概要書

 

西カリマンタン、ムラウィ盤層ムヌクン地区での

新たに発見された有望な石炭層

 

 

 

 

 

 

 

 

採掘権利者

 

PT. MELAWI RIMBA MINERALS

 

PT. SINDO RESOURCES

 

 

 

 

 

 

 

 

 

 

 

 

 

JAKARTA, MARCH 2007

 

 

 

位置：　インドネシア国西カリマンタン州メラウィ地区

 

採掘権の詳細

 

 

初期調査許可の５つの採掘権（有効期間1年間）は、2006年12月27日にPT. MELAWI RIMBA MINERALSにメラウィ県長によって、No.368,369,370,371,372で許可された。総面積25,000Ha

 

３つの探鉱許可の採掘権（有効期間3年間）と５つの初期調査許可の採掘権は、2006年12月18日にメラウィ県長によりPT. SINDO RESOURCESにNo.354,355,356,357,358,359,360,361で許可された。総面積28,050Ha

 

この地区は、メラウィ県とメヌクン郡の行政下にあり、２つの区画の面積は53,050Haである。

 

この採掘権の位置確定は、1993年鉱業エネルギー省鉱物資源地質局発行に　よって発行された125万分の1のNanga Pinoh地区の地質図を用いた

 

 

 

 

場所とアクセス

 

この権利確保地は、

南緯S 00°,23’,00” 〜00°,34’,15”　東経112°,01’,30” 〜 112°,21’,00”に位置する

 

この地までは、州都ポンティアナクよりメラウィ地区の中心地Nanga Pinohまで車で行く。道は舗装はされているが極めて悪路である。そこからメラウィ河を遡り、林業用道路や小路を車、バイク、あるいは徒歩で目的地に達する。

 

 

 

 

この地区の地質、地層、形態

 

この地区の石炭層は第三紀の始新世・漸新世時代後期から漸新世時代に形成されたものである

 

 

Tebidah Formation (Tot). Thick bedded well sorted sandstone and thin-bedded silty sandstone interlayered with sandy siltdtone, mud stone (green, red,  and grey) and thin seams of dirty coal; breccia and coarse sandstone overlapping batholith to South; one exposure on thin limestone in East.

Sandstone ;mainly feldspathic with volcanic fragments;cross-bedding and ripple marks.

 

 

Payak Formation (Teopa). Thick-bedded to massive tuffaceous with some grey, green, and red mudstone; conglomerate at base.

Sandstone: fine to medium lithic arkose with volcanic fragments, coaly laminae in fine sandstone; cross-bedding and ripple marks.

Stratigraphy

 

The concession regional Geology cover parts of two Geological provinces; the Cretaceous Schwaner Batholith, and the early Tertiary Melawi Basin. Although the boundary of the two is probably partly controlled by east-southeast-trending faults, the Schwaner Batholith might underlie at least the southern part of Melawi Basin. However, the regional picture provided by Pieters & others (1987) and Pieters & Supriatna (1990) suggest that the Melawi Basin is largely underlain by two equivalent Cretaceous sedimentary units – The Pedawan Formation in the west and Selangkai Group in the east. The Selangkai Group also forms much of the Semitau Ridge along northern boundary of the Melawi Basin.

 

 

Structure and tectonic

 

The overall structure of area is apparently simple,an asymmetric basin filled with lower tertiary  sedimentary rock lies against a batholith of Cretaceous granitoids containing large intricate screens of regional metamorphics. Overall the boundary between basin and batholith follows a west-northwest line over 300 km, and is probably controlled by concealed faults. The  lower Tertiary sedimentary rocks of the basin become progressively more deformed toward to the northern.

 

 

Structure observed in the rock of the regional area :

 

 

Physiography

 

The dominant landforms in the regional area are the Melawi lowlands in the north and the Schwaner highlands in the south. The Beturan highlands and the Alat Plateau in the northeast corner of the regional area break the continuity of the Melawi lowlands. Extensive intramontane depressions are also developed in places within the Schwaner Mountains, particularly along the Pinoh River, as the landform here named the Sayan lowlands.

 

 

The Schwaner highlands ,named the Schwaner Mountains by Molengraaff (1902),comprise forest-covered mountains, generally with moderately gentle slopes rising from the Melawi lowlands to the north. The highland are formed by granitic and metamorphic rocks breached by a few steep subvolcanic plugs  in the northwest, in the head waters of the sepauk Rivers.

 

 

The Melawi lowlands comprise the low land extending from the Melawi River to the northern margin of the Schwaner higlands, and northwards for over 50 km to the Kapuas River in Sintang and to the hills and mountains of Beturan highlands. The lowlands are developed on the gently dipping sedimentary rock of the Melawi Basin. The landforms is a flat to undulating surface with low gentle hills, interrupted   in places by low sandstone escarpments and a few abrupt and high subvolcanic plugs. The flood plain of the Melawi River is between 20 and 30 m  above sea level, and the surface of the lowland is generally about 30 m higher than the flood plain.

 

The maturity of the Melawi River system is confirmed by slightly incised nature of the well developed meanders in the east-central part of the regional area, and by the existence of dissected alluvial deposits perched several meters above those currently being formed.

 

 

 

 

Coal Outcrop sampling

 

A total 35 samples of surface outcrop seam were collected, mostly from the small creek within the concession. All samples noted and sample numbering, location recorded by using handheld GPS.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

List of Outcrpos and coordinates location within KP concession PT Melawi Rimba Minerals

 

 

Menukung district, Melawi Recency, West Kalimantan

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No.

Sample

Elev.(M)

Location

East o

East'

East"

Soth O

South '

South"

Thick(m)

Strike/Dip

Remarks

1

AZ-01

84.0

Sei Alim

112

13

43,5

0

27

34.10

0.80

270/7

 

2

AZ-02

101.0

Sei Alalau

112

13

42.20

0

27

44.20

0.70

265/7

 

3

AZ-03

110.0

Sei Asam Bubuk

112

13

49.70

0

27

41.80

0.50

265/5

 

4

AZ-04

67.0

Sei Oyau

112

13

57.50

0

25

0.80

0.50

285/7

most of outcrop

5

AZ-05

66.0

Sei Belonti

112

14

6.10

0

25

54.50

0.50

265/7

exposed in small

6

AZ-06

128.0

Sei Alim

112

14

4.40

0

27

54.50

0.80

285/6

creek whitin KP's

7

AZ-07

58.0

Sei Balaban Jaya

112

13

28.20

0

25

40.50

0.50

280/10