20241111_PSAB_Laporan Informasi dan Fakta Material_31766345_lamp1.pdf

metalurgi yang bertujuan untuk melihat karakteristik bijih dan potensi recovery. Hasil studi
pengujian metalurgi awal ini menunjukan hasil yang sangat menggembirakan.

Pengujian metalurgi ini meliputi analisa head grade (head grade analysis), pengujian pelindian
cepat (QLT/Quick Leach Test), pengujian pelindian diagnostik (DLT/Diagnostic Leach Test),
pengujian pelindian dalam botol (bottle-rolled test) dan pengujian pelindian dalam kolom
(column test). Hasil pengujian metalurgi menunjukan nilai QLT berkisar antara 80 sampai 88%
atau nilai rata-rata 85% yang menunjukan karakteristik jenis bijih oksida dan kehadiran butiran
emas bebas (free gold) di dalam batuan bijih. Hal ini sejalan dengan hasil pengujian DLT
(diagnostic leach test) yang rata-rata presentase emas yang berasosiasi dengan mineral oksida
dan bisa diekstrak dengan pelindian sianida adalah sebesar 90%, sedangkan sisanya 10%,
emas berasosiasi dengan mineral karbonat (7%), mineral sulfida (1%) dan mineral silika (2%).
Hasil pengujian pelindian botol (bottle rolled test) dengan ukuran 75 µm juga menghasilkan
nilai antara 89 dan 93%, yang menunjukan jenis bijih oksida dan kehadiran melimpah butiran
emas bebas (free gold grains). Namun sebaliknya, hasil pengujian pelindian kolom (column
test) ukuran 25mm menunjukan nilai yang rendah 45 sampai 74%. Hasil pengujian metalurgi
awal ini menunjukan bahwa proses pelindian dalam tangki atau CIL (carbon in leach) adalah
rute proses yang paling cocok dengan potensi recovery lebih dari 90%.

Sebagai informasi, sebelum Perseroan melakukan eksplorasi di area ini, beberapa perusahaan
tambang internasional terdahulu telah melakukan eksplorasi awal, diantaranya Kerjasama
Placer Dome Inc Kanada dan PT Antam dari tahun 1989 sampai tahun 1990, perusahaan
Amerika Newmont dari tahun 1993 sampai tahun 2000, kemudian perusahaan Inggris Avocet
Plc. dari tahun 2000 sampai tahun 2011.

Jakarta, 11 November 2024
PT J Resources Asia Pasifik Tbk

English version

                              J Resources New Gold Prospects
                        has Potential Economic Value to be Developed

As a follow up to the discovery of new gold prospects in the mining area of one of its
subsidiaries in North Sulawesi, PT J Resources Asia Pasifik Tbk ("the Company") has carried out
several exploration programs which produced positive results. Based on production simulation
based on the results of potential reserve optimization (PEA inventory) and preliminary economic
assessment, this prospect produced encouraging economic indication with a mill throughput
capacity of 1.3 million tons of ore annually, it is expected to produce 70 to 100 thousand oz of
gold (more than 2 to 3 tons annually) for more than 10 years.

These follow-up activities which have been carried out throughout 2024 aim to see the potential
of gold exploration targets and preliminary economic analysis studies. These program are a
follow up to the initial exploration that were carried out during 2023. With these positive results,
the Company hopes that a follow up drilling and development programs can be carried out
immediately so that this prospect could be developed into an economical mine.

Programs that have been carried out include geological mapping and detailed rock sampling,
spectral analysis, gold resource modeling, exploration targets estimation, gold inventory
simulation, preliminary metallurgical studies and analysis, as well as preliminary economic
assessment (PEA). In addition to that, baseline mapping of the environment and biodiversity has
also been carried out by the Company.

Gold mineralization in this prospect is a primary mineralization with low sulfidation epithermal,
which consists of three main quartz veins containing gold, namely Oboy, Odik and Mangkasep.
The results of modeling and estimating the exploration target of the main vein, namely Oboy
(OMV or Oboy Main Vein) resulted in an exploration target in the range of 10 to 15 million tons,
with a grade range of 1.5 to 2.5 g/t Au. Modeling of the other two veins, namely Odik and
Mangkasep, has resulted in exploration targets ranging from 7 to 10 million tons, with grade
ranging from 1 to 3 g/t Au.

Seeing the large potential exploration target and the relatively high grade, this prospect has
great potential to be developed into an economical gold mine. Therefore, the preliminary
metallurgical test work, optimization of potential reserves (PEA inventory) and preliminary
economic assessment have been carried out. 959kg of ore samples containing gold,
representing 5 different types of ore, have been taken for metallurgical testing aimed to look at
ore characteristics and recovery potential. The results of this initial metallurgical test study
showed very encouraging results.

This metallurgical test includes head grade analysis, quick leach test (QLT), diagnostic leach
test (DLT), bottle-rolled test and column test. Metallurgical test results show QLT values ranging
from 80 to 88% or an average value of 85%, which shows the characteristics of the oxide ore
type and the presence of free gold grains in the ore rock. This is in line with the results of the DLT
(diagnostic leach test) where the average percentage of gold associated with oxide minerals
and can be extracted by cyanide leaching is 90%, while the remaining 10%, gold associated
with carbonate minerals (7%), minerals sulfide (1%) and silica minerals (2%). The result of 75
µm bottle rolled test has produced values between 89 and 93%, which indicates the type of
oxide ore and the abundant presence of free gold grains. However, on the contrary, the results
of the 25mm column test showed a low value of 45 to 74%. These preliminary metallurgical test
results show that the tank leach process or CIL (carbon in leach) is the most suitable process
route with a recovery potential of more than 90%.

For your information, prior to the Company’s exploration activities in this area, several
international mining companies had carried out initial exploration, including Canadian Placer
Dome Inc Collaboration and PT Antam, from 1989 to 1990, an American company, Newmont
from 1993 to 2000, then a UK company, Avocet Plc. from 2000 to 2011.

Jakarta, 11 November 2024
PT J Resources Asia Pasifik Tbk