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Geothermal resources formation conditions and preferred target areas in a certain county of Western Sichuan, China

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Journal of Groundwater Science and Engineering 2019年第1期7卷 61-69页

作者： LI Jun-ya WANG Yu-jue HE Xue-wen XUE Guo-dong XU Huan TIAN Yan-hong ZHAO Li-li CUI Qi-hang No.405 Geological Team Sichuan Bureau of Geology&Mineral Resources Exploration and Development

The geothermal resource is a form of "green" and renewable energy with huge development potential in terms of both environmental protection and economy. It was concluded that the exposed hot springs were mostly produced when fluids derived from atmospheric precipitation were heated deep and recurrently under the ground, developed banded geothermal reservoir in the pores of fault damage zones, fissure zones, hornification zones and dikes, and then moved upward with analyzing the geological and hydrogeological data as well as hydrochemical types of the naturally exposed hot springs in the studied region so as to ascertain the accumulation conditions of geothermal resources in a particular county in Western Sichuan and opt for suitable target areas for exploring geothermal resources. Four areas where geothermal resources are potentially located were proposed with analysis of their formation conditions based on this notion, and the "epsilon-shaped" structure in Zhimulin, the "epsilon-shaped" structure in Jiaochang, the vortex structure in Rewugou and the arcuate structure in Shidaguan were analyzed in this paper offering a reference for developing and exploiting the geothermal resources in the region as well as studying the development patterns of other hot springs in this region.

关键词： Geothermal resources geological structure Reservoir formation conditions

Research on basic characteristics of ~2H, ^(18)O and ^(14)C in geothermal fluid in Guangdong Province, China

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Journal of Groundwater Science and Engineering 2019年第1期7卷 42-52页

作者： ZENG Tu-rong No.4 geological team of Guangdong geological Bureau

In general, previous geothermal geochemical studies in Guangdong Province mainly involves single method to cover limited aspects and areas. In that way, various methods available cannot actually provide more convincing results of geothermal fluid's circulation system and evolution process from different dimensions, especially in terms of isotope. As a result, more comprehensive researches remain to be done on geochemistry of geothermal fluid, in particular, the space-time law of isotope's evolution pattern as well as recharge cycle. Based on data of environmental isotopes(~2H and ^(18)O) and the isotope of radiometric dating(^(14)C), geothermal geology, characteristics of groundwater flow field and types of goethermal reservior in Guangdong Province are taken into account in this paper, so as to analyze numerical rule and spatial distribution features of isotopes. Thus, corresponding main causes, mechanism and hydrogeological significance can be revealed to further study the potential of geothermal fluid to renew and recharge in the long run, which is conducive to enrich geothermal theories and solve existing hydrogeological problems.

关键词： Geothermal fluid Isotope Characteristics Types of geothermal reservior

Source and Enrichment Mechanism of Lithium in the Triassic Argillaceous Marine Sediments from Huangjinkou, Sichuan, China

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Acta Geologica Sinica(English Edition) 2022年第2期96卷 536-545页

作者： QIN Yan WANG Denghong ZHAO Yue YU Yang GAO Juanqin YU Feng ZHONG Jiaai LIU Zhu Key Laboratory of Metallogeny and Mineral Assessment Ministry of Natural ResourcesInstitute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China School of Earth Science and Resources China University of GeosciencesBeijing 100083China The 405 geological team Sichuan Province Geology and Mineral Exploration and Development BureauDujiangyanSichuan 611830China

In the Triassic marine sediments, an obvious enrichment of lithium has been found. The source and enrichment mechanism of lithium is unknown. Here, we report trace and rare earth element and isotope analyses for Triassic sedimentary samples from core ZK601, recovered from the Huangjinkou anticline in the Xuanhan basin. Lithium concentrations from the Leikoupo and Jialingjiang formations are much higher than the average concentrations in the crust of eastern China and in other marine sediments. Lithium concentrations are highest at depths of 3300–3360 m(in argillaceous marine sediments), and Li is positively correlated with Rb, Ga, Zr, Nb and other trace elements. The range of δ^(7)Li values in our samples is consistent with that in other Triassic marine carbonate rocks. Lithium concentrations and isotope ratios are negatively correlated in the argillaceous dolomite samples at depths of 3300–3360 m. We compared the results in this study with trace and rare earth elements in the clay from Sichuan and Chongqing, and propose that the clay in the argillaceous marine evaporites from Huangjinkou formed via the hydrolysis of volcanic ash during Early–Middle Triassic volcanic eruptions into brine basins, during which clay adsorbed Li from the brine and formed Li-rich argillaceous dolomites. The addition and hydrolysis of volcanic ash in the evaporative brine is also related to the formation of a new type of polyhalite.

关键词： lithium argillaceous marine sediments clay Triassic Xuanhan salt basin

Discussion on establishing monitoring networks for temperature fields of shallow thermal energy in Shandong, China

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Journal of Groundwater Science and Engineering 2019年第1期7卷 86-93页

作者： ZHOU Bo WEI Shan-ming WANG Tao NIE Yu-peng WANG Chuan-qi No.801 Hydrogeological Engineering geological team of Shandong Bureau of geological and Mineral Exploration and Development

In the recent decade, the construction projects related to shallow geothermal energy engineering have undergone rapid development in Shandong Province. The predominant type of these developments and applications was heat exchange through buried tubes and the main targets were residential and office buildings. However, an overwhelming majority of the completed geothermal heat pump projects lacked monitoring devices so that they were unable to comprehensively reflect the background values for the geothermal fields within the province and few researches were conducted on their influence on the geological environment. In this paper, locations for monitoring shallow geothermal energy and their validity of the monitoring point deployment were studied in view of the development and application status as well as geological background conditions of various projects located in multiple cities providing data support for analyzing the fluctuation trend and influence of large-scale shallow geothermal energy applications on the shallow geothermal and the feasibility and parameter designs of newly built systems in Shandong Province in the future.

关键词： Shallow geothermal energy Geothermal field Monitoring network

Two-episode Tectono-thermal Events of the Heyuan Fault in Late Cretaceous and Oligocene and their Tectonic Implications, Southernmost South China Block

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Acta Geologica Sinica(English Edition) 2022年第2期96卷 447-459页

作者： WANG Qiangmao LI Hailong LI Tingdong DING Xiaozhong ZHEN Junwei ZHANG Min FAN Yanxia Chinese Academy of geological Sciences Beijing 100037China School of Earth and Space Science Peking UniversityBeijing 100871China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China team-7 of Guangdong Bureau of Geology HuizhouGuangdong 516008China team-935 of Guangdong Non-Ferrous Metals geological Exploration Bureau HuizhouGuangdong 516001China

The Heyuan Fault, is one of the main NE-trending faults in the southernmost South China Block and is close to the northernmost South China Sea to the south. The fault features multi-stage deformation and controlled the formation of late Cretaceous to Cenozoic basins. Based on detailed field investigations and comprehensive geochronological research, including zircon U-Pb, Rb-Sr isochron, zircon U-Th-He dating, two episodic tectono-thermal events are recognized. The first occurred during ~79 Ma to 66 Ma, which is characterized by large-scale quartz-fluid emplacement. The other occurred at ~34 Ma, which features the eruption of a set of basalts. The two events show a changing on material source from siliceous hydrotherm to basalt magma, supporting obvious lithospheric thinning of the southernmost South China Block, which shed light on the geological evolution and the interaction mechanisms between the SCB and the northern South China Sea since the Late Cretaceous.

关键词： tectono-thermal events Heyuan Fault Heyuan Basin Guangdong Province South China Block South China Sea

Chemostratigraphy and lithological characters of Neoproterozoic cap carbonates from the Kuruktag Mountain, Xinjiang, western China

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Chinese Journal Of Geochemistry 2007年第2期26卷 132-142页

作者：杨瑞东张传林王伯勋罗新荣 Guizhou University Nanjing Institute of Geology and Mineral Resources No.4 geological team of Liaoning geological Bureau No.3 geological team of Xinjiang geological Bureau

The Neoproterozoic Era includes some of the most largest ice ages in the geological history. The exact number of glaciations is unknown, though there were at least two events of global glaciation. Neoproterozoic glacial deposits in the Kuruktag Mountain, Xinjiang, western China have proven that there had occurred three discrete Neoproterozoic glaciations. Diamictite units occurred in the Bayisi, Tereeken, and Hankalchough formations, carbonate units were recognized among the diamictites and immediately overlied the Bayisi, Tereeken and Hankalchough diamictites. Carbonates at the top of the Bayisi Formation are characterized by the dolo-sility stones with negative δ13C values ranging from -4.10‰ to -8.17‰ (PDB), comparable to the Sturtian cap carbonates that overlie the Sturtian glacial deposits from other Neoproterozoic sequences. Carbonates overlying the Tereeken Formation are characterized by the pinkish cap dolostones (ca. 10 m thick) with negative δ13C values ranging from -2.58‰ to -4.77‰ (PDB), comparable to the Marinoan cap carbonates. The cap is also characterized by tepee-like structures, barite precipitates and pseudomorphous aragonite crystal fan limestones. Carbonates at the top of the Hankalchough Formation are characterized by subaerial exposure crust (vadose pisolite structure, calcareous crust structure) dolostones with negative δ13C values ranging from -4.56‰ to -11.45‰ (PDB) and the calcareous crust dolostones, implying that the Hankalchough cap carbonates differ from either the Sturtian or Marinoan cap carbonates in sedimentary environment and carbon isotopic composition. In addition, it is suggested the Hankalchough glaciation belongs to a terrestrial glaciation and it is the third largest glaciation during the Neoproterozoic period on the Tarim platform.

关键词：新疆库鲁克塔格山新元古代帽成碳酸盐岩化学地层学岩石学特性

The Discovery of Deep Potassium and Lithium Resources in the Huangjinkou Anticline, Northeast of Sichuan

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Acta Geologica Sinica(English Edition) 2018年第3期92卷 1279-1280页

作者： ZHONG Jia'ai ZHENG Mianping TANG Xueyuan TANG Xue Yuan QI Wen ZHANG Zhen LIU Zhu WANG Fuming PANG Bo MLR Key Laboratory of Saline Lake Resources and Environments Institute of Mineral Resources CAGSBeo'ing 100037 China No. 405 geological team Sichuan Bureau of Geology and Mineral Resources Sichuan Dujiangyan611830 China

Objectives Important clues have been found for potassium prospecting in the Huangjinkou anticline of the northeast Sichuan Basin in the 1970s(Zheng et al.,2015;Lin et al.,2004).In 2008,China geological Survey launched a prospective investigation of potash resources in the western region of China,and the local governments and private-owned enterprises also responded positively.Then,

关键词： The Discovery of Deep Potassium the Huangjinkou Anticline

Structural Origin of the Red-Ribbon Style Iron Ores in the Xinyu Iron Deposit,Central Jiangxi Province

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Acta Geologica Sinica(English Edition) 2015年第2期89卷 691-692页

作者： CHEN Zhengle ZHANG Qing CHEN Bailin WANG Xueping SHEN Tao WU Junjie Institute of Geomechanics Chinese Academy of Geological Sciences East China Institute of Technology geological Investigation team in Western Jiangxi Province

The Xinyu iron deposit, located in central Jiangxi Province, is one of the most important BIF-type deposits in China. It is hosted in the Late Proterozoic volcanic- sedimentary rocks, which are composed of sericite- chlorite pyhllite, magnetite-bearing chlorite phyllite or schist, magnetite quartzite, and schist （Yu et al., 1989; Zeng et al., 2011）.

关键词： Structural Origin of the Red-Ribbon Style Iron Ores in the Xinyu Iron Deposit,Central Jiangxi Province

Recently Ratified and Proposed Cambrian Global Standard Stratotype-section and Points

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Acta Geologica Sinica(English Edition) 2011年第2期85卷 296-308页

作者： PENG Shanchi ZHU Xuejian ZUO Jinxun LIN Huanling CHEN Yong＇an WANG Longwu State Key Laboratory of Paleobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology the Chinese Academy of Sciences Nanjing 210008 China Henan Institute of geological Survey Zhengzhou 450007 China No. 405 geological team of Hunan Bureau of Geology and Mineral Resources Jishou 416007 China geological Surveying Institution of Zhejiang Province Xiaoshan 311203 China

This paper briefly summarizes an officially ratified Global Standard Stratotype-section and Point （GSSP） and a proposed GSSP for global stages of the Cambrian System. The Luoyixi section near Luoyixi town, Guzhang, northwestern Hunan is ratified as the boundary stratotype for the base of the global Guzhangian Stage, which is the upmost stage of an unnamed series termed provisionally as Cambrian Series 3. The GSSP position lies 121.3 m above the base of the Huaqiao Formation in the section, coinciding with the first appearance of the cosmopolitan agnostoid trilobite Lejopyge leavigata.The Duibian B section at Duibian village, Jiangshan, western Zhejiang, is proposed as the boundary stratotype for the base of the proposed global Jiangshanian Stage that is the second stage of the Furongian Series. The proposed GSSP position lies 108.12 m above the base of the Huayansi Formation in the section, coinciding with the first appearance of the cosmopolitan agnostoid trilobite Agnostotes orientalius. This horizon is also with the first appearance of the cosmopolitan polymerid trilobite lrvingella angustilimbata.

关键词： Global Standard Stratotype-section and Point Guzhangian Stage Luoyixi section proposed Jiangshanian Stage Duibian B section Cambrian System