The application of two (or more) global positioning systems offers many practical benefits. In recent times, outside the GPS, GLONASS system was developed, to meet the surveying, navigation requirements, so the GLONASS data processing has become necessary. In this paper, some GLONASS data of IGS sites have been processed by Bernese software. ...
5 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 673 | Lượt tải: 0
The Binh Dai Formation was established by analysis results of the BT3 borehole of KC09.06/06- 10 project, in Ba Tri commune - Binh Dai district of Ben Tre province. The sedimentary of Binh Dai Formation has identified Early Holocene age that was formed at the coastal estuarine environment ( ), distributed inside the borehole at the depth fro...
8 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 646 | Lượt tải: 0
Originating source of groundwater reserve is not only one of research speciality in hydrogeology, but also an important information for groundwater resources exploitation management and protection. Based on existing research results, this paper deals with analysing and determining main natural and artificial factors which have deciding role in f...
9 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 646 | Lượt tải: 0
In Vietnam, sericite has been interested in as a potential industrial material. This study discusses some issues on composition and characteristic of sericite following with clarifying concept of “sericite” in the international nomenclature of micas and suggests a name “di-vermiculit” (in Vietnamese) for main mineral of sericite. Some charac...
8 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 836 | Lượt tải: 0
Toc Tat manganese deposit is of neritic origin, the manganese ores were formed by sedimentary process and alterated by later weathering process. Using many modern methods, this research presents in detail geochemical-mineralogical characteristics of manganese ores in the Toc Tat area. The manganese minerals include pyrolusite, hollandite and ...
10 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 822 | Lượt tải: 0
The Cho Don lead-zinc deposits are situated at the southwest of Cho Don district, about 7 km from the centre. These deposits are sphalerite-galenitepyrite type, occured in middle Paleozoic terrigenous carbonate rocks. They are polymetallic vein type. Ore minerals consist of sphalerite, galenite, pyrite, chalcopyrite, pyrrhotite, arsenopyrite, ...
9 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 689 | Lượt tải: 0
By-products in lead-zinc ores are diversify, depending on ore types: Cho Don type - Cd, In, Ag, As, Cu, Sn, Ga ; Cho Dien type - Cd, In, Ag, Cu, Ga ; Lang Hich type - Cd, Ag ; Na Son type : Cd, Ag, Cu, Ga, REE. Detailed mineralogical investigation reveals that by-product elements are mainly associated with inclusions and isomorphous substitut...
10 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 636 | Lượt tải: 0
Potential field data usually contain noises and in the downward continuation these noises with high frequency are amplified strongly that mask all useful information of the original data. Consequently, the downward continuation maps are difficult to be interpreted. In this paper, we propose using a lineweight function (LWF) to eliminate the no...
6 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 656 | Lượt tải: 0
This paper presents results of fracture investigations in Northwest Vietnam using new inner-layer fracture analysis method and computer processing data. The fractures of sediments of different ages (from Precambrian to Quaternary) are messured and analysed. The studied results are presented by the stereograms for orientating distribution of th...
9 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 637 | Lượt tải: 0
This paper presents some preliminary results of building damage assessment due to earthquakes in Ho Chi Minh City. A methodology for urban seismic risk assessment was applied to six most typical building classes available in the 1 and 3 districts, downtown of the Ho Chi Minh City. GIS technology was used to develop a plausible earthquake scen...
10 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 700 | Lượt tải: 0
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