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DISCUSSION ON PALEOBIOMIGRATION AND ASSOCIATED PROBLEMS

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中国科学B辑(英文版) 1985年第7期28卷 772-784页

作者：徐炳川 562 Comprehensive geological brigade Chinese Academy of geological Sciences Yanjiao Sanhe Hebei Province

This paper is based on the Carboniferous materials of China and its neighbouring regions. It summarizes and points out interrelated phenomena associated with the organic evolution, the environmental change and the change of the lowest stratigraphic horizon of biota between high and low latitudes, through the stratigraphic and biologic time correlation. It infers a possible trend in the Carboniferous biomigration based on some events, showing the interrelationship between the biomigration and the environmental change since the Mesozoic Era. It briefly discusses the relations among biomigration, environment and organic evolution, the approaches to the study of biomigration, the non-synchroneity of biotic spatial distribution, the provenance of biota and the significance of dividing the biota into euryhabitat and stenohabitat ones.

关键词： Carboniferous stratigraphic horizon Mesozoic migration migrate Tertiary sedimentary briefly biologic

A Super-Large Rb-Nb Rare Metal Deposit has been Discovered in Huashi Village of Xinglong County, Hebei Province

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Acta Geologica Sinica(English Edition) 2017年第6期91卷 2344-2345页

作者： LI Yujing XIE Wu QI Yunfei MIAO Qunfeng XIONG Chao GONG Chuanwei geological Society of Hebei Province Qinhuangdao Mineral and Hydrology Engineering geological brigade of Hebei Bureau of Geology and Mineral Resources Exploration

Objective The Huashi Village in Xinglong County of Hebei Province is located in the Yanshan subsidence zone in the central eastern North China Plate, which is 137 km away from Beijing City （Fig. la）. This area has undergone large -scale magmatic intrusion affected by the tectonic compression of the Pacific Plate in the Mesozoic （known as the Yanshanian movement） to form many alkaline rocks such as the Wulingshan rock mass. Previous studies have conducted petrological research and reconnaissance survey of rare metal ores in this area （Tian Shuzhang and Guo Zongshan, 1981; Xu Baoling et al., 1996）. In 2016, the Qinhuangdao Mineral and Hydrology Engineering geological brigade of Hebei Bureau of Geology and Mineral Resources Exploration implemented the project of Reconnaissance of Rare Metal Ores Including Rubidium in Huashi Village of Xinglong County, Hebei Province, and discovered super-large rare metal deposits of rubidium and biobium in the Madi alkali feldspar granite bodies in the Huashi Village to achieve great breakthrough of rare metal ore prospecting.

关键词： A Super-Large Rb-Nb Rare Metal Deposit Huashi

CRUSTAL STRUCTURE OF THE SOUTH CHINA SEA BASIN

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Science in China,Ser.B 1983年第6期26卷 648-661页

作者：姚伯初王光宇 NO.2 Marine geological Investigation brigade Ministry of Geology and Mineral Resources Guangzhou

Based on the results from prospcction of seismic sonobuoy and two-ship refraction measurement, structural characteristics for earth crust of South China Sea Basin are analyzed: very thick crustal Layer 1, normal crustal Layer 2 and abnormally thin crustal Layer 3 are observed, with Layer 3 increasing continuously in thickness towards NS direction from the centre of the basin, and the earth crust becoming thick accordingly. These structural characteristics are in conformity with Cenozoic sea spreading mode inferred from magnetic anomaly. Finally, possible causes that account for these characteristics are discussed.

关键词： CRUSTAL STRUCTURE OF THE SOUTH CHINA SEA BASIN SEA

Geochemical and Isotopic Techniques Constraints on the Origin,Evolution,and Residence Time of Low-enthalpy geothermal Water in Western Wugongshan,SE China

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Acta Geologica Sinica(English Edition) 2024年第3期98卷 801-818页

作者： WANG Luyao LIU Kai MA Yan ZHANG Yaoyao TONG Jue JIA Wuhui ZHANG Shouchuan SUN Junliang Chinese Academy of geological Sciences Beijing 100037China School of Water Resources and Environment China University of Geoscience(Beijing)Beijing 100083China The Fourth geological brigade of Jiangxi geological Bureau PingxiangJiangxi 337000China

geothermal resources are increasingly gaining attention as a competitive,clean energy source to address the energy crisis and mitigate climate *** Wugongshan area,situated in the southeast coast geothermal belt of China,is a typical geothermal anomaly and contains abundant medium-and low-temperature geothermal *** study employed hydrogeochemical and isotopic techniques to explore the cyclic evolution of geothermal water in the western Wugongshan region,encompassing the recharge origin,water-rock interaction mechanisms,and residence *** results show that the geothermal water in the western region of Wugongshan is weakly alkaline,with low enthalpy and mineralization *** hydrochemistry of geothermal waters is dominated by Na-HCO_(3)and Na-SO_(4),while the hydrochemistry types of cold springs are all Na-HCO_(3).The hydrochemistry types of surface waters and rain waters are NaHCO_(3)or Ca-HCO_(3).The δD and δ^(18)O values reveal that the geothermal waters are recharged by atmospheric precipitation at an altitude between 550.0 and 1218.6 *** ratios of maj or solutes and isotopic compositions of^(87)Sr/^(86)Sr underscore the significant role of silicate weathering,dissolution,and cation exchange in controlling geothermal water ***,geothermal waters experienced varying degrees of mixing with cold water during their ***δ^(13)C values suggest that the primary sources of carbon in the geothermal waters were biogenic and ***δ^(34)S value suggests that the sulfates in geothermal water originate from sulfide minerals in the surrounding *** dating using 3H and^(14)C isotopes suggests that geothermal waters have a residence time exceeding 1 kaBP and undergo a long-distance cycling process.

关键词： geothermal water hydrochemistry isotope residence time Wugongshan area

Trace element composition of peridotites from the southern Mariana forearc:Insights into the geochemical effects of serpentinization and/or seafloor weathering

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Chinese Journal of Oceanology and Limnology 2009年第4期27卷 985-992页

作者：汪小妹曾志刚刘长华陈俊兵殷学博王晓媛陈代庚张国良李康陈帅欧阳荷根 Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of Sciences Graduate School of Chinese Academy of Sciences geological brigade of Hydrogeology and Engineering Geology Zhejiang Geological Prospecting Bureau

Peridotites from the southern Mariana forearc were sampled on the landward trench slope of the Izu-Bonin-Mariana (IBM) subduction zone by *** mantle wedge peridotites underwent hydration by fluid derived from a dehydrated descending slab,and later interacted with seawater after emplacement at or near the *** study investigates how these two different rock-fluid interaction processes influenced trace element distribution in the southern Mariana forearc *** measured trace element concentrations of peridotites from the southern Mariana *** southern Mariana forearc peridotites are characterized by a distinct seawater-like REE pattern with an obvious negative Ce anomaly,and La shows good correlation with other REEs (except Ce).In addition,there is a great enrichment of U,Pb,Sr and Li elements,which show a distinct positive anomaly relative to adjacent elements in the multi-element *** the seawater-like REE pattern,we infer that REEs are mainly influenced by seawater during peridotite-seawater interactions after their emplacement at or near the seafloor,by serpentinization or by marine ***,the anomalous behavior of Ce,compared with other rare earth elements in these samples,may indicate that they have undergone reactions involving Ce (IV) when the peridotites interacted with *** U,Pb,Sr and Li anomalies are inferred to be related to seawater and/or fluids released during dehydration of the subducting slab.

关键词： peridotites forearc Mariana element negative Ce anomaly

Talc-bearing serpentinized peridotites from the southern Mariana forearc:implications for aseismic character within subduction zones

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Chinese Journal of Oceanology and Limnology 2009年第3期27卷 667-673页

作者：汪小妹曾志刚刘长华陈俊兵殷学博王晓媛陈代庚张国良陈帅李康欧阳荷根 Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of Sciences Graduate School of Chinese Academy of Sciences geological brigade of Hydrogeology and Engineering Geology Zhejiang Geological Prospecting Bureau

The serpentinized peridotites overlying the subducted zones in the Izu-Bonin-Mariana(IBM) arc system have been interpret as the cause of the low-velocity layer identified beneath the IBM froearc,in turn few earthquakes occurred along the plate ***,which is a low temperature and highly hydrated phase of serpentine with low frictional strength,has been suggested as the low velocity material in the serpentinized peridotites,besides,brucite is inferred to be likely conducive to stable ***,such idea encounters challenging in our serpentinized peridotites from the southern Mariana forearc,which absent both the above *** presence of talc,which characterized by its weak,low-friction and inherently stable sliding behavior,provides new *** we report the occurrence of talc in serpentinized peridotites collected from the landward trench slope of the southern Mariana *** infer that talc is mainly forming as a result of the reaction of serpentine minerals with silica-saturated fluids released from the subducting slab,and talc also occurs as talc veins *** to its unique physical properties,talc may therefore play a significant role in aseismic slip in the IBM subduction zone.

关键词： talc serpentinized peridotites Mariana aseismic subducfion zone

THERMAL RESERVOIR MODEL ANALYSIS OF THE YANGBAJING geothermal FIELD,XIZANG (TIBET) AUTONOMOUS REGION

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Science China Chemistry 1984年第12期27卷 1316-1329页

作者：沈显杰王自瑞 Academia Sinica Beijing Institute of Geology Xizang Autonomous Region Geothermo-geological Research brigade

Based on the analyses of temperature field in subsurface geothermal reservoir aud un-derlying granitic batholith of the Yangbajing geothermal Field, both the difference in res-servoir eharacters of the northern and southern parts of the field and their identity in heatervoir characters of the northern and southehave been ascertained. Furthermore, it hasbeen establishedt hat the Nyainqentanglha and Tanggulashan piedmont fault zones are thecontrolling structures for the boundary of the geothermal field; meanwhile, the distributionof lithological character of the Quaternary system in the reservoir is the main controllingfactor for the geothermal reservoir behaviours. In accordance with the temperature datafrom the deep drill holes in the geothernml field, a heat transfer model down to a depth of3.3 km in basement rocks has been worked out. Using the principles of transient heat trans-fer and heat balance a rough estimate has been obtained that the last hydrothermal fluidinjection into the geothermal reserv

关键词： AUTONOMOUS REGION THERMAL RESERVOIR MODEL ANALYSIS OF THE YANGBAJING geothermal FIELD,XIZANG TIBET

A Catastrophe Mathematical Model for Uranium Mineralization of Hot-water Origin

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Acta Geochimica 1984年第4期3卷 396-406页

作者：戴杰敏陶代廉 geological brigade No.209 Yunnan geological Bureau Ministry of Nuclear In dustry Ministry ot Nuclear In dustry

Presented in this paper are some primary data on the temperature,stratigraphical altitudeand thickness of a certain uranium ore *** these data as the parameters for the tem-perature,pressure and geochemical conditions of uranium mineralization under ideal geologicalconditions which constitute a finite variable series,in conjunction with the catastrophe theorydeveloped by Rene Thom (1968),we have proposed a swallow-tail model fit to uranium *** model provides insight into the mechanism of uranium *** study shows that the process of uranium mineralization is a discontinuous or catastro-phic *** and pressure are considered important thermodynamic conditions whichcontrol the distribution pattern of uranium mineralization,and the principle of temperature-pres-sure correspondence for uranium mineralization has been also *** bodies of mi-nerogenetic importance serve as favourable geochemical media for capturing ore-forming *** mineralization of commercial importance depends on a delicate coupling betweentemperature,pressure,and geochemical *** loci of uranium mineralization in the mo-del constitute the surface K,referred to as the surface of enrichment-mineralization,on whichminerogenetic domain is *** model provides quantitatively clues to the process of uranium mineralization,i.e.,a pro-cess from quantitative to qualitative changes.

关键词： A Catastrophe Mathematical Model for Uranium Mineralization of Hot-water Origin

Endogenic Au-Ag polymetallic ore deposits and ore-bearing potentiality of strata

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Chinese Journal Of Geochemistry 2010年第4期29卷 407-415页

作者： WANG Baode NIU Shuyin SUN Aiqun XIE Yan LUO Yi LIU Hailong WANG Yanhua geological Survey Institute Shijiazhuang University of Economics Shijiazhuang 050031 China No.5 geological brigade Hebei Bureau of Geology and Mineral Resource Development and Exploitation Shijiazhuang 066000 China

The problem of ore-bearing potentiality of the strata involves metallogenic theory and ore-search *** of the spatial distribution of endogenic Au-Ag polymetallic ore deposits in North Hebei indicated that the strata in which ore deposits occurred range in age from Paleozoic,Proterozoic to *** addition the ore deposits are characterized as being strata-bound in *** arise and establishment of "extracting" viewpoint may be attributed to the following three reasons:1) influence by the idea of "ore-source bed";2) limitation of analytical techniques in the 1980s'(especially gold element);and 3) a small number of samples(sampling locations were mostly disturbed by mineralization).Studies have shown that ore-forming materials would most probably come from the deep interior of the ***-seated ore-bearing materials including Au-Ag polymetals were brought to the shallow levels by way of mantle plume-mantle sub-plume-mantle branch structure multi-stage evolution,finally leading to the formation of ore deposits.

关键词：银多金属矿床含矿地层地幔亚热柱找矿方向成矿理论空间分布地层性质地球深部