Background

hydrothermal sedimentary large

Sea-level changes and hydrothermal sedimentary ...

The maximum flooding period also coincided with the intensified regional tectonism, extensive deep magmatism and hydrothermal sedimentation, which provide, for the formation of large to superlarge hydrothermal sedimentary deposits through the rapid accumulation of hydrothermal sediments, the needed dynamics, ore-forming materials and favorable ...

Sea-level changes and hydrothermal sedimentary ...

Sea-level changes and hydrothermal sedimentary mineralization of large-superlarge ore deposits among Sinian to Triassic in South China March 2003 …

Hydrothermal formation of heavy rare earth element …

However, lesser-known hydrothermal deposits of heavy REE (HREE)–enriched xenotime (YPO 4) also occur within sedimentary basins (e.g., Rabiei et al., 2017). Given the low aqueous solubility of xenotime, it has been unclear if REEs are in fact transported in large quantities at basinal temperatures or if high-temperature magmatic-hydrothermal ...

The Role of the Artesian Hydrothermal Systems in the ...

Keywords: large-volume acidic rocks, volcanic complex, "supervolcano", geothermal area, long-lived volcanic centers, volcano-tectonic depression, hydrothermal metamorphism, cap rock, ignimbrites, glacier. ABSTRACT The formation of large volumes of rocks of acid volcanism is an important process in the geothermal regions of Kamchatka.

What is a hydrothermal breccia? – SidmartinBio

Sedimentary breccia may be formed by the debris flow of a submarine. What kind of rocks are breccias? Breccia is commonly used for clastic sedimentary rocks composed of large sharp-angled fragments embedded in a fine-grained matrix of smaller particles or mineral cement.

Hydrothermal Sedimentary Mineralization of the …

The result shows that the super‐large Bamianshan fluorite deposit is of hydrothermal sedimentation genesis, deformed by the later hydrothermal fluid. Integrated with host rocks and orebody characteristics, it is inferred that the deposit …

Hydrothermal-sedimentary dolomite — a case from the …

directly from hydrothermal solutions at the bottom of a lake within a large peridotite-serpentinite massif and were named "hydrothermal-sedimentary dolomite" (Ilich 1974). This study was the first to investigate hydrothermal-sedimentary dolomite in the world. Never-theless, hydrothermal-sedimentary dolomites did not be-

Structure and evolution of hydrothermal vent complexes …

of hydrothermal vent complexes in sedimentary basins, their abundance and structure may lead to a better understanding of the causes of the abrupt climate changes that are associated with many large igneous provinces (e.g. Wignall 2001; Courtillot & Renne 2003). Hydrothermal and phreatomagmatic vent complexes are recog-

Hydrothermal-sedimentary dolomite — a case from the …

The Middle Permian Lucaogou Formation in the Jimusar Sag, eastern Junggar Basin, NW China, was deposited in a salt lake within an intracontinental rift basin with intense hydrothermal activity. Hydrothermal-sedimentary dolomite in the form of three types of dolostones, namely, analcime-feldspar dolostone (AFD), silicic dolostone (SD) and buddingtonite-albite …

A Hydrothermal-Sedimentary Context for the Origin of Life ...

A Hydrothermal-Sedimentary Context for the Origin of Life. ... In these layers, the rocks are also suffused by myriad small to large, late-stage hydrothermal silica veins. Toward the top of the outcrop, although the silica contents are still high (up to 96%), ...

Sea-level changes and hydrothermal sedimentary ...

Read "Sea-level changes and hydrothermal sedimentary mineralization of large-superlarge ore deposits among Sinian to Triassic in South China, Science in China Series D: Earth Sciences" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Hydrothermal Sedimentary Mineralization of the …

The Bamianshan fluorite deposit is a super-large one recently discovered in Zhejiang Province of China. This paper presents an analysis of its geological background, orebody and ore characteristics, petrochemical characteristics of host rocks, rare earth elements (REE) of rocks and ores, fluid inclusions in fluorite and Sm-Nd isotopic features in an effort to study its …

Hydrothermal sedimentary discrimination criteria and its ...

Abstract: Hydrothermal sedimentation is widely distributed in our country,and large oil and gas reservoirs have been found in hydrothermal sedimentary areas.Combined with the practical researches on hydrothermal sedimentation and hydrocarbon source rocks show that there is a good coupling relationship between the hydrothermal sedimentary and the source …

Modeling fluid flow in sedimentary basins with sill ...

intrusions: Implications for hydrothermal venting and climate change Karthik Iyer and Lars Rupke€ Future Ocean, GEOMAR, Wischhofstra e 1-3, DE-24148 Kiel, Germany ([email protected]) Christophe Y. Galerne GeoModelling Solutions , Zurich, Switzerland [1] Large volumes of magma emplaced within sedimentary basins have been linked to multiple ...

HYDROTHERMAL VEIN DEPOSITS - Earth Sci

Hydrothermal ores are distinguished by their large number of component minerals. They are usually unevenly distributed in the contours of ore bodies, forming alternating zones of high and low concentration that determine …

Ross Large - Profiles | University of Tasmania

Large RR, Gregory D, Halpin J, Danyushevsky L, Lounejeva E, et al., 'Trace elements in sedimentary pyrite through time: application to understanding temporal changes in ocean oxygenation and ore deposit cycles in marine …

A Hydrothermal-Sedimentary Context for the Origin of Life ...

The hydrothermal pathways through sedimentary systems could have distributed soluble compounds leading to their distal accumulation. FIG. 11. Schematic synthesis of the proposed Hadean, hydrothermal-sedimentary micro-reactor environment for complexification of prebiotic chemistry. Slightly acidic seawater entraining dissolved and particulate ...

Oceanography The Sulfur Cycle - The Oceanography …

namibiensis becomes abundant. it is also in these regions that large sedimentary deposits of phosporites are found. (3) at deep-sea hydrothermal vents, sulfate precipitates out of seawater as anhydrite (CaSo 4) at temperatures above 150°C. However, hydrogen sulfide is produced by leaching sulfur from basalt at high

Hydrothermal Sedimentary Mineralization of the Super …

The result shows that the super-large Bamianshan fluorite deposit is of hydrothermal sedimentation genesis, deformed by the later hydrothermal fluid. Integrated with host rocks and orebody characteristics, it is inferred that the deposit …

Massive methane fluxing from magma–sediment …

Lusi is a sediment-hosted hydrothermal system, where shallow magmatic intrusions within a sedimentary sequence affect source rocks and/or hydrocarbon reservoirs, degassing large amounts of both ...

Hydrothermal Minerals - National Museum Wales

This style of hydrothermal mineralization is thought to be derived from residual fluids formed during deposition of large sedimentary-exhalative Pb-Zn deposits, such as those of the Irish Midlands. Such fluids are magnesium-rich and sulphur-poor, and they readily precipitate saddle dolomite when they encounter carbonate rocks high in the Earth ...

Mafic intrusions, hydrothermal venting, and the basalt ...

The emplacement of large intrusive complexes into sedimentary basins can have profound effects on host sedimentary rocks including deformation, thermal aureole metamorphic reactions, alteration of fluid-flow pathways, and the formation of associated hydrothermal vent complexes (HVCs).

Modeling Hydrothermal Venting in Volcanic Sedimentary ...

1 Modeling Hydrothermal Venting in Volcanic Sedimentary Basins: 2 Impact on Hydrocarbon Maturation and Paleoclimate 3 *Karthik Iyer1,2, Daniel W. Schmid1,3, Sverre Planke4,5 and John Millett4,6 4 *[email protected] 5 1 GeoModelling Solutions , Zurich, Switzerland 6 2 GEOMAR, Helmholtz Centre for Ocean Research, Kiel, …

Estimate of the Geothermal Energy Resource in the ... - …

energy available in U.S. sedimentary basins. 1. Review sedimentary basins throughout the United States and eliminate basins with lowest potential – Top 15 basins were identified 2. Delineate and map areal extent and depth contours of each basin identified for spatial analysis purposes 3. Estimate temperature profile for each basin using

Gold Deposits and Their Geological Classification

1. A significant number of large deposits are the results of superposi-tion of two or more systems, or of superposition of distinct com-ponents of hydrothermal systems due to telescoping (Sillitoe, 1994): this can lead to apparently hybrid deposit types. 2. Different geological environments are also commonly superim-posed upon one another.

Hydrothermal Sedimentary Mineralization of the …

Read "Hydrothermal Sedimentary Mineralization of the Super‐large Bamianshan Fluorite Deposit in Zhejiang Province, China, Acta Geologica Sinica (English Edition)" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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Abstract: The hydrothermal sedimentary rocks of Lower Cretaceous Bayingebi Formation in Yingejing Depression of Bayingebi Basin has unique sedimentary structure and mineral composition.Methods:Based on the comprehensive study of petrology,mineralogy and geochemistry,this paper describes in detail the characteristics of lacustrine hydrothermal …