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Pakistan Stratigraphy

Chagai-Raskoh Magmatic Arc

Chagai Hills

Northern Balochistan, along Afghan border · Active volcanic arc, subduction-related

Active volcanic arc with Cretaceous to Recent magmatic rocks. Contains copper-gold porphyry deposits (Saindak, Reko Diq). Part of the Chagai-Raskoh Magmatic Arc.

Units

10

Tectonic setting

Active volcanic arc, subduction-related

This reference records 10 units in the Chagai Hills spanning 3 geological eras, most commonly conglomerate, evaporite, limestone.

At a glance

10
units
3
eras
3
georeferenced
7
with fossils
10
type localities
1,600 m
max thickness
19
sources

Rock types

  • conglomerate (4)
  • evaporite (3)
  • limestone (1)
  • sandstone (1)
  • igneous rocks (1)

Based on the primary lithology recorded for each unit; some units span more than one rock type.

Fossils recorded

  • Hippurites loftusi
  • Lepidorbitoides socialis
  • Orbitoides sp.
  • Omphalocyclus sp.
  • Algae
  • Foraminifera
  • Corals (in limestone interbeds)
  • Alveolina vredenburgi
  • Flosculina globosa
  • Miscellanea miscella
  • Saudia labyrinthica
  • Assilina granulosa
  • Assilina exponens
  • Assilina elliptica
  • Fasciolites oblonga
  • Discocyclina ranikotensis
  • Lituonella douvillei
  • Opertorbitolites douvillei
  • Lepidocyclina dilatata
  • Nummulites fichteli
  • Nummulites intermedius
  • Nummulites vascus
  • Nummulites atacicus
  • Dictyoconoides cooki

+5 more across the Chagai Hills units.

Units in this province

10 units

Line these up against other basins on the correlation panel →

Era colours
  • Quaternary
  • Cenozoic
  • Mesozoic
  • Paleozoic
  • Precambrian
Chagai Hills
ConglomerateIgneousLimestoneShale / mudFossils recordedConformable

Band colour = period; texture = dominant rock type. Lines between bands mark the contact type. True scale makes height ∝ recorded thickness; hatched = thickness not recorded. Ages approximate, for ordering.