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Chinese Geology University (2006)

Study On Hypergene Geochemistry And Exploration Methods And Technologies In The Cold And Arid Deserta Landscape Area

Yu Jin Song

Titre : Study On Hypergene Geochemistry And Exploration Methods And Technologies In The Cold And Arid Deserta Landscape Area

Auteur : Yu Jin Song

Grade : Doctoral Dissertation 2006

Université : Chinese Geology University (Beijing)

Résumé partiel
Over the years, the alpine arid desert landscape geochemical exploration methods used different technologies to solve different geochemical anomalies interference response received regional geochemical anomalies masked, weakening or geochemical anomaly distribution law is difficult to ascertain. Soil, stream sediment, aeolian research object, the table of the elements Geochemistry, identify aeolian geochemical anomalies interference, the development of suitable alpine arid desert landscape area geochemical exploration methods technology. Studies have shown that the alpine arid desert landscape area soil and stream sediment is greater than 40 mesh coarse cuttings, affecting its element geochemical distribution of the main factors for which the geological background and elements of their geochemical properties, aeolian sand interference is very small ; serious interference of fine particles of less than 80 mesh part by a large number of mixed eolian sand supergene geochemical distribution of the impact that caused the exception disappear, weakening or uplift background is rooted from the aeolian sand advantage fraction (-80 mesh), the convergence of the mineral. Stream sediment in the water under the action of the natural mineral separation showed a trend of heavy minerals to -80 mesh of fine particles tend to move together with the corresponding element emerged was also found increased gradually from coarse to fine-grained level content, heavy minerals is an important carrier of the elements along the River migration ;, Ag, Pb, Bi, Sb mainly occurs non-magnetic heavy minerals, Zn, Cu mainly occur in the electromagnetic heavy minerals, Fe, Ni, Co mainly occurs strong magnetic heavy minerals ; deposits with more than small-scale, the migration distance of the main ore-forming elements in the main abnormal water systems are usually up to 4 to 5 km, water removal form the mineral separation, so that part of the main mineralization element anomalies larger extension to the downstream river system, to some extent affected the spatial distribution of elements geochemical anomalies. Based on the purpose of the different stages of the research results and geochemical exploration, the study concluded geochemical exploration methods and techniques suitable for the alpine arid desert landscape area : 1/20, 000 regional geochemical prospecting stage to stream sediment sampling media, basic sampling density 1:00 / 4km2 sampling fraction -10 80 mesh can effectively rule out the the aeolian interference, obtain bedrock geochemical characteristics close to the sink in the waters of information ; abnormal tracking phase should conduct a 1/50 000 stream sediment survey, the basic sampling density of 4 to 8:00 / km, sampling grain -10 to 80 mesh, rapidly shrinking prospecting targets ; anomaly inspection phase soil geochemical survey methods can be used, the area of ??measurement sampling density from 50 to 100 points / km2 profile measurement Dot pitch 50m, at least three sections, collecting the upper part of the bedrock regolith soil sampling grain -10 to 80 mesh.

Mots clés : cold and arid deserta, elements, hypergene geochemistry, exploration methods and technologies

Présentation (Dissertation topics)

Page publiée le 19 avril 2013, mise à jour le 24 avril 2018