Sains
Malaysiana 46(11)(2017): 2149-2162
http://dx.doi.org/10.17576/jsm-2017-4611-16
Non-seismic
Geophysical Prospecting Model of Beiya Gold Mine in Western Yunnan Province
(Model
Pencarigalian Geofizik Tak Seismik Lombong Emas Beiya di Wilayah Barat Yunnan)
JIAN
YANG1*, QIAO WANG1, SHENGXIAN LIANG1, JING GUO1 & MUHAMMAD
AQEEL
ASHRAF2
1Chengdu Center, China Geological
Survey, Chengdu 610081, China
2International Water, Air &
Soil Conservation Society, 59200 Kuala Lumpur, Federal Territory
Malaysia
Diserahkan:
25 Januari 2017/Diterima: 25 Mei 2017
ABSTRACT
According to the basic rules and characteristics of the
gold-polymetallic deposits of Beiya gold mine area in terms of mineralization
and ore controlling, it is concluded that skarn deposit is the main ore deposit
type in this area and the geological conditions are analyzed by the statistics
of the physical parameters. Then, the tectonic, rocks, stratum, ore geophysical
models have been treated by the forward modeling numerical simulation and the
results are analyzed comprehensively. Based on the forward modeling results,
combined with the relevant physical differences, the principle and exploration
method test and research for the comprehensive geophysical exploration technology
has been carried out, covering the induced polarization and magnetic
prospecting for the ore body as well as the indirect geophysical exploration
method by means of plane gravity data, audio-magnetotelluric sounding for rock
mass and tectonics, the mineralization mode-physical forward modeling -
geophysical exploration mode has been established and good results have been
achieved. Therefore, a location forecast method has been put forward for the
concealed skarn type Fe-Au deposit which is adaptive to the mineralized
geological background of Beiya and other similar areas.
Keywords: Beiya gold ore; forward modeling; prospecting model
ABSTRAK
Menurut peraturan asas dan ciri timbunan polilogam emas di kawasan
lombong emas Beiya daripada segi mineralisasi dan pengawalan bijih, dapat
disimpulkan bahawa timbunan skarn adalah timbunan bijih utama di kawasan ini
dan keadaan geologinya dianalisis oleh parameter fizikal statistik. Seterusnya,
model tektonik, batuan, strata dan geofizik bijih telah dirawat menggunakan
model ke hadapan simulasi berangka dan hasilnya dianalisis secara menyeluruh.
Berdasarkan hasil pemodelan ke hadapan, digabungkan dengan perbezaan fizikal
yang relevan, kaedah pengujian dan penyelidikan prinsip dan eksplorasi untuk
teknologi eksplorasi geofizik yang komprehensif telah dijalankan, meliputi
kaedah polarisasi teraruh dan pencarigalian magnet untuk jisim bijih serta
kaedah penerokaan geofizik tidak langsung dengan menggunakan data graviti
pesawat, bunyi magnetotellurik untuk jisim batuan dan tektonik, mod
mineralisasi - pemodelan fizikal ke hadapan - mod penerokaan geofizik telah
dibentuk dan keputusan yang baik telah dicapai. Oleh itu, kaedah ramalan lokasi
dikemukakan bagi mengesean timbunan skarn jenis Fe-Au tersembunyi yang mudah
sesuai dengan latar belakang geologi mineral di kawasan Beiya dan kawasan yang
sama.
Kata kunci : bijih emas Beiya;
model pencarigalian; pemodelan ke hadapan
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