Font Size: a A A

Study On The Metallogenic Model Of The Tangjiaping Molybdenum Ore Deposit From Shangcheng County, Henan Province

Posted on:2008-03-25Degree:MasterType:Thesis
Country:ChinaCandidate:Z Q YangFull Text:PDF
GTID:2120360212483551Subject:Geological Engineering
Abstract/Summary:PDF Full Text Request
Tangjiaping molybdenum ore deposit, located in Shangcheng county, Henan province, were found recently. This finding is a punch for endogenic metal ore deposit prospect. However, the deposit have not been studied systemically hitherto. The distribution, petrological characteristics, geochemical characteristics and the age of ore-hosting granites were studies in this thesis. The forming model and magmatic source of these rock bodies were studied based on analyses of their tectonic environment and areal geological dynamics. The relationship between wallrock alteration and molybdenum mineralization were studied through analyses the type and zonation of wallrock alteration and it was realized that there is a close relationship between molybdenum mineral mineralization and network-like silication as well as potash feldspathizationGeological characteristics of Tangjiaping deposit were studied and control factors of them were analyzed and mineralization period and phase of them were also produced. The elemental zoning sequence of the deposit in cross direction (from inner to outer) is Mo-Bi-Ag-W-Sn-Pb-Zn-Cu and that in axis direction is Mo-Ag-Pb-Zn-Cu-Bi-W-Sn. The gradual decrease of elemental pairs and accumulating multiplication from the head to the tail of ore bodies was used to recognize ore bodies or not ore bodies or denudation degree of a ore body, which would be a criterion for prospecting deep ore bodies.The Re-Os ages of tangjiaping molybdenum ore deposit, Tanmugou molybdenum ore deposit, Dayinjian molybdenum ore deposit, are 113.1 ±7.9 Ma (early cretaceous), 121.6 ± 2.1 Ma, and 122.1 ±2.4Ma respectively. As a result, the age of molybdenum ore zone of Dabie Mountain is 122.1 ±2.4 ~ 113.1 ±7.9.The studies on trace elements, REE, isotopes of H, O and S, and fluid inclusions show that the ore fluid in the zone was high-salt waterwater from initial magma (some rain water mixed into this water lately) and that the origin of these ore material was the molybdenum-rich magma which came into being from the remelted crust beneath the metamorphic rock series of proterozoia. The genetic model, geological and chemical-geophysical prospecting sign were produced and 3 metallogenic prospect districts were given, which showed the direction for prospecting molybdenum ore deposit.
Keywords/Search Tags:Tangjiaping molybdenum ore deposit, Re-Os isotopic age, metallogenic pattern, metallogenic prospect districts
PDF Full Text Request
Related items