Provenance of late Paleozoic sedimentary rocks in eastern Kazakhstan: implications for the collision of the Siberian margin with the Kazakhstan collage

A sequence of non-metamorphosed, little deformed, fossiliferous, sedimentary rocks, near Keremeos, southern British Columbia, unconformably overlies rocks having a history similar to that of the Vaseaux Formation, the most westerly exposed part of the Shuswap Complex of the southern Okanagan Valley. Fossils from the younger sequence have a late Mississippian – early Pennsylvanian age.This part of the southern Okanagan region has a deformational history that is pre-mid-Carboniferous and likely related to the Caribooan orogeny. This is in contrast to Late Paleozoic rocks at northern Okanagan localities and elsewhere in British Columbia that have under-gone strong deformation of probably Mesozoic age.

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Sr–Nd isotopic and geochemical constraints on provenance of late Paleozoic to early cretaceous sedimentary rocks in the Western Hills of Beijing, North China: Implications for the uplift of the northern North China Craton

Sedimentary Geology ◽

10.1016/j.sedgeo.2011.12.005 ◽

2012 ◽

Vol 245-246 ◽

pp. 17-28 ◽

Cited By ~ 12

Author(s):

Shiwen Xie ◽

Yuanbao Wu ◽

Shan Gao ◽

Xiaochi Liu ◽

Lian Zhou ◽

...

Keyword(s):

Early Cretaceous ◽

North China Craton ◽

North China ◽

Sedimentary Rocks ◽

Late Paleozoic ◽

Geochemical Constraints

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Microscopic Studies of Gold Deposit of Southern Ashaly in Eastern Kazakhstan

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.828.1 ◽

2013 ◽

Vol 828 ◽

pp. 1-10

Author(s):

Adilkhan Baibatsha ◽

Kulyash Dyussembayeva ◽

Aimkhan Kassenova

Keyword(s):

Gold Mineralization ◽

Sedimentary Rocks ◽

Sulfide Deposit ◽

Carbonaceous Shales ◽

Microscopic Studies ◽

Middle Carboniferous ◽

Gold Sulfide ◽

First Time ◽

Tuff Breccia ◽

Eastern Kazakhstan

The gold-sulfide deposit Southern Ashaly is localized in carbonaceous terrigenous formation (black shale strata) of the middle carboniferous (Bukon suite, which is the ore-hosting for super large deposit Bakyrchik). The Southern Ashaly is at the exploration stage and according to preliminary estimates of the expected resources belongs to a large deposit in scale. Ore gold mineralization of such level as Southern Ashaly in southwestern Kalba is found for the first time and gives hope for the discovery of such objects in the Boko Vassilyevskoye ore field. Ore-hosting at the field Southern Ashaly is carbonaceous terrigenous formation of the middle carboniferous, with no visible signs of volcanic formations. But, it was revealed, at microscopic research by us, paragenetic relation of the gold mineralization with small intrusions of plagiogranites and zones of plagiogranite porphyry dykes and found volcano-sedimentary rocks (aleuritic tuffsandstone, tuff breccia) which have undergone hydrothermal-metasomatic changes. The vein-disseminated gold-sulfide mineralization is associated with beresitizated plagiogranites and plagigranite-porphyries and hydrothermally altered tuff sandstones, tuff breccia and carbonaceous shales. Southern Ashaly unlike Bakyrchik deposit which contains invisible gold in sulfides, all the gold is concentrated in the pyrite mainly in the form of micro-sized (1-5 µm or less) in arsenopyrite is noted rarely.

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Paleozoic volcanic assemblages and volcanogenic massive sulfide deposits near Tulsequah, British Columbia

Canadian Journal of Earth Sciences ◽

10.1139/e84-041 ◽

1984 ◽

Vol 21 (3) ◽

pp. 379-381

Author(s):

Joanne Nelson ◽

John G. Payne

Keyword(s):

British Columbia ◽

Sedimentary Rocks ◽

Massive Sulfide ◽

Late Triassic ◽

Late Paleozoic ◽

Volcanogenic Massive Sulfide ◽

Small Bodies ◽

Sulfide Deposits ◽

Massive Sulfide Deposits ◽

Volcanogenic Massive Sulfide Deposits

New fossil, structural, and lithological evidence shows that the dominantly andesitic terrane near the junction of the Taku and Tulsequah rivers, northwestern British Columbia, is a proximal facies, roughly age equivalent to late Paleozoic tuffaceous and argillaceous sedimentary rocks exposed near Tatsamenie Lake, rather than of Late Triassic age as previously mapped. Fusulinids from the Tulsequah sequence are Middle Pennsylvanian, whereas the limestones at the top of the Paleozoic section near Tatsamenie Lake are of Permian age. The Tulsequah sequence hosts the Tulsequah Chief, Big Bull, and Ericksen – Ashby massive sulfide deposits, which arc associated with small bodies of rhyolite.

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