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2015 Vol.24 Issue.3,
Published 2015-06-30
169
ANALYSIS ON THE LITHOFACIES PALEOGEOGRAPHY OF CAMBRIAN JIANCHANG FORMATION IN LIAONING PROVINCE
LI Hong-mei, QU Hong-xiang, ZHAO Xiu, FEI Ping, HOU Jing, LIU Shuang
Based on the characteristics of lithological association, sedimentary structure and facies fossil, the sedimentary environment and lithofacies paleogeography of Cambrian Jianchang Formation are studied. The open platform facies, restricted platform facies and open shelf facies are identified respectively.
2015 Vol. 24 (3): 169-172 [
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173
GEOCHEMISTRY AND SEDIMENTARY ENVIRONMENT OF THE SILICEOUS ROCKS FROM DEVONIAN DAMINSHAN FORMATION IN NORTHERN DAXINGANLING
ZHANG Yu-jin, WU Xin-wei, YANG Ya-jun, JIANG Bin, GUO Wei, ZHANG Chao
The silicalite and siliceous mudstone of Devonian Daminshan Formation are developed in northern Daxinganling, where the siliceous mudstone is rich in marine fossils. The Al/(Al+Fe+Mn)values of the siliceous rocks range from 0.60 to 0.71, with an average of 0.65. In the Al-Fe-Mn ternary diagram, all samples fall into non-hydrothermal siliceous rock area. The MnO/TiO
2
ratio is 0.07-0.34, and 0.18 in average. The
m
value is 13.87 to 47.15, averagely 23.90. The CaO/(Fe+CaO) value is between 0.65 and 0.98, with an average of 0.78. The ΣREE is low (averagely 62.77×10
-6
) and the average LREE/HREE is 6.67. The siliceous rocks are relatively enriched in LREEs, with slightly positive Ce anomalies (
δ
Ce 1.08-1.30, averagely 1.16). Combined with the sedimentary environment discrimination diagram for siliceous rocks, it is indicated that the siliceous rocks of Daminshan Formation are formed in the continental slope close to continent or the high-salinity seawater of marginal sea.
2015 Vol. 24 (3): 173-178 [
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179
GEOLOGY AND GENESIS OF THE BAYANHAR GOLD DEPOSIT IN INNER MONGOLIA
ZHANG Xue-ni, WANG Jia-xin, ZHANG Fu
The Bayanhar gold deposit of Inner Mongolia is located in the northwest margin of Ailimiao-Xilinhot median mass in the northern margin of North China Plate. It is hosted in the sericite-quartz schist and chlorite schist of Wenduermiao Group, Mesoproterozoic. The formation of the deposit has a close relationship with Variscan magmatic activity and ductile shear zone in the region. Five orebodies are delineated, which are occurred as stratiform or lentiform and generally in NW direction, with ore types of quartz vein and mylonite altered rocks. The gold mineralization is closely related to silicification and beresitization. According to its geological characteristics, mineral composition, dissemination, wall rock alteration features and the former measurement of fluid inclusion temperature, it is concluded that the Bayanhar gold deposit genetically belongs to epithermal type.
2015 Vol. 24 (3): 179-183 [
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184
ZIRCON U-Pb DATING, GEOCHEMISTRY AND GENESIS OF GABBRO IN BILIUTAI AREA OF EASTERN INNER MONGOLIA
GAO Xiao-yong, LI Yong-fei, SUN Shou-liang
Study on the petrology, geochemistry and LA-ICP-MS zircon U-Pb dating of the gabbro from Biliutai area in Eastern Inner Mongolia shows that the gabbro was formed during Early Triassic of(249±2.9) Ma, belonging to calk-alkaline series, with SiO
2
of 46.43%-50.77%, Al
2
O
3
of 11.27%-16.32% and TiO
2
of 0.20%-0.37%, high-Na (Na
2
>K
2
O, K
2
O/Na
2
=0.18-0.56)and high Mg
#
(75.08-78.93). The chondrite-normalized REE patterns and primitive mantle-normalized trace element spiderdiagrams show a slight differentiation between LREEs and HREEs featured by(La/Yb)
N
(2.32-3.99) and (Ce/Yb)
N
(2.45-3.45). The rocks are enriched in large ion lithophile elements(LILEs, such as Rb, Ba, Th, U and K), whereas depleted in high field strength elements (HFSEs, such as Nb, Ta, P, Ti and Zr), with the characteristics of subduction zone setting. Together with the regional geological information, the parental magma of gabbro might be the product of partial melting of lithospheric mantle, which were metasomatized by the fluid from the collisional orogenic belt between Siberian and Sino-Korean palaeoplates.
2015 Vol. 24 (3): 184-192 [
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193
ZIRCON U-Pb DATING AND GEOCHEMISTRY OF THE FANGJIAGOU PLUTON IN ZHALANTUN AREA, INNER MONGOLIA
GUO Wei, WU Xin-wei, ZHANG Yu-jin, JIANG Bin, ZHANG Chao, QIAN Cheng, CHEN Hui-jun
The Fangjiagou monzogranite pluton shows a typical magmatic origin with its clear crystal interior structures of zircon, developed oscillatory growth zonation and high Th/U ratio of 0.99 -3.10. The LA-ICP-MS zircon U-Pb dating is (152.9±2.2) Ma. The rock is peraluminous, belonging to high-K calc-alkali series, with SiO
2
content of 73.06%-76.25% and Rittman index (
σ
) of 2.51-2.63. The ratios of ΣLREE/ΣHREE and (La/Yb)
N
are respectively 6.21-10.43 and 4.98-12.18, with enrichment in LREEs and depletion in HREEs. The
δ
Eu values range from 0.52 to 0.72. The features above indicate that the Fangjiagou pluton belongs to peraluminous highly fractionated I-type granite, which may be formed due to the crust melting by temperature rising and pressure reducing in post-orogenic extensional environment, with crust thinning, materials from asthenosphere upwelling and mantle-derived magma underplating.
2015 Vol. 24 (3): 193-199 [
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200
GENETIC TYPE, PROSPECTING CRITERIA AND PREDICTION MODEL OF THE JINYING GOLD DEPOSIT IN JILIN PROVINVE
LI Bin, ZANG Xing-yun, TAO Chuan-zhong, MA Chun-sheng, MA Jing
The Jinying gold deposit is located in the junction of Hunjiang basin and Longgang uplift, genetically belonging to epithermal type. The stratigraphic criteria for prospecting include Mesoarchean Sandaogou formation, Paleoproterozoic Zhenzhumen formation and Neoproterozoic Diaoyutai formation. The tectonic indicators are the NE-trending basin marginal fault F101 and the interlayer-gliding fractural zone F100 between Zhenzhumen and Diaoyutai formations. The magmatic clue is the Late Jurassic granite porphyry. Based on these criteria, 14 prediction factors are extracted to establish the prediction model according to the prediction factors with assigned values for different weights. With prospecting practice in the periphery of Jinying gold orefield such as Ma'angang, the model is verified of its guiding significance for searching the Jinying-style of gold deposits.
2015 Vol. 24 (3): 200-204 [
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205
PROTOLITH RESTORATION AND TECTONIC SETTING OF THE WALL ROCKS IN THE QINGCHENGZI LEAD-ZINC-GOLD-SILVER ORE CONCENTRATION AREA IN LIAONING PROVINCE
SONG Yun-hong, HAO Li-bo, YANG Feng-chao
TheQingchengzioreconcentrationarea,whichoccurs along the Liaodong rift depression zone of Liaoning Province, is an important Pb-Zn-Au-Ag polymetallic mineralization concentration area in northern China. The orebodies and orebearing rock series occur in conformity, controlled by certain horizon and lithology, among which the Dashiqiao formation is the source bed of lead and zinc, and the Gaixian formation with high abundance of Au and rich in As serves as the source bed of gold and silver. The metamorphism and ductile shearing contribute to the enrichment and mineralization of gold. The wallrock of Pb-Zn deposit is mainly composed of marble, granulite and leptite of the Yangshugou lithoformation, Dashiqiao subgroup; while that of Au-Ag deposit, mainly schist of upper Gaixian formation, with a little granulite of Dashiqiao formation. The lithogeochemical characteristics of the wall rocks and protolith restoration show that the protolith of the marble is composed of limestone and dolomite, and the protolith of the granulite and leptite is mainly argillaceous sandstone, with minus volcanic rocks. The protolith of schist are mudstone, sandy mudstone and siltstone; while the protolith of leptynite is argillaceous sandstone. The tectonic setting of the marble and schist should belong to stable continental margin, and that of granulite and leptite should be of active continental margin or island arc. Combined with the history of regional tectonic evolution, it is believed that the crustal extension, deformation and relevant tectonomagmatic activities caused by rift action offered a favorable environment for the formation of the Pb-Zn deposits. Sedimentation within different levels of rift basins, submarine volcanic exhalation and hydrothermal sedimentation along the contemporaneous faults offered oreforming substances and fluids for the formation of source bed. The metamorphism occurred in Luliang period played a key role in controlling the superimposition and enrichment of the Pb-Zn deposits in this area.
2015 Vol. 24 (3): 205-214 [
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215
GEOLOGICAL CHARACTERISTICS AND UTILIZATION PROSPECTS OF THE ALBITE DEPOSIT IN CAOHECHENG, LIAONING PROVINCE
LIU Zhong-jie, WANG Lin
The Caohecheng albite deposit in Benxi County, Liaoning Province, is occurred as lenticular and vein in the Gaoliduntai plagiogranite of Liaohe tectonic cycle, genetically belonging to magmatic type of deposit. The average grades of Na
2
and K
2
O in the deposit are 7.25% and 0.51%, respectively. The albite deposit has a wide market utilization prospects. Analysis results show that the albite ore can be used in the fields like ceramic batching, glass flux, etc.
2015 Vol. 24 (3): 215-217 [
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218
EXPLORATION PROSPECTS AND METALLOGENIC PREDICTION OF DIAMOND IN NORTH CHINA PLATFORM
WAN Fang-lai, JIANG Jin-jing
The North China platform is the most important metallogenic province for diamond in China. Primary diamond deposits of kimberlite type with economic value were discovered in Shandong and Liaoning, and diamond ore occurrences and significant prospecting information were also found in Jiangsu, Anhui, Henan, Hebei, Shanxi and Jilin. Based on the metallogenic regularity, as well as the comprehensive information results of geophysical, geochemical and heavy mineral prospecting research for the primary diamond deposit in North China platform, four metallogenic prospective areas are identified in the metallogenic province of primary diamond deposit in Tanlu fault zone, Taihang Mountains fault zone and the northern margin of North China platform.
2015 Vol. 24 (3): 218-225 [
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226
GEOLOGY AND GEODYNAMIC SETTING OF THE CONCEALED PORPHYRY MOLYBDENUM DEPOSIT IN YAOCHONG, HENAN PROVINCE
ZHANG Zong-ke, LI Yi, CHEN Peng, ZHANG Zi-sen, XU Kuang-hua, LUO Zheng-zhuan
With comprehensive analysis and comparative study on the metallogenic setting, occurrence characteristics, metallogenic epoch and geodynamic setting of the Yaochong concealed porphyry Mo deposit, it is concluded that the Yaochong Mo deposit occurs in the western section of Dabie metallogenic belt, with the orebody hosted in the Mesoproterozoic altered gneiss at the exocontact of granite-porphyry body (dyke) and controlled by concealed porphyry and structures. The deposit is formed mainly by filling mineralization. The main molybdenite mineralization occurs in dissemination, veinlet-stockwork, thin film and breccia. With former researches on the northern foot of Dabie Mountains and the isotopic age contrast between Yaochong Mo deposit and neighboring Mo deposits, ore-bearing porphyry and Mesozoic granite batholiths, the authors suppose that the metallogenic age of the Yaochong Mo deposit is about 140 Ma and the corresponding geodynamic setting is the rapid lithospheric thinning on a large scale in Eastern China.
2015 Vol. 24 (3): 226-232 [
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233
GEOLOGY AND GENESIS OF THE TIANCHUAN VANADIUM DEPOSIT IN XICHUAN COUNTY, HENAN PROVINCE
LIU Ya-nan, LI Jian-quan, LI Zhong-feng, OUYANG Zhao-zhuo, LIANG Ling-xiao
The Tianchuan vanadium deposit in Xichuan County of Henan Province, located in the south limb of JingziguanShigang synclinorium, is strictly controlled by the black rock series at the bottom of Lower Cambrian Shuigoukou Formation in southern branch of Eastern Qinling orogenic belt. The ore types involve siliceous rock, mudstone and siliceous rock mixed with thin-layer mudstone. The deposit genesis is the coupling of deep sea-neritic facies sedimentary carbonate bedded deposition and submarine hydrothermal solution.
2015 Vol. 24 (3): 233-236,192 [
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237
COPPER MINERAL RESOURCES AND METALLOGENIC PREDICTION IN LAOS
ZHAO Zuo-xin, WANG Ze-chuan, ZHU Yan-zhe, YAN Cheng-min
There are 7 copper deposits, 44 ore occurrences, 13 mineralized spots and 5 anomalous spots discovered in Laos. The significant deposits include Ban Namo copper deposit, Phou Thung copper deposit, Phu Khan copper-gold deposit, Ban Namthong copper deposit, Sepon copper-gold deposit and Pha Yinshui copper deposit. The deposits genetically belong to sedimentary reformation, skarn, hydrothermal and porphyry types. According to the stratigraphic, magmatic rock, structural conditions and distribution of copper deposits (occurrences), Laos can be divided into 6 metallogenic prospect areas, among which the Vangviang Grade I metallogenic prospect area, Phongsali-Muang Xay and Pakse-Samakkhixay Grade Ⅱ metallogenic prospect areas are important.
2015 Vol. 24 (3): 237-241 [
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242
RESOURCES PROSPECTS AND DEVELOPMENT STRATEGY OF UNCONVENTIONAL OIL AND GAS IN DAQING EXPLORATORY AREA
YANG Hai-bo, YANG Jian-guo, GUO Qing-xia
With analysis on the great potential of unconventional oil and gas resources like biogas, shale oil, coalbed methane, tight sandstone gas and shale gas in Daqing exploratory area, the authors point out that there are five problems, namely, low degree of proved reserves, imperfect technology, inadequate policy support and investment, ambiguous mineral right and insufficient professionals in the exploration and development. Five countermeasures and four levels of aims and directions such as output increase, scale production, scale reserves exploration and shooting for industrial discovery are determined, which provide reliable evidence for reasonable exploration and development of unconventional oil and gas resource in the study area.
2015 Vol. 24 (3): 242-247,183 [
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248
FINE DIVISION AND CORRELATION OF THE PALEOGENE SUWEIYI FORMATION RESERVOIR IN DINA GASFIELD, KUQA DEPRESSION
ZHANG Xue-wei, YANG Jun-sheng, YUAN Jing, WU Yong-ping, ZHENG Guang-quan
The stratigraphic correlation methods, which include marker bed correlation, cycle correlation and hierarchical control, are adopted to carry out fine division and correlation of the reservoir of Suweiyi Formation in Dina gasfield. Two primary marker beds at the top of and underlying the Suweiyi Formation and four internal secondary marker beds are key to divide gas layer group and sand group, while the sedimentary characteristics of three third-order cycles, five fourth-order cycles and 19 fifth-order cycles are the basis to divide sand group and sublayer. The Suweiyi Formation of Paleogene can be divided into 5 sand groups and 19 sublayers based on the characteristics of marker beds and sedimentary cycles above.
2015 Vol. 24 (3): 248-254 [
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255
STUDY ON THE DYNAMIC CHANGE OF LAND USE IN SHENYANG BASED ON OBJECT-ORIENTED CLASSIFICATION TECHNOLOGY
XIE Shuai, WANG Zhe
Based on RS and GIS, the authors build the interpretation mark of land use type with object-oriented classification technology in accordance with the actual situation of Shenyang, to split images with multi-scale segmentation. A classification rule is established with decision tree method and nearest-neighbor method to extract the regional land use information and get the land use/land cover data of two periods. The dynamic change of land use and its driving force in the study area is then analyzed. In the abstraction of surface landscape information, the object-oriented classification fully uses the ground-object spectral information and texture features to overcome mixing phenomenon to the maximum extent due to similarity of different ground-object spectral information and difference of the same spectral information.
2015 Vol. 24 (3): 255-260 [
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35
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261
QUICK INPUT METHOD FOR INTEGRATED ACQUISITION DATA FROM DIGITAL GEOLOGICAL SURVEY SYSTEM
WU Ji-hong, JIA Li-guo, LI Wei
The Digital Geological Survey System (DGSS) is a professional software for regional geological survey on the basis of secondary development of MapGIS by China Geological Survey. It has an integration function of multi-source data for geological survey data with remote sensing, geophysical and geochemical data and so forth. The DGSS is currently only fully applied in large scale regional geological and mineral survey, and forms corresponding criteria, but is not required in geophysical and geochemical exploration. Therefore, geophysical and geochemical raw data and results are not filled in the record cards, which makes data inquiry and referring to geological data inconvenient. Using library management-attribute database management and utility-projection transformation modules of MapGIS and following the multi-source record card format of DGSS can reach the digitalization of geological, remote sensing, geophysical and geochemical data rapidly and load them into the library. In addition, it also provides a basic platform for geological, geophysical, geochemical and remote sensing data integration.
2015 Vol. 24 (3): 261-263 [
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264
TECHNOLOGICAL CONDITIONS FOR MINING IN THE WANDONGSHAN ORE BLOCK OF BEIYA GOLD MINE IN WESTERN YUNNAN
GUAN Zhao-de
In recent years, due to unclear mining technical conditions and improper exploitation, shaft submergence, mine collapse, geological disaster and environmental pollution happen frequently. The Wandongshan ore block of Beiya gold mine is without exception. With data collection, hydrological-engineering-environmental mapping, project recording, dynamic observation and sample testing, the hydrogeology, engineering geology, environmental geology conditions of Wandongshan ore block are ascertained, which provides basis for mining design and ensures safety in production. It is suggested that all mine enterprises fully recognize the urgency and importance of mining technological condition evaluation, so as to make sure safety production and environmental protection, and achieve good economic, social and environmental benefit at the same time.
2015 Vol. 24 (3): 264-270 [
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41
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184
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271
AEROMAGNETIC ANOMALY CHARACTERISTICS AND PROSPECTINF RFFECT OF DAXINGANLING REGION IN HEILONGJIANG PROVINCE
SHI Jian-min, CHEN Xing-shi, DING Ji-shuang
Using 1:50 000 high-precision aeromagnetic data, in combination with the regional geologic background, the authors analyze the aeromagnetic anomaly features in Daxinganling region. On the basis of geological, geophysical and geochemical data, as well as the distribution of deposits (ore occurrences) and ore-forming regularity, a group of aeromagnetic anomalies are selected. In the latest high-precision aeromagnetic map, the known iron deposits show distinct anomaly characteristics. With comparative study and comprehensive verification, one magnetite spot and several nonferrous metal occurrences are found. Based on the verification, the prospecting direction by aeromagnetic data in this area is pointed out.
2015 Vol. 24 (3): 271-276 [
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277
PRELIMINARY STUDY ON THE EVOLUTION AND METALLOGENY OF THE HEILONGJIANG DEPRESSION
ZHANG Dong-cai
The Upper Heilongjiang Depression, located in northern Daxinganling region of China, and the Russian Bureya Depression on the other side of Heilongjiang River, belong to the same Mesozoic fault basin filled with terrigenous detritus and sediments. The resources of oil, gas, coal, gold, silver, copper and some nonmetal minerals are distributed in the depression. With discussion on the formation, structure and volcanic activities, as well as their relationships to metallogenesis, this article carries out a preliminary study about the Upper Heilongjiang Depression.
2015 Vol. 24 (3): 277-280 [
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31
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281
PALEOMAGNETISM AND GEODYNAMICS OF THE MESOZOIC ZHURAVLEVKAAMUR AND KISELEVKA-MANOMA COMPLEXES IN THE NORTHERN SIKHOTE-ALIN
А. N. Didenko, А. I. Tikhomirova, А. V. Kudymov
2015 Vol. 24 (3): 281-282 [
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34
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315KB] (
178
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283
SPECIALIZED RADAR DATA PROCESSING FOR THE LOCATION OF LARGE GEOLOGIC TARGETS
G. Z. Gil'manova, O. V. Rybas, M. V. Goroshko
2015 Vol. 24 (3): 283-286 [
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23
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