Chemical composition, genesis and exploration implication of garnet from the Hongshan Cu-Mo skarn deposit, SW China

2019 ◽  
Vol 112 ◽  
pp. 103016 ◽  
Author(s):  
Zhen-Dong Tian ◽  
Cheng-Biao Leng ◽  
Xing-Chun Zhang ◽  
Tehseen Zafar ◽  
Le-Jun Zhang ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Skarn Deposit ◽  
Sw China

Geochemistry of magnetite from the Hongniu–Hongshan Cu skarn deposit in Yunnan Province, SW China

2021 ◽  
pp. 104237
Author(s):  
Hui-juan Peng ◽  
Lin Hou ◽  
Ce Sun ◽  
Hao Zou ◽  
Tian-rui Weng ◽  
...  
Keyword(s):  
Yunnan Province ◽  
Skarn Deposit ◽  
Sw China

Chemical composition and seasonal variations of PM2.5 in an urban environment in Kunming, SW China: Importance of prevailing westerlies in cold season

2020 ◽  
Vol 237 ◽  
pp. 117704 ◽  
Author(s):  
Yunhong Zhou ◽  
Huayun Xiao ◽  
Hui Guan ◽  
Nengjian Zheng ◽  
Zhongyi Zhang ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Urban Environment ◽  
Seasonal Variations ◽  
Cold Season ◽  
Sw China

scholarly journals Mineralogy and Garnet Sm–Nd Dating for the Hongshan Skarn Deposit in the Zhongdian Area, SW China

Minerals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 243 ◽  
Author(s):  
Zu ◽  
Xue ◽  
Dong ◽  
Zhao
Keyword(s):  
Late Cretaceous ◽  
Southwest China ◽  
Skarn Deposit ◽  
Genetic Event ◽  
Sw China ◽  
Multiple Events ◽  
Hydrothermal Origin ◽  
Vein Type

The Hongshan deposit is one of the largest Cu-polymetallic deposits in the Zhongdian area, southwest China. Two types of Cu–Mo ores, mainly developed in the skarns, have been recognized in the Hongshan deposit, i.e., massive or layered skarn and vein-type, with the former being dominant. The highly andraditic composition of garnet (Adr100 to Adr64Gr32) and diopsidic composition of pyroxene (Di90Hd9 to Di1Hd99) indicate the layered skarn ores are of magmatic-hydrothermal origin that formed under oxidized conditions. Sm–Nd dating of garnet yield a well-constrained isochron age of 76.48 ± 7.29 Ma (MSWD = 1.2) for the layered skarn ores. This age was consistent with the Re–Os age for the pyrrhotite from the layered skarn ores, and thereby indicated that the layered skarn mineralization was formed in the Late Cretaceous, rather than in the Triassic as was previously thought. The coincidence of the geochronology from the layered skarn ores and vein-type mineralization further indicated that both ores were the result of a single genetic event, rather than multiple events. The recognition of the Late Cretaceous post-collisional porphyry–skarn Cu–Mo–W belt in the Zhongdian area exhibited a promising prospecting potential.

ENRICHMENT OF COPPER IN ORE-FORMING FLUID OF COPPER-TUNGSTEN MINERALIZATION OF THE YAMAGUCHI SKARN DEPOSIT, IWATE, JAPAN

1999 ◽  
Vol 09 (03n04) ◽  
pp. 431-439 ◽  
Author(s):  
D. ISHIYAMA ◽  
T. OGATA ◽  
H. SATOH ◽  
T. MIZUTA ◽  
K. SERA ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Fluid Inclusions ◽  
New South ◽  
Massive Sulfide ◽  
Deionized Water ◽  
Molar Ratio ◽  
Skarn Deposit ◽  
Sulfide Deposits ◽  
Cu Content ◽  
South Wales

Chemical composition of the fluids in the fluid inclusions of quartz from the pegmatite veins of the Yamaguchi W - Cu skarn deposit was measured by a combination of the crush-leach method in deionized water and chemical analysis using PIXE. Chemical composition of the fluids is characterized by a low molar ratio of Na/K and a high Cu concentration. The molar ratio of Cu /( Cu + Fe + Zn ) of the fluid inclusions is higher than that of massive sulfide deposits on the seafloor. The molar ratio of Cu /( Cu + Fe + Zn ) of the fluid inclusions is similar to the ratios of the vapor-rich fluid inclusions from the quartz-cassiterite veins hosted within the Mole Granite in New South Wales, Australia. The high Cu concentration in fluid inclusions of quartz associated with the pegmatite veins from the Yamaguchi deposit suggests that the fluid emanating from the Miyako granitic melt at the later stage of crystallization had a high Cu content.

scholarly journals Chemical Composition, Antioxidant, Antimicrobial and Anti-inflammatory Activities of the Stem and Leaf Essential Oils from Piper flaviflorum from Xishuangbanna, SW China

2014 ◽  
Vol 9 (7) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Ren Li ◽  
Jing-jing Yang ◽  
Yuan-fei Wang ◽  
Qian Sun ◽  
Hua-bin Hu
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Positive Control ◽  
Inflammatory Activity ◽  
Raw 264.7 Cells ◽  
No Production ◽  
Raw 264.7 ◽  
Sw China ◽  
Comparable Activity ◽  
Anti Inflammatory

The present study is the first investigation of the chemical composition, antioxidant, antimicrobial and anti-inflammatory activities of the stem and leaf essential oils from Piper flaviflorum C.DC (SEOP and LEOP), a plant that has been consumed as a wild vegetable, and used as medicine, and spice by the ethnic groups in Xishuangbanna, SW China. Analyzed by GC-MS, 42 and 30 components were identified representing 90.1% and 95.3% of the SEOP and LEOP, with (E)-nerolidol (16.7% and 40.5%), β-caryophyllene (26.6% and 14.6%) and elixene (5.3% and 12.3%) as their main constituents, respectively. Our results indicate that SEOP and LEOP have good anti-inflammatory activity by significantly inhibiting NO production induced by LPS in RAW 264.7 cells at 0.04± without effect on cell viability, and negligible antioxidant activity in both ABTS and FRAP assays. Moreover, the LEOP showed comparable activity with the positive control (tigecycline) against Aspergillus fumigatus, with MIC and MBC values ranging from 256 to 1024 μg/mL. The anti-inflammatory activity in LPS-induced RAW 264.7 cells is worthy of further investigation to discover the possible mechanisms of the NO production inhibition effect of these essential oils.

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