Výsledky vyhledávání - "Guanghai Shi"

Akademický článek

Spectral and chemical characterization of amber from Xixia, Henan Province, China via FTIR, three-dimensional fluorescence spectra and Py (HMDS)-GC-MS

Autor: Yan Li, Yilei Feng, Jingfen Du, Yamei Wang, Guanghai Shi, Youzhi Liang

Publikováno v: Heliyon, Vol 10, Iss 16, Pp e35066- (2024)

Xixia amber from Henan Province in China has undergone a thorough examination utilizing microscopic observation, infrared spectroscopy, and three-dimensional (3D) fluorescence spectroscopy. This systematic analysis has revealed that there are primari

Externí odkaz: https://doaj.org/article/7cbce732531a41998f68bcc582ee75ce

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Akademický článek

Spectral Characteristics of Nitrogen-Doped CVD Synthetic Diamonds and the Origin of Surface Blue Fluorescence

Autor: Yu Zhang, Guanghai Shi, Zixuan Xie

Publikováno v: Crystals, Vol 14, Iss 9, p 804 (2024)

In recent years, many studies have been published on CVD diamond growth, but the reason for the irregular blue surface fluorescence of CVD diamond under ultra-deep UV radiation (i.e., under DiamondView) is still unclear. Here, a batch of as-grown and

Externí odkaz: https://doaj.org/article/68c218bc97424f10ba660e5153f6caf0

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Akademický článek

Low-Crystallinity Index Chalcedony from Longhua, China: Characteristics and Formation

Autor: Qiuli Yan, Guanghai Shi

Publikováno v: Lithosphere, Vol 2023, Iss 1 (2023)

A low-crystallinity index chalcedony was found in the rhyolitic ignimbrite of the Late Jurassic Zhangjiakou Formation, located in Longhua County, Hebei Province, China. This chalcedony occurs as fillings along the fragile fractures of the host rock a

Externí odkaz: https://doaj.org/article/d635789c78f745828a42a5d26e31d691

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Akademický článek

A New Type of White Nephrite from Limestone Replacement along the Kunlun–Altyn Tagh Mountains: A Case from the Mida Deposit, Qiemo County, Xinjiang, China

Autor: Tianlong Jiang, Guanghai Shi, Danning Ye, Xiaochong Zhang, Linjing Zhang, Hongwei Han

Publikováno v: Crystals, Vol 13, Iss 12, p 1677 (2023)

The recently discovered Mida nephrite deposit, located in the East Kunlun Mountains, Qiemo County, Xinjiang, Northwest China, contains new types of white and greenish white nephrite formed by limestone replacement, which shows microstructures, macros

Externí odkaz: https://doaj.org/article/00ea2719a385416d867c7e8c3417971a

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Akademický článek

The factors controlling along-arc and across-arc variations of primitive arc magma compositions: A global perspective

Autor: Jian Wang, Matthew Gleeson, William D. Smith, Lin Ma, Zhibin Lei, Guanghai Shi, Long Chen

Publikováno v: Frontiers in Earth Science, Vol 10 (2022)

Arc volcanism is a key process influencing Earth’s climate, continental growth, and the formation of mineral deposits. Therefore in this contribution, we have compiled whole-rock geochemistry of frontal arc and rear-/back-arc basalts, crustal thick

Externí odkaz: https://doaj.org/article/460e48df2bca4b5b90b7a1b68098a5ee

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Akademický článek

Origin of Blue-Water Jadeite Jades from Myanmar and Guatemala: Differentiation by Non-Destructive Spectroscopic Techniques

Autor: Yu Zhang, Guanghai Shi

Publikováno v: Crystals, Vol 12, Iss 10, p 1448 (2022)

Identifying the origin of jadeite jades has become increasingly important from both mineral resource and metamorphic geology perspectives. In this study, we differentiate Myanmar gem-quality blue-water jadeite jades from their Guatemala counterparts

Externí odkaz: https://doaj.org/article/4b25e35132e04503a917bce097ea5e8b

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Akademický článek

Spectroscopic Characteristics of Treated-Color Natural Diamonds

Autor: Meili Wang, Guanghai Shi, Joe C. C. Yuan, Wen Han, Qing Bai

Publikováno v: Journal of Spectroscopy, Vol 2018 (2018)

With the increasing availability of treated-color diamonds on the market, their characterization is becoming more and more critical to the jewelry testers and customers. In this investigation, ten color diamonds treated by irradiation (4 pieces), HPH

Externí odkaz: https://doaj.org/article/35fdb05d40b942da97cc9e3e0cbf3490

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