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2014 Vol.23 Issue.3,
Published 2014-06-30
205
2014 Vol. 23 (3): 205-207 [
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SUMMARY OF THE RESULTS OF REGIONAL GRAVITY AND GEOCHEMICAL SURVEY OF LAND RESOURCES IN NORTHEAST CHINA
LIU Chi, YANG Chun-cheng, MA Zhi-shu, LIU Xi-yao, DAI Hui-min, FENG Jing
Since 2000, with increased requirements for regional gravity survey technique and renewed regional geochemical exploration methods and technology, the level of basic geological work in Northeast China has greatly improved and many gravity anomalies have been found. Concealed rocks, basins and faults have been delineated and inferred. Especially through the regional geochemical exploration, abundant geochemical anomalies have been recognized, which reflect the true geological rules, provide more metallogenic prospective areas and target areas and find many mineral deposits. With the first round of multi-purpose regional geochemical survey, the regional geochemical distributions of soil elements are ascertained. The soil environment in Songliao Plain is confirmed as good quality. These results provide abundant geophysical and geochemical information for the geological work in Northeast China.
2014 Vol. 23 (3): 208-214,229 [
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215
NEW UNDERSTANDING OF THE LOWER CRETACEOUS LONGJIANG FORMATION IN THE EASTERN DAXINGANLING REGION
DING Qiu-hong, CHEN Shu-wang, SHANG Ling, LI Yong-fei, WANG Jie
On the basis of field survey, the stratotype section of Longjiang Formation is researched particularly on the lithostratigraphy, biostratigraphy, isotope chronology and lithogeochemistry. The meaning of Longjiang Formation is redefined. The neologism of Longjiang Formation consists of andesite and dacite with its pyroclastic rocks, rhyolitic pyroclastic rocks and sedimentary clastic rocks. The paleontological fossils belong to Eosestheria-Lycoptera-Ephemeropsis trisetalis fossil assemblage of the Middle Jehol Biota. Among them, Conchostracans are represented by the Eosestheria opima-E. (Dongbeiestheria) guanghuaensis assemblage. The volcanic lithogeochemistry is characterized by SiO
2
contents between 63.88% and 75.65%, high Al
2
O
3
(12.19% to 19.39%), high Na
2
O (1.04% to 5.24%), rich alkalis (Na
2
O+K
2
O 3.65% to 6.25%)and strong enrichment in light rare earth elements(LREE). The isotopic age of
40
Ar/
39
Ar is 125.4±1.8 Ma.
2014 Vol. 23 (3): 215-221,234 [
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222
MINERALIZATION AGE OF THE SIGNIFICANT LEAD-ZINC POLYMETAL AND MOLYBDENUM DEPOSITS IN SOUTHEASTERN XIAOXINGANLING METALLOGENIC BELT
SHAO Jun, YANG Hong-zhi, JIA Bin, PENG Ming-sheng
The southeast of Xiaoxinganling metallogenic belt is one of the significant concentration areas for Pb-Zn polymetal and Mo metallogenesis in Northeast China. The mineralization is closely related to the intrusion of granitic magma. The Pb-Zn deposits genetically belong to skarn polymetal ore type; while the Mo deposits, porphyry type. The zircon U-Pb dating for typical deposits shows that the Pb-Zn mineralization ages range between 175.8 and 209 Ma; while the Mo mineralization, 176±4 Ma. It is thus suggested that the Pb-Zn mineralization age is Late Indosinian-Early Yanshanian, and Mo mineralization is Early Yanshanian.
2014 Vol. 23 (3): 222-224 [
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225
THE IDENTIFICATION OF OIL SHALE LOGGING OF THE FIRST MEMBER OF NENJIANG FORMATION IN NORTHERN SONGLIAO BASIN
HU Xia, WANG Yu-hang
Based on the logging data of Northern Songliao Basin, the response characteristics of the oil shale of the first member of Nenjiang Formation are summed up. With optimization parameters, adopting the depth of 700 m as boundary, the identification charts for the oil shale logging are established. With the accuracy up to 72.4% and more, the identification provides a basis for the oil shale exploration and development in Northern Songliao Basin.
2014 Vol. 23 (3): 225-229 [
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ANALYSIS ON THE METALLOGENIC CONDITION AND PROSPECTING DIRECTION OF THE URANIUM DEPOSIT IN JIANXING AREA, HEILONGJIANG PROVINCE
XI Hai-yin, FANG Dong-yu, WU Da-kun, ZHANG Yang
Based on the research of the metallogenic conditions of uranium in the Jianxing area, including the source of uranium, tectonic setting, lithology/lithofacies, sand bodies and hydrogeology, the characteristics, genesis and distribution of uranium mineralization are discussed. It is concluded that the Upper Jurassic Jianxing Formation and the Lower Cretaceous Taoqihe Formation are the main targets for sandstone-type uranium prospecting. The sandstone-type of uranium deposits in the area are mainly formed by synsedimentation with epigenetic infiltration. The favorable metallogenic positions are the eastern side of basement uplift near the provenance areas with harbor sedimentary condition. The area from the western margin of Baoshan depression to F
1
fault is the prospective area.
2014 Vol. 23 (3): 230-234 [
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235
DISCUSSION ON THE FORMING ENVIRONMENT AND ORIGIN OF THE INTRUSIVE ROCKS IN XIFENG AREA, LIAONING PROVINCE
WANG Zhong-jiang, ZHAI Fu-rong, WANG Qi, XIE Shao-qiang, GUO Hong-fang, ZHONG Mi-shan, CHEN Yao
The intrusive rocks in Xifeng area, Liaoning Province, formerly called Xifeng intrusive body, are component parts of the Bureya-Zhangguangcailing giant granite belt, which recorded the essential information of evolution process of the orogenic belt from the Paleo-Asian oceanic plate subduction, through ocean basin closure to accretion orogeny. Presently, the Xifeng intrusive body has been disintegrated and reassigned into four intrusion stages, including 11 intrusion orders, and referred to as the intrusive rocks in Xifeng area. On the basis of the new division, forming temperature-pressure condition, tectonic environment, material sources and origin of the rocks are further discussed. The intrusive rocks of the first- and second-order of Early Permian and the first-order of Middle Jurassic Epoch belong to I-type granite. The intrusive rocks (diorite porphyry) of the third-order of Late Cretaceous are also I-type. Their material source is mainly from the remelting of magmatic rocks in the crust. The intrusive rocks of the other orders are S-type granite, with main material source from the remelting of sedimentary rocks in the crust. The intrusive rocks of the first-order of Early Permian are plutonic rocks of the volcanic arc; while those of the second-order are the transition type between volcanic arc and syn-collisional. The intrusive rocks after that are syn -collision or post -collision type granites. These characteristics are basically consistent with the evolution sequence of subduction, closure and accretion orogeny of the Paleo-Asian ocean plate.
2014 Vol. 23 (3): 235-241 [
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242
ANALYSIS ON THE LITHOFACIES AND PALEOGEOGRAPHY OF LIAONING PROVINCE IN BENXI AGE-SHANXI AGE
ZHANG Yong, QU Hong-xiang, TAN Wen-gang, WANG Zhi-jun
The sediments of Benxi Age-Shanxi Age of Liaoning Province are distributed mainly in the Taizihe stratigraphic sub-area, with a few in Dalian stratigraphic sub-area and sporadically exposed in Jinzhou, Chaoyang, Lingyuan and Huludao areas of Western Liaoning. Based on the characteristics of lithological association, sedimentary structure, facies fossils and sedimentary minerals, the sedimentary environment of this period is subdivided into three sedimentary facies, i.e. delta, barrier coast and gulf shelf. A further analysis on the lithofacies and paleogeography of this period is then conducted.
2014 Vol. 23 (3): 242-245 [
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246
A GENERAL REVIEW OF THE LITHOFACIES AND PALEOGEOGRAPHY IN WESTERN LIAONING DURING CHANGZHOUGOU AGE TO TUANSHANZI AGE
GENG Zhi-hong, QU Ruo-da, WANG Ran, TAN Wen-gang
The deposition during Changzhougou Age to Tuanshanzi Age of Changcheng Period, started from the terrigenous clastic rock foot-plate and ended by the stable carbonate rock platform, forms a complete transgression-regression cycle in Western Liaoning Province. Based on the analysis of rock assemblage, sedimentary structure, index trace elements, paleosalinity and rare earth element ratio, a regular change of sedimentary facies is found. The river delta facies is developed in the early stage; the non-barrier coast facies and shallow sea shelf facies in the middle stage; while the barrier coast facies, open platform facies and restricted platform facies, the late stage.
2014 Vol. 23 (3): 246-250 [
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ACHIEVEMENT AND SIGNIFICANCE OF THE DEEP PROSPECTING IN THE XIAOYANGGOU IRON DEPOSIT IN BENXI, LIAONING PROVINCE
ZHANG Ya-nan
According to drilling data, the Xiaoyanggou iron deposit is composed of stratified orebodies, which are characterized by deep burial, large thickness, multiple layers and medium dipping angle, with 140 million tons of low grade magnetite reserves. The altitude of buried orebodies ranges from -100 to 838 m above sea level, with monoclinic layered shape, stable thickness, continuous mineralization and even grade. The composition of ore is simply dominated by magnetite with felsic gangue. The ores are in granoblastic and oxidation replacement textures, with fine banded, wrinkle or breccia structures. The genetic type of the Xiaoyanggou deposit belongs to volcanic-sedimentary metamorphic iron deposit. The deep prospecting achievement not only increases the resources in the area, but also provide a reference for the exploration in surrounding areas.
2014 Vol. 23 (3): 251-255 [
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PRELIMINARY DISCUSSION ON THE GEOCHEMICAL PROSPECTING MODEL FOR THE WENGQUANGOU IRON-BORON DEPOSIT IN LIAONING PROVINCE
WEN De-juan, TENG Shou-ren
With analysis and sum-up of the regional geology, geochemistry and mineral resources of the Wengquangou ironboron deposit in Liaoning province, the geological-geochemical prospecting model for the marine volcanic-sedimentary metamorphic type of deposit is preliminarily established as follows:The Lieryu Formation, Liaohe Group of Paleoproterozoic Erathem is the boron-bearing formation with a stable horizon, high metamorphic degree, intensive magmatic activities and complicated structures. The anomaly assemblage of B, MgO and Fe
2
O
3
appears in the orefield and areas with similar geological background. Each element has significant concentration centers in the high-value areas, but the zonation between difference elements is not so clear. The anomalies of B and Fe
2
O
3
around the deposit are well coincided, which is the geochemical prospecting indicator in the area. However, the association of B and MgO is relatively unfamiliar. The establishment of the geological-geochemical prospecting model provides an important basis for the delineation of prospective areas, choice of targets and estimation of resources of the deposits of the same type.
2014 Vol. 23 (3): 256-260 [
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ANALYSIS AND FORECAST ON TYPICAL GEOLOGICAL DISASTERS IN NANFEN, LIAONING PROVINCE
SHAO Hui-wen, ZHANG Lin, GUAN Shu-ye, WANG Tian-yi
Nanfen District of Benxi City, located in the mountainous area of Eastern Liaoning Province, is the main geological disaster-prone area of the province. Geoanalysis, combining with quantitative and semi-quantitative analysis, is applied to study and evaluate the disaster-inducing factors of two major geological disasters, Jiguanlazi collapse and Gunmaling debris flow. The result reveals the formation and evolution of the disasters. The corresponding suggestions for the prevention of disasters are put forward.
2014 Vol. 23 (3): 261-265 [
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STUDY OF THE LATE PLEISTOCENE EOLIAN SEDIMENTS AND WUERJI FORMATION IN THE AREA FROM NORTHERN LIAONING TO SOUTHEASTERN INNER MONGOLIA
ZHAO Chen, LI Dong-tao, LIU Jin, PENG You-bo, LI Yu-chao, ZHOU Li-ping
Based on the results of the latest OSL tests and fossil occurrences, the time of Wuerji Formation is judged as Middle Pleistocene. Lithologically, the Wuerji Formation is dominated by grayish-yellow sand and sand loam, developed with porosities, columnar joints and irregular ginger-like calcareous concretions. The strata are mainly distributed in Baiyinhua area in Tongliao City, Inner Mongolia, as well as in Jiumiao area in Fuxin City, Liaoning Province. The Upper Pleistocene eolian sediments are composed of mainly yellowish-brown fine slit and dark gray silt, with weak consolidation and developed columnar joints, but without ginger-like calcareous concretions. These strata are distributed mainly in the north of Hure Qi and Horqin Zuoyi Houqi of Inner Mongolia.
2014 Vol. 23 (3): 266-271 [
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THE DISCOVERY AND GEOLOGICAL IMPLICATION OF THE LATE PALEOZOIC GEGENAOBAO FORMATION IN ZHALANTUN AREA, INNER MONGOLIA
ZHANG Yu-jin, WU Xin-wei, YANG Ya-jun, JIANG Bin, GUO Wei
During the regional geological survey, the Gegenaobao Formation, which had been regarded as the Lower Permian Dashizhai Formation, was discovered in Zhalantun of Inner Mongolia. The strata are NE striking, Late Carboniferous-Early Permian in age, with rock association of andesitic lava, intermediate pyroclastics and normal clastics, containing animal and plant fossils, to be a volcanic-sedimentary rock series of paralic facies. This formation is firstly found in Zhalantun area. The discovery is importantly significant for basic geological study, such as tectonics and stratigraphic division.
2014 Vol. 23 (3): 272-275 [
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DEPOSIT TYPE AND PROSPECTING DIRECTION OF THE ZHULAZHAGA GOLD DEPOSIT IN INNER MONGOLIA
ZHANG Wei-xin, MA Dan, QIN Xiang-hong, ZHANG Dao-kuo
Study on the regional geology, metallogenic condition and deposit characteristics shows that the Zhulazhaga gold deposit is controlled by the strata of Agulugou Formation, Zhaertaishan group, Mesoproterozoic Erathem. The orebodies generally occur as layers along the beds, consistent with the occurrence of the ore-controlling strata. It is considered that the gold deposit belongs to stratabound type. The key area of ore prospecting is on the west of the deposit. Regionally, the Mesoproterozoic strata in Wulanneihasha-Zhulazhagamaodao-hubuhaote area are the likely prospecting targets.
2014 Vol. 23 (3): 276-279 [
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STUDY ON THE ORE POTENTIALITY OF THE XIAERPU GRANITE IN WESTERN JUNGGAR, XINJIANG
XING Li-ping
The Late Paleozoic Xiaerpu granite is the most important intrusive body in the post-collision granite belt developed along the Darbute fault in West Junggar, Xinjiang Region. Based on the study of geochemistry and petrochemistry, combined with tectonic setting, magmatic rocks and other metallogenic factors, the relationship between the characteristics of the Xiaerpu granite and mineralization is recognized. It is revealed that the ore-host rock is rich in aluminum, calcium and magnesium. The rock body belongs to calc-alkali quasi-aluminous or peraluminous I-type granite.
2014 Vol. 23 (3): 280-283 [
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CHARACTERISTICS OF FLUID INCLUSIONS OF THE DAMOGOU-NAOYANGPING FLUORITE DEPOSIT IN SHAANXI PROVINCE
HAN Peng-fei, YANG Xing-ke, ZHANG Wen-gao, FAN Pei-he
The Damogou-Naoyangping fluorite deposit of Shaanxi occurs in the secondary fractures of the regional east-westtrending fault F
1
. The metallogenesis can be divided into four stages, i.e. Ⅰ) giant calcite crystal stage; Ⅱ) coarse-grained fluorite-calcite fluorite-quartz fluorite stage; Ⅲ) quartz sulfide (sphalerite) stage; and Ⅳ) calcite veinlet-fluorite veinlet stage. The result of petrographic observations indicates that, the inclusions are mainly of gas-liquid two-phase, pure gas phase, pure liquid phase, CO
2
-H
2
O three-phase and daughter mineral-bearing type. Microthermometry reveals that the homogenization temperatures of fluid inclusions in fluorite of Damogou deposit range from 290 to 340℃, with salinities from 0.5% to 6.16%(NaCl eqv.). The gas-liquid two-phase fluid inclusions in fluorite yield trapping pressures of 22.072-25.089 MPa, corresponding to a depth of 776.3-1268 m. The homogeneous temperatures of fluid inclusions of Naoyangping deposit are between 289 and 329℃, with a high salinities. The variation of salinity can be used to infer the migration direction of fluid. In the process of fluid migration, the abrupt reduce of pressure in the brittle structural fissures may result in hydrothermal boiling.
2014 Vol. 23 (3): 284-287 [
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288
ECOGNITION OF THE LITHOLOGY OF VOLCANIC ROCKS IN SONGLIAO BASIN BY SUPPORT VECTOR MACHINE
LIU Cheng-zhi, TENG Li-hui
Using the method of support vector machine (SVM), with selection of characteristic elements, an identification method for the lithology of volcanic rocks is established to distinguish the basaltic, andesitic, trachytic, dacitic and rhyolitic volcanic rocks. By learning and prediction of the volcanic rock samples from the Songliao Basin, the average recognition rate for volcanic rocks reaches to 95% and more, showing that the SVM obtain a good result in the identification of volcanic rock component.
2014 Vol. 23 (3): 288-291 [
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APPLICATION OF X-RAY FLUORESCENCE SPECTROMETRY IN THE MULTI-ELEMENT TEST OF BARITE
ZHOU Guo-xing, ZHAO En-hao, YUE Ming-xin, CAO Dan-hong, XIAO Gang, ZHANG Quan
With sampling preparation by glass fusion, an X-ray fluorescence spectrum (XRFS) analysis method is established for multi-element test in barite. Preparing 0.5000 g of sample for test, mixing it with 5.000 g of special flux for XRFS, and melting the mixture in the high-frequency bead maker in 1150℃ for 8 minutes, then cooling the sample to room temperature in dryer, finally weighing the accurate mass of the glass. With computer test, to get the data of the element contents in the glass. The actual element contents of the sample is finally obtained by conversion. The theoretical α-coefficient method and empirical coefficient method are adopted for regression calibration of the absorption enhancement effects between the coexisting elements. The tested relative standard deviation of this method for each element in barite ranges from 0.2% to 4.7%, with a detection limit between 3.3×10
-6
and 170.6×10
-6
. A reasonable result is obtained for the tested data compared with the national standard material.
2014 Vol. 23 (3): 292-295 [
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A REVIEW OF TECHNOLOGY FOR GEOLOGICAL HAZARD PREVENTION AND REDUCTION
WEN Shao-yi, LI Yang
China is among the countries with most serious geological hazards. Many have studied on how to prevent or reduce the impact of geological hazards. The technology for geological hazard prevention and reduction involves four aspects:monitoring, prediction and early warning, risk assessment and risk management. With summarization of the studies on the technologies both in China and abroad, the current development and existing problems in the field are analyzed.
2014 Vol. 23 (3): 296-300 [
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PROCEDURE AND MEASURES OF THE GEOLOGICAL SURVEY ON MINED-OUT AREA
YAO Gai-wei
In order to guarantee the authenticity of the comprehensive result of the geological survey in mined-out area, this paper analyzes and summarizes the work procedure and measures. Based on the preliminary definition and classification for the mined-out areas, according to the relevant requirements by the investigation work, seven steps are suggested to carry out a comprehensive geological survey.
2014 Vol. 23 (3): 301-304 [
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305
GEOLOGICAL CHARACTERISTICS AND METALLOGENIC REGULARITY OF THE PORPHYRY COPPER DEPOSITS IN CHILE
HE Ming-sheng, TANG Ke, ZOU Gan-sheng
Chile is well known for its porphyry copper deposits in the world, with the world's largest Chuquicamota and El Teniente deposits of such type, distributed mainly in San Diego-Iquique region, where earthquake, volcanism and intrusion is seriously intensive. The metallogenic epoch is from Early Cretaceous to Paleogene. With study on the regional geology of Chile porphyry copper deposits, as well as metallogenic conditions and geological characteristics of three typical deposits, it is found that the mineralization of Chile porphyry copper deposits is closely related with multi-stage magmatism, distributed in north-south-trending belts and occurring in groups, with new metallogenic epoch, shallow bury and large reserves. The porphyry copper metallogenic model by Lowell-Guilbert and the diorite model by Hollister play important roles in the exploration of Chile porphyry copper deposits.
2014 Vol. 23 (3): 305-310 [
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