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The Relation among Synthetic Fluid Inclusions homogenization temperature of Halite,Air temperature and Water temperature under Natural Conditions

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Acta Geologica Sinica(English Edition) 2014年第S1期88卷 244-244页

作者： QIN Huan CHI Zhe ZHOU hua SUN Xiaochi MENG Fanwei PEI Ni Nanjing University State Key Laboratory for Mineral Deposit Research Institute of Geo-Fluids School of Earth Science and EngineeringNanjing University State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences

A large number of fluid inclusions are formed in the crystal formation of halite,in which pure liquid phase ones supply a new method of paleo temperature inversion by means of cryogenic *** this study,we

关键词： halite fluid inclusions homogenization temperature air temperature maximum temperature

Oil Cracking of Deep Petroleum in Minfeng Sag in North Dongying Depression,Bohai Bay Basin,China:Evidence from Natural Fluid Inclusions

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Journal of Earth Science 2010年第4期21卷 455-470页

作者：平宏伟陈红汉宋国奇刘惠民 Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education China University of Geosciences(wuhan) Faculty of Earth Resources China University of Geosciences(wuhan) Institute of Geology and Geophysics Chinese Academy of Sciences The Shengli Oilfield Limited SINOPEC

A fluid inclusion fluorescence and microthermometric study was performed on sandstones from the deep Es4 reservoir rocks of the Minfeng （民丰） sag, north of Dongying （东营） depression. Two types of oil inclusions （yellow and blue white fluorescence）, one type of gas inclusions （blue white fluorescence）, and bitumen inclusions （no fluorescence） were detected within quartz and feldspar minerals. The evolution of hydrocarbon fluid inclusions in the lower Es4 sequence indicates that present oil accumulation was predominantly thermal stress controlled. homogenization temperatures of aqueous fluid inclusions coexisting with gas-bearing and bitumen-bearing fluid inclusions indicate that oil cracking occurred at temperatures up to 160 ℃, primary condensate or wet gas genera- tion occurred during 170-195℃. Oil has cracked into condensate or wet gas in the depth of 4 300- 4 410 m and dry gas and abundant pyrobitumen in the depth of more than 4 410 m in the geological history based on the fluid inclusion extrapolation. Secondary oil cracking is undergoing in present day when the depth of reservoir is more than 4 150 m whose temperature is the threshold temperature of oil cracking （160 ℃）. However, because of the consumption of oil in the first oil cracking process, it may have few chances to find liquid petroleum, and only natural gas can be found when the depth of reservoir is more than 4 410 m, where oil cracks into condensate gas or wet gas according to present-day formation temperature. This study is preliminary but foreshadows a new insight into oilcracking using natural fluid inclusions to trace hydrocarbon evolution in sedimentary basins.

关键词： oil cracking fluid inclusion homogenization temperature fluorescence bitumen pyrobitumen natural gas Dongying depression.

Isotopic Compositions of Sulfur in the Jinshachang Lead–Zinc Deposit, Yunnan, China, and its Implication on the Formation of Sulfur-Bearing Minerals

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Acta Geologica Sinica(English Edition) 2013年第5期87卷 1355-1369页

作者： BAI Junhao HUANG Zhilong ZHU Dan YAN Zaifei ZHOU Jiaxi State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of Sciences Henan Institute of Geological Survey Graduate University of Chinese Academy of Sciences

The Jinshachang lead-zinc deposit is mainly hosted in the Upper Neoproterozoic carbonate rocks of the Dengying Group and located in the Sichuan-Yunnan-Guizhou （SYG） Pb-Zn-Ag multi- metal mineralization area in China. Sulfides minerals including sphalerite, galena and pyrite postdate or coprecipitate with gangue mainly consisting of fluorite, quartz, and barite, making this deposit distinct from most lead-zinc deposits in the SYG. This deposit is controlled by tectonic structures, and most mineralization is located along or near faults zones. Emeishan basalts near the ore district might have contributed to the formation of orebodies. The j34S values of sphalerite, galena, pyrite and barite were estimated to be 3.6‰-13.4‰, 3.7‰-9.0‰, -6.4‰ to 29.2‰ and 32.1‰34.7‰, respectively. In view of the similar δ34S values of barite and sulfates being from the Cambrian strata, the sulfur of barite was likely derived from the Cambrian strata. The homogenization temperatures （T ≈ 134--383℃） of fluid inclusions were not suitable for reducing bacteria, therefore, the bacterial sulfate reduction could not have been an efficient path to generate reduced sulfur in this district. Although thermochemical sulfate reduction process had contributed to the production of reduced sulfur, it was not the main mechanism. Considering other aspects, it can be suggested that sulfur of sulfides should have been derived from magmatic activities. The δ34S values of sphalerite were found to be higher than those of coexisting galena. The equilibrium temperatures calculated by using the sulfur isotopic composition of mineral pairs matched well with the homogenization temperature of fluid inclusions, suggesting that the sulfur isotopic composition in ore-forming fluids had reached a partial equilibrium.

关键词： sulfur isotopic composition thermochemical sulfate reduction homogenization temperature equilibrium temperature Jinshachang lead-zinc deposit

Fluid Inclusions in Surface-temperature Halite： Sample Preparation and Application

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Acta Geologica Sinica(English Edition) 2018年第4期92卷 1592-1597页

作者： WANG Mingquan ZHAO Yanjun LI Wenxia LIU Chenglin China University of Geosciences Beijing 100083 China MLR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral Resources CAGS Beijing100037 China Qinghai Institute of Salt Lakes Chinese Academy of Science Xining 810008 China

Paleo-temperature and paleo-environment can be interpreted from measuring homogenization temperatures of fluid inclusions within halite. In order to conduct such measurements, vapor bubbles within low-temperature fluid inclusion often need to be created through cooling process by using cooling stage or freezer. Proper cooling is critical for interpreting measured temperature data. We tested two common cooling methods, using heating/freezing stage and freezer, for studying fluid inclusions in halite precipitated in laboratory at conrtolled temperature of 25＂C. While using the heating/freezing stage, halite samples were kept at -18＂C for 40-50 rain; whereas for freezer, samples were stored at -18＂C for 1, 10, 20 and 40 days, respectively. By comparing the homogenization temperatures of the two cooling processes, we explored the detailed experimental processes and developed an optimal cooling nucleation procedure for homogenization temperature analyses of fluid inclusions within surface-temperature halite. The results show that the maximum homogenization temperatures from both methods approximate the actual brine temperature of 25＂C. However, extended refrigeration time has noticeable influence on the results. The refrigeration time of the experiment can be shortened to meet requirements.

关键词： halite fluid inclusion cooling-nucleation method homogenization temperature

Characteristics of Oil and Gas Accumulation in Yong'an-Meitai Area of the Fushan Depression,Beibuwan Basin,South China Sea

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Petroleum Science 2007年第4期4卷 23-33页

作者： Li Meijun Wang Tieguan Liu Ju Zhang Meizhu Lu Hong Ma Qinglin Gao Lihui Key Laboratory for Hydrocarbon Accumulation Mechanism Ministry of Education School of Resources and lnformation China University of Petroleum Beo＇ing 102249 China South Oil Exploration and Development Company PetroChina Guangzhou Guangdong 510240 China Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou Guangdong 510640 China

The Yong＇an-Meitai area is the focus of the present exploration in the Fushan Depression, Beibuwan Basin, South China Sea. All oils from this area are geochemically characterized by higher Pr/Ph ratio, higher proportion of heavy molecular weight hydrocarbons, and higher proportion of C29 regular steranes, which indicate that the organic matter of source rocks might have been deposited in an oxidizing palaeoenvironment and be dominated by higher plant organic matter input. The oil from E3w2 （the second member of Weizhou Fro. of the Oligocene） has a much higher density, relatively higher Pr/nC17 and Ph/nC18 ratios, and a ＂UCM--unresolved complex mixture＂ on gas chromatograms, which indicate that it has been slightly biodegraded. CPI and other terpane and sterane isomer ratios suggest they are all mature oils. The timing of oil charging in E3w2 and E2I1 （the first member of the Liushagang Fro. of the Eocene） determined by the homogenization temperatures of fluid inclusions and thermal evolution history are from 9-3 Ma and 8-3 Ma, respectively. Thus, the interpretation of E3w2 as a secondary reservoir is unlikely. The timing of oil charging is later than that of hydrocarbon generating and expulsion of Liushagang Fin. source rocks and trap formation, which is favorable for oil accumulation in this area. All molecular parameters that are used for tracing oil filling direction decrease with shallower burial depth, which suggests vertical oil migration. The widely occurring faults that penetrate through the source rocks of the Liushagang Fro. may serve as a fine oil charging conduit.

关键词： Reservoir geochemistry homogenization temperature burial and thermal history oil migration and accumulation the Fushan Depression

Heating Stage Experimental Study of Melt Inclusions in Feldspars from Three Holocene Eruptions of Changbaishan Tianchi Volcano

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Earthquake Research in China 2008年第2期22卷 153-163页

作者： Li Ni Nicole Metrich Fan Qicheng Institute of Geology China Earthquake Administration Beijing 100029 China Laboratoire Pierre Sue CEA-CNRS Saclay 91191 Gif sur Yvette France

There occurred several eruptions from Changbaishan Tianchi volcano in Holocene, and at least three of them were believed to be true according to the formal studies. The products of three eruptions were yellow comenditic pumice of - 5000a B.P. （Eruption Ⅰ ）, gray comenditic pumice and pyroclastic flow of - 1000a B.P. （ Eruption II, i.e. the millennium explosive eruption）, black trachy pumice and welded tuff of - 300a B.P. （ Eruption Ⅲ ） respectively. There were a large number of melt inclusions found in phenocrysts, which differ in size and color. The Leitz 1350 heating stage experiments for melt inclusions in host feldspars from three Holocene eruptions of Changbaishan Tianchi volcano imply that there were little differences between the homogenization temperatures of melt inclusions from Eruptions Ⅰ and Ⅲ, whereas it was rather complicated for Eruption H, i.e. there might be two kinds of melt with different homogenization temperature periods, which gave the evidence for the assumption that the explosive millennium eruption of Tianchi volcano was triggered by injection and mixing of two different magmas. The experimental results also indicate that （ 1 ） small melt inclusion is easy to be homogenized, while the large one, especially the one with lots of daughter crystals, is rather difficult to be homogenized; （2） homogenization temperature closely correlates with the size of melt inclusion within host crystal, with the temperature point switching from high heating rate to low heating rate, and correlates with whether it is the first time to obtain homogenization as well; and （3） a melt inclusion can get different homogenization temperatures when it is repeatedly heated. Even more, the next homogenization temperature is usually higher than the former one, which testifies the phenomenon that hydrogen migration occurs during repeated heating.

关键词： Changbaishan Tianchi volcano Alkaline feldspar Melt inclusion Heating stage homogenization temperature

Characters of fluid inclusions in quartz veins in pyroclastic rock of Budate Group, Hailar Basin

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Journal of Geoscientific Research in Northeast Asia 2004年第2期7卷 161-164页

作者： ZHANGXin-tao LIULi GAOYu-qiao SHAOHong-mei SHENGuang-zheng CollegeofEarthSciences JilinUniversity.Changchun130061JilinChina ExploratinandDevelopmentResearchInstituteofDaqingOilfieldLimitedCo. Daqing163712HeilongjiangChina

It was adopted that the fluorescence microscope, Gas-Flow Heating/Freezing System, Laser-Raman Spect-roscopy, etc. are the multimedia techniques for analysing fluid inclusions of quartz veins in Budate Group, Hailar Basin. The results show that fluid inclusions in quartz veins are small(1～5 μm)monophase, two-phase(liquid+vapour)aqueous inclusions; the two-phase aqueous inclusions homogeniese to the liquid phase between 120～180℃, two dominant types for oil inclusions were determined in quartz veins:① the primary inclusions, almostly gas, measurement by Laser-Raman Spectroscopy show that both gas phase are enriched in CH4(94.50%～99.25%)and C6H6(0.75%～2.70%), under these conditions, inclusions may have come from juvenile fliud followingly the quartz veins formation. While the quartz veins exhibiting different striking luminescence has been proved by cathodoluminescence, it would be impossible to come from the deep magmas and strata. ② aqueous, liquid and two-phase(liquid+vapour)oil inclusions, belong to secondary hydrocarbon inclusions. The oil inclusions of this stage represent mainly the large scale of oil accumulation, located within the quartz microfracture.

关键词： Quartz veins homogenization temperature Laser-Raman Spectroscopy cathodoluminescence