suffer accelerated thermal drawdown.
Fangchao Kang +4 more
wiley +1 more source
Study on the Inlay Characteristics and Occurrences of Yunnan Porphyry Polymetallic Gold Deposits
Yankuang ceshi, 2018 BACKGROUND In the Western Yunnan, there is an abundance of low-grade gold resources with uneven grain size, complicated ore structure and incomplete separation. Using the traditional mineralogical analysis process, it is difficult to achieve accurate and
LIU Rong-xin +6 more
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang +5 more
wiley +1 more source
Deep Underground Science and Engineering, EarlyView.An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang +5 more
wiley +1 more source
, 2019 Mineralogy and gold processing techniques from several mining areas of the Nazca-Ocoña gold belt, Mid-South Peru, were investigated to assess the efficiency of gold extraction methods in relation to their mineralogy.
Hernan Anticoi +7 more
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Surface hydration‐induced damage in tight oil‐bearing sandy conglomerate reservoirs
Deep Underground Science and Engineering, EarlyView.A series of techniques such as X‐ray diffraction, scanning electron microscopy, energy‐dispersive spectroscopy, conductivity tests, and infrared thermal imaging were used. The key findings are the identification of a two‐stage surface hydration process and the elucidation of the effects of various minerals and elements on the hydration process ...
Anbang Zhao +5 more
wiley +1 more source
Process Mineralogy and Occurrence State of Lithium of Spodumene Tailings in Sichuan Province
Kuangchan zonghe liyongThis is an article in the field of process mineralogy. The study objects are Lijiagou and Jiajika tailings, Sichuan Province. The samples were identified by optical microscopy, artificial heavy sand research (separation, identification, etc.), optical ...
Panpan WANG +3 more
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, 2019 The Mineralogy Concept Inventory (MCI) is a statistically validated 18-question assessment that can be used to measure learning gains in introductory mineralogy courses.
Emily D. Scribner (7443431) +1 more
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Deep Underground Science and Engineering, EarlyView.Joint orientation significantly affects P‐wave velocity, with the highest velocity at zero‐degree angles, decreasing to 30° as the angle increases. The velocity increases slightly from 30 to 45 degrees but sharply decreases from 45 to 90 degrees. Abstract Determination of the required parameters in different science contexts using the ultrasonic wave ...
Yaghoob Zarei +4 more
wiley +1 more source
Research on Process Mineralogy of Potassium-Rich Shale
, 2010 The process mineralogy of potassium-rich shale from Chaoyang of Liaoning, China, was studied. Research results showed there are much less variety and smaller quantities in mineral compositions.
Jie Liu, Wan Zhong Yin, Yue Xin Han
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