Section Ⅲ A Brief Introduction of Mineral Exploitation and Utilization of Tibet

宇智波泉2023-05-05  27

The exploitation and utilization of mineral resources in Tibet may be traced up to the beginning of the Christian eraTo improve the tools of pro-duction Tibetan people learned the iron and copper smelting techniques early in the 1st century under the reign of the Tibetan king ZhatriIn the early 7th century under the reign of Tarpo Sharsi,the 30th king of Tibet(during the Tang Dynasty),ploughs,spades and other iron-made tools were widely usedLater,for the decoration of Buddhas,temples and palaces gold and mineral pigments came into useThe history of Tibetan medicine began in the 4th cen-tury when many mineral medicines were usedThe book“Sibu Pharmacopoeia”published in 720 recorded the usage of boronIn addition,ex-ploitation and utilization of salt and peat for daily life,lead ores for making hunting guns,jade and gem stones for decoration,as well as that of kaolin can also be traced way back in history

Regular mineral exploitation based on geological prospecting started after the founding of New ChinaFrom late 1950s to 1960s Tibet exploited mainly coal and boron,sometimes on a extensive scaleThe mining areas were Tu-main for coal and the Baingoin Lake and Dujiari for boronThe exploitation of chromite and the development of geothermal resources commenced in the 1970s,when the Dongfeng chromite mine was established in Dongqiao of Am-do CountyThe Yangbajain geothermal power station was built and put into operation in 1977Meanwhile,cement limestone,placer gold,peat,gypsum,salt,granite,china clay,etcwere also mined in a minor scopeMining indus-try in Tibet has developed rapidly since the 1980sThe Dongfeng mine was shifted from Dongqiao to Lhobsa and the construction of the new mine startedA number of enterprises of the Shannan District,Qusum County and Lhasa City came to Lhobsa and set up their chromite mining branches,local or col-lectiveThe No2 Geological Party,the Geophysical Prospecting Party,and the township enterprises of the Qusum and Gongga Counties mined the chromite deposit in Xianggashan on the east of LhobsaThe advancement of mining industry in the Shannan District and its economic benefits had stimulat-ed the mining industry of Xigarze,Nagqu and some other placesIn Xigarze area,apart from chromite,boron was developed in the west partIn Nagqu area,chromite,placer gold,boron and lead-zinc deposits were the key tar-getsIn 1986 the“Law of Mineral Resources”and a series of the related rules and regulations were promulgated by the StateAccordingly,the People's Government of the Tibet Autonomous Region formulated local rules and regu-lations to bring the mining industry into the orbit of legal systemThe Region and the six subsidiary districts,cities and individual counties established the corresponding mineral resources management organizationsBy 1991,there were more than 10 state-owned and collective mining enterprises in the Re-gionWhen added in the privately owned ones,the total reached 38;of which 15 of chromite,7 of boron,2 of gold placer,6 of lead-zinc,3 of stibium,2 of coal,1 of iron,1 of limestone,1 of gemstone;others were of copper,salt,gypsum,tin placer,granite,peat,apatite,geotherm,etcMining has become the backbone industry in TibetIts proportion in the industrial output value of Tibet has distinctly increased,eg,68%in 1986,149%in 1987,225%in1988,34%in 1989,and 272%in 1991Mining industry had manifested its immeasurable effects and functions in the development of national economy and in the improvement of people's life in Tibet

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Abag Qi,CHXX0243

Acheng,CHXX0001

Aihui,CHXX0174

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Alar,CHXX0212

Altay,CHXX0196

Anda,CHXX0187

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Ankang,CHXX0394

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Youyang,CHXX0414

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In May 1951 the 17-Article Agreement on Measures for Peaceful Libera-tion of Tibet was signed by the Central People's Government and the Tibet lo-cal government,thus turned a new page in the history of TibetThe geological and mineral prospecting of Tibet began to embark on a brand new eraDuring the last 40 years works on geology and mineral resources of Tibet have experi-enced generally the following three stages:

(1)1951-1965

Shortly after its establishment,New China was facing the challenge of e-conomic recovery and developmentThe urgent needs of mineral resources by the socialist construction accelerated the geological and mineral prospecting at an unprecedented rateThe Central People'S Government paid much attention to Tibet which had just shook off the yoke of serf systemThe Bureau of Geol-ogy of Tibet was set up first from 1956-1957 and then reinstituted from 1960-1963 to strengthen the geological work of the regionThe number of staff and workers had reached a maximum of 1077 in the year 1956 and of 1119 in 1960After 1963,the Bureau had been disbanded with merely one geological party preserved under the Industrial Construction Bureau of Tibet,and the number of staff and workers decreased to 508Obviously it was far from equal to the task in such a vast areaDuring this stage geological work was limited to re-connaissance survey and ore occurrence inspection by use of single methodsThe important tasks accomplished are as follows:

In March 1951,nine geologists from the geological group of the Working Party of Tibet affiliated to the Chinese

Academy of Sciences(CAS)headed by ProfLi Pu arrived in Tibet to carry out geological reconnaissance survey and mineral investigationThey started in the east from the Jinsha River,passing through Qamdo,Dengqen,Bomi,Lhasa,Xigarze to Tingri;in the south they reached the Yarlung Zangbo Riv-er;and in the north they reached Nagqu and further westward to Lunpola and the Qilin LakeThe tour lasted for 18 months,covering a distance of 18000 km,and was completed with a wealth of geological data which were later re-flected in their book“Geology of eastern Tibet and the materials of mineral in-vestigation”that enlightened further geological and mineral investigations of the region

In 1950s,the Qinghai Petroleum Prospecting Party under the Petroleum Department of the MGMR launched in the lake area of northern Tibet an oil-aiming regional geological survey scaled 1∶1 000000,covering an area of 112000 square kilometersIn 1956,a subparty was send out by the Southwest China Bureau of Geology in search for chromite in Dengqen of northeast TibetThe Xinjiang Bureau of Geology inspected coal,iron,mica and others in Ngari of western TibetIn 1955,the Geological Institute of the CAS carried out geo-logical reconnaissance survey along the Yarlung Zangbo RiverThe Coal Geol-ogy Party,the Zangbei(northern Tibet)Geological Party and the Zangnan(southern Tibet)Geological Party affiliated with the successive Bureaus of Ge-ology of Tibet launched respectively the coal-aiming geological prospecting in Tumain,Lhasa,and Zetang-Xigarze;and the boron-dominated reconnaissance of salt lakes in Baingoin,Dujiari and elsewhere in northern TibetTheir ef-forts also led to the discovery of the chromite deposit in Lhobsa of southern Ti-bet and the Jiamachikang copper-lead-zinc polymetallic deposit in Maizhukung-gar

In early 1960s,the Geological Party of Tibet inspected the ore occur-rences of iron,coal,copper,sulfur,arsenic,salt in eastern Tibet;and carried out reconnaissance surveys on polymetals and kaolin nearby Lhasa,on gold placer,mica,rock crystal in southern Tibet,and on coal and chromite of northern TibetMeanwhile,a lot of trenching and some pitting,drilling and geophysical prospecting were operated

All the above work had produced remarkable effectsThe boron deposits of Baingoin and Dujiari were exploited to a large extent in 1958-1961,making important contributions to the nation by yielding in a three years'time a total of 196600 tons of raw boron and 27260 tons boron of concentratesThe coal field in Gela of Tumain was mined and utilized by local enterprisesThe dis-covery of Lhobsa chromite deposit provided the earliest basis for a reconnais-sance assessment of the deposit

(2)1966-1978

During this period,though inferfered by the so-called“Cultural Revolu-tion”,geological work in Tibet had not been much affectedQuite a number of significant results were achieved,and the staff was remarkably increased

In 1966-1 967,three professional contingents of chromite,coal and petroleum geology were transferred from inland China to Tibet and were reor-ganized to form the No2,No3 and No4 Geological Parties of the regionAdded with the originally preserved party,there were altogether four geologi-cal parties in TibetThe staff reached 2842 and was well equipped and coordi-natedThus the geological work of the region was significantly enhancedIn July 1972,for the third time the Tibet Bureau of Geology was re-set up to re-inforce the organization and administration of geological prospectingUp to 1978 it had eight subordinate units with a staff of 5961

The 1∶1000000 scale regional geological survey of Tibet was carried out in 1974 by a specialized party on the basis of a regular map sheet,marking a good start of the basic geological work of TibetIn the mineral prospecting field,the No2 Geological Party of Tibet had successively assessed the Dongqiao chromite deposit of Amdo in northern Tibet and the Lhobsa chromite deposit in southern Tibet,which were later provided to industrial departments and local enterprises for exploitation and have yielded remarkable economic re-turnsThe No1 Geological Party of Tibet had discovered and assessed the su-per-large Yulong porphyry copper deposit,in which the associated metallic minerals were also of commercial valueMeanwhile,in the surroundings of Yulong the party assessed successively the Malasongduo and the Duoxiasong-duo large-scale copper deposits and found 10 smail deposits and occurrences of copperAs a result,a NE-SW striking 400 km long porphyry copper belt was ascertained to have a very promising prospect of mineral resources,which was also of very important nationwide significanceAt the same time,the No1 Geological Party assessed the medium-size Kargang metasedimentary deposit in Zhag'yab County,the medium-size Jiaduoling porphyritic deposit in Jamda County,and the small coal fields in Machala of Riwoqi County,Qigaila of Dangjue County,and in Kagong of Zhag'yab County respectivelyThe No5 Geological Party of Tibet assessed the large Dam Qu magnesite deposit found by the Regional Geological Surveying Party in Bangyuan village of Amdo County

To meet the demands on electricity of the Lhasa City,the Comprehensive Geological Party(later the Regional Geological Surveying Party)and the Geo-physical Prospecting Party conducted successively in 1973 and 1974 geophysi-cal survey in the Yangbajain geothermal field of Damxun CountyBased on the low-resistivity anomalies the No3 Geological Party of Tibet started drilling in 1975 and found the high-temperature and high-pressure geothermal flowTo strengthen geothermal prospecting,the Tibet Bureau of Geology established the Geothermal Geological Party,which launched later an extensive geological prospecting and geothermal resources evaluation in YangbajainIn 1977,the industrial departments in Tibet began to construct power stations in Yangba-jian and step by step they increased the scope of development and the produc-tion of electricityHence the shortage of electricity of the Lhasa City has been greatly alleviated

(3)1979-1991

During this period China entered a new era of reform and opening-up and economic transformThe contingent of the Tibet Bureau of Geology experi-enced a process from development to concentrationIn 1979,the number of staff and workers reached a maximum of 6300,and the maximum drills operat-ed amounted to 1 4 per yearLater,these figures decreased year after yearBy the end of 1991 the number of staffs was 2540,half of which were Tibetans and about one third of which were professionalsThe geological parties were reduced from 8 to 7Despite of these changes the working and research level were significantly heightenedIn 1984,the 1∶1000000 scale regional geologi-cal survey was completed,which filled up the final gap in the regional geologi-cal survey on the same scale for the land area of the countryAnd,with the strong support from the State Planning Commission and under the guidance of the MGMR,through tender-inviting,several professional parties were intro-duced to Tibet to perform the extensive 1∶200000 scale regional geological survey and the 1∶200000 and 1∶500000 scale regional geochemical surveyThus the coverage of regional geological survey reached 163000 square kilome-ters,and that of regional geochemical survey—408000 square kilometersThis was an unprecedented practice in the history of geological work in Tibet in terms of scope,methodology,speed,demands and quality,and was also rare in the countryIt had led to the upgrading of the geological work and re-search level in Tibet and,consequently,resulted in the discovery of thousands of geoehemical anomalies and mineralization occurrences as well as the delin-eation of about 200 target areas of various mineral resourcesThrough follow-up for anomalies and inspections of ore occurrences,tens of important mineral deposits and prospecting bases were establishedThe books“Regional geology of Tibet”and“A summary of mineral resources of Tibet''completed respec-tively in 1989 and 1991 by the Regional Geological Surveying Party summed up comprehensively for the first time the geotectonic features and mineral re-sources of Tibet,while the“Map of plate tectonics-formations of Tibet,scaled 1∶1500000”(Geological Institute of Tibet,1989)and the“Map of ophiolites and terrane structures of the Himalayas and its surroundings”(Regional Geo-logical Surveying Party of Tibet,1990)described the geological structures and evolutional characteristics of Tibet with advanced theories and viewpoints

With respect to mineral prospecting,during this period,stress was placed on chromite,gold,copper,lead-zinc,boron,geothermal resources,gem stones,etcand a number of marked achievements were obtainedAfter com-pletion of the detailed survey and exploration of the Lhobsa chromite deposit,the No2 Geological Party evaluated in 1989 a medium-size chromite deposit in the Xianggashan area located in the middle of the Lhobsa massif,which was mined later by a local enterprise and the party itselfThe No1 Geological Par-ty and the Geophysical Prospecting Party evaluated and submitted in 1982-1985 a medium-size salt deposit in Youzha of Gonjo County in eastern TibetThe No6 Geological Party evaluated in 1980 a large-size corundum deposit in Nianggui of the Qushui County and discovered in 1985 the large-scale Yincuo amethyst deposit the Baingoin CountyThe No5 Geological Party made a great breakthrough in the searching for placer goldAfter years'efforts they found eventually a large placer gold deposit in Bungnazangbo of Xainza Coun-tyThe report was submitted in 1993Besides,the party also discovered and assessed a large boron deposit in Marmi Co of Gerze CountyThe No6 Geo-logical Party also made remarkable progress in search of copper-dominated polymetals in Jiamachikang of the Maizhokunggar County and found a very promising stibium belt on the west of Amdo,northern TibetAfter assessing the Yangbajain shallow heat reservoir in 1984,the Geothermal Geological Par-ty,in cooperation with the Geophysical Prospecting Party,completed in 1988the evaluation of the geothermal field in NagquNow a power station has been established and put into productionIn addition,the two parties also submit-ted for exploitation and utilization in 1991 an evaluation report on the high-temperature geothermal resources of YangyiIn all,this period marks an im-portant stage with magnificent progress in basic geology and mineral explo-ration of Tibet

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