Discovery of deep - level foreland thrust - fold structures in Taihang Mt. and its implication for early tectonic evolution of North China

Li, Jianghai; Niu, Xianglong; Zheng, Chao; Kusky, Timothy M.; Polat, Ali

doi:10.1080/10020070512331342040

Cited by 2 publications

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“…Black smokers are a form of submarine geothermal, more than 150 black smokers sulfide distribution areas have been found around the world, which Mainly distribute near the ridges in the oceans generally locating 2000~3000 meter deep. The hot fluid temperature in black smokers exit is about 200~400℃, the temperature gradient field of 400~0℃ and 100~300m high is formed in its surrounding, which spreads a few miles to a few tens of kilometers [3][4][5][6][7][8] . Because of the high temperature and pressure of black smokers, therefore, the hot fluid as the heat source compared with surface warm seawater around 25℃, temperature, pressure and temperature difference are greatly increased, which should be able to greatly improve thermodynamic cycle efficiency, decrease the size of the steam turbine and reduce the heat load of evaporator and condenser, all of these are very beneficial for ocean thermal energy conversion systems.…”

Section: Introductionmentioning

confidence: 99%

Study of Power Generation System Based on Black Smokers

Liang

Wang

2014

AMM

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The OTEC system of the paper studying is different with the traditional OTEC system, which takes the marine geothermal energy (black smokers) as the heat source, takes cold seawater of deep sea as the cold source. The paper analyzes and calculates some parameters of open-circle system which uses water vapor as the working fluid and the closed-circle system which uses pure ammonia as the working fluid, those parameters include thermal efficiency, heat load of condenser and evaporator, pump power consumption, and the net power output. The results show that: with the closed-circle system which uses pure ammonia as the working fluid, the large power consumption of hot water pump is the biggest problem for the open-circle system, besides reducing the temperature of hot fluid and increasing the flash pressure are disadvantageous for open-circle system; but water vapor as the working fluid helps to reduce the load of condenser and evaporator, which is very advantageous for heat exchanger design.

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Section: Introductionmentioning

confidence: 99%

Study of Power Generation System Based on Black Smokers

Liang

Wang

2014

AMM

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Source and evolution of fluids in the Shihu gold deposit, Taihang Mountains, China: evidence from microthermometry, chemical composition and noble gas isotope of fluid inclusions

Cao

Carranza

et al. 2012

GEEA

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The well-known Shihu quartz vein-type Au deposit in the Taihang Mountains in the North China Craton (NCC) is hosted by ductile-brittle faults within the Neo-archean–Palaeo-proterozoic Fuping Group metamorphic complex. The deposit exhibit four stages of quartz veins: (1) quartz-K-feldspar-sericite; (2) quartz-pyrite; (3) quartz-polymetallic sulphide; and (4) quartz-carbonate ± pyrite. Three types of ﬂuid inclusions in quartz are recognized in this study. Solid-bearing high-salinity (Type I) ﬂuid inclusions have homogenization temperatures of up to 390 ºC and high salinities of 33–47 wt% NaCl equivalent. Two-phase H 2 O-rich (Type II) fluid inclusions homogenized between 129–396 ºC and have salinities of 1.7–12.5 wt% NaCl equivalent. Two/three-phase CO 2 -rich (Type III) fluid inclusions, which are abundant in auriferous quartz veins, have homogenization temperatures of 205–358 ºC and salinities of 1.63–7.64 wt% NaCl equivalent. Laser Raman spectroscopy and quadrupole mass spectrometry confirmed that the vapour phase in the fluid inclusions is dominated by CO 2 , H 2 S, CH 4 , C 2 H 4 , N 2 and Ar besides H 2 O, whereas the liquid phase is composed of Cl − , SO 4 2− , Na + , and K + with minor Mg 2+ and Ca 2+ . Fluid inclusions in pyrite associated with quartz ore-stages (2) and (3) have ΣREE values of 0.61–342.17 ppm with negative Ce, Eu and Y anomalies and LREE enrichment relative to HREE, generally indicating a crustal source of ore fluids. Helium isotope studies of fluid inclusions in pyrites associated with quartz ore-stages (2) and (3) yielded 3 He/ 4 He ratios of 0.12–0.93 Ra (Ra=1.4×10 −6 for air) and 40 Ar/ 36 Ar ratios of 3690–23678. The noble gas data suggest c . 10–20% mantle-derived ore fluids, reflecting an increased interaction of ore fluids with surrounding crustal rocks contributing additional 4 He to the fluids. The present data and various information from published works suggest that the Shihu Au deposit was formed during lithospheric thinning or decratonization beneath the Taihang Mountains. The fluids derived from the lower crust, formed due to partial melting and dehydration of the lithospheric mantle, were mixed with magmatic and meteoric waters, and finally precipitated Au and associated metals in the Shihu deposit.

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Discovery of deep - level foreland thrust - fold structures in Taihang Mt. and its implication for early tectonic evolution of North China

Cited by 2 publications

References 0 publications

Study of Power Generation System Based on Black Smokers

Study of Power Generation System Based on Black Smokers

Source and evolution of fluids in the Shihu gold deposit, Taihang Mountains, China: evidence from microthermometry, chemical composition and noble gas isotope of fluid inclusions

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