Mechanical abrasion of kimberlite indicator minerals: experimental investigations

Афанасьев, В. П.; Николенко, Е. И.; Tychkov, N. S.; Титов, А. Т.; Толстов, А. В.; Kornilova, V.P.; Sobolev, N. V.

doi:10.1016/j.rgg.2008.01.001

Cited by 39 publications

(11 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Such minerals have been transported very short distances and are generally found within kimberlite eluvium and nearby aureoles [18][19][20]. The preservation of mineral intergrowths, kelyphitic rims, and inclusions is further evidence of the extremely limited transport distance and absence of mechanical abrasion of the grains.…”

Section: Morphologic Study Of Kimsmentioning

confidence: 98%

Diamond Exploration Potential of the Northern East European Platform

Shchukina

Shchukin²

2018

Minerals

View full text Add to dashboard Cite

Abstract:In this study, we assess the diamond exploration potential of the northern East European Platform based on aeromagnetic survey results and the morphologic and geochemical analysis of 1513 grains of kimberlite indicator minerals (KIMs), such as purple pyrope garnet, olivine, and Cr-diopside. These minerals were recovered from samples collected from modern river and stream sediments in four areas located in the north-eastern (within the Arkhangelsk Diamondiferous Province) and south-western (hundreds of kilometers outside of the Arkhangelsk Diamondiferous Province) parts of the Arkhangelsk region in the European part of Russia. All the studied areas are located within ancient cratons, including the Kola, Karelian, and Shenkursk cratons. Based on the major element compositions of the KIMs and thermobarometric calculations, this study confirms that the lithospheric mantle beneath the studied areas is suitable for the formation and preservation of diamonds. The high percentage of KIMs with primary magmatic grain surface morphologies is evidence of the presence of local kimberlite sources within all of the studied areas. The significant amount of diamond-associated KIMs indicates that the potential sources are diamondiferous. Hence, the results suggest that the studied areas can be recommended for further diamond prospecting activity with a high probability of discovering new diamondiferous kimberlites.

show abstract

Section: Morphologic Study Of Kimsmentioning

confidence: 98%

Diamond Exploration Potential of the Northern East European Platform

Shchukina

Shchukin²

2018

Minerals

View full text Add to dashboard Cite

show abstract

“…5071Ë/4, ïðîáà 6) è â ñðåäíåì ñîñòàâëÿåò 11,11 êã/ò. Ïðåäñòàâëåí óãëîâàòûìè, óãëîâàòî-îêðóãëûìè, èçðåäêà îêðóãëûìè ç¸ðíàìè 0-I êëàññà ñîõðàííîñòè [1,4,8]. Ïîâåðõíîñòè ç¸ðåí øåðîõîâàòûå, ðåaeå ìàòèðîâàííûå, áóãîð÷àòûå.…”

Section: âåùåñòâåííûé ñîñòàâ êèìáåðëèòîâûõ ïîðîäunclassified

Geological structure and material composition of the kimberlite body «Yanvarskoe» (Daldyn-Alakit diamond-bearing district)

Ivanov

Толстов

Иванов

2018

Izvestiya Vysshikh Uchebnykh Zavedeniy. Geologiya i Razvedka

View full text Add to dashboard Cite

The new kimberlite pipe «Yanvarskaya» has been discovered in the Alakit-Markha field by a complex of geological and geophysical methods. For its delineation and the study three profile of wells were covered: one profile is along the long axis and two are in the cross stretch at the network 40x40 m. In wells geophysical researches, and also testing works, were carried out, including the selection ot the nine core samples with a total weight of 1120 kg, at the wells which had opened kimberlite. Yanvarskoe kimberlite body has a dike-like form with the orientation of the long axis in a North-East direction (50—55°) with sizes under overlying rocks 90x45 m, with an area of 2836 m2, which allows reference of this body to the class of small bodies. The body is composed of porphyry kimberlites of greenish-gray and yellowish-brown colors, strongly altered, dissected by numerous differently oriented cracks filled with calcite. Based on the results of core testing, a diamond of class -2+1 mm weighing of 2.1 mg (0,01 car.) was found.

show abstract

“…Regarding the question of the survival of diamonds during *300 km of transport along the Krishna River, recent studies on the relative abrasive stability of kimberlite indicator minerals such as pyrope, picroilmenite, olivine, apatite, diamonds, as well as kimberlite fragments, revealed that diamond is the most durable of them all and could survive long distances of transport (Afanasev et al 2008). Microdiamonds recovered recently in the beach placers of the Krishna-Godavari delta (Subrahmanyam et al 2005) could also have been derived from the RKF.…”

Section: Possible Source Of Alluvial Diamonds In the Krishna River Basinmentioning

confidence: 99%

Carbonate xenoliths hosted by the Mesoproterozoic Siddanpalli Kimberlite Cluster (Eastern Dharwar craton): implications for the geodynamic evolution of southern India and its diamond and uranium metallogenesis

Rao

Anand

Dongre³

et al. 2009

Int J Earth Sci (Geol Rundsch)

View full text Add to dashboard Cite

A number of limestone and metasomatised carbonate xenoliths occur in the 1,090 Ma Siddanpalli kimberlite cluster, Raichur kimberlite Field, Eastern Dharwar craton, southern India. These xenoliths are inferred to have been derived from the carbonate horizons of the Kurnool (Palnad) and Bhima Proterozoic basins and provide evidence for a connection between these basins in the geological past. A revised Mesoproterozoic age is proposed for the Bhima and Kurnool (Palnad) basins based on this kimberlite association and is in agreement with similar proposals made recently for the Chattisgarh and Upper Vindhyan sediments in Central India. The observed Bhima-Kurnool interbasinal uplift may have been caused by: (1) extension-or plume-related mafic alkaline magmatism that included the emplacement of the southern Indian kimberlites at *1.1 Ga, (2) mantle plume-related doming of the peninsular India during the Cretaceous, or (3) Quaternary differential uplift in this region. It is not possible, with the currently available geological information to constrain the exact timing of this uplift. The deep erosion of primary diamond sources in the Raichur kimberlite Field in the upper reaches of the Krishna River caused by this uplift could be the elusive source of the alluvial diamonds of the Krishna valley. Mesoproterozoic sedimentary basins can host world class unconformity-type uranium deposits. In light of its inferred Mesoproterozoic age, a more detailed stratigraphic and metallogenic analysis of the Kurnool basin is suggested for uranium exploration.

show abstract

Mechanical abrasion of kimberlite indicator minerals: experimental investigations

Cited by 39 publications

References 1 publication

Diamond Exploration Potential of the Northern East European Platform

Diamond Exploration Potential of the Northern East European Platform

Geological structure and material composition of the kimberlite body «Yanvarskoe» (Daldyn-Alakit diamond-bearing district)

Carbonate xenoliths hosted by the Mesoproterozoic Siddanpalli Kimberlite Cluster (Eastern Dharwar craton): implications for the geodynamic evolution of southern India and its diamond and uranium metallogenesis

Contact Info

Product

Resources

About